RE: 1/8 scale TopFlite Corsair Mods (Full Version)

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Chad Veich -> RE: 1/8 scale TopFlite Corsair Mods (7/17/2008 1:43:43 AM)


quote:

ORIGINAL: NCIS
I don't believe there are any Corsairs flying in the Midwest except when they have the EAA Oshkosh Fly In and Air Show.


Mike George has a flyable F4U-5FN based in Springfield, Illinoise.



DreamingTree1027 -> RE: 1/8 scale TopFlite Corsair Mods (7/18/2008 8:05:11 PM)

Thanks guys,

When I got this kit it came with retractable pneumatic landing gear, I wanted to be sure that they would work for this plane. They are Century Jet model retracts. They do rotate 90 deg but I am afraid they are too heavy and bulky. I am almost positive that the ones in the link are the ones I have. http://www.centuryjet.com/webstore/moreinfo.cfm?Product_ID=81 That is the link. Anyone else have century jet retracts opinions.

Sorry this is not technically following the forum topic but this has been a good place to ask ?'s about this model!

Also if anyone needs an extra set of plans I have several. They are copies, as I work at an Architecture/Engineering firm I can get copies of drawings this big.

Thanks in advance,
Flyin' Bryan



Chad Veich -> RE: 1/8 scale TopFlite Corsair Mods (7/19/2008 5:01:10 AM)

Bryan, I believe those CJM retracts are for the 75" span Brian Taylor design which Bob Holman kitted some years back. Substantially larger than what you would need for the smaller TF kit.



CorsairJock -> RE: 1/8 scale TopFlite Corsair Mods (7/19/2008 2:19:56 PM)

quote:

ORIGINAL: DreamingTree1027
............................ I am almost positive that the ones in the link are the ones I have.
http://www.centuryjet.com/webstore/moreinfo.cfm?Product_ID=81

.....................Sorry this is not technically following the forum topic but this has been a good place to ask ?'s about this model!

First off, the CenturyJet retracts which are made for the Top Flite 1/8 scale Corsair have 3/8" diameter struts, just like the ones in the link that you provided. This is the normal size for struts in this size Corsair (even the smallest Robart RoboStruts are 3/8" diameter).

Secondly, CenturyJet produces MANY simular size rotating retracts, which are specically designed for suchplanes such as various P-40s, Hellcats, the Kyosho Corsair, Hangar 9 Corsair, as well as the Top Flite Corsair (and Royal Corsair?). Each set is designed for those specific aircraft, with the only differences usually being strut length. In many cases, a set design for one aircraft could be used on another. Actually, I think that Hollman had a 1/8 scale Corsair offering at one time (same scale as Top Flite and Royal), so maybe they ARE the correct size.

So my question is: why are you "almost positive that the ones in the link are the ones" you have? What info do you have to support your theory?

The best thing to do would be to contact CenturyJet. Be sure to have your retracts nearby, with something to take measurements with.



DreamingTree1027 -> RE: 1/8 scale TopFlite Corsair Mods (7/19/2008 4:33:08 PM)

Actually after a little more research the retracts are Century Jet model #33325, and they will work for the top flight corsair.

Thanks for your help guys



DreamingTree1027 -> RE: 1/8 scale TopFlite Corsair Mods (7/23/2008 3:08:32 PM)

I got started on the stab, and am on my way (only about 99.8% to go[:D]) to a 1/8th scale version of a Corsair. Wooohooo.



Props4ever -> RE: 1/8 scale TopFlite Corsair Mods (8/2/2008 7:11:50 AM)

Hi,

I am about to start making horizontal stab for my model, i been going through this thread from beginning till 16pg, i didn't see anyone mentioning any mods that horizontal stab and elevator might need as compared to stock build. Can anyone of regulars of this thread link me to mod section that covers my concerned area. Thanks in advance.

Sammy
Ps, i will start cutting the parts for now untill i get the answer to my question.



CorsairJock -> RE: 1/8 scale TopFlite Corsair Mods (8/2/2008 10:28:38 AM)

There has been very little discussion on the stab and elevator, because their outlines are fairly accurate. About the about the only thing one could do would be give them a more accurate chord, by making it airfoild shaped (rather than flat).



Props4ever -> RE: 1/8 scale TopFlite Corsair Mods (8/2/2008 2:01:47 PM)

Thank you Corsair jock for your response, i will certainly try to make the airfoil in the chord and start building the stab and elevator now.

Sammy



Props4ever -> RE: 1/8 scale TopFlite Corsair Mods (8/2/2008 4:53:07 PM)

Second question for Corsair jock.

Would TF F4U cockpit kit work for my F2G with or w/out mods done to it?
I'm looking on buy one now. Plus would TF P-51 60sz Canopy work on my model or not?



CorsairJock -> RE: 1/8 scale TopFlite Corsair Mods (8/2/2008 8:33:01 PM)

Both would work, however: I have no idea how accurate either one is. The Top Flite cockpit kit leaves a lot to be desired, as far as accuaracy and detail, even for an F4U-1A ot D. I'm pretty sure the cockpit arrangements changed by the time Goodyear was making the F2Gs. I do not have any pics or documentaion on the F2G cockpit.
As for the canopy: I'm sure it would fit, but again: I don't know how accurate (or in-accurate) it would be.
Maybe Luke knows?



Props4ever -> RE: 1/8 scale TopFlite Corsair Mods (8/3/2008 4:08:07 AM)

Well this really doesn't answer my question. I know what you mean for the cockpit kit but as for canopy, Luke did said he will send a spare one but for last few days he hasn't returned any of my pms, so i really don't know.



rs_two_five -> RE: 1/8 scale TopFlite Corsair Mods (9/29/2008 8:57:25 AM)

Ok, so I'm still in the planning stages with building my Gold Ed TP kit. As far as modifications are concerned this is what I'm planning into the do;

Fuselage:

I agree with what what posted somewhere in the VERY early posts in here that the fuselage looks really "flat" from the waist line up. This, I'm hoping I can address and redesign the waistline up fuse sections. (F7-F11). I'm undecided if I will add a retract tail wheel, but I will be re-enforcing F9B in case I decide I'm going to try fabricating a tail wheel assembly. The nose will be shortened to accomplish a more scale appearance, along with the proper "beveled" under the cowl flaps.

I'm hoping someone might be able to help me determine the proper amount of incidence of the main wing and the elevator. I just can't find out how much the LE of each has to move upward to accomplish the scale amount.

Also, what was the general consensus, did the nose have to move backwards 1/2 inch? or was it that F1&F2 moved back 1/4 inch with shortening the cowl flaps by 1/4 inch...?

Main wing:

Tip reshape will be carried out. I think it adds to the kit SOOOOO much in scale appearance.

The main flaps I'm hoping to address as well, I would like to make the sizing between the ailerons and the flaps closer to the scale sizing. From every picture I've seen, I've noticed that the flaps seem to go deeper into the wing than the ailerons (can someone confirm this?), so the TE would actually have a "step" heading towards the tip.

Rotating retracts w/LG doors will be added.

Tail Section:

I will also be making the tail sections (fin/rudder & stab/elev) both have proper airfoil shape, and not the "flat piece of balsa look" that the kit came with. Along with the 1/64 plywood "sheeting" to complete the look of the rudder of the trim tab and the non cloth control surfaces.

One other question. But, does anyone know what changes happened to this kit during the "revision" I have the original TOPA0100 Gold Ed kit, and I can't source or find out any info on what exactly the revisions were? TF has since discontinued the "revision package" now, so I'm SOL on finding that one. I just wish I knew what was revised.

I thank you guys for creating the EXCELLENT thread, I knew there were small "inconsistencies" with R/C modeling, but man, this thread has really opened my eyes.




CorsairJock -> RE: 1/8 scale TopFlite Corsair Mods (9/29/2008 10:33:44 AM)

quote:

ORIGINAL: rs_two_five
...............................I'm hoping someone might be able to help me determine the proper amount of incidence of the main wing and the elevator. I just can't find out how much the LE of each has to move upward to accomplish the scale amount.


Full scale incidences are posted in post #5 (page 1), and general discussion of modifications to acheive proper incidences is in posts precceding and after this that post. Rocketman modified his, and he discusses what what did.


quote:

ORIGINAL: rs_two_five
...........Also, what was the general consensus, did the nose have to move backwards 1/2 inch? or was it that F1&F2 moved back 1/4 inch with shortening the cowl flaps by 1/4 inch...? ............................................


It's been a long time, but I believe that MAINLY the cowl needs to be shortned by about 1/4" (before adding the cowl flap ring), and the cowl flap ring could be shortened slightly also (maybe about 1/8 ~ 3/16"?). But the big thing in this area is making the front of the fuselage rounded. This not only makes it more scale, but also vastly improves engine cooling, without having to add air exit holes.

Also: don't forget the wingtips: they are WAY off from scale.



rs_two_five -> RE: 1/8 scale TopFlite Corsair Mods (9/30/2008 4:05:23 AM)

Yep, I've got the wing tips also included in my HUGE list of mods. So I've got one other question for you CorsairJock, when you added the 3/32" ply to the outboard edge of the rudder, did you just shave off the thickness of the ply into the already constructed control surface? I'm almost thinking due to plywood being so hard to shape it would almost be better to just "cap" the center section of the rudder, then do the extra details in thin balsa. Sort of like the picture included. I believe it would save any access weight from the tail, while still accomplishing the same final result of having a tail section that might take a endo. The overall rudder contour would be modified to match more closely to the original rudder assembly along with the antenna post added into the center core of the tail..

[IMG]http://i97.photobucket.com/albums/l225/rs_two_five/rudderidea.jpg[/IMG]



CorsairJock -> RE: 1/8 scale TopFlite Corsair Mods (9/30/2008 10:37:57 AM)

The plywood that I used is 1/64" thick, NOT 3/32". It will easily conform to the contour. Underneath it, I applied .007" thick x 1/4" wide strips of carbon fiber to further strengthen it. The 1/64" ply is available from most balsa wood/ hobby wood suppliers (check magazines for ads).
Except for the addtion of these 4 pieces (1 carbon strip each side, 1 ply 'frame' each side), and the re-shaping of the outline, my rudder according to Top Flite plans. Possibly some-one else added the 3/32" ply top piece that you mention?



MAReplicas -> RE: 1/8 scale TopFlite Corsair Mods (10/2/2008 11:35:34 PM)

You guys involved with these mods (CorsairJock and others) you guys rock. I was browsing and came across this thread. I too have a TP .60 size corsair I would like to get started with. Unfortunatly during my move the wing center section broke after a box flipped and landed on it. Throw away! So i've opted in putting together another wing (Built up) but I thought it would be easy to just go ahead and order the wing center section only.
After reading thru this thread, I think it would be easier to scratch build one with the correct scale.............Hhmmm, just a thought!

And last, I really like what you Corsair buffs have done.........Nice mods and looking models you've posted.....

Orlando



andernamen -> RE: 1/8 scale TopFlite Corsair Mods (10/7/2008 4:12:46 PM)

Corsair Help Please! My TF Corsair flies okay, but I checked the distance from the wingtips and the tail on each side only to discover a difference of about 3/4" to 1". When she flies, the ailerons are not centered (i.e. level flight, one is up, the other down). The rudder is straight and true. I can re-drill the blocks to correct the problem with the wings, but before I do, I'd like to get some opinions on what, if anything, this will do. This is not the original wing for the plane and I am the third or fourth owner. Any thoughts?



Chad Veich -> RE: 1/8 scale TopFlite Corsair Mods (10/7/2008 4:17:39 PM)

Check lateral balance before changing the wing, it may not be the out of square issue causing your problem.



andernamen -> RE: 1/8 scale TopFlite Corsair Mods (10/7/2008 5:52:55 PM)

Forgot to mention, the lateral balance is right on. I have weight added to one side of the wing.



rs_two_five -> RE: 1/8 scale TopFlite Corsair Mods (10/12/2008 8:55:48 AM)

So I've started my build. First step was to address the proper under cowl curve for the model. This is how I did it. I created a new fuselage former with 1 inch spacing between the normal F-2. I doubled the former on the aft side to accommodate final shaping once the fuse is covered with balsa so the leading edge doesn't get too thin. I will be glassing the whole aircraft using Minwax Polycrylic and some light Sig fiberglass cloth.

So, I'm really thinking I would like to set this aircraft up electric powered. What sized motor should I be looking to get. Keep in mind, it'll be glassed, TF cockpit, Robart retracts w/struts, retract tail wheel, flaps, possibly operating cowl flaps and hopefully running as close to scale sized prop (17-19 in 3 blade). Any ideas?

Anyways, on with a few pictures to show a little of the progression. I'm thinking the front of the A/C should be strong enough.

[IMG]http://i97.photobucket.com/albums/l225/rs_two_five/corsair%20build/DSC05454.jpg[/IMG]

[IMG]http://i97.photobucket.com/albums/l225/rs_two_five/corsair%20build/DSC05455.jpg[/IMG]

[IMG]http://i97.photobucket.com/albums/l225/rs_two_five/corsair%20build/DSC05453.jpg[/IMG]

[IMG]http://i97.photobucket.com/albums/l225/rs_two_five/corsair%20build/DSC05457.jpg[/IMG]



CorsairJock -> RE: 1/8 scale TopFlite Corsair Mods (10/12/2008 12:26:24 PM)

quote:

ORIGINAL: rs_two_five
So I've started my build. First step was to address the proper under cowl curve for the model. This is how I did it. I created a new fuselage former with 1 inch spacing between the normal F-2. I doubled the former on the aft side to accommodate final shaping once the fuse is covered with balsa so the leading edge doesn't get too thin. I will be glassing the whole aircraft using Minwax Polycrylic and some light Sig fiberglass cloth..................................


Your setup looks very simular to the method that I used on my highly modified Hangar 9 Corsair. If (WHEN) I do it over, I will add a little more gloth and expopy right where the foam meet the 2nd former, as it is too easy to sand too much down there when it comes time to prepare for finishing.


quote:

ORIGINAL: rs_two_five
........So, I'm really thinking I would like to set this aircraft up electric powered. What sized motor should I be looking to get. Keep in mind, it'll be glassed, TF cockpit, Robart retracts w/struts, retract tail wheel, flaps, possibly operating cowl flaps and hopefully running as close to scale sized prop (17-19 in 3 blade). Any ideas?................


I had to do a search, but finally found it: a Top Flite Corsair electric power build thread:
http://www.rcuniverse.com/forum/m_4131667/mpage_1/key_electric%2CTop%2CFlite%2CCorsair/tm.htm

It could probably use a little 'bump'.

As for scale size prop: the AXI 4130/20 could probaly swing a 3 blade Master Airscrew 16 x 8, but I wouldn't push it any farher than that. My AXI 4130/20 powered Hangar 9 Corsair is using a 3 blade M.A. 15 x 7, and it looks pretty darn good. Having exact scale size props might looks nice, but you start to encounter other problems as props size increases, such as:
1) More weight (those bigger props start weighing a lot more)
2) Less ground clearance, which can also lead to
3) greater likelyhood of incurring engine (electric motor) damage, and/ or
4) flip-overs when on the ground

My advice would be to use the above mentioned AXI motor with 3 blade 15 x 7, on 7 or 8 (LiPo) cell set-up.

quote:

ORIGINAL: andernamen
.................... My TF Corsair flies okay, but I checked the distance from the wingtips and the tail on each side only to discover a difference of about 3/4" to 1". When she flies, the ailerons are not centered (i.e. level flight, one is up, the other down). The rudder is straight and true. I can re-drill the blocks to correct the problem with the wings, but before I do, I'd like to get some opinions on what, if anything, this will do. This is not the original wing for the plane and I am the third or fourth owner. Any thoughts?


I have flown Corsairs that did not have the wings quite right, and from my experience: they seem to fly OK for the most part, but seem to fly a little less stable when in the landing mode (as in: they tend to tip stall a little quicker). My advice would be to re-drill the holes if necessary to get it straight (or at least: straighter).



chilie -> RE: 1/8 scale TopFlite Corsair Mods (10/13/2008 12:40:29 AM)

rs_two_five

Thanks for the suggestion. I have the first half of my corsair framed up and been trying to thing of a simple and light way of doing that curve. I planned on just layering light balsa and shaping it, but I like your idea a lot more!



rs_two_five -> RE: 1/8 scale TopFlite Corsair Mods (10/13/2008 7:07:41 AM)

thanks, I don't believe that there is too much extra weight up front, maybe an ounce or something. The hardest part about creating the former was to actually cut it. How I made the shape for the former was I ended up taking both F-2 and F-3 laying them on top of each other, tracing the outer most outline of each piece on a new piece of 1/8 lite ply, then cutting the former on a bandsaw. That way the new former is the size of the largest sections of both formers its resting between. After that, I cut the appropriate sized 1/8 notch out of the bottom edge (centerline) so the former would rest on the work surface and clear the forward frame, and I also cut the centerline "tank space" coping the shape and size of F-3. Once the former was glued into place, I used the GP 11" easy-touch sander, sanding front to rear only until the bar sander would barely touch both F-2 and F-3 at the same time. That way the new former was guaranteed to not protrude past the outline between the two stock formers and offset the look of the airframe.

The doubler on the rear side of the new former is actually the sections of F-2 that were removed to facilitate the bevel. Those were sanded and shaped to the new former after being glued into place.

Also, just to note, but the pink foam that is in the picture is only there for the photo purpose, both will be thrown out. I'm planning to cut/shape a new section after the fuse is sheeted and sanded so I'm not affecting the easy to remove foam.



Now, I've got a question for any of you that have the "revised" TF corsair kit with the updated plans. How far aft is the instrument panel mounted past F-5 when the TF cockpit kit is being used? Also, is the panel parallel to the fuselage formers (straight up and down) or is it sloped (around 30 degree's). I'm trying to figure that one out, and I'm stuck on trying to find the measurement. I hate not having the revised kit [:@] and for TF not being able to offer the "revision package" anymore.




rs_two_five -> RE: 1/8 scale TopFlite Corsair Mods (10/14/2008 2:19:38 PM)


quote:

ORIGINAL: rs_two_five

Now, I've got a question for any of you that have the "revised" TF corsair kit with the updated plans. How far aft is the instrument panel mounted past F-5 when the TF cockpit kit is being used? Also, is the panel parallel to the fuselage formers (straight up and down) or is it sloped (around 30 degree's). I'm trying to figure that one out, and I'm stuck on trying to find the measurement. I hate not having the revised kit [:@] and for TF not being able to offer the "revision package" anymore.




Anyone?



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