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Building a Top Flite GE 1/8 scale F4U Corsair

Old 01-11-2008, 03:37 PM
  #776  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Tom,

All my planes except a couple trainers have Pilots. A plane can't fly without one. I trimmed and sanded the wing and put the thinned putty solution on the top of the wing. When it dries I'll flip it over and do the bottom. I won't have time today to get the thing sanded and primed.

Barry
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Old 01-11-2008, 05:20 PM
  #777  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Now the bottom is sanded and puttied for tomorrows sanding and first coat of primer. Then I put on the chart tape and give it a couple coats of primer and put on the rivets. I hope to be painting color on it by sometime early next week.

Barry
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Old 01-12-2008, 08:25 PM
  #778  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Today I sanded the putty down to the weave and primed the top of the wing. I found only two blemishes after it dried that will need a little putty and then I'll finish priming the bottom while the putty dries. I'll sand it and prime the putty spots after the bottom completely dries. Then on goes the chart tape. This time I'm going to use 1/64" tape. I think it will look better and hope it doesn't clash with the fuselage with the wider panel lines.

Gibbs
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Old 01-14-2008, 05:08 PM
  #779  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I primed the bottom of the wing yesterday and added the chart tape today for the panel lines. I primed it again and will take off the tape when it dries. The 1/64" chart tape is hard to see in the pictures but it's all there. I'll do the top after it dries. Then I'll put on the rivets. I also finished up the cockpit and it's installed complete with pilot.

Gibbs
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Old 01-14-2008, 11:24 PM
  #780  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

The progress on your wing is looking great. I know the effort you're putting into it will pay off in the end, big time. Looks like your pilot is quite at home in his new digs too!

Scott
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Old 01-14-2008, 11:27 PM
  #781  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I don't know... you better keep it for yourself...
you don't want to spoil your kid..
if your not a indian giver then you might want to become one

looks real nice
Ron
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Old 01-15-2008, 03:22 AM
  #782  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Looking good Gibbs. That pilot does not even look to big for it.

Geoff
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Old 01-17-2008, 01:22 PM
  #783  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I finished up with the panel lines and now I just need to take off the tape and do the rivets.

Gibbs
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Old 01-17-2008, 08:07 PM
  #784  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Rivets on and top coat for the top of the wing. The bottom will be white and light blue like the fuselage.

Gibbs
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Old 01-17-2008, 09:09 PM
  #785  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Wow Gibbs, that's looking great!

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Old 01-17-2008, 09:16 PM
  #786  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair


Gibbs

I have to agree your bird is looking great keep us posted


I know you have more snow than we do so when do you expect a maiden?? June

Cheers Bob t
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Old 01-17-2008, 09:34 PM
  #787  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Sahweeeeet!! Sure is lookin' good, Gibbs!!

I finally covered the other elevator night before last. Now I need to paint them, and the rudder, and touch up a little bit of the fuse. Then it'll be ready to attach the control surfaces and clear coat the whole thing.

For the flaps, I have the wooden blocks glued up which I'm going to use to carve out new middle flaps. I figure I'll get working on that over the weekend. With luck and perseverance, I should have the flaps and ailerons done by Monday and be ready to glass the wing!!

--

Tom
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Old 01-17-2008, 10:29 PM
  #788  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

This one is not the top flite, but Kyosho...similar in size. Thought you'd like to see a pic or two.

I had three different Top Flite Gold edition F4U's...all three had the same exact problem...stalled on the left wing abruptly. I balanced laterally and even thought of adding more weight to the right wing tip, but discovered an amazing thing instead.


Was at the field, trying to figure out the stall, and after I landed (hot due to the abrupt stall) I decided to make a quick field repair....cut a 1/8 slot in the right wing outboard of the guns and inserted a 1 1/2 inch long by 1/2 inch piece of ply...facing into the wind...like a blade. I didn't fair it in yet, just epoxied it in. (the real corsair had a stall strip in this location due to a stalling left wing tendency), so I took it up and then it stalled, not abruptly, though still dropped, the RIGHT wing. So I landed, cut about 1/4 inch off the length (left me with a 1 1/4 long stall strip by about 1/4 inch sticking out from the wing (Glued it in about a quarter inch into the LE, though I would reinforce this from behind while building in the future)

It was amazing. After trimming the stall strip, the plane floated. It would slow down like a baby...and saved me lots of retract worries. You would not believe how nice the plane flew after that. It had no flaps.

What I discovered (I am a HUGE Corsair fan...the BIGGEST in fact)... the propwash on a real plane has a cyclonic flow around the fuselage. This goes counter-clockwise if viewed from the front of the airplane. Your model airplane's cyclone is going to be worse because the prop goes MUCH faster. This makes the airflow across the left wing root different than on the right wingroot. This anomalie is more pronounced in planes like the corsair with the inverted gull. Because of that cyclone, the left wing gets marginally less lift than the right, so the stall strip stalls it at the same time with the other wing at high angles of attack (usually in landing configuration).


Maybe this helps. I lost this plane due to a bad battery...absolutely MY fault....was a spectacular crash.
Jim
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Old 01-17-2008, 11:00 PM
  #789  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

That is an excellant piece of info Jimocooper, THANKS. I bought a Top Flight Corsair a couple of years ago and I'll tell you I'm a little nervous to build it because then I'll have to fly it. No since building a static display. I really would have been P.O.'d if I put all of that time and money into a plane only to have it stall and crash. Do you have a picture of what that stall strip looked like? Also do you or anyone else have a picture of the real thing?

Thanks again,

Brett
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Old 01-18-2008, 09:40 AM
  #790  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

These corsairs are not hard to fly. No I don't have a photo of the original stall strip...I didn't have a digital camera at the time. In fact, that Corsair is one of the few that I have NO pictures, because I was so enamoured flying it that I forgot.

Don't have pictures of the real thing nearby, but plenty of books available. If you find a scale drawing of the Corsair, (F4U in Action series, or equivalent), just try to locate the stall strip in the scale location.

Personally, if I build another one, I would do EVERYTHING I could to lighten it up in the building process. The wing-loading can get high and that makes them a hot plane to land....but with flaps, they do slow down fairly good.
Jim
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Old 01-18-2008, 10:03 AM
  #791  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Heres' some photos of the stall strip. It's the small triangle just outboard from the gun ports.
In the first photo it's on the far left. In the second photo it's under the star on the fuse. In the last photo, it's on the far right.

Scott
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Old 01-18-2008, 02:37 PM
  #792  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Thanks. The info and pictures will help.
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Old 01-18-2008, 07:19 PM
  #793  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I just looked through my National Air & Space Museum photos of the Corsair hanging there. I don't have any good shots of the right wing though. However, I did find a good underside shot of the tail feathers, which shows them as white. Mine are light blue, and that's they way they're going to stay!!

Here's the photo...

--
Tom
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Old 01-18-2008, 07:42 PM
  #794  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Don't know if y'all have seen this or not, but this page has a 20+ minute video on how to fly a Corsair. Lots of good control shots, too. Should be a great resource for you true scale builders!

[link=http://www.zenoswarbirdvideos.com/F4U.html]www.zenoswarbirdvideos.com[/link]

--
Tom
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Old 01-18-2008, 08:19 PM
  #795  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Jim,

Thanks for the info. I thought about putting the stall strip on for looks alone. Now I will put it on because it will help me with the stall problem. I screwed up the paint on the top of the wing by hitting a doorway and because I forgot about the glass and the wing didn't fit to my likeing. I had to sand some paint off the back of it and go to bare wood. I Z-Poxied that and was going to paint the bottom next and save the top for last. I should have followed my fellings and done that the first time. That's the part thats most important anyway. I'll do the strip first. People see it on the ground but the bottom is up in the air so it's not that important. I'll take this opportunity to put in the strip as you said. Would a piece of triangular stock be better like the real plane had. Here are a couple pic's of the plane with the wing attached.

Gibbs
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Old 01-18-2008, 10:45 PM
  #796  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I would suggest not adding the stall strip until you test fly. When at the field, you can use scotch tape to hold it on, and make adjustments to get the proper size. Then glue it on and paint touch up.

Scott
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Old 01-18-2008, 10:51 PM
  #797  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Yeah, in fact, I would have put triangle stock on mine, had I had some in my field box. I had intended to go ahead and fair it in like a triangle later, but I ended up crashing the Corsair before I did...was having too much fun flying it.

I would suggest about 1 1/2 inch triangle stock stall strip. You can always trim a little off either end and touch up the paint. I only trimmed a quarter inch off mine. Thing is... your plane may be slightly different....maybe I had a little more of a warp in one wing...so it's just a matter of testing your plane in its stall regime.

On my first few flights of a new plane...even of a type I've owned before, I always take it up and slow fly it. I get it up there first, mind you...I don't dilly-dally near the ground, but get it up there a few mistakes high. I like to fly them gear down, flaps down (when present) and slow...to get a feel for the mushiness. That's the area you're going to get your wing stall...left or right. Hopefully, with that stall strip on the right wing, you may just have a baby. Maybe it will slightly drop a right wing...(cut a quarter inch off). Maybe it will still stall on the left marginally (glue another quarter inch of triangle..fill and sand later).

Just expirament with it...and I would be delighted to know how your flights go.

By the way...that Kyosho that I sent a picture of...well, I flew it twice before deciding to take it apart...(I bought it from somebody, and it was kind of a mess, though I have redone much). When I flew it, It had no left or right wing drop at the stall...no flaps on it either. I didn't add a stall strip (though that would look scale)...and I managed some amazing spins...AND recovered even!!!

Of note, the real corsair was prohibited from intentional spins. After 6 turns, the airplane was unrecoverable. In the test flying program, they had drogue chutes they could deploy for spin recovery..and only after deploying them could they come out of the spin.

Jim
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Old 01-19-2008, 03:06 PM
  #798  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Rather than take the time and effort to put on the stall strip permanently, I think I'll try what saramos said and just tape one on. Then I can trim or add without messing with my paint job. When the right configuration is made I will epoxy it on and fair it in with putty and repaint that panel of the plane. Thats the nice part about panel lines, you can tape off the panel you wish to paint and go for it without painting the entire top again. I'll post some more pictures when I get the bottom painted. It's 20 degrees below 0 celcius here and I can't get the garage to heat up to 50 degrees.

Gibbs
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Old 01-19-2008, 08:10 PM
  #799  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

20 Below Zero, how do you guys stand it! I've been flying three times this week and may go watch the clubs pylon race tomorrow
Aint Texas wonderful...
By the way Gibbs, your Corsair is really turning out nice. Cant wait to see it with all the markings on it.
Keith
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Old 01-19-2008, 08:24 PM
  #800  
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Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I lived in TX for 25 years as a Houston Police Officer. I can stand the cold but that heat and humidity there in TX just ain't for a born and raised northern boy like me. I do envy you now but if it wasn't for Winters how would us cheese heads reproduce.[X(] I decided to put the stall strip on for scale looks and if it helps with the stall problem well so be it. I'm one step ahead of the game. I don't see how it could hurt. This thing is as twisted as a tornado anyway.

Gibbs
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