GWS j-3 Cub build question... - RC Groups
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May 19, 2004, 07:27 PM
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GWS j-3 Cub build question...


I have almost completed my cub. I am very pleased with it. I do, however, have a question regarding the linkage (wire) from the servo's to the contol arms. I find that the distance from one to the other is great enough to cause significant "flexing/bowing" when given TX commands. Is this normal? If not, what suggestions can you offer to remedy this?

Thanks,
Rod
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May 19, 2004, 09:18 PM
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bobbygee's Avatar
Quote:
Originally Posted by Rod Carson
I have almost completed my cub. I am very pleased with it. I do, however, have a question regarding the linkage (wire) from the servo's to the contol arms. I find that the distance from one to the other is great enough to cause significant "flexing/bowing" when given TX commands. Is this normal? If not, what suggestions can you offer to remedy this?

Thanks,
Rod

1.- Check to see that the rods aren't rubbing against something along their length.

2.- You may have too much throw in the control setup, so that it's maxing out the control surface movement while there's still movement left in the servo.

3.- If not 1 or 2, try a thicker ( stiffer ) control rod.

BobbyG
May 20, 2004, 12:05 PM
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cadconversions's Avatar
or support the control rod in the middle somewhere with a coffee stir. That size of pushrod that comes with the kit bows pretty easy but it's past the point of too much throw usually. I've got 5 yrs. experience but I'm building the same plane
May 20, 2004, 12:49 PM
Registered User
cadconversion-

Tell me a little more about a support in the middle....My only challenge is that the plane is now completed. Thus, making access to the control wires (where they cross especially) challenging at best...

Thanks gents-
May 20, 2004, 06:20 PM
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cadconversions's Avatar
Rod, I really wouldn't worry about them. The flex was noticeable in my pico FD but it didn't hurt the flight at all. I suspect the same for the cub.