Ziroli P-61 Black Widow
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$575.00
| 11/6/2008
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Posts: 393
Joined: 5/25/2004 From: West,
TX, USA Status: offline
I have a scale question about the flaps. I think scale flaps look awesome. I know the widths are all screwed up. The TF method lets you use two straight pcs for the outer flaps, which leaves you just one segment to build up. I want to know about the length from back to front. I measured from TF plans at 2 7/16". I also measured flaps from a 1/72 dwg in Squadron Signals detail and scale book and got .425". I mutiply by 9 to convert to 1/8 scale and get 3 13/16. This means an additional 1 3/8 to the flaps. I also estimate the ailerons need another 1/4 inch. Again, I'm talking from TE to LE. The drawing in the book was drawn at 1/72. That doesn't mean it was printed to scale.
Has anyone else tried to estimate these. 1 3/8 seems like a bunch.
Posts: 1937
Joined: 4/14/2002 From: Parchment,
MI, USA Status: offline
OUTSTANDING Corsair, Pete! You've done a very remarkable job of transforming a not so scale kit (Top Flite) into a much more scale accurate, and great looking Corsair. Congrats and I sincerely hope all goes well with test flights and you enjoy her for years to come.
About the flaps and ailerons, YES the Top Flite drawings/ plans are off again. I beleive I posted scale drawings of the ailerons awhile back, but one thing to note: the leading edge to trailing edge distance is not constant, as there is a taper (not counting the rounded part. Also, drawings of the top will differ significantly from drawings of the bottom, especially with the flaps (more width on bottom than on top). I don't have the specs handy, and seeing as how I just got home from a 3 day work related trip to Knoxville, TN, it will have to wait some so I can get caught up on other things.
EDITED: Post #86 contains bottom view scale drawing of aileron and outboard flap
< Message edited by CorsairJock -- 6/17/2005 5:23:53 PM >
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Avatar: Electric Powered, Highly Modified Hangar 9 Corsair
Posts: 2065
Joined: 1/19/2002 From: Enterprise,
AL, USA Status: offline
Jim, Thanks a bunch for the kind words. I forgot to post the Exhaust. I made them as outlined early in the thread but used 1/4 aluminum tubing. Didn't have the 3/8 stuff. Still looks pretty good. JB welded together then mounted on 3 small dowels that were epoxied into the sheeting on a 45deg slant.
Pete
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Posts: 393
Joined: 5/25/2004 From: West,
TX, USA Status: offline
Jim
Don't get me wrong. I think the TF is a great kit for a first build. I'm almost finished with mine. But Luke, yourself, and others have sorta opened my eyes to the fact that you don't have to blindly follow the plans.
So, I started drawing the TF wing in CAD, and comparing to my 1/72 scale drawing that we all have. To my surprise, the general shape of the wing is pretty close. I did notice the top and bottom views differ. I am assuming the top sheeting partially covered the control surfaces. Is this correct? So I have been using the botttom view.
The TF wing span matches my drawing, and the distance from the LE of the wing to the TE edge of the inner flap (near the fuse) agrees with the scale drawing. The TF LE tapers 4.2 deg and I measure 3.8 deg on the drawing. The TF TE tapers 6 deg, and I measure 9 deg on the drawing.
In my opinion, if the wing tip was shaped correctly, and the control surfaces were made differently, The TF wing would look fairly realistic.
I have noticed that scale flaps would come awfully close to the landing gear bay.
Posts: 4
Joined: 7/31/2005 From: , AZ, USA Status: offline
hey this info is great. im building the top flite corsair also and i have some ? i have a retractable tailwheel and i have to doors on hinges. how could i make them be sprung down and have it so the tailwheel pulls them up. Also the canopy. i want to make it so it can slides. i want to use the standard canopy, what can i do to make it do that. i have my switch and air take line in it, so i need it to be able to open. i also want to be able to fly with it open in the air. and answers!! Thanks Juse
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Joined: 1/19/2002 From: Enterprise,
AL, USA Status: offline
Juse,
Welcome aboard
Can't speak to the tailwheel doors but the retractable canopy was done a few pages back by Arvid. He used the same technique Dionysusbacchus used on his Royal Corsair. Here is the link to that thread. Between these two you should be able to build a nice Corsair.
Posts: 1
Joined: 8/20/2005 From: Spencer, IA, USA Status: offline
Is the bomb release your using a "vortac bomb release"? I'm currently setting up my 1/4 scale cub to piggy back a glider. I was told to use the vortac bomb release as it is strong and stable. Where can I find one? Thanks
Posts: 1937
Joined: 4/14/2002 From: Parchment,
MI, USA Status: offline
Vortac Bomb Release: these are no longer in production. The owner of the company passed away several years ago, and apparantly no-one took the company over for the purpose of keeping it going (and unfortunately). Thus, ANY Vortac products are hard to come by these day (but not impossible).
Bird cage canopy: If you want one, you will most likely have to fabricate one yourself. I too would like to have one (or more) of this type of canopy, and vow that my next Corsair project will be an F4U-1 IF I ever find one. Some-one need to make a mold/ plug for it. And we're talking about the whole canopy here, not just the sliding part because the windshield is different also. I've asked Luke (Dion...) to see about making some up. If he does find the time to do so, I'll buy at least 2.
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There was 2 styles of bird cages the 1`st was a flat top(u-1),2`nd had a bubble top(u-2) when modelling either of these versions,they both had cut outsin the fuse, behind pilots head(see drawing)..IT wont be hard to make(cut-outs) ,but ,my research shows , some planes had glass and some were sheeted in with metal..The cut outs were intended so the pilot could look back over his shoulder..I think the bird cage is a good choice(either of them) not a lot of those done in a model.....
On the canopy note I`m doing a F4u-5 from my kit..I can`t use the kits canopy.It`s wrong for what I`m building...I picked up the Hanger 9 ARF canopy..It`s pretty close as far as the bubble portion but the wind screen is really off scale.I`m wondering if anybody knows of a good scale version,for an F4U-5....I can do something with the hanger 9 version ,but if there is a better canopy available I`d rather go that route...
< Message edited by D Bronk -- 8/21/2005 3:21:34 PM >
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Dave B. ------ Corsair Brotherhood # 11------- I am a,#11,cause,,I`m 10% Better,than a perfect "10".
Posts: 88
Joined: 10/24/2002 From: Christchurch, NEW ZEALAND Status: offline
My Corsair is progressing at a snail's pace, as I have been very busy with a business project. However, at last I have my sliding canopy done, a bit different from Luke's and Arvid's (no brass sliders, mostly ply and glass head pins). My question/challenge is how do we operate it in flight? I believe from many photos that pilots had the canopy open for most take-offs and most landings, and apparently quite often while cruising. So how do we shoe-horn a sevo and a mechanism in to move the canopy back and forth, and with no risk of stalling said servo? Any takers?
Posts: 1937
Joined: 4/14/2002 From: Parchment,
MI, USA Status: offline
Brian, You are correct about the canopy being open for landings and take-off. It was standard procedure, especially when operating from an aircraft carrier. Purpose was 2 fold: increase visibility & make it easir for pilot to escape in the event of a mishap. I now have sevral of Luke's birdcage canopies, intend to install at least 1 of them this coming winter, and intend to make it functional/ sliding. I'm thinking servo operated, but an air cylinder isn't out of the question.
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Posts: 75
Joined: 12/20/2003 From: BundabergQueensland, AUSTRALIA Status: offline
Hi Brian
I've just finished a 65" Mustang which I've used to test a number of ideas I'll use on my electric 1/6 scale Brian Taylor Corsair I'm now building. One of the ideas tried was a functioning canopy working in oposition with the radiator vent. This plane is also an electric version so cooling air either goes out thru the canopy when open or out the vent when the canopy is shut.
It seemed a simple idea to get a servo to slide the canopy but two problems arose. One was getting enough range of movement out of a standard servo which I solved by linking to a large lever arm pivoted across the fuselage which also drove the vent opening. The other problem was getting pure straight line movement so the canopy didn't bind anywhere thru it's travel.
I hope the pics show how I did this. Aftre trying all sorts of different ideas, I found that even the slightest curve in the pushrod movement would bind somewhere and only a true straight line motion would work reliably.
My Corsair will be different because the attachment point for the canopy will be at two points whereas the Mustang works from a single attachment point at the rear. I'm thinking air for my Corsair as a simpler way to get the length of travel needed and avoid the possibility of a stalled servo.
So cool when it works tho and well worth effort to get it working.
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RE: 1/8 scale TopFlite Corsair Mods - 
