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Author Topic: Herr Engineering DVII to RC  (Read 576 times)
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steveneill
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« on: July 11, 2019, 10:46:00 AM »

This will take awhile as I have many projects at my studio but at least it's upstairs laid out on the board with all components ready to build.

I ordered the kit directly from Sig and as in the past they were very responsive and got the kit right out to me even though I wasn't in a hurry. These people actually right to you personally and tell you what's going on with your order. Amazing. There are several companies RC and Free Flight that do this, Volare Products comes to mind and some of the other cottage industries here.

I'm using a Rimfire 250 I had laying around, 4 HS 55s and a 2 cell 450 for the guts. I have a spectrum RX as well. Should be a good combo for this 25 inch span bird. It has a roomy fuse.

It will have ailerons, rudder and elevator. Removable wings for transporting and possible repairs. Servo for both ailerons.

I plan to add lots of scale details such as the radiator grill and a detailed cockpit.

The reason I decided to RC this plane is so I have something to fly indoor and outdoor anywhere I can find a parking lot or patch of dirt or grass. Where I live there aren't any RC fields or good FF fields close to me without taking a good long drive.

The kit is outstanding and the laser cut parts just fall out of the wood. It comes with red and black tissue but I'm going to take the plunge and print my own Lozenge on Esaki tissue. George Bredehoft has been helpful in pointing in the right direction, thanks George

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0787.jpg

The kit showed up in 3 days well packed and in shrink rap.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0788_1.jpg

Opening it up was a delight of well packed plans and parts.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0789.jpg

Twp sheets of plans. Very old school. I like it.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0790.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0792.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0796.jpg

Machine guns parts.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0797.jpg

Very good selection of wood I don't need to replace anything

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0798.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0800.jpg

Rimfire fits good.
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
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OZPAF
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« Reply #1 on: July 11, 2019, 08:08:28 PM »

That would be a nice model Steve. I guess you are considering flying it rudder/ elevator/ throttle which should work well. I'm a little surprised though that you are using HS55's as although they are good servos - they may be a little heavy.

Everything else looks Ok to my eyes anyway.

I fly a 36" EFlite Piper LA4 on 3g servos although I have 4 in the model. It also uses a 2s400 and the recommended EFlite Park 250. It weighs around 10oz ready to fly

These are the servos I used
 https://www.hyperflight.co.uk/products.asp?code=BMS-101AMG&name=blue-bird-bms-101amg-servo-1kg-cm-0-07s-4-5g-7-6mm.

Happy flying.

John
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steveneill
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« Reply #2 on: July 12, 2019, 10:21:16 AM »

Actually I wrote that I will have ailerons too. I'm taking the dihedral out. This is all based on a previous successful build by a gentleman in Austria who posted a thread on RC groups: https://www.rcgroups.com/forums/showthread.php?1285823-Fokker-D-VII-%28Herr-Engineering%29-Conversion  I'm building mine the same and the HS-55 ingeneral I use for planes in the 24-36 inch span.

I should be fine. Thanks for you input OZPAF!
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Konrad
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« Reply #3 on: July 12, 2019, 10:49:51 AM »

I've done a lot of these gummy band to RC convertions. As a general rule I like to add over-sized ailerons. This allows me to use less deflection to get the roll I need. These small ships really do present a lot of adverse yaw. I also make these full house and couple the rudder to help address adverse yaw. I think you will want  3 axis control. I think I go into a bit of detail on this in my Dumas P6-E and Guillow Champ threads.

https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=11737.0
https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=16387.0

Some general notes;
https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=12443.0


All the best,
Konrad
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Cut it twice and it's still too short!
steveneill
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« Reply #4 on: July 12, 2019, 11:02:20 AM »

Thanks Konrad!
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steveneill
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« Reply #5 on: July 18, 2019, 12:56:54 AM »

A little progress. Only a couple of hours but I tell you this Herr kit just builds itself.

I'm using the balsa cowl as a vacuum form plug and tomorrow I'll point it up and add scribes to define the radiator.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0854.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0855.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0857.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0863.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0864.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0866.jpg
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
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flydean1
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« Reply #6 on: July 18, 2019, 09:28:11 AM »

I would move the rear rubber peg up one set of uprights.  Of course, if you are going the rc (never capitalize  Wink) route, it doesn't matter.
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steveneill
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« Reply #7 on: July 18, 2019, 10:23:19 AM »

Yes rc. Wink I have plenty of FF to maiden and trim when we get our flying site. So I'm making a few rc versions to fly in a few places I have locally. Of course the sites are public and signs say "No drones" but this is not a drone;)  During the week there are no people there.
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« Reply #8 on: July 18, 2019, 12:04:33 PM »

Understood.  I'm contemplating an E-36 with rcdt as a fall build so I have something to play with in a small field near here.
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steveneill
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« Reply #9 on: July 18, 2019, 12:12:26 PM »

Makes sense the best of both worlds in a small field. Brilliant.

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steveneill
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« Reply #10 on: July 19, 2019, 12:45:08 AM »

I got that vacuum formed cowl made today. All I did was take the balsa cowl they have you make and I scored deep panel lines into it with a standard ballpoint pen. Vacuum formed it and cut out the radiator area and filled it in from behind with a bit if insect screen.

I got the tail feathers made and I'm just starting the loser wing.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0872.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0873.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0874.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0876.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0877.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0879.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0880.jpg
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
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flydean1
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« Reply #11 on: July 19, 2019, 07:45:48 AM »

Have you decided on a color scheme?  The Hermann Goering DVII was all white.  That was back when he could still fit in a fighter. Grin Grin
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steveneill
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« Reply #12 on: July 19, 2019, 11:03:47 AM »

You know that would sure make for an easy finish. I planed to print my own tissue but now you got me thinking. Wink
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steveneill
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« Reply #13 on: July 21, 2019, 01:15:23 AM »

Wing is removable, both will be. Managed to build both wings and started on the cabanes. They are tacked on so once in the right position and angle to the wing I can remove them. After which I'll make them stronger and add some wire to lock them into the fuse.

I just have the top wing propped up for a look.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0887.jpg
Added some additional balsa to make the ailerons then cut them away.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0888.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0891.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0889.jpg

Having lots of fun with this build. After this I have a Peter Rake DVIII kit with a 30 inch span. Wink
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
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LASTWOODSMAN
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« Reply #14 on: July 21, 2019, 03:22:07 AM »

     Hi steveneill.   I am following your D7 build closely, as I have built this one, but have not flown it Free Flight rubber yet.  I am interested if and how you are strengthening up the landing gear.  The gear struts and wing struts are "butt glued" to the fuse as per plan.    This does not hold, as I broke them off on the first glide toss.    There are no "built in" pockets on the fuse for these strut ends to locate in.    The wings have good pickets for those ends of the struts, though.   I actually did put in dihedral into the wings as per kit plan - I must say it appears hardly noticeable ... -  mine is for Free Flight rubber though.  I am looking forward to the rest of your build.

LASTWOODSMAN
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« Last Edit: July 21, 2019, 03:46:31 AM by LASTWOODSMAN » Logged

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
steveneill
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« Reply #15 on: July 21, 2019, 11:47:30 AM »

The struts will be wired reinforced. I have been using an old build located here: https://www.rcgroups.com/forums/showthread.php?1285823-Fokker-D-VII-%28Herr-Engineering%29-Conversion

Look through the thread and you'll see lots of solutions he came up with that make sense although I want to better secure the cabanes. I may reinforce where they attach to the fuse.

Trust me I love FF but have nowhere to fly FF without and hourt to three hour drive. Where I live that makes things difficult.

In the two pictures you can see the music wire and in the finished gear picture you can see he wrapped it in thread for extra strength. The axle wing and gear are held in with rubber bands in case of a hard landing they will pop off.



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steveneill
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« Reply #16 on: July 26, 2019, 11:07:55 AM »

Without a doubt and as much modeling as I have done over my many years getting these cabane struts to line up at all angles and heights was a pain in the butt. Took two tries before I got it correct and true. Strut material I replaced with some hardyer since the top wing and bottom are removable and nylon bolt on.

I plan not to remove them for covering but would rather cover around them. Plus I plan to shape them a bit ti an airfoil shape. They are very light and strong. Now can I please move on to the fun stuff?

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0927.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0923.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0922.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0921.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-0919.jpg
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
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Konrad
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« Reply #17 on: July 26, 2019, 01:49:13 PM »

I find it all but impossible to get the wings, the ends of the struts, wings aligned and have good contact to make good butt glue joints.
Have you tried the lap joint method? I use a fixture and let the ends of the struts end up where they may as long as the wings are in their correct orientation.
https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=11737.msg79573#msg79573
https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=12443.msg87688#msg87688

All the best,
Konrad
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Konrad
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« Reply #18 on: July 26, 2019, 04:31:29 PM »

Sorry, I now see that you are trying to make removable wings. I think much the same process can be used, but the threaded bock a pass through hoop do add a lot of complexity.

All the best,
Konrad
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steveneill
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« Reply #19 on: August 03, 2019, 11:53:38 AM »

Thank you Konrad.

A bit more progress. All servos are mounted. I had these tiny servos that worked great for the ailerons. Now begins the process of adding small goldenrod cables for the tailfeathers and linkages for the ailerons, hinging and all that stuff.

Still quite light with more than enough power.

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-1065.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-1064.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-1042.jpg

https://i94.photobucket.com/albums/l114/U-812/Fokker%20DVII%20Herr%20RC%20conversion/IMG-1041.jpg
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
Herr Engineering DVII to RC
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Konrad
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Measure twice cut once



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« Reply #20 on: August 03, 2019, 12:20:45 PM »

At this scale I've had good luck with 1.5 to 2mm unsuported carbon push rods. I also get good results with pull pull for the rudder.

All the best,
Konrad
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Cut it twice and it's still too short!
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