RE: 1/4 Scale F4U-1A Don Smith Plans Build  
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RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/20/2008 11:08:14 PM   
NCIS


 

Posts: 2715
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		I'm about done with the left wing tip panel and going to be starting the center section. Did anyone build the 2 small sections from ribs # 8 thru # 11 first or did you build it along with the center section as one big piece?

Gibbs

(in reply to NCIS)
       Post #: 426

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/21/2008 1:19:35 AM   
NCIS


 

Posts: 2715
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		Well I am test fitting all the ribs for fit and there are several that have to have there notch cut deep so they are flush on the top. I also am kida in a wondering mode right now over how to ben the hardwood pars that Don calls for. Even with balsa they would have to be soaking wet and bent a little at a time to get the right shape. I have thought of either notching with a V shape where the hardwood spard have to bend like I did for the wing tip washout and then after it's bent and permanently glued in place just epoxy the notches for strengh. What ya think? Here are some pics before I cut the notches deeper and cut off the flaps in the TE of the ribs except for the two #1 ribs.

Gibbs

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       Post #: 427

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/21/2008 2:29:50 AM   
cimara


 

Posts: 773
Joined: 9/1/2006
From: atlanta, GA, USA
Status: offline 		Try steaming them for an hour or longer clamp in place over night or longer remove the clamps and see if they hold there shape if they do then attach

_____________________________

Winston
Corsair BrotherHood #6

(in reply to NCIS)
       Post #: 428

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/21/2008 3:04:03 AM   
DreamingTree1027


 

Posts: 27
Joined: 5/30/2008
From: Peotone, IL, USA
Status: offline 		Hi guys I was wondering if anyone would be interested in a Top Flite corsair .60 kit, that I have. I was planning on building it but now I am in college and can't deal with being in different places all the time. I live in chicago go to school in Ohio and live in Butler PA over the summer. Building is just too difficult. There is an ad for it on RCU. http://www.rcuniverse.com/market/item.cfm?itemID=415897

I would love to build it but just can't, and want an arf of something so I can fly. If anyone wants to trade a aerobatic plane I would be interested.

Thanks

(in reply to cimara)
       Post #: 429

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/21/2008 8:12:24 AM   
braydand


 

Posts: 10
Joined: 7/4/2008
From: pensacola, FL, USA
Status: offline 		I am building a TF .60 f4u. the mods i am talking about to the bulkheads and to the nose of the aircraft, as well as adding extra support inside of the fuse for my mods. i built a lot of my servo platforms and hatch boxes on the frame then planked the fuse and i ill cut everything out later so the fuse will stay true. one mod im talking about is scale mod so that i can have the gas tank right infront of the cockpit like the real bird. its a little father back then the plans called for and a mod to the bulckheads was needed. i also did a little bit of predetail work like running wires for the light and what not.

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       Post #: 430

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/21/2008 1:54:20 PM   
rt3232


 

Posts: 2278
Joined: 12/4/2004
From: hastings, MN, USA
Status: online
Hi Gibbs

For those hard wood spars that have to bend, I would go with ether A/C spruce or some stright grain ash, and an easy steamer is 2" blk iron pipe capped one end and about 2 " longer than your bend needs fillabout 1/2 to 3/4 boil watter as needed and put spars in place and let dry, it is a slow process but works great

Bob T

(in reply to NCIS)
       Post #: 431

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/21/2008 10:55:17 PM   
NCIS


 

Posts: 2715
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		Since the whole middle section is plywood and doesn't call for shear webs between the top and bottom spars I have decided to go with Pat from Laser Cut USA who sent me hard balsa. I will use it and then put in shear webs which he said would take care of the difference in the spars. The center section's 1/8" thick spar braces will also be there on one side of the spars. He made my spar braces all in one piece with no need for splicing which cost him more to ship for the long box but he said it will be much stronger than having a spar brace as most kit cutters provide due to their customers demand like PCK etc.

Barry

PS: Also I intend on using a very thinned mixture of Z-Poxy finishing resin to soak into the spars once they are in place.

(in reply to rt3232)
       Post #: 432

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/23/2008 1:23:45 AM   
NCIS


 

Posts: 2715
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		Before I started gluing anything I called Darrell at Seirra to see if I needed to do anything special before gluing in the ribs. I am happy I did. A big mod had to be made on both sides for the gear to ribs 6 and 7 in front of the main spar brace. The Seirra gear calls for a 4" opening and the way Don drew it wouldn't work. I had to cut the two ribs #'s 6 & 7 on each side where they were notched for the main spar brace and then cut the tabs off the front that go into the LE spar brace. Then make a perpindicular line going up from the bottom of the widest opening at the ribs. They used to be angled and the top was only 2 1/8" wide. Now it's the same as the bottom 4 3/16" on each side for the gear. I already cut the # 6 ribs for the wheel but the kit cutter didn't make a laser line on th # 5 ribs and they need to be cut out also. I'm using Seirra's 8" wheels so I'm making them a little bigger than the exact 8" they are for Don's recommended 7 3/4" wheels. Im using triangular stock for the ribs where they hold the gear will use epoxy to make it strong. Hardwood triangular stock on the outside and balso on the inside per Darrells suggestion. 1/2" balsa on the inside and 3/4" hardwood on the outside. If you have already built your center section now would be a good time to fix Don's error in the rib layout. I'll add the rest of the hardwood later. Right now the font part of the 4 ribs are just tack glued in place until I get my gear and have a chance to double check everything.

Barry

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(in reply to NCIS)
       Post #: 433

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/23/2008 2:00:21 AM   
rack


 

Posts: 242
Joined: 9/8/2005
From: , IL, USA
Status: online 		dont soak your spars in z poxy dosnt do anything but make it crack easyer

(in reply to NCIS)
       Post #: 434

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/23/2008 2:04:51 AM   
rack


 

Posts: 242
Joined: 9/8/2005
From: , IL, USA
Status: online 		heres a 40%waco i started two weeks ago, all igot left to frame is the elevators

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       Post #: 435

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/23/2008 2:14:40 AM   
Chad Veich



Posts: 2803
Joined: 12/13/2001
From: Litchfield Park, AZ, USA
Status: offline 		I would laminate the spars from multiple pieces of something like 1/32" plywood.

(in reply to rack)
       Post #: 436

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/23/2008 2:33:02 PM   
DreamingTree1027


 

Posts: 27
Joined: 5/30/2008
From: Peotone, IL, USA
Status: offline 		The maximum angle of deflex on the flaps is 30 degrees when fully open. Hope that helps.

Thanks to Corsair Jock on the 1/8th scale TF corsair Mods thread.

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< Message edited by DreamingTree1027 -- 7/23/2008 2:39:30 PM >

(in reply to NCIS)
       Post #: 437

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/23/2008 6:26:28 PM   
NCIS


 

Posts: 2715
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		I got that same diagram from CorsairJock and used a protractor to get the same results 30 %. Thanks anyway for the help!

Barry

(in reply to DreamingTree1027)
       Post #: 438

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 7/25/2008 1:37:33 AM   
NCIS


 

Posts: 2715
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		Gotta run but I worked 7 hours on the center section today and did get the hardwood to bend submerging it in the bath tub with 3 gallons of pure amonina. Boy did that p... off the woman. It stunk up the whole house. Only good point is it really made my mother in law mad and she left. Hoo-Ray. Anyway here is how far I am on the center section. Somemore framing to go on the tip part of the centersection and a complete build of the left side center section extension. It add 4 ribs.

Gibbs

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(in reply to NCIS)