Notices
RC Warbirds and Warplanes Discuss rc warbirds and warplanes in this forum.

Building a Top Flite GE 1/8 scale F4U Corsair

Old 05-24-2008, 08:15 PM
  #926  
Wildcard
Member
 
Join Date: Jan 2003
Location: Medical Lake, WA
Posts: 55
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Hey tough luck there Tom. Sorry to see that happen. The plane looked really nice. I've got a TF Corsair in the box that I'm draggin my feet about building just because I'll have to fly it when I'm done and I'm not sure I won't do the same thing you just did. Thanks for sharing the video. It's a good lesson for all of us what will happen to a corsair if you take off before you have the right airspeed. Again, sorry to see that happen.

Brett
Wildcard is offline  
Old 05-24-2008, 08:34 PM
  #927  
RCPtero
 
RCPtero's Avatar
 
Join Date: Jan 2007
Location: Manassas, VA
Posts: 332
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Brett,

Thanks! I need to do a happy medium between the two take off runs. The first one was coming up to speed, the tail was actually flying, before the prop hit.

The good news is, I've already got the repair in the works. I've cleaned it up and epoxied it back together. I'm going to replace the two 1/16" x 1/2" ply spar joiners with 1/8" by 2" long joiners that will sandwich the top and bottom wing tip spars and the end of the main spar.

If this were a monokoted plane with the same damage, I could have her back to the field on Monday. But then, I don't think a monokoted plane would have come through as intact. I think the fiberglass really added a lot of strength.

Oh yeah, I also notice during my early taxiing, she really likes to roll on the grass. Even when I chop throttle, she kept on rolling. There's a lot of inertia there!!


Tom
RCPtero is offline  
Old 05-25-2008, 09:53 AM
  #928  
jeffk464
Senior Member
 
Join Date: Oct 2004
Location: Lehi, UT
Posts: 1,692
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

In the video it looked to me like the grass field contributed to the crash. It looks like the grass is dragging on the wheels too much pulling the nose down, when you compensated for this it caused the early lift off. If you have a paved runway somewhere I think it would help a whole lot.
jeffk464 is offline  
Old 05-25-2008, 10:17 AM
  #929  
vasek
My Feedback: (4)
 
vasek's Avatar
 
Join Date: Jan 2002
Location: Prague, CZECH REPUBLIC
Posts: 4,144
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I second Jeff, a paved runway would be the quick fix for the first couple of flights.

VERY nice looking corsair Tom!
vasek is offline  
Old 05-25-2008, 02:33 PM
  #930  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Tom,

I watched in my thread as you built your Corsair and you did an excellant job. I don't know the words to express how I feel about someone that put that much effort into something and then have it crash on it's maiden flight. I just wish you good luck and hope the repair goes well and your next flight is a huge success.

Your friend,

Barry/NCIS
NCIS is offline  
Old 05-27-2008, 07:46 PM
  #931  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Snurkle,

This is it now. Don't worry I'll get back to it and finish sometime.

Gibbs
Attached Thumbnails Click image for larger version

Name:	Wu60848.jpg
Views:	25
Size:	108.8 KB
ID:	958396   Click image for larger version

Name:	Fa84991.jpg
Views:	29
Size:	93.3 KB
ID:	958397   Click image for larger version

Name:	Ge94358.jpg
Views:	25
Size:	86.3 KB
ID:	958398   Click image for larger version

Name:	Wr55752.jpg
Views:	24
Size:	106.3 KB
ID:	958399  
NCIS is offline  
Old 05-27-2008, 08:56 PM
  #932  
snurckle
Senior Member
 
Join Date: Apr 2008
Location: New Bern, NC
Posts: 127
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Looks sweet. Thanks for posting! Do your cowl flaps work, or are they just flared for appearance?
snurckle is offline  
Old 05-27-2008, 09:09 PM
  #933  
RCPtero
 
RCPtero's Avatar
 
Join Date: Jan 2007
Location: Manassas, VA
Posts: 332
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Thanks for the kind words all! I agree, the grass field definitely contributed! I think my problem is that I was being moderate with the throttle and held full up elevator until she hit flight speed. The throttle was due to what I've read online about not just jamming it forward and going. What I think I need to do is use moderate throttle and run her up to the point where the tail lifts off, give it just a touch of up elevator and then max the throttle out. This being my first warbird, I actually kind of expected things like this as part of the learning curve. I know now a couple of things NOT to do on takeoff!!

I have faithfully reproduced the accident in my flight sim. I've not been able to find a grass field which doesn't roll like asphalt, but I can simulate that by using a low throttle. If I do that with full up elevator, she stalls right after takeoff and rolls to the left, drops like a rock and snaps of the left wing. Daja vu!!


On the good side. The wing is now back together. I did the initial sanding tonight and have used glazing putty to smooth over all the joints. Tomorrow night I should be able to sand her smooth and she'll be ready for fiberglass over the repaired area. I really am impressed with how well she came through that crash. I'm convinced that if she had be monokoted and gone through that crash, that I'd be building a whole new wing.


Gibbs,

Still love all the details on yours.


Tom
RCPtero is offline  
Old 05-28-2008, 12:45 PM
  #934  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

They are just flared out for looks and to cool the engine.

Gibbs
NCIS is offline  
Old 05-28-2008, 05:41 PM
  #935  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Tom,

If you don't mind I would like to see some repair pictures so I can really see what was broken and how great you fixed it.

Barry
NCIS is offline  
Old 05-28-2008, 05:52 PM
  #936  
snurckle
Senior Member
 
Join Date: Apr 2008
Location: New Bern, NC
Posts: 127
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

SMUGator or NCIS-
I will be using Sierra Retracts, and am trying to find wheels for them. I really wanted to go with Sullivan 4" Aluminum Hubs, but they are 1-3/16" wide. With the Sierra Retracts, how much room do I need to squeeze the tire into, keeping in mind - I plan to have gear doors as well.
snurckle is offline  
Old 05-28-2008, 05:59 PM
  #937  
RCPtero
 
RCPtero's Avatar
 
Join Date: Jan 2007
Location: Manassas, VA
Posts: 332
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Oops!! Knew I should have made some shots before I skinned over the repair! Here's a shot my buddy took at the field of the break. It shows pretty clearly what broke. The spars simply separated at the glue joints without breaking. It was only the 1/16" ply spar joiners which snapped in half. I think the trailing edge had an angled break across it, but it fit right back together. I think the leading edge broke at one end of the lap joint, but went back together the same way. And of course, the sheeting broke.

For repair, I cut two new spar joiners out of 1/8" ply to go from top of the top spar to the bottom of the bottom spar, and slightly longer than the spar joiners. I glued everything back in place, then put in the new joiners and clamped them in place. I did have to cut a filler piece to go between the main spar and the new spar joiner because the main spar isn't as thick as the wing tip spars.

I hope all this makes sens.


Tom
Attached Thumbnails Click image for larger version

Name:	Fd91309.jpg
Views:	45
Size:	47.7 KB
ID:	959143  
RCPtero is offline  
Old 05-28-2008, 06:01 PM
  #938  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I used CJM retracts in mine and 1" was too much. I had to really wack away at the top of the ribs in the wheel well for it to work. Be aware though that Seirra's aren't as fat as CJM's are. Plus they are a much better retract. You may be ok but I do believe SMUGator used Seirra's retracts in his. He will porbably respond.

Gibbs
NCIS is offline  
Old 05-29-2008, 07:44 AM
  #939  
snurckle
Senior Member
 
Join Date: Apr 2008
Location: New Bern, NC
Posts: 127
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

NCIS - I can't really tell, but did you put the recognition lights on both sides of the wings? I know you had blue formation lights on the tops, but I also thought you had the ID/Recognition lights on the bottom of both wings.

I went through a pretty long debate with my dad on the purpose of the lights, and searched pretty far on the internet to find them on pictures. I never found a 'reason' for the lights, and I also didn't see them on both sides of the wings. I figured the lights were for IFF, and thought that they may have been utilized by the LSO on carriers. But don't think they were used for carrier based landings. Many pictures of early F4U's don't have the recognition lights, and they can be somewhat hard to spot on refurbished/museum birds.
snurckle is offline  
Old 05-29-2008, 04:48 PM
  #940  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

They are only on the bottom of the right wing if I remember right. They also were as they say recognition lights. Before takeoff the squad leader told the rest of the pilots which light to light when landing. If the wrong light was on then they knew something was wrong and usually escorted that plane down to an armed greeting. You never know when a spy might be trying to gain access to the field for information.

Gibbs
NCIS is offline  
Old 05-29-2008, 07:17 PM
  #941  
taterhunter7
Junior Member
 
Join Date: May 2008
Location: cypress, TX
Posts: 2
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

hey guy's. I'm new to the forum but have several 1/8 to 1/5 scale corsairs that i built and modified for flight and the best advice i can give u is, yes the pull pull system works great for tail whell and rudder combination provided u use the right cable and a high torque servo. as for the rudder an aluminum ro epoxied behind the rudder leading edge between and under the ribs will strengthen ur tail without addind too much weight. as for the build and flying, it's alot harder than it looks due to the engine size and weight of plane. it's still very fun though. most of your queries can be addressed if u look at the aspects of your smaller craft and it's faults prior to building and flying.
taterhunter7 is offline  
Old 05-30-2008, 01:36 AM
  #942  
SMUGator
Senior Member
 
SMUGator's Avatar
 
Join Date: Oct 2003
Location: Sammamish, WA
Posts: 1,406
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair


ORIGINAL: snurckle

SMUGator or NCIS-
I will be using Sierra Retracts, and am trying to find wheels for them. I really wanted to go with Sullivan 4" Aluminum Hubs, but they are 1-3/16" wide. With the Sierra Retracts, how much room do I need to squeeze the tire into, keeping in mind - I plan to have gear doors as well.
I'm building around Sierra retracts and Dave Brown 3 1/2 in wheels. Those are 7/8 in. wide. I doubt that you could go much over 1 " wide.

Tom
SMUGator is offline  
Old 06-04-2008, 02:23 AM
  #943  
ho2zoo
My Feedback: (5)
 
Join Date: Mar 2002
Location: Louisville, KY
Posts: 1,077
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

I just flew the first two flights with my Top Flite Corsair this past Monday. OS .91 2-stroke, CJM retracts, flaps (of course) and Monokote covering. I bought it mostly built at a swap meet and finished it up. Flies great! Does need a firm hand on the rudder during TO. In the air it was really smooth! In the landing pattern I slowed down to about half throttle, dropped the gear, dropped about 35 degrees of flap- it really slows down in a hurry! Held a little throttle until just over the runway about five feet high. It floated in real nice! The recommended elevator high rate might be a little too much; maybe a little expo is called for.

All in all a really sweet ride!
ho2zoo is offline  
Old 06-04-2008, 05:43 AM
  #944  
RCPtero
 
RCPtero's Avatar
 
Join Date: Jan 2007
Location: Manassas, VA
Posts: 332
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Wonderful!! Congratulations on a successful maiden!! Any idea what her weight is?
RCPtero is offline  
Old 06-04-2008, 10:56 PM
  #945  
ho2zoo
My Feedback: (5)
 
Join Date: Mar 2002
Location: Louisville, KY
Posts: 1,077
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Don't know what the weight is- it doesn't feel heavy though... I'll have to get a scale and find out.
ho2zoo is offline  
Old 06-07-2008, 07:05 AM
  #946  
kkozy
Member
 
Join Date: Jul 2007
Location: magnet, IN
Posts: 32
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

NCIS, Have you maidened your son`s 1/8 scale yet ? I`ve been away for a while, and have not heard you mention anything about it. I an curious as to the final weight, and how it flew at that weight. Sorry that i have not kept up with my build thread. I`ve been away from it for too long, and i don`t want to force myself to go work on it. I`m afraid that if i do, i`ll start setteling for "that`s good enough" instead of "that`s the best i can do". The wife is starting to get tired of looking at it, so it won`t be too much longer and i`ll have to do something. I`ve finished my son`s Indpls Colts plane and maidened it. Couldn`t ask for better. Two clicks left aileron, and one click down elevater for straight and level ! I`ve also took on a new student. This one is so green, he doesn`t know what stick movement does what. But then agian, I remember how many times i crashed because i didn`t know what i was doing (self tought). Being an instructor can definatly bite a chunk out of your flight time ! But if it brings another person to this hobbie, it`s worth it. I`ll get some pictures of my progress, and the colts plane soon. Kozy.
kkozy is offline  
Old 06-07-2008, 02:28 PM
  #947  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

kkozy,

I have the 1/8th scale set aside and on the back burner. I am to much in love with the 1/4 scale build to leave it to finish up the 1/8th. It is sitting on my other work table covered with a blanket after I put 2 coats of wax on it. It is not getting dusty or any worse for wear by sitting all by itself back in my other shop. My Son isn't sure he wants me to fly it because he loves it so much. He would be just as happy if I keep it as a show piece. It weighs about 12 and 1/2 pounds.

Barry
NCIS is offline  
Old 10-31-2008, 09:57 PM
  #948  
RCPtero
 
RCPtero's Avatar
 
Join Date: Jan 2007
Location: Manassas, VA
Posts: 332
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Okay folks. Assuming the weather cooperates, I intend on takin' her back out tomorrow. Repairs are done. I pulled the fuel tank and checked plumbing and wiring this evening while handing out candy to the kids. I also rebalanced her. Had to add 2 oz to the right wing tip to make up for weight gain during repairs. She now weighs in at 13 1/2 lbs!!! That wing is really heavy!! I think she'll fly, but I suspect she'll have to be moving pretty fast on take off and landing. I'll get her up to altitude and try the flaps to see how she behaves with, and without, them deployed. If she's okay with them down, I'll use them when I land to slow down my landing speed.


Tom
RCPtero is offline  
Old 11-01-2008, 02:12 PM
  #949  
NCIS
Senior Member
Thread Starter
 
Join Date: May 2006
Location: Janesville, WI
Posts: 4,948
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Tom,

It's good to hear from you again. I hope this time we can see a sweet video of your first flight after repairs. I am waiting to see how it flies at that weight before I try mine next spring. I have to find a smooth grass or paved runway because of the CJ Junk retracts and the need for speed on takeoff though. Good luck and God be with you.

Barry
NCIS is offline  
Old 11-01-2008, 04:25 PM
  #950  
RCPtero
 
RCPtero's Avatar
 
Join Date: Jan 2007
Location: Manassas, VA
Posts: 332
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Building a Top Flite GE 1/8 scale F4U Corsair

Thanks Barry!

It went better today than Memorial day did. She came home in one piece!! First takeoff run did the same thing as first one last time. Got up to speed, tail came up, and kept right on going over the top!! Quick look over and no damage. Took her back to the bench, restarted and taxied out again. This time I held more up elevator to keep the tail down. Got a straight and smooth take off. She started to climb out. Got up about 40 feet AGL, running under full throttle. All of a sudden, she snapped to the left. Ailerons were ineffective. I chopped throttle and immediately, the ailerons took effect and rolled her back level. From there, I basically dead sticked her in to the end of the runway. My left retract took the brunt of the landing and bent. Right gear also seems to have some issue, but I've not eyeballed any physical damage yet. Otherwise, no visible damage.

So, now I'm going to pull the retracts and put fixed LG in place. I figure that'll drop the weight a bit and give me something a little more robust for learning. Once I get past the learning curve, and get the retracts fixed, then I'll switch back.

I also suspect at some point, assuming she survives my learning curve, I'll strip the skin off of her, do what I can to lighten her up and re-skin. She definitely wanted to fly. I just think my climb out was a touch too steep and she lost airspeed. Although I really didn't think I was climbing that aggressively!!

One of the guys at the field was filming. I'll have to see if I can get a copy of the film. If I can, I'll post it.


Tom
RCPtero is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.