RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair

RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair
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RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 2:45:17 AM

rt3232

Posts: 2231
Joined: 12/4/2004
From: hastings, MN, USA
Status: offline

Hi Gibbs

Just my 2 pennys worth but if you look back in a coupla of the scale threads, if the wing has 2 deg's positive, then the horizontal stab has to have 11/2 deg's positive, this is what gives the bird the tail hi look, and your line down the fuss looks about right.

You also might want to check the "Vought Heritage" web site for info.

Your build is looking good

Cheers Bob t

Corsair Brotherhood #5

(in reply to NCIS)

Post #: 4501

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 2:54:20 PM

devens

Posts: 295
Joined: 12/27/2006
From: Decatur, IL, USA
Status: offline

Hey Gibbs,

Check this out! http://www.f4ucorsair.com/

Click on the "technical link on the left"
You should see a top and side view of a Corsair.

click on any part of the corsair and a section of the original drawing comes up. VERY COOL!!

It would be nice to have that all put together.

Anyway if you click on the front of Corsair in the side view you will see the thrust line. You can follow this through the Corsiar all the way to the tail. This should help you to get the tail side of the centerline close.

BTW the VFM 312 checkerboarders that is on another link on that page is what I am modeling. The nose art that you can't see in any of the aircraft photos is the background on the group photo on that page. It is a bulldog with devil horns, wings, and tail holding a 50 cal! I need to get that stencil made yet and its about that time for me. They also have a picture of their kill board. I would like to make a model of that too. I could display that next to my plane at flyins!

D

< Message edited by devens -- 5/25/2008 2:58:46 PM >

_____________________________

Corsair Brother #2, Waco Brother #80 AMA#497873 Member; Decatur Aero Commanders

(in reply to pappy 883)

Post #: 4502

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 3:04:42 PM

devens

Posts: 295
Joined: 12/27/2006
From: Decatur, IL, USA
Status: offline

OK I just ooked at the Vought Heritage website that Bob mentioned and they have the center line on their drawings also. Cool site I hadn't found that one yet!

_____________________________

Corsair Brother #2, Waco Brother #80 AMA#497873 Member; Decatur Aero Commanders

(in reply to devens)

Post #: 4503

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 3:10:48 PM

devens

Posts: 295
Joined: 12/27/2006
From: Decatur, IL, USA
Status: offline

OK I have a question. For guys that did the simulated "or real" wing ribs on the outter wing panel and covered them with Koverall, what did you do to finish them after the kaverall was applied. I am wondering if I should dope them then prime and paint or if I shouldn't dope and just paint. I want the fabric look but I don't want it to be pourus. I have already doped the edges and the wing rib tops.

_____________________________

Corsair Brother #2, Waco Brother #80 AMA#497873 Member; Decatur Aero Commanders

(in reply to devens)

Post #: 4504

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 6:31:23 PM

rt3232

Posts: 2231
Joined: 12/4/2004
From: hastings, MN, USA
Status: offline

Devans

Again my 2 pennys worth, as long as your paint is compatable with the dope, and don't rinkle or check, I would apply just enough dope to seal the fabric (maybe 3 coats) and then prime and paint

Cheers Bob T

(in reply to devens)

Post #: 4505

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 6:59:26 PM

rt3232

Posts: 2231
Joined: 12/4/2004
From: hastings, MN, USA
Status: offline

Ok Guys

Been trying to get my corsair ready for this season, So I have a question, After finaly getting the programing for the flaps on my fataba 8U strightened out so that they work from a 3 position switch. I am getting 5 deg's differance at full flap right to left I am using hitec 645MG's stock T/F set up, and have swaped them out twice, with the servos disconected the flaps will free fall from up to 45 deg's repeatedly, that is the mech-limit on the center flap, hooked up with no growl in the up position to mid pos 15deg's both are the same but when I go to full flaps (40 deg;s) the end point set in the transmitter I have the differance.

will check this out at 3 mistakes hi to see if it havs an effect in slow flight I sure don't want to cause a roll condition.

So sugestions please

Bob T

(in reply to rt3232)

Post #: 4506

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 7:32:02 PM

devens

Posts: 295
Joined: 12/27/2006
From: Decatur, IL, USA
Status: offline

Bob,

Am I correct to assume you are using a Y connector to one channel for the flaps? If so are the center points of both servos set at zero in the transmitter pointing the servo horn at the exact same angle? I guess what I am getting at is geometry "even slight thousandths difference" could add up at extreme difflection. When I use my hanger 9 digital throw meter I always find descrepencies from one surface to another. I would suggest using different channels for each flap side. On my 9303 I can even adjust the rate that the flap delpoys. That is great to fine tune symetry!

D

_____________________________

Corsair Brother #2, Waco Brother #80 AMA#497873 Member; Decatur Aero Commanders

(in reply to rt3232)

Post #: 4507

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 7:48:12 PM

NCIS

Posts: 2633
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline

pappy 883,

Yes wing 2 degrees pos and stab 1 1/4 degrees pos. Plus Bob and devens I couldn't get that site to come up on my computer.

Gibbs

(in reply to pappy 883)

Post #: 4508

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/25/2008 8:09:28 PM

Zeeb

Posts: 1789
Joined: 11/11/2004
From: Pleasant Grove, UT, USA
Status: offline

quote:

ORIGINAL: rt3232

Ok Guys

Been trying to get my corsair ready for this season, So I have a question, After finaly getting the programing for the flaps on my fataba 8U strightened out so that they work from a 3 position switch. I am getting 5 deg's differance at full flap right to left I am using hitec 645MG's stock T/F set up, and have swaped them out twice, with the servos disconected the flaps will free fall from up to 45 deg's repeatedly, that is the mech-limit on the center flap, hooked up with no growl in the up position to mid pos 15deg's both are the same but when I go to full flaps (40 deg;s) the end point set in the transmitter I have the differance.

will check this out at 3 mistakes hi to see if it havs an effect in slow flight I sure don't want to cause a roll condition.

So sugestions please

Bob T

Well you're going to have a substantial roll induced by that difference in the flaps. Unfortunately that matching of different servos is a weak point in the Futaba radio. It has to do with the way control inputs are translated and sent to the rx. My brother is using a 9C on his Mustang and that has the same issues especially the dual elevator servos matching although it's not nearly the issue on a Warbird as it is an IMAC model since the control deflections are not as great.

Now if you're running the X9303, then the matching is much easier but I'm going to suggest that you use a Futaba MSA-10 or JR Matchbox to mate up your flap servos as that's what I've suggested to my brother. Those are essentially the same thing from the two manufacturers and allow you to independently adjust centers, direction of travel and endpoints of the servos.

I'm not a fan of Y harnesses in anything but maybe smaller glow models where differences in deflection are not much of an issue either, but for big gasser stuff I prefer something a bit more versitile and most important, reliable.

Just my .02 worth...

_____________________________

Zeeb

(in reply to rt3232)

Post #: 4509

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/26/2008 12:34:08 AM

rt3232

Posts: 2231
Joined: 12/4/2004
From: hastings, MN, USA
Status: offline

Gibbs

Go to google and at search type in the link and it should come up.

Bob t

(in reply to NCIS)

Post #: 4510

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/26/2008 12:55:18 AM

rt3232

Posts: 2231
Joined: 12/4/2004
From: hastings, MN, USA
Status: offline

Guys

I realy thank you for your comments, and yes I am using a Y harness, Like I said I have switched out the servo's and the Y harness, If you have looked at he stock system, a 1/2 turn on a 4-40 thread can be to much , it seams that the 645MG servo are not as identical/close as I thought, but when I leave the flaps on the 6 chnl knob I get the correct repeat both sides, One thing I learned last season is you don't need a lot over the 25 deg range to slow this bidr down even in no wind so may just limit myself to that. but will keep tinkering to see what I get and I will post my results

Bob T

(in reply to Zeeb)

Post #: 4511

RE: GROUP BUILD - Top Flite Giant Scale F4U C... - 5/26/2008 1:23:35 PM

rt3232

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