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Other › Problem with Trex SE
12-04-2005 02:48 AM  12 years agoPost 1
jax

rrApprentice

Baton Rouge, LA

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Just got my SE all put together, everything went fine with the setup as far as I can tell. Set the pitch curves and the throttle curves as I would normally do with a glow heli.

The problem that I am having is that when the SE spools up and gets light on the skids, it wants to tilt over to the left side (looking at the back of the heli). I have checked the swash plate and it is level all the way from bottom to top.

Any suggestions as to what to check would be greatly appreciated.

Jax

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12-04-2005 03:02 AM  12 years agoPost 2
KevinR

rrVeteran

Vancouver, BC Canada

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Does it tilt or drift left?
Any micro heli I've tried needs R/H 'aileron' input for lift off. I've never flown a larger gas heli so not sure if they do this or not. If not, it could just be that you're not use to it.
Maybe somebody else will chime in with other suggestions.

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12-04-2005 03:34 AM  12 years agoPost 3
Jim Cimino

rrKey Veteran

NE Pennsylvania

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I don't know if you have new servos or not, but I just had the same problem with my T-Rex and it was a tooth missing off one of the servo gears.
Jim

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12-04-2005 03:20 PM  12 years agoPost 4
jax

rrApprentice

Baton Rouge, LA

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SE

Kevin,

So what you are telling me is that you have to do a lot more compensation to lift of a elelctric heli, than you would a glow or gasser?

Anyone out there that has flown both electric and glows that can comment?


Jax

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12-04-2005 04:04 PM  12 years agoPost 5
cnk

rrApprentice

NJ

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I haven't flown glow helis. . .just electrics, but every electric that I have tilts to the left a little during takeoff. This is with my Blade CP, Voyager E, and Logo 10. I've gotten so used to it that I don't even really notice it anymore. I would say that if you don't experience this effect with glow, then you're probably correct in assuming it is only with electrics or possibly more pronounced.

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12-04-2005 04:57 PM  12 years agoPost 6
KevinR

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Vancouver, BC Canada

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So what you are telling me is that you have to do a lot more compensation to lift of a elelctric heli, than you would a glow or gasser?
It's a possibility, we'll have to wait for someone with experience flying both larger and smaller helis to let us know.

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12-04-2005 05:05 PM  12 years agoPost 7
Dr.Ben

rrMaster

Richmond, VA, USA

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Any CW rotation model wants ot tilt left at liftoff, even the big ones. You can even purchase skid shims which tilt the model to the right when it sits on the ground to minimize the drift as you come off the ground. Curtis has used them for years on his F3C models. I can see where a micro/mini, where everything tends to happen more quickly, would have a more pronounced tendency for the drift. I've not noticed it that much, but after nearly two decades of doing this stuff, I think I'm correcting for it subconsciously more than I might realize.

Ben Minor

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12-04-2005 05:41 PM  12 years agoPost 8
balbs

rrKey Veteran

Los Angeles, CA

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Just like Dr. Ben says, this is normal behaviour. In fact, some full scale helis have their shaft tilting slightly to the right to compensate for this torque effect.

Balbs

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12-04-2005 06:10 PM  12 years agoPost 9
Ozydego

rrKey Veteran

Westerville, Ohio

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"Ground effect" also plays into this, a heli flying low to the ground has a tendency to"walk" to the left from the ground wash.... after lifting off and getting out of the wash, is when you trim the heli to a stable hover, if it still has a left tendency.... about 3 feet should do it, assuming your not in an enclosed space, because then the wash plays havoc with a hover all the time.....

But Honey, I can't live with just stock.....

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12-04-2005 06:38 PM  12 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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As has been already stated, you'll end up with a bit of right aileron trim in a heli whose MR goes CW looking down from above. It's natural, and the result of having to compensate for the thrust being put out by the TR, pushing the heli to the left.

You can shim the skids as has been suggested, trim some right aileron in, and just learn to naturally compensate with your thumbs.

Dave

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