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  1. #2026

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Started making the gear doors tonight will have to wait and see if they come out ok .Made the glass a little big so i can cu the doors downfor a better fit . Devens is there room to do wing air tanks ? Sounds like a good idea and it would give you room for a smoke system if you want .
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    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  2. #2027

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair


    Devens

    I would not recomend three tanks and all of the goddies, My reason is I have checked the robart Q/D's under water at 120 psi with NO leaks of any kind, so if you use metal tee's and those farrals on all connections the only leak will be thru the cylenders, and they do leak vary slow. back in this thread I did post some bleed down numbers and some #'s of cycles. hope this does not turn you off.


    Cimara

    From what I can see your are doing thing right, now post a pic of your layout lines transfer


    Bob T
    Corsair brotherhood #5


    see george i can do it

  3. #2028

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Bob are you talking about the lines drawn on the wing its self that shows were the doors will go? If so i forgot to take a pic of that . I will take a pic as soon as the glass dries . That darn global warming thing dissapointed me its supposed to get down to the mid 20's tonight and might get freezing rain [].2 days ago we were wearing shorts and it was 70 degrees
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  4. #2029

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Winston,

    Hurray we hav our first winter storm watch of the year. It's slightly warmer here, it was 25 last night.

    I got my rotary system in the mail today. I'll start work on the wing tomorrow and take pictures for you. I hope they will help.

    David

    Corsair Brotherhood #3
    David

    Corsair Brotherhood #3

  5. #2030

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Excelent David mabe i will get mine soon. David do you have to put a bushing in the te to keep the rod from eating into the wood?I always worry when the weather man says dont worry there will be only a slight dustin if any . Thats the same thing they said in the early 90's and we had that bilzard .
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  6. #2031

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair


    Cimara

    Yes I just asumed you did a layout right on the wing or placed pins in the corners so you have some referance points.


    Bob T
    Cursair broyherhood #5

  7. #2032

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair



    P.S. guys Wehad our first real snow 3 to 4 inches just enough to have to shovel or use the blower d#$%m thing had no spark points stuck will cost me a day of build time[>:] The temps have been balmeyy -5 to +35.


    Bob T

    Corsair brotherhood # 5

  8. #2033

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    well ive been busy teaching and havent been on. i teach geom and calc so when im home aqnd have time I build. im still making great progress getting the wing tips right! it takes a lot of fine sanding to get them to look scale.

  9. #2034

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair



    Hay Tim

    how a bout some pic's

  10. #2035

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Guys
    Well it looks like we are going to get our 1st snow Looks like Friday there calling for 3-6" maybe on Saturday I can fly with ski's on we shall see


    George
    CORSAIR Brotherhood # 1
    Remember, Man\'\'s 2nd greatest adventure is FLYING, LANDING is his FIRST.

  11. #2036

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Daren:

    I share your paranoia about air leaks. But I agree that every connection represents a potential leak. I currently plan to use a single large tank per the plans with an air valve for the retracts mounted in the wing and another for the tail wheel mounted in the fuse. That way I will need only one quick disconnect between the fuse and the wing. And I currently plan to use a single servo mounted in the center section of the wing to operate all 4 landing gear doors, thereby eliminating an air valve and numerous connections. I am still fiddling with the geometry of a 2-belllcrank mechanical linkage for each door pair, and may end up using the linkage developed by one of the early contributors to this thread.

    For those who prefer to go the other way, I offer the following photo sent to me by Mort Rosenthal, the builder of the TF GS Corsair with folding wings that was featured in High Flight magazine last spring. This photo is used here with his permission. One set of air valves operates the gear and LG doors. The other set operates the wing folding cylinders and the wing locking pin drive cylinders. Mort uses micro switches to control the sequencing of all operations. The matchbox synchronizes the 4 servos that operate the flaps. Some of the wiring is for the nav lights, but I have not attempted to trace it. Tail wheel and tail wheel door operation are controlled by another set of air valves mounted in the fuselage, and fed by another air tank. The canopy is operated by an ingenious draw bar mechanism mounted forward of the cockpit that is driven by a servo converted to operate as a winch. Enjoy.

    Jim
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  12. #2037

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    yoooo George
    Have fun flying with ski's been there, but the hands don't work good enough in the cold any more, getting old sucks but its the best alternitive

    Jim
    Its so much paranoia it just in our area a sister club I have see a lot of no wheel landings and gears that would not come up or half way and then not go in eather direction, and I would guess 90 percent was the result of air leaks. so when I built my first corsair I put the system to gather on a piece of peg board using all plastic fittings and the hose pushed on to the sholder, pumped it up to 100 psi stuck the whole thing in the laundry tub and watched the mass of leeks. tryed some grease from a cylender rehab shop, twistd all the connections abit system still leeked but not as fast, that is what made me bite the bullet and go with metal fittings and farrels, same set up in the tube and the only leeks found were at the control valve when shuttling and the cylenders at the out put shaft. Not all people have a problem with the plastic its just that I did and dosese


    Hope thi does not muddy the water to much or confuseany one


    Bob T
    Corsair brotherhood #5

  13. #2038

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Jdunstan,
    There is another alternative for the retracts,although I have not seen them in operation, they were or still are advertised in RCU ,check out www.lado-tech.com
    just thought I'd toss it to you.


    George
    CORSAIR Brotherhood #1
    Remember, Man\'\'s 2nd greatest adventure is FLYING, LANDING is his FIRST.

  14. #2039

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    RT,
    your are with out the best in my book, see I knew you could




    George
    CORSAIR Brotherhood #1
    Remember, Man\'\'s 2nd greatest adventure is FLYING, LANDING is his FIRST.

  15. #2040

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    cimara,

    I never asked you for the website for the 4 7/8" wheels. I don't know where you got them and need to order a pair. Do they make a tail wheel? What changes need to be made to hold the larger wheels. Are you using the Robart 148 main retracts? I know you are making the retract doors now but can you post a couple pictures of the wheels in the wells. Did you have to set the gear aft to make it fit? Is the $125.00 for a new set from the manufacturer or did you get them somewhere else NIB? Help me out here please.

    Thanks,

    Gibbs
    Barry - Owner of Canopy Rails For Warbirds

  16. #2041

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair



    Hi guys Waiting for some 30 min epoxy to cure out,

    I have had a question I have wanted to ask for some time, realy there are 2

    1. are you building with all the goddies and mods to enter compition?

    2. with all the mods and goddies have you lost any releyablity?

    Well maybe three

    3. are you staying with in you budget?

    These are the things I have been dealing with on my new project for this season and next. Just thought I would ask to get some opinions.

    Bob T
    Corsair brotherhood #5

  17. #2042

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    heres the web sigt Gibbs there called aerotec models http://www.aerotechmodels.com/p51kit.htm If he is not in leve a message he will get back with you .I have not found anyone that makes scale tail wheels yet. to make them fit you just need to make the wheel well box 51/4 inches square . this will put it touching the first rib of the outer wing pannel make your box after you have the wheels so you can account for the clearance you need for the wheels to clear .there is plenty of room between the spar and the wheels.I am not shure what you mean as far aft for the gear . I put mine as close to the main spar and still get them to lock . hope this made since.125 is from aerotec I dont know if he makes the wheels .
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  18. #2043

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Hey Bob here the pics what do you think . I used zpoxy for the first time with glass .Its alot better than the poliester you get at the local hardware store and it dont stink nere as bad. Gibbs these pics will help you too.I got my rotary drivers to day they look top notch.
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    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  19. #2044

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Gibbs you said that you got the plans I sent ?If you did the wheel well door patterns are the size I made my wheel wells . you might want to make them a little bigger for extra room but that size will work. As you can see in the above pics you will have to strech the main doors abit to cover the opening.
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  20. #2045

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Bob the anser to you first question is no. the second question is we will see but I dont think so and the third my budget was blown along time ago on this build but I hide it very well
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  21. #2046

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair



    Cimara aka Winston

    Thanks for the responce

    Looking good, how stiff did your molds come out?


    Bob T
    Corsait broyherhood #5

  22. #2047

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Bob they are about as stiff as the cowl I got from fiberglass specialties . I was tinking of adding some renforcement to the doors mabie some wire shapped like a w or 1/ 16 inch ply applied to the inside surface what do you think?I used 3 layers of automotive fibberglass matt Ithink it is 5 once and for layers of 3/4 once glass .
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  23. #2048

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Bob what did you use to cut out your glass doors ? I have a band saw but I am afraid it will tear it to pieces . Would a ziz wheel be better?
    http://www.greatdanepro.com/Pray%20For%20America/index.htm

  24. #2049
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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Well I'm not Bob, but maybe this might be a solution for reinforcing the gear doors.

    http://www.bvmjets.com/Accessories/poly-ply.htm

    It's acutally called G10 and it's computer component board stuff, but if you buy it that way it comes in 3'x4' sheets...

    BVM will sell it to you in smaller pieces and it's available in three thicknesses.

    BVM suggests it's used specifically for gear doors as well as other things. I used the .020 thickness to build some cowl bafflling for a ZDZ-100 twin that's in my 33% Edge and it's great.

    As for cutting the fiberglass I think you're right about the bandsaw, but a whiz wheel is tuff to cut a straight line and what about the angles on the forward part of the doors?

    A whiz wheel would work to cut out the outsides of the doors since you can sand them straight afterward, but what about a coping saw for the centerline cuts?

    Just a couple of thoughts for you to consider.
    Zeeb

  25. #2050

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    RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

    Zeeb,
    when I was working on my fiberglass doors and came time to cut I used my trusty#11 xacto knife clamped the piece down cut& scored a few time and snapped then sanded the edge.it worked for me.


    George
    CORSAIR Brotherhood # 1
    Remember, Man\'\'s 2nd greatest adventure is FLYING, LANDING is his FIRST.


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