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Old 08-29-2019, 10:01 AM
  #4  
solentlife
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Join Date: Oct 2010
Location: Ex UK Brit now in Latvia west coast - Ventspils
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At times I look at the Hobby King CoG set-up and try to figure out how to improve on it.

The HK page shows this :



Which as most people know - the Stinger in the frame should be inverted. That photo must be 'rigged' by fixing the arms rigid to hold it.

This is the problem :



That metal round section is a cup that sits on a ball joint on top of the leg. It is prevented from falling of the ball by a set screw threaded in under the ball. If you use that screw, then the balance arm is restricted in its movement, as the screw binds with the underside of the ball. Slacking off to working solution - the balance arm then can fall off !



As I said earlier - its OK for small to moderate sized models of say 1kg max .. but as long as they are not large such as sailplanes !

I have toyed with the idea of making an axle based pivot system instead of the ball joints. With as Wildflyer describes - long arms extending to catch the model if it tips when out of balance.
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