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Old 08-13-2009 | 10:05 AM
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Default RE: weight VS stability

i have the art tech corsair http://www.nitroplanes.com/20ar2f4uco3d.html

Im a metric person so im not sure if the weight of the plane is right in ounces, the scale said it was 1lb and 6.4oz (without the weight, i removed it)

all the jogging paths in my park are close to trees and lamp posts, they're not plane friendly
Old 08-13-2009 | 10:16 AM
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Default RE: weight VS stability

One thing you could to is take off the landing gear and hand launching and belly landing. This lightens the plane, reduces drag in the air, and the wheels won't get caught in the grass on landing. It also looks better in the air with no landing gear. If you do go this route, I suggest having a friend hand launch it for you the first time. Just give it a good stiff throw directly into the wind, throw the plane straight out, not up. Then after it picks up some speed, you can do a climbout and fly as normal. Then the landing is pretty much the same, just come in a couple of inches lower and set your belly down right to the ground.
Old 08-13-2009 | 10:31 AM
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Default RE: weight VS stability

ok il try hand launching next. I doubt the landing will be better though, the prop will hit the ground and all kinds of bad things might happen.

I trust ur judgment though and i will try it.
Old 08-13-2009 | 10:37 AM
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Default RE: weight VS stability

NitroPlanes claims the plane should weigh 20 ozs RTF. Yours weighs 22.4. Is that a big deal? It might not sound like much, but it means your plane is 10% overweight. They don't say what the wing area is. I've got a lot of experience with planes in this size range that I build out of balsa and don't like to see them get over 18 ounces with a Norvel .074 for power.

Is your plane equipped identically to the plane they claim weighs 20 ounces?

2.4 ozs of extra weight, I could frame 1/2 that plane with 2.4 ozs of balsa.
Old 08-13-2009 | 11:10 AM
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Default RE: weight VS stability

I have hand launched and belly landed a couple of electric planes and I have never broken a prop, even a big APC electric prop on a no fuselage park flyer. You should be fine and it is worth giving it a shot.
Old 08-13-2009 | 11:10 AM
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Default RE: weight VS stability

it was equipped identically when i first got it. those 2.4 ounces are most likely all the epoxy from repairs and the 2 massive chunks of foam that i glued onto the wing after it broke, I had to repair it with something, so i just cut away parts of the box it came in and glued them into the plane where parts were missing, it was made out of the same material i did not see a problem with it.

I will attempt to fly it again some time after monday. The weather is not favorable right now and im going camping for the weekend. (and i can tiring the plane)
Old 08-13-2009 | 12:15 PM
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Default RE: weight VS stability

Removing the gear should be a big help, plus I agree that warbirds look much better in the air this way.

It is hard to avoid weight gain with repairs. Gorilla Glue is good for mangled foam, it takes a very thin coat and it will expand into the gaps. This glue has some "give" to it, too. Buy a small bottle of it, a tiny amount goes a long way.
Old 08-13-2009 | 01:01 PM
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Default RE: weight VS stability

if you can find some gws park wheels they come in huge diameter but are very lite. A larger wheel will go thru the grass easier.
Old 08-13-2009 | 02:21 PM
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Default RE: weight VS stability

i just flew the plane without wheels in the park (the weather cleared up) and all i can say is WOW. It flew so much better i couldn't believe my eyes.

Before to keep the plane airborne i had to apply 3/4-full throttle, every time i slowed down it would pitch down, during level flight the plane never wanted to fly straight; in short it was a handful.
Now to keep the plane airborne i only need to apply 1/2 throttle, even for climb outs, and the plane is rock solid and keeps its heading at all speeds; most importantly landing was easy! As the plane slowed down it kept its heading, did not weaver or bank at all, until it came to a gentile stop on the grass. I was surprised at how slow it could fly while maintaining control, it was almost at walking speed.

I noticed that the gears have a cover plate attached to them that looks like it would create a lot of drag and instability, but I disregarded it thinking it wouldn't make a huge difference. I couldn't be more wrong; its like a totally different plane.

Many thanks to Allfat for suggesting the hand launch and to everyone else for your continued support.
Old 08-13-2009 | 02:41 PM
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Default RE: weight VS stability

No problem, I am glad it worked out for you!
Old 08-14-2009 | 07:09 AM
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Default RE: weight VS stability


ORIGINAL: sgt peanut



I noticed that the gears have a cover plate attached to them that looks like it would create a lot of drag and instability, but I disregarded it thinking it wouldn't make a huge difference. I couldn't be more wrong; its like a totally different plane.
Great!

The plates in front of the U/C legs are actually an attempt at a scale feature and they did have the dual purpose of doors and airbrakes!


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