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Outdoor Free Flight Forum => Free Flight Scale => Topic started by: Crabby on January 15, 2016, 05:14:51 PM



Title: Don Srull Mig -15
Post by: Crabby on January 15, 2016, 05:14:51 PM
What to do while figging out what to do next... As some may remember, I lost OOS my Srull motivated pistachio Mig-15 a few years back. It was soo much fun once I got it "dialed in", then just as I was having the most splendid flying day, she just disintegrated, vanished into thin air! OK so I am doing another one, only much larger, while I think about the Spirit of St. Louis. Nothing is easy and doing a round fuse is problematic if you underestimate it. Here is my prep. I figured out the skewer technique when I did the Aronstein DC-10. This is a sure way to keep everything lined up and on center...You have seen plenty of these Migs built here, I am not going to invest a lot of time doing an internal fan. This thing is gonna be another hell-bent tractor. Stick with me while I try not to make this build a melancholy tear jerking saga! Remember I work standing up!


Title: Re: Don Srull Mig -15
Post by: tom arnold on January 15, 2016, 07:46:55 PM
Crabby, what is the source of the plans? Is that a Flying Models magazine source?


Title: Re: Don Srull Mig -15
Post by: Crabby on January 15, 2016, 09:05:52 PM
Yes....Flying Models January 1995. This thing even as a pistachio was capable of screaming speed and very high altitude. It is very deceptive in its apparent simplicity.


Title: Re: Don Srull Mig -15
Post by: Crabby on January 15, 2016, 09:08:23 PM
Here's my old Mig RIP. I can't wait to see what this new one is gonna be like.


Title: Re: Don Srull Mig -15
Post by: Audax on January 15, 2016, 09:42:21 PM
Hi Crabby,

OK, I'll bite...how big is "much larger?"


Title: Re: Don Srull Mig -15
Post by: Crabby on January 16, 2016, 01:48:10 AM
Hi Rich, I am going with 14" w/s...doesn't seem all that big but my last one was a pistachio, so this one looks huge to me. BTW I built your Staggerwing a while back and had a really good time. It flies as on rails. I am going to dogfight it with the Dave Mitchell Helldiver I finished last week, my wife is gonna pilot the Staggerwing.


Title: Re: Don Srull Mig -15
Post by: Audax on January 17, 2016, 11:59:43 AM
Yup, those swept wing jobs are a lot bigger than the span might lead you to believe. There's usually a long way between hook and peg too.  Once you get it dialed in, it'll cruise a long time. 

Glad to hear of your success with the little S'wing.  I've been amazed at the popularity of that design right from the start.  I've been on a quest for a dimer that can succeed it.  Dave Mitchell's Helldiver looks like a contender!


Rich


Title: Re: Don Srull Mig -15
Post by: Crabby on January 17, 2016, 01:50:22 PM
here's my example of simple not being easy...the stringers I chose for the job are soft and break easily...next time its gonna be flat strip bass. The rubber bands were intended to go on as I ran the stringer through...but they broke, so I am double gluing with duco, and using rubber band on the ends. I started out notching the formers but they didn't line up too well and they drove my OCD crazy. Here's another pic of my old Mig (RIP)


Title: Re: Don Srull Mig -15
Post by: Crabby on January 22, 2016, 04:16:48 PM
I took a little break and then I saw some troubles w/ the fuse. A round fuse will mess with your OCD... anyway, I true'd it up. Better that way at least I won't be paying paying Paul with Peter's dividends down the pike.  But like I say, I have learned to love imperfection...  I always replace my fly-aways. This Mig is gonna replace its older sister who went to Hung. I finally felt like starting the wings. Srulls plan calls for conventional ribs but I am a cracked rib fiend, basically because they look cool. I am a visual guy, and I only drink beer that comes in cool looking bottles.


Title: Re: Don Srull Mig -15
Post by: Crabby on January 22, 2016, 04:23:10 PM
Looking around after the last build wised me up, I found a few scraps of well-made silver tissue. It all seems to start with good black esaki... so, I am gonna cover this thing with black, then mist on some good old rattle-can floral silver. Good practice for the Spirit of St. Louis build I am practicing for. I have a nutty neighbor who has made that request. I think I have the machine polished look for the cowl solved. Now a paper motor... I have an imperfect technique for lightweight paper cylinders...


Title: Re: Don Srull Mig -15
Post by: Tommy Wee on January 23, 2016, 02:56:28 AM
Nice set of balsa bones. How much dihedral for the wings? Just interested how the sweepback affects it.
Two of my (many...) all-time favourites are this Mig and Saab J29 Tunnan (Barrel). Have thought of making a peanut of the Saab, maybe sometime.

Tommy


Title: Re: Don Srull Mig -15
Post by: Crabby on January 23, 2016, 11:57:09 AM
Hi Tommy thanks for stopping in...this little Mig is 15" wing span...it shouldn't take any at all but I am going to lift the tips about .25 and wash out the tips .06... My old Mig was a pistachio and I did about the same (in scale).


Title: Re: Don Srull Mig -15
Post by: Crabby on February 03, 2016, 07:16:02 PM
I admit rebuilding this Mig is purely for my selfish entertainment. You will see what I mean when you see the vids...BUT I am in practice for doing a Spirit of St. Louis and I need to do a nice silver with a rattlecan...My personal conditions include my models look like models and not scale reproductions, hence the rattlecan. Here are a few pics...I am starting with black esaki, the canopy was plunge formed on the stove. Just pull the eraser out of a pencil then drive the metal gizmo into the soft balsa, and bingo you have a stand that will stand up to the plunge.
Please begin with a thick mil plastic or you will wind up with a very thin flimsy result which will be hard to handle. The empanage is where all the charisma lies with this plane, all else is geometric and boring.The close up is just an example of Duco gussets... "Thee Olde Man" was a huge believer in the "glue gusset" RIP


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 04, 2016, 09:49:07 PM
Crabby,
Looks like you are making great progress.  I make my canopies the same way! But never thought of the pencil minus eraser setup.  Good idea!  I'll file that for future use!  Are the plans still available somewhere? 

I'd love to make this one too!  I make paper tubes of all sizes for my models and I quick dry them in the microwave oven for 10 seconds With a couple of laminations on the former they harden up nicely with white elmers glue.  A little tutorial on paper tubes here:  Click Here  (http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl?num=1397585562)
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on February 05, 2016, 08:46:51 AM
Hi Sky 9 thanks for the visit! One thing I love about sharing builds is the various bench methods other guys use. Paper tubes have always been a pain for me, your tutorial will be a help. I am going to make a paper motor for my upcoming Spirit. I have made paper cylinders with electrical wiring hardware...(the appliance strap and the threaded rod) they come out fairly well using black esaki. I am looking at paper clay but it seems kind of heavy. I can send you plans for this Mig if you PM me your email address. It was meant for an electric motor (and you build the fan) but I just put a tractor prop on the front. Its easier and I have nobody to impress.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 05, 2016, 10:05:01 AM
Nothing particularly earth-shaking here but just chronical this build...I had to give up on adhesives to detail the canopy and hand paint it. The trick is don't breathe, use a good brush and keep moving. I needed an oxygen tank to do the job ::) and I will probably have to hit it again. After I skin the tops of the wings I am going to warp in the washout, which probably is unnecessary, because of the swept wing but the plan calls for it and after all,...he is Don Srull :D


Title: Re: Don Srull Mig -15
Post by: Pat Daily on February 05, 2016, 11:36:55 AM
When Don speaks, smart men listen!  His Mig 15s are really cool.  Wally Farrel also built one last year or so with Don's coaching.  Years ago, Don built a rubber powered ducted fan Mig 15 for indoor -- was pretty neat!  I like the way your Mig is looking. What color scheme?  I love the red ones.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 05, 2016, 12:12:27 PM
Hello Pat! thanks for chiming in!  What really got me about this little plane was the speed and the altitude once I got the launch and power source all figged out. I throw mine like a baseball. Doing Don models is like reading one of the classics, and wishing there were more chapters!


Title: Re: Don Srull Mig -15
Post by: Pat Daily on February 05, 2016, 05:58:34 PM
Crabby

I talked with Don today about some photos, etc. that he needed and I told him about your Mig 15 build.  He got a kick out of it. 


Title: Re: Don Srull Mig -15
Post by: Crabby on February 06, 2016, 02:20:59 PM
Here's a couple of color options I am looking at. Of course my choice is the one in the middle, but the one on the left has me aroused... then of course the "no %$#ing way scheme... I see I have to do another canopy... now for the sad news...13.5 grams total weight...on a 14.5 wingspan plane. I shamefully admit to doping the fuse...this thing is getting kind of porky. Pat, thanks for telling Don about this saga! I spoke briefly on the phone with him when I did my Lippisch P-13 (?) That was looong ago.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 06, 2016, 05:14:15 PM
How fortunate Pat is to fly regularly with Don....
Lots of schemes and I can appreciate the simplicity of the silver one, but where did you find the blue checker board one!  What a finish!  I'm with you though, that would be a real task to attempt it! I'm with Pat, the red one looks really nice and fairly simple.
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on February 07, 2016, 11:13:07 AM
OK after a courage pill I am ready to spray this thing silver... here is my rotating fuse spray booth...put cylindrical fuse back on skewers, place in rotissarie, grab 1 pint of whiskey (Old Grand-Dad) and 1 Fosters, and one rattle-can of flat silver krylon... drink 1 part Old GD to 2 parts Fosters, brace self. With left hand slowly spin fuse now, AND with non-shaky right hand spray silver east to west... do not stop motion or paint. Quit soon! DO NOT LOOK AT RESULTS! walk away, repeat step 1 check in 1 hour....


Title: Re: Don Srull Mig -15
Post by: Crabby on February 07, 2016, 12:46:19 PM
As I always maintain, I have learned to love imperfection...Here is my imperfect result. But I don't count the flaws. One thing is if you think you are getting to be a good framer, just cover with good esaki and spray it silver...every little problem looks like acne! Oh and if you want to cover a bad frame job use black. It is a great forgiver of cardinal sins! more later! Oh and I re-did the canopy...


Title: Re: Don Srull Mig -15
Post by: Glenn (gravitywell) Reach on February 07, 2016, 01:38:28 PM
Hi Crabby....excellent and fun built thread as always.  Thought I would just let you know that I have spotted a bad problem with your paint job.....the black on that knife handle appears to be flaking off terribly.  You may have to fix it as we all know the paint job of a knife handle is a direct indicator of the knife working well or not.  I do hope this info is helpful! ;D  Please keep up the build threads....they are way too good and much fun.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 07, 2016, 05:32:40 PM
Thanks for stopping in to say hello Glenn! Yes my tools are all flaky and crusty. I usually have to clear coat em from time to time to keep the flakes out of the job! ;D I am stuck on the paint scheme because the overall weight is reaching the point of no-return... if I keep fooling around I may be powering this thing with a Cox .049!


Title: Re: Don Srull Mig -15
Post by: Crabby on February 10, 2016, 09:53:10 AM
I built a hand sanding jig to get the roots at the correct angle for the dihedral. First I had to add some soft 1/8" so I had something to sand away...then double glued with Duco. This may be the first model I do with a pilot. Nothing like the carved foam statues some of you guys fashion. This plane is at the 163 Komet phase right now. I will try to have the rudder and stab on tonight. I am really watching the weight right now. I picked up some more weight painting the tail 16g :'( I also lost the charm of the visible stick work.


Title: Re: Don Srull Mig -15
Post by: tom arnold on February 10, 2016, 10:01:18 AM
Beautiful job, Crabby, and I have a question. Since we don't have a plan in front of us which may explain things, but how did you tie the wings to the fuselage? Heavy duty ring formers at the wing location or what? Thanks.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 10, 2016, 10:26:56 AM
Good morning Tom thank you for stopping in! Well the plan requests "plug in" wings. To receive the "plugs" which are mostly extensions of the spar, etc, there is a plank of sheet glued in between the fuse stringers. The fuse has a center section that is "supposed" to be perfectly cylindrical (not tapered like the front and rear ends), and that is where the wings mount. I did not fool with the plugs and just went for a perfectly sophomoric approach, and did a "Duco double glue" They are on there like stink on $#%%^. I hope I don't ever want to remove 'em.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 10, 2016, 10:31:53 AM
Tom brought up a point I neglect sometimes in my builds...a look at the plan I am on...so others can follow along. I am not going to get into the issues of whether or not it is kosher to upload the plan without some kind of authorities blessing, Don Srull, being the guy he is would probably not give a damn, but he may have sold the rights to so & so, whoever, on & on! Why do I care? I'm broke!


Title: Re: Don Srull Mig -15
Post by: Crabby on February 10, 2016, 10:42:30 AM
www.youtube.com/watch?v=GCkIqMZMmkc

I know this video of my last Mig-15 (pistachio size) has been around some time now, but here it is again. This is a vid we took just before I lost it forever. The vain use of The Maker's name you will hear is not related to the flight, the kid was yelling because he stubbed his toe on something. This was a more laid back flight, the rubber was pretty much played.


Title: Re: Don Srull Mig -15
Post by: Balsa Ace on February 10, 2016, 06:11:45 PM
Great work.

Scott


Title: Re: Don Srull Mig -15
Post by: Mooney on February 10, 2016, 07:16:09 PM
Haha!  That little jet is screamin'.  With the jet engine sound in the background, it is quite realistic.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 12, 2016, 10:52:22 AM
Hi Balsa Ace and Mooney, Say Mooney are you the same Mooney as Walt's son? forgive my ignorance either way! Here I am giving this little jet the star treatment. I think the stars are too big but I don't think Putin gives a damn and Stalin can yell at me when we play checkers in St. Peter's garden, if we both get there. I hand cut the white stencil, brush on with white acrylic, then cut the stars out of some kinda red. Gluestick 'em in place then flow alcohol through a'la the dope method. Works great for me. I love imperfection anytime I see it


Title: Re: Don Srull Mig -15
Post by: Tommy Wee on February 12, 2016, 11:18:11 AM
Looks great to me. Simple scheme, suits the Mig just fine.

I rather believe that Stalin has no chance of entering any after-life gardens, even though it might actually be interesting to meet him.

Tommy


Title: Re: Don Srull Mig -15
Post by: Mooney on February 12, 2016, 07:08:39 PM
Hi Crabby,
Nope, not related to THE Walt Mooney.  I admit he's one of my fave designers, but nope, not related.  As a boy, I was asked this question and would answer " Yup, he's my Grandpa!"  Never occurred to me there was another Walt Mooney walking around.  Very quickly the conversation would become a mystery to me and I'd realize they were speaking of someone else.  We share a name, but I am alone in my interest of aviation in my family.  Can't imagine what it might've been like if I could build alongside someone like Millard Wells or Walt Mooney!  Haha, I know why my early stuff wouldn't fly


Title: Re: Don Srull Mig -15
Post by: Crabby on February 12, 2016, 08:49:39 PM
Hi Mooney thanks for setting the record straight....! My Olde Man was an issue. Here is a tack up. I used the blue gummy stuff from Office Depot. I like Soviet planes and poetry. Function before Form always. This thing is as simple as it gets.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 13, 2016, 01:26:29 PM
Crabby, she's absolutely gorgeous!!! Well Done!  Gotta start mine soon.
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on February 14, 2016, 12:24:09 PM
Hi Sky 9! thanks for the kind words, If you actually try this thing, don't trust the stringer location on the plan. I found out that (A) they really don't line up or...(B) despite my home-made humdinger notching tool, and all the best intentions I just couldn't hit the mark. My plan was shot from the mag in our old (hand) cranky litho camera at work a ways back, and there is distortion in spite of being in perfect focus. No way did Srull draw em not right on the mark. I have OCD and the wavy stringer thing drove me nuts so I trashed my first fuse and went back to tacking 'em to the outside of the formers, which is a bit of a heavier way to go.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 14, 2016, 02:47:02 PM
I was looking around the 'net for pics of Mig 15 pilots. I have never put a pilot in any of my models. I came across the story of No Kum Sok who defected with his Mig 15, ignorant of Operation Moolah where the US offered 100,000 to anyone who could surrender a Mig to a US base. It's a good story, and fun to read about what a hellish plane the Mig 15 was to fly. My pistachio (seen in the video) was prone to unexplainable and unrecoverable spins. Out of the blue the thing would go nuts and get everyone around laughing like drunk hyenas. The nose would stay centered and the tail would spin round and round, like a maple seed. It turns out the real one was a horses-ass as well! Really, I admit the crashes WERE hysterical. I may put Shemp Howard in the cockpit. I was also wondering what the purpose of the fences on the wings was all about. It turns out that they were there to keep the airflow from slipping off the wings...which the ailerons could not handle anyway. The controls must have been pretty stiff, and Yeager himself said flying the thing was a very challenging experience. I know this from fooling with the model, it is extremely unhappy at low speeds, and really manic at high speeds, but still more fun than a barrel of monkeys. Bring lots of beer and adult refreshments to the field when you go fly yours.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 14, 2016, 03:10:10 PM
. Here are some pics I took from the Tico Airshow in Titusville last year. This one must have been a trainer version. A guy there said it was not operational, but that nobody would be nuts enough to try flying it anyway.


Title: Re: Don Srull Mig -15
Post by: Pat Daily on February 15, 2016, 03:48:40 PM
Crabby

I sent a link to this thread to Don Srull.   Here was his response to me today.

Thanks, Pat. I have to join this forum - these guys know how to have FUN!! They know the magic competition formula - "have the most fun, and help the other guy have even more."
Maybe sharing a few mistakes I made on my MIGs could help. I love those color schemes they have found.
Don


Title: Re: Don Srull Mig -15
Post by: Pops on February 15, 2016, 07:41:39 PM
Crabby

I sent a link to this thread to Don Srull.   Here was his response to me today.

Thanks, Pat. I have to join this forum - these guys know how to have FUN!! They know the magic competition formula - "have the most fun, and help the other guy have even more."
Maybe sharing a few mistakes I made on my MIGs could help. I love those color schemes they have found.
Don

(Now, where's the "Like" button for that post?) :)


Title: Re: Don Srull Mig -15
Post by: Crabby on February 15, 2016, 08:06:59 PM
Hey Pops and Pat! Thanks for showing up here now and again... Pat, I am an old Don Srull fan I never met him in person but he reminds me in a way of my Olde Man Millard who was an accomplished Florida watercolorist (RIP), and a damn good balsa butcher as well. I hope he joins the forum! Pops it just gets funner and funner when these old timers chime in! You know, my heroes are guys like George Perryman, Henry Struck, Walt Mooney, Bill Hannan, Ray Malmstrom, Earl Stahl, Florent Baecke, Don Srull, and of course Thee Olde Mann.... Millard Wells my dad!  some guys get baseballs signed by Ted Williams I get my models signed by guys I admire....


Title: Re: Don Srull Mig -15
Post by: Pat Daily on February 15, 2016, 08:15:50 PM
Earl was a real gentleman and used to come to Maxecuter contests in central VA and DC for many years.  What a nice man.  And he really designed great models!


Title: Re: Don Srull Mig -15
Post by: Pat Daily on February 16, 2016, 01:34:09 PM
Here  are two models of Migs using Don Srull plans.  The rubber powered on is by Wally Farrell and the ducted fan by Ralph Smalley.  Pretty planes.


Title: Re: Don Srull Mig -15
Post by: Crabby on February 16, 2016, 02:47:43 PM
Yeah Pat pretty planes!   I see Wally needed tail ballast...I needed it too...plus I had a adjustable rudder/stab, and found out that having the tail jacked up quite a bit was a necessity! Thanks for the pics! I have a couple models on the bucket list, but someday I might try the electric ducted fan do you recall Ralph's plane's flight characteristics?


Title: Re: Don Srull Mig -15
Post by: Pat Daily on February 16, 2016, 02:51:46 PM
Ralph's plane (and Don's) for electric ducted fan flew fine until they stalled and then went in like lawn darts.  They seem a bit sensitive to a stall.

Pat


Title: Re: Don Srull Mig -15
Post by: Crabby on February 16, 2016, 03:34:50 PM
Well that seems to be the reason for mine acting up. I saw a floater built by Dick Baxter at USIC (Johnson City TN) his made nice docile circles way up there. Mine would do no such thing, but he is Dick Baxter! I finally got steamed up, cranked in a big fat hunk of rubber, then wound up and threw it like a baseball...mostly just to vent off a little aggression, and the thing flew like a summer sparrow. It flew at a scale Mach 5, and even had a little glide left over. But let it climb at anything like a steep angle and it stalled and turned into a lawn dart. Only redeeming factor was as least it was comical.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 16, 2016, 08:33:12 PM
I know this isn't Don's Mig 15 but it blows me away that this can be built and fly so well...  Japanese Mig15  (https://www.youtube.com/watch?v=PSWVOkaLaPs&feature=player_detailpage)
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: tom arnold on February 16, 2016, 11:37:09 PM
What is interesting too is that at the end of the flight, the little Mig looks like it has, not one, but two little stalls with a quick recovery both times. I wonder if the airfoil has something to do with it. This is the only rubber-powered ducted fan Mig that actually climbs and flys I have ever seen. There is another video on Youtube that shows an attempt with the same design:        https://www.youtube.com/watch?v=aCmsfRtm6EI      but all he gets is a powered glide. This is a tough act to follow.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 18, 2016, 01:09:59 AM
Tom...I saw the stalls also.  But looking closely at the wings I didn't see any wing fences.  The Japanese model has a thrust vector in the exhaust outlet also.  Very inspiring video of that aircraft.  Got my plan for the Srull Mig printed at 27" span.  Hope to start this weekend.  

I think this is the airfoil for the Japanese Mig 15
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on February 19, 2016, 11:58:11 AM
I know this isn't Don's Mig 15 but it blows me away that this can be built and fly so well...
Sky9pilot
I have seen this one, and am familiar with the work of Kaz Suzuki...he is no one to compare with...Jiro Sugimoto is another one. They are one a level that exceeds my desires as a common balsa butcher. Don McClellan on the other hand did a very admirable job of a Mig with a rubber ducted fan...he has way more lead in his pencil than I do! ;D ??? :P


Title: Re: Don Srull Mig -15
Post by: tom arnold on February 19, 2016, 06:17:09 PM
I had a modeling friend who traveled to Japan often, spoke the language and who attended some of the meets and fun flys you see in the videos. After seeing those exquisite little flying machines, he declared the motto of the Japanese modelers should be "Anything worth doing is worth doing to excess".


Title: Re: Don Srull Mig -15
Post by: Copbait73 on February 19, 2016, 09:06:26 PM
Tom...I saw the stalls also.  But looking closely at the wings I didn't see any wing fences.  The Japanese model has a thrust vector in the exhaust outlet also.  Very inspiring video of that aircraft.  Got my plan for the Srull Mig printed at 27" span.  Hope to start this weekend.  

I think this is the airfoil for the Japanese Mig 15
Sky9pilot
That is a very large jet at 27" wingspan


Title: Re: Don Srull Mig -15
Post by: Crabby on February 19, 2016, 09:11:35 PM
That plan was set up for an electric powered ducted fan....


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 19, 2016, 09:38:33 PM
That plan was set up for an electric powered ducted fan....

The Japanese plan was for a rubber powered ducted fan... Click Here  (http://www.hippocketaeronautics.com/hpa_forum/index.php?topic=7692.700) check out the cookup here. Especially reply #3
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on February 20, 2016, 02:35:40 PM
Here are some pics of a perfectly imperfect Mig-15... I am happily unhappy with this thing! this is the "carrot" in my golden ring on & on...next to take her out for a date out in the tall grass, and see if she can spin like her older sister did.... Oh there is a Walter Mitty in the pilots seat BTW


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 20, 2016, 04:48:20 PM
Looks great Crabby... is the vertical stab left with the gap to the fuselage for adjustments of the horizontal stab's incidence?
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on February 20, 2016, 05:11:04 PM
https://www.youtube.com/watch?v=LwGdulf61wM

yeah Sky 9 you got it...I am certain I am gonna need to fiddle with the rear end some once we get rubbered up. Here is a test glide...


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on February 20, 2016, 07:19:44 PM
Great looking glide there Crabby!  You just may have a floater on your hands!!!  Very Nice!
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on March 03, 2016, 09:11:39 PM
I took the magazine scan of the Srull Mig 15 and used my CAD to redraw and blow it up to 27".  I decided to use reed for the fuselage formers and will do some reinforcement around the wing root area.  I'm using a carbon fiber arrow shaft as a jig to skewer the foam board patterns with the reed on them.  I've used 1/16" SQ stringers for keels on the dorsal, ventral and two horizontal keels each side.  The remainder stringers will be 1/16"X 1/32" balsa.  I made a foam jig to hold the arrow shaft while attaching the stringers.  I'll fill the two nose bays with soft balsa for some strength in this area and at the wing roots.  I also plan to fill the fuselage on each side at the trailing edge of the wing to hold for launching.  After attaching almost twenty stringers I took a break, will finish later tomorrow. 

I'm posting here rather than start a new thread Crabby...hope it's ok.  I'll start my own thread if you prefer! Here's a few pics...
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on March 08, 2016, 11:38:34 PM
Got the stringers on the fuselage and some cross member trusses in the fuselage.  The two wing panels, one sanded.  started the planking on the nose. Whew...that's going to be a job!  Got the noseblock attached. 
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on March 09, 2016, 12:00:34 AM
Keep it rolling Sky 9...looking great!


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on March 21, 2016, 09:48:49 PM
Got tired of planking so I built the empennage.  Here's a few pics of the mockup.  Still a lot of planking to finish on the fuselage.  But I like the empennage so far!
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on April 06, 2016, 07:51:57 PM
Well my building mojo has returned and I got the planking and sanding of the nose of the fuselage done.  I also added the exhaust fairing under the vertical stab. Which after reviewing pictures of the actual aircraft will need some trimming.  I can see from the pictures I also need some additional washout in the wingtips.  Here's the pictures of the latest progress.
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on April 15, 2016, 01:22:54 AM
Got some tissue on the bones.  But was too lazy to cleanup the board.  Please pardon the mess. 
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: rgroener on April 15, 2016, 03:02:22 AM
Tom, what a great looking Mig15.
The covering looks very clean, congratulation ;D
Looking forward to see the bird in its colours.

Roman


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on April 19, 2016, 08:23:45 PM
Made some more progress today...covering is done and the wings got attached today along with the vertical stab.  I won't mount the horizontal stab till it's painted and panel lines are added.  Much easier that way.  Got the gun blisters for the canon and machine guns done and mounted.  Sealed with thinned white glue.  Will sand and give a second coat to seal them before painting.  I've decided to go with a silver and red scheme also but a bit different from Crabby's.

Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 06, 2016, 12:06:12 AM
Finally got my mojo back and started to make some progress on the Mig... so here's some shots of the silver paint applied.  I should have covered it in black tissue.  The silver would have covered better.  I'll let her dry for a day and then the red will go on. 
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Don McLellan on May 06, 2016, 12:48:07 AM
Hi Sky,

Exceptional bones and tissue Tom, with very nice silver paint!!  Looking forward to the application of red.

Don


Title: Re: Don Srull Mig -15
Post by: dputt7 on May 06, 2016, 09:07:12 AM
        Neat Tom, very nice!


Title: Re: Don Srull Mig -15
Post by: Crabby on May 06, 2016, 09:13:35 AM
Lifting tail is probably a great idea! Silver looks good... I covered mine in black as an experiment, I have seen others do that, no matter which way you go, it takes a shot and a beer to steady the nerves! Mine came out pretty well as long as I stay with my promise to always love imperfection!


Title: Re: Don Srull Mig -15
Post by: USch on May 06, 2016, 10:55:00 AM
Hi Crabby and Don, excellent modelling here  ::)
 
On my Hughes I did two test samples with black and dark blue Esaki underneath. Dark blue is giving an even better appearance once sprayed with silver.

But how does your paint stick to the tissue? Mine is extremely delicate, if I put a piece of masking tape on it, it peels off the paint. The Esaki was given two coats of dope before spraying. How does yours behave ???

Urs


Title: Re: Don Srull Mig -15
Post by: Copbait73 on May 06, 2016, 05:23:55 PM
What brand and number silver did you shot.
I've never had luck putting tape on silver so it is typically the last color to go on. I usually shoot Model Master airbrushed with lacquer thinner. Also use DuPont high temperature thinner for airbrushing.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 06, 2016, 08:59:15 PM
Thanks fellas...the silver I'm using is Krylon Metallic Shimmer, the number is 2338 Nickle Shimmer.  I finished the Esaki tissue with EzeDope spritzed (30/70 water/EzeDope) after applied with gluestick.  Once that was dry I applied two additional coats of EzeDope thinned 50/50 water/EzeDope with a brush.  Tip...do not shake up the EzeDope the bubbles will ruin the finish.  If you do shake it, let it settle till the bubbles dissipate.  I let this dry 24 hrs between coats. 

I painted the silver and let it dry for a day and a half.  I've applied masking tape and it's handled the tape very well.  Peals off without disturbing the paint.

Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 07, 2016, 12:18:02 AM
Masked and sprayed the red today.  The green Frog Tape worked well and almost no bleed under on the masking and no paint was pulled off when the tape was removed.  I'm very pleased.  Still have a lot of work to do,  started the canopy plug today.
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Wout Moerman on May 07, 2016, 04:40:33 AM
Definitely red! Looks great. And red ....


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 10, 2016, 10:35:32 PM
Thanks Wout...it is red!  I've found that either white or silver under red makes it pop!

Started on the cockpit detailing with a armor plate, seat back and ejection rail and part of the sliding canopy detail.  I finished the canopy plug and after a couple tries finally got a decent canopy. It isn't attached yet still some work to do on the cockpit.  Made a foam pilot's head with goggles.  From what I could see they wore leather caps instead of helmets.  Had to deal with some hanger rash, poked a hole in the bottom of the right wing so a bit of white glue and saran wrap stretched over the hole to patch the small tear.  Here's the latest pictures.
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Don McLellan on May 10, 2016, 10:51:40 PM
Looks great Sky.  The red really does 'pop'! 


Title: Re: Don Srull Mig -15
Post by: Glenn (gravitywell) Reach on May 11, 2016, 02:53:52 AM
I've never been a fan of jets (like the man said, jets are like hookers.....neither has any visible means of support!) but this one is a real beauty!  Excellent looking ship.  Waiting to see some videos of her flying.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 12, 2016, 09:40:52 PM
Well almost finished now.  Still have to add the wing fences and make a clear prop for her.  I've also decided to use weed wacker line of the proper thickness to simulate the gun barrels.  Just so a nose plant won't cause too much damage and won't hurt anyone if it happened to hit (me) them in the trimming.  Safety first ;D ;)
Finished the detailing of the cockpit and gun sight.  Framing added with painted tissue. Panel lines added with ultra fine Sharpie.  I used several patterns for the various panels and access panels on the plane.  Here's the latest pictures. 
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Don McLellan on May 12, 2016, 10:33:24 PM
Very impressive work with the ink pen Sky!!  

Just wondering, how long did the ink take to dry on the silver paint?  Once upon a long time ago I tried printing panel lines on silver Esaki, and struggled with smearing/drying time.

And have to say, once again, very, very nice model.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 12, 2016, 10:58:28 PM
Thanks Don,
The ink dried very quickly on the silver paint.  Had no problem with smearing or drying time.  Almost finished with the fiddly bits!
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 13, 2016, 05:25:36 PM
Well I got my order in yesterday and opened it today.  Everything was there, except I ordered aluminum rod instead of tube...so another order will be placed, to build the prop.  Got the clear blades cut from the cheese ball container.  Will be approximately a 9.5 inch prop, we'll see just how large the prop hub will be. 

Completed the wing fences out of foam picnic plate.  The Krylon Red is not compatible with the foam plate.  So mixed some acrylic paint to match as best I could along with some acrylic bright silver paint to finish off the fences.  They were attached with diluted Aleen's Tacky Glue.  The same used to mount the canopy.  Dries clear.  I found some very closed cell foam sheets at the Dollar store  and I cut a couple strips and doubled it over and glued them with Tacky Glue and let that dry.  I sanded off the square edges into round foam rods and they are very flexible yet hold a pretty straight line for gun barrels.  I then painted them gun metal silver/grey acrylic.  This way no one will be hurt, including me by hard gun barrels.  ;D ;) 8) ::)

Got the nose numbers made from printed bond paper cut out leaving the white border around the black numbers. 

So I'm calling this one done.  I will be making a retaining block to hole the aluminum tube motor anchor on the exhaust end of the fuselage allowing a full length motor through the fuselage. 

Sky9pilot


Title: Re: Don Srull Mig -15
Post by: rgroener on May 16, 2016, 11:34:25 AM
Wow, Tom...
I like your building style anyway, but somehow, this new Mig-15 model looks especially good.
The colours are crisp and as stated above, the panel lines are very clean. Very well done!
Good luck with the flying, keep us updated. Did you try to glide it yet?
If a plane looks good, it most certainly will fly good :)

Roman


Title: Re: Don Srull Mig -15
Post by: skyraider on May 16, 2016, 12:52:28 PM
Nice MIG, Tom!  Well done and I especially like the color scheme.
Not often do we see red migs. Just so cool.

Skyraider


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on May 16, 2016, 05:58:11 PM
Thanks Roman and Skyraider...still working on balance it seems very close without need for any ballast so far.  Still waiting on some brass tubing to construct the prop hub.  Hope to get some air under her wing soon.
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on September 14, 2016, 10:31:23 AM
I am finally getting my inactive airforce ready to fly on Saturday...I am a "tryer" of many good and bad ideas. Here is one good idea. The stiff white or blue crate packing foam I don't know what its called but its probably something like Polypropy&&%%^&^##@@6whatever, makes a great nose block entry for a fuse. Its light, cuts perfectly, and has terrible memory! It will push into tight areas and expand. Always stays tight, never comes loose  Here are two. The round one is for my Mig-15 the square on goes into the Staggerwink...That one has been in there for like 4 years. I glue it to the back of 1/4 balsa with RC-56 and it doesn't ever come off. Because of its sponginess shims are easy to add for down/side thrust.


Title: Re: Don Srull Mig -15
Post by: Crabby on September 18, 2016, 04:16:22 PM
I had a great day of flying Saturday, And the Mig was a puzzle... but by day's end I had it doing consistent 1:30-1:45 min flights....
I used a loop of 3/16 about 1.5X the distance from peg to hook, And I had my memory jogged: this thing insists on upthrust, and a an up trim tab on the LE tip...really insists on a tight LH turn. The climb was astonishing, with a short period of chaos followed by a climbing LH turn. Very nice glide on the way down. I am sure this plane will usually need to be trimmed for the day you fly it. Here how it looks after trimming all day!


Title: Re: Don Srull Mig -15
Post by: Crabby on September 19, 2016, 08:17:54 AM
Sky9pilot: This plane, like its older little sister, was set up with wing incidence per the Srull plan and the stab Crabbyized so I could adjust the incidence. Washed out both tips. On the maiden flight, I wound in 1000 turns, did the fastball pitch and got one great flight of about 1-1:15 or so, with a spectacular climb. After that, all I could get was a ^%$#ing dork dive into the turf. I checked everything and nothing seemed to have changed. I fought this little pain in the "A" for about an hour, then gave up and flew other stuff. I came back to it in a better mood after my Sparky and Beech Staggerwing cheered me up. That's when it hit me: upthrust. It is counter-intuitive to me to have the stab so jacked up and then need up thrust too, so I don't naturally go there, but its one of the things I did to the other one. That's when this little Mig began to fly right. The tight ass left turn was held in check by a trim tab on the left wing. next time out I will RH thrust and maybe get rid of that tab. But the beer tasted sweet not bitter by the end of the day, and I could have spent another few hours playing with this little contraption. OH BTW: Once the power ran out (1100 winds of one loop of 3/16) the glide was nice and flat.
BUT in summary: it you can't get your Mig to fly in a spectacular satisfying way, try some upthrust. You should get a steep climbing LH turn. Pics and vids to follow soon.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on September 19, 2016, 04:32:25 PM
Thanks Crabby...got sidetracked by another project.  But with the inspiration of your Mig I'm finishing the prop ASAP. 
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Ray_K on September 19, 2016, 06:54:48 PM
9-19-2016

Wow Tom,

I love the Mig, that red really pops, it should not be to hard to find, great craftsmenship! I never build a jet before, I am thinking about doing a thunderscreech.

Cheers, Ray K.


Title: Re: Don Srull Mig -15
Post by: Ray_K on September 19, 2016, 07:16:56 PM
9-16-2016

I think I can modify the Republic Thunderflash plans to do this.

Cheers, Ray K.


Title: Re: Don Srull Mig -15
Post by: Ki44LvR on September 19, 2016, 08:05:31 PM
Wow Crabby, I'm amazed you got your little Mig to fly for so long! Wonderful job with the finishing too - looks great hanging on the wall. Sky9pilot's is equally as nice and am looking forward to seeing pics of them in the air. Funny, I never considered a jet before - always thought that they wouldn't fly well. Certainly opens up another avenue for future models. Now my mind is stuck in overdrive!

Jeremy.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on September 20, 2016, 05:18:27 PM
Thanks fellas...Ray, Steve Bage's RF-84 plan supliment toMike's F-84F on Mike Stewart's site is a very good start for the Thunderscreech!  I used it to make one several years ago that was destroyed by grandsons before it could be trimmed to fly.  Give it a go... Click Here  (http://www.ffscale.co.uk/f84.htm)
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Ray_K on September 20, 2016, 07:09:46 PM
9-20-2016

Thanks Tom,

As time permits I will give it a go.

Cheers, Ray K.


Title: Re: Don Srull Mig -15
Post by: Crabby on October 01, 2016, 09:26:16 AM
Just a few pics of the Mig being launched into perfectly stellar conditions...I hope to get video next time out...After getting her dialed in she was a steady performer, climbing to great altitude, and then circling in a nice sober manner not at all like her screaming pistachio sister, either one is a blast to fly. I forgot my rubber stripper and settled for one loop of 3/16. I think it could be powered back a bit but it is a jet and is set up for speed.


Title: Re: Don Srull Mig -15
Post by: Sky9pilot on October 02, 2016, 12:41:32 AM
Crabby,
so jealous of your flying site!!!!  She looks great, nice launch form!
Sky9pilot


Title: Re: Don Srull Mig -15
Post by: Crabby on October 02, 2016, 03:04:15 PM
Hi sky 9 yep this place is less than 10 minutes away! Plus every year they hold the King Orange there. What it all means to me is that there is always someone there to share in the flying! There is no reason to partake in this game unless you can share it with others. You may as well snuggle up with a bottle if you can't share your moments with someone!