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AMF Wen Mac P-39 Airacobra Empty AMF Wen Mac P-39 Airacobra

Post  rsv1cox on Fri Feb 13, 2015 12:07 pm

I found this "P-39" Airacobra on ebay for not to much money, mostly complete but with problems.

AMF Wen Mac P-39 Airacobra Pbucket

Nasty engine but not all bound up, broken canopy, broken fuel tank nipple and filler and broken front attachment pylon.

AMF Wen Mac P-39 Airacobra Pbucket

Fixed all of that.

Fuel tank has problems, pick up nipple was broken off as well as the vent. Filler nipple was hanging by a thread.

AMF Wen Mac P-39 Airacobra Pbucket

Fixed that and the front pylon - sorta

AMF Wen Mac P-39 Airacobra Pbucket

Not real happy with the repair, I found this "parts" P-39 at an outrageous $125.00 BIN or best offer. I offered less than half that and the seller took it. It had no engine, but I have plenty of those looking for a home, But it did come with a spinner, rockets, better canopy, an intact fuel tank, and a better front cowl.

AMF Wen Mac P-39 Airacobra Pbucket

The PO had removed the engine and glued on the spinner with a free flight prop and used it as a static display without ever fueling it.

Between the two I should come up with one really nice model. But, these Wen mac P-39’s are so out of scale as to be laughable. The nose moment is way to long, the vertical stabilizer doesn’t even come close along with the main landing gear, that I can’t figure out. It’s angled way to far back, to say nothing about this being a mid engined airplane.

AMF Wen Mac P-39 Airacobra Pbucket
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Post  roddie on Fri Feb 13, 2015 4:30 pm

Hey Bob, sorry about your being down with the flu.. but at least you have something to take your mind off of it.

The main gear can't be in the correct position.. Huh... I have a Cox Cosmic Wind that's main gear will swivel if not locked into a notch inside the fuse. Perhaps that's the case with this P39? I couldn't find much on the web.. but most photos show the gear in that position.. What? It would make sense though; that it might have been designed to swivel back for it to fit better in the box.. and moved forward once taken out? It also appears to sit "tail-low".. if you ask me. Does the underside of the fuse easily come apart to see if there's a gear locking clip inside anywhere?

When watching this vid.. the main gear looks to be in the same position as yours.. but the model almost looks tail-heavy in flight.



https://www.youtube.com/watch?v=FUUJVKwhUyk
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Post  rsv1cox on Fri Feb 13, 2015 5:00 pm

Yes, the main gear locks behind this pylon and is very difficult to dislodge.  And they are all built that way.

AMF Wen Mac P-39 Airacobra Pbucket

It is built that way I would think to soften the landing, and would work very well in that regard.  But in hard landings it would hit the wing and just doesn't look right.  I may remove it as I did the second P-39 and bend it a bit.  It just looks so un-scale.

AMF Wen Mac P-39 Airacobra Pbucket

Notice the removed main gear is not bent other than the triangle that fits over the pylon.

But the new P-39 does have a good fuel tank and a better canopy.

AMF Wen Mac P-39 Airacobra Pbucket

It's good points though are, the olive drab coloring is believable and it's nicely thought out and strongly built.
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Post  Mark Boesen on Fri Feb 13, 2015 9:59 pm

Looking good!

Good o'l Brasso metal polish will work great on the canopy.

Notice the landing gear wire is the same as the SN-J's

I wish i had a spinner for you, i might have a prop.

AMF Wen Mac P-39 Airacobra Aircob10
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Post  rsv1cox on Sat Feb 14, 2015 8:34 am

I notice the antenna on your's is intact, both of mine are broken off, benefits of buy a new or better example. I'm not sure what the white plastic insert is though? One of mine has it the other doesn't. I prefer the clear canopy.

AMF Wen Mac P-39 Airacobra Pbucket

One reason I bought the second parts model was for the spinner. I see that yours has a simulated cannon through that spinner. I had to use a razor saw to remove it as the PO had glued it on.

The horizontal stab is a mess. It's really bent and I can't figure out why. I'm going to try to straighten it by binding both ends and heating the middle with a hair dryer, my heat gun even on low would eat it up.

AMF Wen Mac P-39 Airacobra Pbucket

The elevator is broken in the middle, I will have to graft on a piece of plastic or use a dowel to repair it. It will be hidden inside the fuselage.

If I want to completely repair it I will have to construct a belly pan out of balsa, make up a front L/G strut and add a bell crank.

Enjoyed that video roddie, flyer liked to keep it on the ground. From what I have read, Wen Mac intended these to be sort of a trainer/slow flyer for beginners.
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Post  stuntflyr on Tue Feb 17, 2015 2:51 pm

I have a couple of Day Fighters and a Jungle Fighter. My first one was a Day Fighter (the white one with British markings) from my parent's friend Bill Bobe for Christmas when I was 4 yo. I modified it in the 70's to look like my dad's friend Larry Havens' P-63 racer. I clipped the wings!, and made ribs from styrene at the tip, mid span, and next to the belly pan so I could close the bottom with styrene. I removed the scoop from the top, cut out the motor mounts, tank and stuff and added a ply firewall and installed a Tee Dee on a beam mount tank. It never flew but I restored it to a Wen Mac by subtistuting an unmodified fuselage bottom. I found a bunch of cool Wen Mac parts, like chrome stacks, chrome struts, I made gear doors, NOS spinner, four bladed prop, Mark gave me some good engine stuff, so it's going to be cool. I never finished it and it sits complete but unfinished.
I flew mine a lot, they fly fine, but are better when you replace the prop with a Cox fiberglass 6x4 and use Cox red can Racing Fuel, or one could use Sig 25% to 35% nitro fuel which helps the Wen Mac perform much better. They like nitro, like OK Cubs. But the old King Cobra only fly level, and my Jungle Fighter has an elevator that is much larger than my earlier Day Fighters. Just noticed that, I guess it needed it for some reason. They're fun, but just for cruising in level flight and collecting as a hobby oddity. Odd, like us that fly model airplanes!
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Post  Mark Boesen on Tue Feb 17, 2015 3:17 pm

On that broken elevator you might try a small wire pin drilled into plastic and super glue. Steam and gloves seems to work best for reforming plastic, i've had a couple times using a heat gun where i got it too hot and it melted!

(It's too fricken cold out today, so i'm glued to the computer)

AMF Wen Mac P-39 Airacobra 65wenm11


Last edited by Mark Boesen on Tue Feb 17, 2015 4:10 pm; edited 1 time in total
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Post  rsv1cox on Tue Feb 17, 2015 3:20 pm

Yes, the two planes are very similar interchanging many parts.  Sounds like you had a good time with yours.  Got a picture?

I have been looking for a parts day fighter to replace the belly-pan/bell crank on this P-39, but I don't think the day fighter has the same style pan.  I can duplicate the missing front wheel strut, but that pan is a different animal.

I did straighten the really bent horizontal stab- see above picture, by using an ordinary clothes iron.  I looked for my monocote iron but couldn't find it.  Don't laugh the clothes did fine, ironed it flat as a flounder.  Put the iron on warm, used a wet terry towel and ironed it.  

AMF Wen Mac P-39 Airacobra Pbucket

The seller had disassembled the fuselage from the wing, can't figure out why, he put it in a large enough box to ship it in one piece. When he did he broke one of the front tabs. Putting it back together I put my finger through the wing support and had to reglue it. These do not reassemble easy.
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Post  Mark Boesen on Tue Feb 17, 2015 4:14 pm

lol, my first time using monokote, used an iron, it worked, but not the best. I looked for the correct Wen-Mac red, wide tipped blade for you, found one it's pretty chewed up, its your if you want it.
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Post  rsv1cox on Tue Feb 17, 2015 4:43 pm

Mark Boesen wrote:lol, my first time using monokote, used an iron, it worked, but not the best. I looked for the correct Wen-Mac red, wide tipped blade for you, found one it's pretty chewed up, its your if you want it.

Is it like this Mark?

AMF Wen Mac P-39 Airacobra Pbucket

AMF Wen Mac P-39 Airacobra Pbucket

It's a standard Wen Mac prop but the spinner doesn't snap on.  Is there some sort of adapter that I need?  Perhaps the cannon thingy.
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Post  Kim on Tue Feb 17, 2015 5:05 pm

The spinner pops onto a metal disk that's held under the prop nut. I've got a spare if you need one...also a spinner/cannon that are molded in black plastic.

AMF Wen Mac P-39 Airacobra 6_12
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Post  Mark Boesen on Tue Feb 17, 2015 6:52 pm

Yep, that's it, i wasn't sure you had one.
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Post  dirk gently on Wed Feb 18, 2015 9:12 am

Nice model this, however, are you sure it's an Aircobra? The shape of the fin and rudder is much more like a P-63 Kingcobra.
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Post  Kim on Wed Feb 18, 2015 10:40 am

Yeah, it was always a King Cobra, but started life tagged as a P-39 Airacobra.

AMF Wen Mac P-39 Airacobra 1_airc10

AMF Wen Mac P-39 Airacobra 4_16
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Post  rsv1cox on Wed Feb 18, 2015 1:55 pm

Thanks Kim and Mark, when I saw that picture I knew what I had done. It came with that disk but no spinner, but I thought it just a random washer that the PO had put on it. Sometimes 2 + 2 for me adds up to 3 3/4.....

After a frantic search I found it, put it back on and snapped the spinner in place.

AMF Wen Mac P-39 Airacobra Pbucket

I was going to swap the best parts around from both P-39's but have decided just to leave both as is. I now have to build a front landing gear assembly and a belly pan for the partzer, install the spare engine and fire 'er up. If it turns out ok I may need that black spinner Kim.
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Post  Kim on Wed Feb 18, 2015 1:58 pm

Sure thing...just shoot me a note when you need it.
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Post  WingingIt74 on Wed Feb 18, 2015 2:03 pm

Want another P-39?  I think I paid $20 for it. If not it's going on ebay.


Last edited by WingingIt74 on Thu Feb 19, 2015 10:19 am; edited 1 time in total
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Post  Mark Boesen on Wed Feb 18, 2015 3:05 pm

That's pretty neat, it's the same model/vintage as Kim's!



AMF Wen Mac P-39 Airacobra P-6310
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Post  rsv1cox on Thu Feb 19, 2015 10:12 am

Sitting on three wheels again.  Bent up the missing front strut, simple 90 degrees.

AMF Wen Mac P-39 Airacobra Pbucket

AMF Wen Mac P-39 Airacobra Pbucket

Added a clevis to the elevator fix out of plastic, drilled a hole off-center so it snapped on then glued.  It's solid and should work.

AMF Wen Mac P-39 Airacobra Pbucket

Now all I have to do is make a belly pan out of balsa and some 1/4" dowel, add the engine and go round and round.

AMF Wen Mac P-39 Airacobra Pbucket

AMF Wen Mac P-39 Airacobra Pbucket

Edit add: Anyone here get this one?

http://www.ebay.com/itm/WEN-MAC-Airplanes-Vintage-/111597464759?pt=LH_DefaultDomain_0&hash=item19fbba2cb7

$12.35 for a bunch of stuff, but loaded up on the back end with $40.00 shipping. The most I have ever seen on these boxed models is around $17.00 with most around $12.00. Was going to bid, but forgot about it.
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Post  WingingIt74 on Thu Feb 19, 2015 11:14 am

Here's the one I have $20 + Shipping if you want it.
AMF Wen Mac P-39 Airacobra Img_1811
AMF Wen Mac P-39 Airacobra Img_1812
AMF Wen Mac P-39 Airacobra Img_1813
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Post  rsv1cox on Thu Feb 19, 2015 11:35 am

Thanks, I'll take it. Lots of parts there that I can use. I appreciate it.

PM Sent

Bob
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