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P-39 Airacobra Brotherhood

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P-39 Airacobra Brotherhood

Old 07-27-2015, 08:39 AM
  #176  
tsawyer148
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Thanks for the add! Have always really liked this airplane and finally put one together for warbird racing. Flies like a dream!

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Old 09-06-2015, 06:40 PM
  #177  
warbird51
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You can't have too many Airacobra's!!! FMS P-39 and an ESM P-39. Both are electric powered. The ESM is powered with a Tacon 160 motor with a YEP 120HV esc running on 12s 5000's. 16-10 Master Airscrew 3 blade. 3200watts, 69 amps with 9300 rpm's Sierra Giant scale retracts Test flight was today. Flies great!
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Old 10-22-2015, 12:10 PM
  #178  
simple
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[/QUOTE]ESM - . 3200watts, 69 amps with 9300 rpm's Sierra Giant scale retracts Test flight was today. Flies great!

What is the overall weight of the ESM after the build with batteries on or off board?

I am finally getting ready to put my Peppino P-39 back on the table and complete the motor/speed controller and battery install.
Old 10-22-2015, 09:11 PM
  #179  
warbird51
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My all up weight with a full cockpit/pilot is 25lbs with 12s batteries installed.
Old 10-30-2015, 03:53 PM
  #180  
Charley
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Simple,

How ya coming on yourP-39 motor & ESC setting up?

CR
Old 01-04-2016, 04:32 PM
  #181  
badarkstar
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This thread seems to kind of died. I have about 35 flights on my ROC Hobbies P-39. It is a cool little plane. The only problem I have had is occasionally one of the main gear does not come down. After I cycle it a few times I get all 3 down. I even bought all new main gear and replaced them, and it still does it once in a while.
Bill
Old 01-05-2016, 12:16 PM
  #182  
Charley
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Originally Posted by badarkstar View Post
This thread seems to kind of died. I have about 35 flights on my ROC Hobbies P-39. It is a cool little plane. The only problem I have had is occasionally one of the main gear does not come down. After I cycle it a few times I get all 3 down. I even bought all new main gear and replaced them, and it still does it once in a while.
Bill
I'm sure you've tried replacing the cables. Maybe a different receiver is an idea for troubleshooting. How about the servo travel adjustment?

CR
Old 01-22-2016, 05:46 PM
  #183  
simple
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Default Just staged the P-38 at Warbirds Over the West in Phoenix

Im still working out my choice of motor and speed controller but I did a static with the current set up.
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Old 02-02-2016, 12:52 PM
  #184  
ByronF
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Default P-39 Lawn Dart

So sometime back I posted some pictures of my old red box redesigned scratch built P39, where I did foam core wings and a built up nose to replace the plastic piece. It was done old school with upright 2S - 61 motor (an old re-built HB from back in the day) and with fixed gear.
On a nice sunny day this past summer I took it out for its maiden flight. The flight started out fine until about 20 feet after takeoff when I discovered that I had too much throw and not enough expo dialed in. It was up and down and round and round like crazy and I was always just a fraction of a second behind. So I finally managed to pull the throttle back, gained some measure of control, made an approach to land and tip stalled.
As you can see from the pictures it went in like a lawn dart.
Went from too fast and twitchy, to too slow and tippy. What a day.
Fortunately it rained pretty good the day before and the field was soft earth as it did its lawn dart thing. Not much damage to the plane fortunately. Had to strip down the motor and clean out all the muck and grass and then re-assemble.I have adjusted the throws down and cranked in more expo. It is ready to go again this summer, so we will see what happens.
ByronF
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Old 02-03-2016, 03:13 PM
  #185  
simple
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Awesome!

Love the Lawn Dart approach - looks like the wingtips never touched the ground

At least yours is attempting to fly, mine is still on static display only pending motor and battery mounting..
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Old 02-03-2016, 03:39 PM
  #186  
Charley
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Glad it didn't do much damage. Good looking model. Where did you come up with the wing cores?

CR
Old 02-03-2016, 04:09 PM
  #187  
ByronF
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Charley
I cut the foam cores myself with my home built foam cutting bow and power supply.
Many many many many years ago when I got my first red box kit, I made tracings of the root and tip ribs as templates just in case.........
Over the years I have built a number of P-39s from the tracings but no longer as canopies are hard to find.
If you want info on my foam curing rig or a copy of the rib templates let me know and I will try to post it in this thread.
ByronF
Old 06-21-2016, 07:52 AM
  #188  
Wrangler1
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Hi, can you add me to this group?. I just bought a VQ P-39 Airacobra ARF model and wants to post and share what i found during the assembly.
Thanks.
Mr. Donald Cott (Wrangler1)
Old 06-21-2016, 08:12 AM
  #189  
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you just need to sign in to RC universe to post. accounts are free if you don't have one
Old 06-22-2016, 04:47 AM
  #190  
Plano78
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Just a few recent shot of my girl "Public Relations II" at Warbirds Over Texas this month.
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Old 06-22-2016, 04:54 AM
  #191  
Charley
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Originally Posted by Wrangler1 View Post
Hi, can you add me to this group?. I just bought a VQ P-39 Airacobra ARF model and wants to post and share what i found during the assembly.
Thanks.
Mr. Donald Cott (Wrangler1)
By all means tell us about it. I have a VQ Macchi C.205 Veltro. Pretty well-built model.

CR

Last edited by Charley; 06-22-2016 at 05:00 AM.
Old 06-22-2016, 04:20 PM
  #192  
simple
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Plano78 - Great engine mounting job, it hardly shows, and it looks like that was a greased landing!
Old 01-02-2018, 08:06 PM
  #193  
Iron Dog
 
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Working on some more P-39s for this upcoming season of Scale Warbird Racing. Two composite fuselages laid-up
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Old 01-02-2018, 08:15 PM
  #194  
Iron Dog
 
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New scale laser-cut wing. But even though the wing was actually designed for retracts, I have not had time to rework my plug to incorporate a retracting nose-wheel in the scale location (as stated as a goal in a prior post). So, unfortunately have to modify the wing design back to using fixed gear. But, am building the optional split flaps.
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Last edited by Iron Dog; 01-02-2018 at 08:18 PM.
Old 01-02-2018, 08:24 PM
  #195  
Chad Veich
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They look great Iron Dog, keep the pics coming.
Old 05-07-2018, 07:23 AM
  #196  
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Default wing area

Aside from the larger Gold Edition kit, I've seen the older Top Flite P-39 in both red and yellow boxes, and wing area listed on the boxes can be 606 sq in or 650 sq in (span = 60" in both cases). The one set of plans I've seen, though, says wing area is 650 sq in. Were there 2 different versions (sizes) of the earlier kit? If not, what is the wing area?

Also, is there a decent scan of the plans uploaded anywhere so I could have a look at the proportions and see if it's something I'd be interested in building?

Last edited by Tony Pacini; 05-07-2018 at 03:48 PM.
Old 05-07-2018, 08:18 AM
  #197  
Zero
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Tony,

I have a Gold Edition for sale on RCG with retracts and all other accessories if interested for . Look it up. The box states that the wing area is 742.8 sq. inches. The wingspan is noted as 63".

Fred
Old 08-01-2018, 09:14 AM
  #198  
bruff
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Just acquired an ESM P-39. Going to convert it to electric. Anybody have an extra cowl they would like to sell? Nobody has one instock.
Thanks,
Bob
Old 11-15-2018, 10:52 PM
  #199  
igoren
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hello every one , I would like to join in . I have something very interesting to post here .
Old 11-18-2018, 03:12 AM
  #200  
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