Hip Pocket Builders' Forum

Outdoor Free Flight Forum => Free Flight Scale => Topic started by: Dan Snow on August 23, 2019, 08:31:32 AM



Title: DPC Models 16" Junkers D1
Post by: Dan Snow on August 23, 2019, 08:31:32 AM
The last couple of months I have slowly been working on the 16" Junkers D1 from DPC Models.  The work has been slow due to many, many major projects going on here at home. Everything from tree removal, fence replacement, to a new kitchen floor early next month. Thanks to an unexpectedly generous inheritance from my Mom we can do some much needed repair and renovation on our 31 year old house.

But enough of that, on to the build so far. And Pictures!!!

Pic #1 - The bits of the kit. Daves usual excellent laser cutting, light balsa and clear plans and parts ID sheet.
Pic #2 - Sheet one of the plans.
Pic #3 - Sheet two of the plans.
Pic #4 - The parts ID sheet.
Pic #5 - Building the stab on the mag board.
Pic #6 - The stab and rudder on the mag board.

Nice and easy build so far.


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on August 23, 2019, 08:43:30 AM
Next installment. As I stated I've been puttering along on this for a few weeks. Partially because of the other projects, but also because of the heat here in California's central valley. No AC in the shop so I only have a couple hours in the morning to get anything done.

Pic#1 - The stab and rudder all framed up.
Pic #2 - The outer wing panels done.
Pic #3 - The wing root sections built.
Pic #4 - The pieces of the wing laid out on the plan.
Pic #5 - The landing gear struts. I might add a 1/32" gusset on the joint.
Pic #6 - The first fuselage side framed up.

Coming up The joys of the fuselage alignment!!


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on August 23, 2019, 09:04:06 AM
Okay, this episode will chronicle my attempts to get the fuselage sides aligned so I could add the formers.

Pic #1 - My first attempt using the mag board. I could get the sides aligned, but every time I touched them something moved. I tried several different arrangements of magnets but wasn't satidsfied that I would get a good result.
Pic #2 - Decided to try using a cradle made from 5/32" foam board. Once I got the sizes right and the centerline marked I glued everything together.
Pic #3 thru #5 - Various shots of the sides in the cradle as I added the top formers.
Pic #5 - The fuselage with all the formers in place. I'm happy with the straightness.

And yes, I moved the rear pin forward!! :) :) :) :)

This brings up to date my progress on this project.  Things are finally calming down a bit so hopefully I can get more than a couple hours a week on it. Next up is getting the stringers on the fuselage.


Title: Re: DPC Models 16" Junkers D1
Post by: LASTWOODSMAN on August 23, 2019, 09:28:44 AM
     Hi Dan!   Great to see you back.   :)    Your  16"  Junkers   looks great so far.   :o   And that is an excellent jig setup.    8)    It looks like there is going to be no guesswork for the wing incidence,  what with those nicely laser cut square holes, in the wing mounting plates on the fuse,  that locate the square wing spars. 

LASTWOODSMAN
Richard


Title: Re: DPC Models 16" Junkers D1
Post by: Don McLellan on August 23, 2019, 11:59:49 AM
Nice work Dan, and I like the fuse jig.


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on August 24, 2019, 03:24:46 PM
Temps in the low 70's this morning, able to get a little work done before it got hot.

Pic #1 - Gluing the outer and root wing sections together.
Pic #2 - #4 - Various shots of the fuselage with the stringers in place. The tail section on top was a little bit of a head scratcher but got it figured out.



Title: Re: DPC Models 16" Junkers D1
Post by: dohrmc on August 25, 2019, 11:07:45 PM
Nice job, you will like the airplane.


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on September 04, 2019, 09:34:27 AM
Very little progress over the last week, more house stuff getting in the way. Today they start replacing our kitchen floor so we get to look forward to eating out every meal for the next four days!!

I did start drawing the lines on the tissue to simulate the corrugations, and boy is that a tedious task. But I think it'll look pretty cool when I finish.  I usually spend 15-20 min at a time. Longer than that and I start to rush a bit.

Still have to do another piece of green for the fuselage and top wing surfaces.


Title: Re: DPC Models 16" Junkers D1
Post by: Crabby on September 04, 2019, 11:17:29 AM
I forgot whether or not you had a printer.


Title: Re: DPC Models 16" Junkers D1
Post by: dohrmc on September 05, 2019, 09:50:37 AM
Old School!  I like it!


Title: Re: DPC Models 16" Junkers D1
Post by: fred on September 05, 2019, 11:43:09 AM
Nice work..  at 16" that's a large Peanut then ;)
DPC still makes you print your own plan(s)?


Title: Re: DPC Models 16" Junkers D1
Post by: skyraider on September 05, 2019, 12:53:05 PM
Quote
DPC still makes you print your own plan(s)?

This Junkers comes with plans.

Skyraider


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on September 16, 2019, 07:56:55 AM
After a brutal week+ dealing with getting a new kitchen floor installed, then assembling two new kitchen cabinets there is a smidgen of light appearing in the tunnel. Need to re-arrange things from the old to the new, but that can be done a little at a time.

So hopefully sometime this week I can get my work area in the garage back and resume work on the D1. I need to finish drawing lines on the tissue so I can start covering. I have the wheels and the machine guns partially constructed, and have started to laminate the landing gear struts.


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 08, 2019, 07:48:07 PM
Was finally able to find my workspace again and get some work done on the D1…

Had a real Doh!!! Moment. After spending a couple of hours to get the lines hand drawn on the tan tissue, I was faced with an even longer session for the olive. Then my senior braincell had a spark and it occured to me. I googled horizontal lines, copied them into a word document and sent them to my printer. Boy did I feel dumb!!

Anyway, now have the bits covered, a little touch up and then I can start adding the sorta scale bits


Title: Re: DPC Models 16" Junkers D1
Post by: RolandD6 on October 08, 2019, 07:55:38 PM
Neat

I would not have considered Googling for parallel lines. I would have drawn them in TurboCad and then have had to fool around with line thickness and so on.

Paul


Title: Re: DPC Models 16" Junkers D1
Post by: OZPAF on October 09, 2019, 09:58:36 PM
Nice work Dan - googling for parallel lines? I would have done the same as Paul - used CAD. It just shows how the brain can miss simplicity even when it is in front of your nose :)
The beauty of reading other builds - there is always something to learn.
John


Title: Re: DPC Models 16" Junkers D1
Post by: kkphantom on October 10, 2019, 05:24:39 AM
How did we ever get by without google?


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 10, 2019, 08:01:18 AM
Actually I misspoke, I used Duck, Duck, Go instead of google, but that's another story.

Did a bit more yesterday. Got the fuselage covered, engine mounted and nose block covered. It's rough, but from 5' or more away isn't so bad! :) :) :)

Another senior moment: I Very Carefully lined up the tail skid, checked the dimensions twice, and then ........ Glued the sucker to the TOP of the fuselage. Luckily realized it and removed it before the glue set. Sheesh!

Still have work to do on the landing gear, wheels and machine guns.

Pic #1: The fuselage with engine bits in place
Pic #2: The nose block in place
Pic #3: The tailskid, this time mounted where it's supposed to go!
Pic #4: The bits I still need to work on


Title: Re: DPC Models 16" Junkers D1
Post by: OZPAF on October 14, 2019, 12:56:41 AM
Almost there Dan. The covering looks impressive - the colour and the lines for the corrugations.

John


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 15, 2019, 07:09:33 AM
I got the markings on, like the way they look.  I'm trying to make the lift handles for the fuselage but those tiny suckers are not co-operating at all!!


Title: Re: DPC Models 16" Junkers D1
Post by: skyraider on October 15, 2019, 11:35:10 AM
Dan,
  Might I suggest using a piece of broom straw for the lift handles. May need to be split
depending on how wide the straw is. You'll probably need tweezers for assembly but well
worth the effort when completed.

Skyraider


Title: Re: DPC Models 16" Junkers D1
Post by: ZK-AUD on October 15, 2019, 09:21:54 PM
You should be able to find a range of thin styrene rod (Evergreen or similar) in your hobby shop - just wrap it around a suitably sized dowel and pop it in boiling water for a few seconds - job done


Title: Re: DPC Models 16" Junkers D1
Post by: Crabby on October 16, 2019, 09:10:04 AM
I have a roll of reed probably from AC Moore I use in instances like these. Wrap it and boil it. I never tried styrene but it would probably be better.


Title: Re: DPC Models 16" Junkers D1
Post by: skyraider on October 16, 2019, 11:25:21 AM
Guys,
 The lift and foot step are straight rods mounted to "D" brackets.

Skyraider


Title: Re: DPC Models 16" Junkers D1
Post by: TheLurker on October 16, 2019, 03:15:55 PM
Perhaps...
Card cut-outs for the D brackets glued to the fuselage then thread through some button thread.  Pull as taught* as possible then smear with cyano to stiffen it?


*Use long thread, anchor one end with tiny dod of CA, pull through and anchor t'other end ditto, cut and then smear rest with CA.


Title: Re: DPC Models 16" Junkers D1
Post by: yagua on October 17, 2019, 06:06:07 AM
About the handles..
Looking around I found this pic
http://www.wingnutwings.com/ww/vEF754EA7/www/products/model_kitsets/32065/archive_photos/Junkers%20D.1%205183~18%20details.jpg
Its visible in the upper left one that the handles where mounted on a V shape support, easy to simulate to a few thin paper strips (cyano hardened) and a little whire or wood string
Also here http://www.wingnutwings.com/ww/productdetail?productid=3180&cat=1
First row, fifth picture from the right; and third row, first pic from the left


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 17, 2019, 06:49:48 AM
Guys, hang on! The issue I have isn't with the material, it's that the D brackets are so small and I have senior fumble fingers! :) :) :)

I'm trying to figure out the best way to hold the little suckers still so I can glue the rod on. I think I'm going to lay down some masking tape sticky side up to hold the little brackets and then glue everything together.


Title: Re: DPC Models 16" Junkers D1
Post by: yagua on October 17, 2019, 06:59:32 AM
As a former static models maker, I would lay three paper stripes flat, spaced a proper distance in paralel, then glue the wire across, bend and trim excess (while holding by the wire with tweezers)


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 17, 2019, 07:30:42 AM
AH-HA!! It worked!!

Thanks for the suggestions folks. Some interesting ideas there.

The two left handles will have a third bracket added once the glue on the end pieces dries.


Title: Re: DPC Models 16" Junkers D1
Post by: skyraider on October 17, 2019, 12:22:26 PM
Yagua is correct on the handle. The "D" was for simplicity although small a detail
such as it is. Had I been able to do it in thin plastic sheet and rod it would have been
scale.

Skyraider


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 18, 2019, 07:16:42 AM
Got the lift handles installed. Fuselage still needs head rest and windscreen installed.

Next task deciding whether to install the landing gear or the wings next.


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 21, 2019, 08:09:48 AM
Just about there! Still on the to do list:
Bending up the prop shaft (Need to decide whether to paint the grey prop or not)
Making the hole for the rear peg
Mounting the machine guns. This is a puzzlement. I think i need to add a spacer to the bottom of the guns because without it the left gun is aimed at the back of the radiator and the right gun rests on the top of the exhaust.

Oh, and weight with guns and motor is .811 ounces! Dang!!


Title: Re: DPC Models 16" Junkers D1
Post by: yagua on October 21, 2019, 10:25:11 AM
Can you un-glue the exhaust? I went thru the link I posted ( http://www.wingnutwings.com/ww/productdetail?productid=3180&cat=1 third row, picture at the center), and saw that the exhaust is lower (the entire engine, actually), and the frontal radiator is prety small (easy to sand down)


Title: Re: DPC Models 16" Junkers D1
Post by: Crabby on October 21, 2019, 10:44:56 AM
nice effort Dan. One of the things I used to worry about a lot was the cockpit coaming. After some serious procrastination I bit the bullet and fig'd out a way to do it that made sense to me. It made a big difference in the appearance of my Tripehound. It added zero to the flight time, but it was a thorn in my saddle till I worked it out.


Title: Re: DPC Models 16" Junkers D1
Post by: Dan Snow on October 21, 2019, 11:41:02 AM
I know what you mean Crabby, I've considered and discarded several ideas about the coaming. Tried out a coupe but didn't like the the results. I will figure it out eventually.