P-39 Airacobra Brotherhood
#201
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My Feedback: (15)
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Picked this up from a ( friend lol ) mice droppings in the wings , warped fuse, mold, missing center wing ribs, hole in cowl for a glow engine.
I rebuilt the tail from Gold Edition plans, added retracts , flaps , all scratch built interior.
I had to compromise of many scale elements -examples
front gear rake is not forward because I could get the proper clearance for the prop I wanted if I angled the gear. Also angeling the gear increasing the wheel was not an option.
Scale cockpit was scratched for a baby seat elevated view lol but no choice because I worked on my CG during the build phase and I would need to locate my 6 cells under the cockpit .
I have not maiden my P39 yet and my growing concern is reading many thread on the dreaded “flat spin” of this design !!!!
I rebuilt the tail from Gold Edition plans, added retracts , flaps , all scratch built interior.
I had to compromise of many scale elements -examples
front gear rake is not forward because I could get the proper clearance for the prop I wanted if I angled the gear. Also angeling the gear increasing the wheel was not an option.
Scale cockpit was scratched for a baby seat elevated view lol but no choice because I worked on my CG during the build phase and I would need to locate my 6 cells under the cockpit .
I have not maiden my P39 yet and my growing concern is reading many thread on the dreaded “flat spin” of this design !!!!
#208
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CAD designed, laser-cut wing:
![](https://cimg1.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5916_4435c150a4b36284a4f78202790eaa0fb86471e5.jpg)
Shear webs laid out
![](https://cimg8.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5924_774684add0bb76354787c3849fa1171858843bb9.jpg)
Initial framing of both panels
![](https://cimg0.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5925_e38b24be4e4e008be39cc26e5a3996ceacf64cd0.jpg)
Close-up of carbon fiber rods and spruce spars
![](https://cimg5.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5930_358aaa7bffceb82f9c668a758b4e7335c5a41ed4.jpg)
Although this wing was designed for retracts, I am modifying these for fixed gear, because my current fuse plug is designed only for fixed gear. (And, that is one less thing to go wrong when reliability is the key for a successful racing season.).
But to make it up to the scale aficionados, I am trying scale split flaps for the first time. (Fingers crossed)
![](https://cimg1.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5916_4435c150a4b36284a4f78202790eaa0fb86471e5.jpg)
Shear webs laid out
![](https://cimg8.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5924_774684add0bb76354787c3849fa1171858843bb9.jpg)
Initial framing of both panels
![](https://cimg0.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5925_e38b24be4e4e008be39cc26e5a3996ceacf64cd0.jpg)
Close-up of carbon fiber rods and spruce spars
![](https://cimg5.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1728x1152/img_5930_358aaa7bffceb82f9c668a758b4e7335c5a41ed4.jpg)
Although this wing was designed for retracts, I am modifying these for fixed gear, because my current fuse plug is designed only for fixed gear. (And, that is one less thing to go wrong when reliability is the key for a successful racing season.).
But to make it up to the scale aficionados, I am trying scale split flaps for the first time. (Fingers crossed)
#209
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![](https://cimg2.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/2000x1504/img_1688_b036f5e7fcac36c6bcb53affb3142ba7035348c7.jpg)
Testing the fit of the first wing-half to the fuse, now that it is far enough along to remove from the wing-jig.
![](https://cimg9.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/2000x1504/img_1699_920249da3cbe596a081d84df0c7964ae0b4a68a2.jpg)
First panel roughed-out. Bottom view. Flap and aileron servo hatches are visible -- as is the unfinished split flap assembly.
#211
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![](https://cimg0.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/img_3755_44397c00e457e263c9275568df2ba8917d5cec86.jpg)
Hinge-points installed. Now for the moment of truth . . .
![](https://cimg1.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/img_3756_c2108f3e607c2f739a19c6bcf964f55171bea9d2.jpg)
Relief . . . They work!
![](https://cimg2.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/img_3767_4351ff63d5c879efddda4012f1ef31e2385b0522.jpg)
First wing-halves have been joined and wing sitting on the fuse
![](https://cimg3.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/img_3771_c53dc9f62a7a64b0dc5f43935ba6c6c25eb304a0.jpg)
![](https://cimg4.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/img_3772_f14648885e03079d86ff821fb4ec4a47b50ede5c.jpg)
Close-up of wing tip being shaped
#212
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![](https://cimg2.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/img_4012_42b139eff69f22b076e6436dbe3b7627f76a4e7e.jpg)
Two new scale wings after fiberglassing the center section (right and middle). On the left, is a wing "Frankensteined"/cannibalized from two older hand-cut prototype wings that were previously crashed. On one wing, the right panel survived; and, on the other wing, the left panel survived. My original prototype wings were not scale. They were stretched-out four inches from true scale, and had full-span ailerons.
Last edited by Iron Dog; 12-30-2018 at 10:48 PM.
#219
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![](https://cimg1.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/58440579042_02255a6f_120d_4eb2_bd99_1cc1a00ed85f_b1ce303ba295af86c51bcf8062197ef7e29487bd.jpg)
"Surprise Attack" being finished-up. Older, worn spinner being utilized for maiden flight (in case the worse happens). Two other P-39s visible on rack in background.
Last edited by Iron Dog; 10-06-2019 at 04:15 PM.
#221
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Can’t wait to work on this one next. Topflite Gold edition P39. Rumor told it was Topflites show plane. Taken to shows. Amazingly built. It had servos and stuff in the wings, airlines Ran but was all covered and painted over. I found the holes opened them up and everything in place and working. Never flown or even fully set up. Won’t take much. Have a OS .91 FX I am going to run. Leave it as shown. Won’t touch a thing.
Who ever built this plane did a amazing job and did it right. After all these years it’s still mint. Kinda a historic piece.
Who ever built this plane did a amazing job and did it right. After all these years it’s still mint. Kinda a historic piece.
#222
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Welcome to the P-39 Airacobra Brotherhood
41. Wrangler1 Santo Domingo, DOMINICAN REPUBLIC 42. Igoren CA, USA 43.BigShu
Roster
Start Date: 02-14-2014
Current Date: 03-14-2022
Roster
1.Warbirdrcer
1.5 Talimena Kidd
2.RPRCBuilder
3. Maser
4. P51NUT
5. Bill Diedrich
6. TLH101
7. Warbird51
8. lightning 759
9. P-39 fan
10. Zero TX, USA
11. redtail VA, USA
12. jtotten IL, USA
13. stage1 IA, USA
14. Plano78 TX, USA
15. p-39 MN, USA
16. ByronF Canada
17. Iron Dog CA, USA
18. RZayas OH, USA
19. jkpape KY, USA
20. lkruse OK, USA
21. airboss45 NH, USA
22. hilgale KY, USA
23. Firepower R/C IL, USA
24. LarsL WI, USA
25. AZThud AZ, USA
26. Dweeb7944 MA, USA
27. DavidAgar WA, USA
28. shanksow
29. Kurppi Turkey
30. bigbird007 WA, USA
31. yel914 UT, USA
32. skyarrow1 GA, USA
33. RMeadows IN, USA
34. RMeadows
35. Mustang Fever MI, USA
36. badarkstar AZ, USA
37. simple
38. Charley TX, USA
39. mashp39 FL, USA
40. tsawyer148 41. Wrangler1 Santo Domingo, DOMINICAN REPUBLIC 42. Igoren CA, USA 43.BigShu
If you would like to join the P-39 Airacobra Brotherhood please send me a PM, or ask by posting your request here. I will track and assign you a number.
Never can tell when you may run into another Airacobra Brother some where, so join now.
41. Wrangler1 Santo Domingo, DOMINICAN REPUBLIC 42. Igoren CA, USA 43.BigShu
Roster
Start Date: 02-14-2014
Current Date: 03-14-2022
Roster
1.Warbirdrcer
1.5 Talimena Kidd
2.RPRCBuilder
3. Maser
4. P51NUT
5. Bill Diedrich
6. TLH101
7. Warbird51
8. lightning 759
9. P-39 fan
10. Zero TX, USA
11. redtail VA, USA
12. jtotten IL, USA
13. stage1 IA, USA
14. Plano78 TX, USA
15. p-39 MN, USA
16. ByronF Canada
17. Iron Dog CA, USA
18. RZayas OH, USA
19. jkpape KY, USA
20. lkruse OK, USA
21. airboss45 NH, USA
22. hilgale KY, USA
23. Firepower R/C IL, USA
24. LarsL WI, USA
25. AZThud AZ, USA
26. Dweeb7944 MA, USA
27. DavidAgar WA, USA
28. shanksow
29. Kurppi Turkey
30. bigbird007 WA, USA
31. yel914 UT, USA
32. skyarrow1 GA, USA
33. RMeadows IN, USA
34. RMeadows
35. Mustang Fever MI, USA
36. badarkstar AZ, USA
37. simple
38. Charley TX, USA
39. mashp39 FL, USA
40. tsawyer148 41. Wrangler1 Santo Domingo, DOMINICAN REPUBLIC 42. Igoren CA, USA 43.BigShu
If you would like to join the P-39 Airacobra Brotherhood please send me a PM, or ask by posting your request here. I will track and assign you a number.
Never can tell when you may run into another Airacobra Brother some where, so join now.
#223
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My Feedback: (6)
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Hello P-39 Brotherhood I just purchased the TF GE P-39 kit. I have located a company who is duplicating the TF cockpit kit and I have just purchased the Robart nose gear. I working on scanning this thread and would like to hear how the GE flies. Oh, and sign me up to the brotherhood.
Thank you!
Thank you!