sig LT40 c.g.
03-12-2004, 01:55 AM
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sig LT40 c.g.
I picked up a new lt40 with the bolt down wing at perry for $65.It was missing the landing gear and the ins.the only thing i need to know is the rec.CG.Got the plane so i could drop a rc skydiver from it.Already installed a saito 72,and built extra tall landing gear.any help on the CG would be great!
03-12-2004, 06:16 PM
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RE: sig LT40 c.g.
I sold my LT40 and the book for it last year. So I can't give you the mesurments. But its on the center of wing spar and after you fly it you can move it back farther if you want it more areobatic.
Randy
Randy
03-12-2004, 08:52 PM
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RE: sig LT40 c.g.
Yeah, Jody, just balance it on the spar. With that big four stroke, expect to put the battery well behind the servos.
I pulled the .40 two stroke out of mine, and will plug in a 12-year-old 48 Surpass I recently resurrected. Naturally, I cannot find my book either. But using the spar will get you in the ball park without any worries, and you can fine-tune from there.
.
I pulled the .40 two stroke out of mine, and will plug in a 12-year-old 48 Surpass I recently resurrected. Naturally, I cannot find my book either. But using the spar will get you in the ball park without any worries, and you can fine-tune from there.
.
03-12-2004, 09:04 PM
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RE: sig LT40 c.g.
Jody,
The CG is 3 1/2 to 4 1/4 from the leading edge.Start at 3 1/2.This is for the kit.I don't know if you got a kit or ARF,but it should be the same for both.
Later
Walt
The CG is 3 1/2 to 4 1/4 from the leading edge.Start at 3 1/2.This is for the kit.I don't know if you got a kit or ARF,but it should be the same for both.
Later
Walt
03-12-2004, 09:07 PM
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RE: sig LT40 c.g.
cool,i had a 72 and thought with the added 2.5 pounds of the jumper/release box and servo that this might work good together.I wont to ballance and fly the plane and then try to get the same C.G. with th jumper in place so that the plane flies the same with or with out the skydiver.
03-12-2004, 09:20 PM
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RE: sig LT40 c.g.
I didn't get mine down to actually see where it ended up but the other guys are probably rite,it usually ends up on the spar.Those numbers I gave you are out of the manual (kit).
I busted my wing in half a couple of years ago and took it home and layed it flat on the table and put the glue to it so it doesn't have any dihedral.I like it better this way.It's perfectly flat across.It'll work this way very well if your ever tempted.
Have fun
Walt
I busted my wing in half a couple of years ago and took it home and layed it flat on the table and put the glue to it so it doesn't have any dihedral.I like it better this way.It's perfectly flat across.It'll work this way very well if your ever tempted.
Have fun
Walt
03-12-2004, 09:33 PM
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RE: sig LT40 c.g.
Got a DP 540t with a DA50 for the 3d stuff.just wonted a good mule plane and something i could relax and enjoy.People laffed when i told them i wanted something that i did not half to think abought while buzzing around the field.When i found this arf new for $65 i could not say no!How do u think this plane will doo with the extra weight of a rc skydiver?
