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View Full Version : Gws F4u Into F2g Super Corsair


K CLOSE
12-14-2005, 01:19 AM
Hi All, I usually just lurk around, read and learn, but Big Bird said some might be intrested in my latest conversion. It's humbeling seeing some of the models people do, and I just model for fun. I've been modeling since I was a kid, and my Dad was friends with Earl Van Gorder who gave me a fantastic start in the hobby. I love flying, and most GWS stuff fits my "cheap and cheerful" style.
I love the stock F4U, but the inexpensive slope glider made me give a super a try. These are early photos of the conversion, and i've finished the air scoop to the speed ring in balsa and am half done glassing. A lot of internal mods were made to the battery area and the motor mount-mostly hogging out and birch ply re-inforcements- but the pics were taken w/out me home.
I think it should fly well, and I am open to ideas. She going to be a brushless in-runner on a 400 d 'box and a 2250 11.1 lipoly. To those of you lucky enough to have the weather-- good flying, and more importantly safe landings.

K CLOSE
12-14-2005, 01:28 AM
For some reason my pics are too big. Anyone know how to shrink them?:confused:
GOT IT. NEVER MIND

John.G
12-14-2005, 03:01 AM
Sounds like you and I have the same idea as this is what I plan on doing as well.Got the first one and built it as it came and got a slope one and going to change it into the goodyear f2g super corsair.Maybe we can help out each other with info.I'm not ready to start mine as of yet but hope to in the new year.I will be using a himax 2015/4100 with gear 5/1 and maybe a four blade on it.I have a P-51 that I fly with a four blade and it can take a bit of abuse as I had flown it at the net fair this past fall and belly landed it,had a few flights with it until I broke the plane in half.Nothing that a little CA glue couldn't take care of.I'll keep on this post to see what happens.Thanks,John

K CLOSE
01-16-2006, 12:53 AM
Just an update on the build for anyone still reading this. I finished all my mod's and glassing. I did not post any pic's of this as glassing has enought threads of it's own. Currently painting/masking. Once in paint I'll post some more.

John.G
01-16-2006, 01:16 AM
looks good how did you lengthen the cowl as it looks good as well the removal of the deck looks right.Still haven't gotten to mine as working lots to get orders out at work hopfuly start on it soon.Thanks for update,John

K CLOSE
02-11-2006, 03:12 AM
I finally borrowed a camera and got these pic's. Have not flown her yet though:o

K CLOSE
02-11-2006, 03:23 AM
Here's some more pic's of the finished bird. They don't really do it justice, the effect in person, with the cowling and exhaust , is pretty good-if I do say so myself. Anyway- the battery is a 2250 11.1 e-tec, air duct blows air on to the battery. Thats why the hatch is screwed down. Oh, and it's one ht/bb naromax gws servo with bent rods.

Twmaster
02-11-2006, 03:34 AM
Cheap. Cheerful, COLORFUL! and Awesome!

:D

Don Sims
02-11-2006, 01:15 PM
K great looking plane, good luck on the maiden, it should fly as good as it looks!

Big_Bird
02-11-2006, 09:20 PM
K it really looks good. What is the all up weight with the battery installed?

By the way, excellent photo editing and resizing software is available here www.irfanview.com (http://www.irfanview.com) ......and it's free.

vicman
02-13-2006, 06:09 PM
FG-1 Lucky Gallon. All stock just the way it came from GWS but with a scale paint job. She has 2+ years worth of battle scars now but a geat plane!:cool:

Big_Bird
02-13-2006, 06:48 PM
Good looking pilot also.

vicman
02-13-2006, 07:40 PM
Thanks, He will turn 7 next month and has flown this one a few times but his main bird is a world models super stunts.

Jeremy Z
02-18-2006, 12:23 AM
A second vote for Irfanview. The coolest thing is that there are keyboard shortcuts for all the popular functions, so it is VERY fast, once you learn them. For instance, typing 'L' will rotate the picture left (CCW). 'S' = Save As. Select a box with the mouse and type Ctrl + Y and it crops.

Send a small donation to the guy who wrote it to keep him afloat.

Jeremy Z
02-18-2006, 12:25 AM
Oh, I got so wrapped up in the Irfanview thing that I forgot to tell you... It's probably going to be pretty heavy with a 2250 3S LiPo. You don't need this much power. It just necessitates that you fly faster to stay up, so you end up not gaining too much flight time.

I get only a minute or so more with my 1570 than with my 1320. (both are over 25 minutes in mixed, mostly half throttle flying with my 150 W Himax)

roccobro
02-18-2006, 12:50 AM
Nice plane and paint. I wouldn't want you to lose her with a bad batt connection. Replace the Tamiya connectors when you can. You'll be happy you did. :)

Justin

Jeremy Z
02-18-2006, 01:55 AM
Nice plane and paint. I wouldn't want you to lose her with a bad batt connection. Replace the Tamiya connectors when you can. You'll be happy you did. :)

Justin

I thought that was BS until I almost lost my T-Hawk to a Tamiya connector. They seemed to work just fine in my RC car days of the late 80s...

I'm running all Deans Ultra on my planes now. The APP connectors are well worth a look. No soldering, cheap connector prices, modular design. The only downside is that you have to buy an expensive crimper. But since the connectors themselves only cost 1/3 as much as Deans, it would pay for itself if you have a large fleet.

Big_Bird
02-18-2006, 02:00 AM
Jeremy, now that you have mastered IRFANVIEW, go to www.FastStone.org (http://www.FastStone.org) and download FastStone Image Viewer. Be sure to download the tutorial. If you liked IRFANVIEW, you are going to love this one.

Twmaster
02-18-2006, 02:00 AM
The APP connectors are nice. You can also solder them. Just keep in mind they are a bit heavier than the Deans also.

I'll drop my 2 cents (US) into the bucket here and add to the warning about Tamiya connectors. Bad ju-ju happens if you use them. I've even had them fail on my bone stock Tamiya cars and buggies.

Twmaster
02-18-2006, 02:06 AM
Jeremy, now that you have mastered IRFANVIEW, go to www.FastStone.org (http://www.FastStone.org) and download FastStone Image Viewer. Be sure to download the tutorial. If you liked IRFANVIEW, you are going to love this one.

Too bad it only runs on Microcrud PeeCees.....

:(

K CLOSE
02-18-2006, 07:01 AM
Tried to maiden her the other day. Didn't go well. I quess I'm pretty spoiled as most of my firsts go off really well. She is very heavy at 24oz, but I was looking for fast and wind stability so I didn't freak. My dad hand launched her, she diped down and I leveled her off. Never got her to climb during the entire 6 seconds of flight. Tipped a branch and went in HOT. Shattered the cowling and scoop, broke the plastic GSW motor mount for the brushless motor. The wing seperated but nothing else was damaged. If I had a second gearbox I would/could have tried again--glassed these things are alomost indestructable. I truly think it was a trim issue with a panicy pilot. I'll try again. As for the battery connectors I will likely change as everyone seems to hate these.:(

Big_Bird
02-18-2006, 06:01 PM
Too bad it only runs on Microcrud PeeCees.....

:(
Yea I know what you mean, we MS users just have to plod along on our 2 gigahertz mules and hope we make it up the next hill.:p

Big_Bird
02-18-2006, 06:06 PM
Tried to maiden her the other day. Didn't go well. I quess I'm pretty spoiled as most of my firsts go off really well. She is very heavy at 24oz, but I was looking for fast and wind stability so I didn't freak. My dad hand launched her, she diped down and I leveled her off. Never got her to climb during the entire 6 seconds of flight. Tipped a branch and went in HOT. Shattered the cowling and scoop, broke the plastic GSW motor mount for the brushless motor. The wing seperated but nothing else was damaged. If I had a second gearbox I would/could have tried again--glassed these things are alomost indestructable. I truly think it was a trim issue with a panicy pilot. I'll try again. As for the battery connectors I will likely change as everyone seems to hate these.:(
Sounds like your truly beautiful Corsair might excel as a hanger queen. An extra half pound is a lot to haul around on those little wings. Better luck with your next attempt.

Jeremy Z
02-18-2006, 11:46 PM
Tried to maiden her the other day. Didn't go well. I quess I'm pretty spoiled as most of my firsts go off really well. She is very heavy at 24oz,

SCREEECH!

The plane is designed to fly at 16 oz., give or take. 24 oz. is ungodly heavy for this plane. You say it will take a beating with the glassed wing, but indeed it is GOING to take a beating, being that heavy. Kind of a Catch-22.

You mentioned in your first post that it was going to be an inrunner brushless on a D gear, but you didn't mention any specifics. What's the kv of the motor and what's the gear ratio of a D gear in the GWS box? (forgive my ignorance) How many watts, to start with? Which propeller? As a next step, you might try shaving off a few oz. with a smaller battery. A 2250 mAh 3S is a behemoth.

Now that it is bashed up, hangar queen is not really an option.

As a point of reference for you, here was my setup:

AUW: 15 oz. (ThunderPower) 16 oz. (Apogee)
Motor: 150 W Himax 2812-0850 outrunner (850 kv)
Prop: GWS 9x7 SF (has nasty harmonic vibration) or APC 9x7.5 SF (much better)
Battery: ThunderPower 3S 1320 mAh (excellent) or Apogee 3S 1570 mAh (good)

With either of these setups, it will accelerate nearly vertically for quite a while before slowing down. There is certainly no lack of thrust.

If you are using the stock 10x4.7 SF prop, your problem is probably that you do not have enough speed to fly so heavy a bird. Since you have a brushless inrunner with a gearbox, you might try a prop with more pitch speed. (I assume you've got plenty of torque for this) The heavy planes need to fly faster with all else being equal. If that is the case, try the APC 9x7.5 SF prop.

But otherwise, let us know some more specifics so we can get you on the right track. I'm not big on the idea of hangar queens, especially not after it has already been crashed, hehehe.

roccobro
02-19-2006, 07:38 AM
How is your balance at 24 oz's? I put a Towerpro BM2410-21 (aka bp21) with a 8x4 on my GWS F4U and it is WAY faster than my 4200 himax in a GB with a 9x6, and uses the same current. But with the lighter motor, I have to cram a 3s TP1900 all the way up almost to the cowl to balance. Find a good Axi or other cheap outrunner that will haul around you 24 oz's and enjoy the beauty of no GB and enough power to get your pretty bird cruising around.

Hanger queens with alot of damage are reserved for those that have served you well and you just can't part with because of the memories. :)

Justin

Big_Bird
02-19-2006, 04:57 PM
K, honest, we are not picking on you. One thing that I notice about the GWS Corsair at 17 ounces (my Corsair weight) and light wind is that the plane can land fairly fast. This is no problem. However, I would have a lot of reservations about trying to land it at 24 ounces. Surely, the speed would almost double.

Here is a suggestion, order the slope version (no motor) for about 30 bucks + shipping. Build it light, no fiberglass. Put that good looking color scheme on it and use your original equipment. Put clear packing tape on the bottom of the wings for protection. Shoot for all up weight of 16 oz.

Repair it, make it look like new, and hang it up. Have fun flying your new Corsair.

K CLOSE
02-23-2006, 04:56 PM
Heres the motor data;
KV: 3000 RPM/V
No Load Current Io: 1.2A
Resistance: 82.5mOhm
Maximum Current: 40A
Average Current: 16A~20A
Motor Outter Diameter: 28mm or 1.1in (fit in directly to all GWS EPS400 series gear boxes or EMM400A and EMM400T direct drive motor mount)
Motor Length: 35mm or 1.389in
Motor Weight: 98g or 3.46oz
Shaft Diameter: 2.3mm(fit in directly to all GWS EPS400 series pinion gears)
Maximum Power: 250Watts
Magnet: Neodymium
Recommend Gear Box: GWS/AM-EPS3_D(3.00:1) (http://www.gwsexpert.com/product_info.php?products_id=741&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=f9718057f21baacde756eb067f3c42cf&osCAdminID=f9718057f21baacde756eb067f3c42cf) + EP1170 Propeller(approx. 1.6lb of static thrust) (http://www.gwsexpert.com/product_info.php?products_id=249&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=f9718057f21baacde756eb067f3c42cf&osCAdminID=f9718057f21baacde756eb067f3c42cf)
Recommend Direct-Drive Option: DS-002 drive shaft (http://www.gwsexpert.com/product_info.php?products_id=465&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=f9718057f21baacde756eb067f3c42cf&osCAdminID=f9718057f21baacde756eb067f3c42cf) + EP7035 (http://www.gwsexpert.com/product_info.php?products_id=240&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=59583b1908820fa2964dfa86cd35c763&osCAdminID=f9718057f21baacde756eb067f3c42cf&osCAdminID=f9718057f21baacde756eb067f3c42cf)propel lers
Recommend Speed Controller: EP Brushless 25Amps Speed Controller (http://www.gwsexpert.com/product_info.php?cPath=106&products_id=1016&osCAdminID=f9718057f21baacde756eb067f3c42cf)or EP Brushless 35Amps Speed Controller (http://www.gwsexpert.com/product_info.php?cPath=106&products_id=1017&osCAdminID=f9718057f21baacde756eb067f3c42cf)

Really, with this setup I should be able to fly a brick. I need to re-trim out the plane and try again. She was WAY to snappy on the controls for me to handle first time out. After the launch she built speed and started to sink, but a slight bit of up and she went vert ( about 8-10' ), stalled back down. Did this twice before I caught a branch and lost it. I'm gonna try to re-trim it and see how it goes. If it doesn't fly I'll put it up until I buy a bigger motor and / or my skills improve at flying ( I've only been flying for about a year- she may be unflyable or just beyond my skills).
Anyway, if it fails glassed, un-glassed it would surely work.:D

K CLOSE
03-31-2006, 05:57 AM
It Flys. Oh boy does it fly. I mustered the courage to try and fly the F2G today. This time I trimed it out slightly diffrently, hand launched it very hard and it climbed out nicely. It's very fast, the opinion at the field from those watching was between 70 and 80 mph. I really have no idea, I was way to busy trying to fly the thing. It really does fly well, it's just at the very limit of my ability. As pointed out by other posters landings are HOT. Glassed it really is very durable, hitting hard enough to damage some of my other planes badly with out a scratch. If I had it to do over I would not glass it to keep the weight down, and I would not clip the wings.
At least I don't have a hangar queen, but a plane that I can fly -when I muster up the courage.:D

Doppelganger
03-31-2006, 06:52 AM
Bravo to you. For having the courage to fly it, and sticking to your guns.;)

Steve

Big_Bird
03-31-2006, 03:57 PM
A big CONGRATULATIONS!

Bill Barnes Stormer
06-05-2008, 08:26 PM
Hello. I just joined up with Wattflyer today and was looking thru some articles. I ran across yours on the F2G. First off, I want to say that I've been in the model airplane hobby my entire life. My father got me started. He and his brothers were all die hard model aviation enthusiats. But anyways,,,I recently bought the GWS F4U Corsair foamie kit. After looking at it I wondered what it would take to replicate it to the meanest of all Corsairs, the F2G. I have several plans, drwings and original photographs of the ones that Cook Cleland flew at the Cleveland Air Races. What I would like to know is if you could send me some info as to convert this into one them. My e-mail address is AAFA1967@aol.com. Any information or tips would be greatly appreciated. Thank you for your help and taking the time to read this. By the way,,,,here's some trivia,,,,do you know what my screen name, Bill Barnes Stormer means? Just something to catch the eye and interest of some of the older aviation enthusiasts!! Thanks again,,,,,Charlie

K CLOSE
06-18-2008, 07:07 PM
PM Sent..

pd1
06-18-2008, 07:46 PM
Here's another thread on the GWS conversion.
http://www.rcgroups.com/forums/showthread.php?t=590632