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Control Stick Design: Sizing the components

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Aerowerx

Well-Known Member
Joined
Dec 1, 2011
Messages
6,092
Location
Marion, Ohio
I have been doing a preliminary design of my control stick, and have been looking at various designs.

This is a section out of the Mini Max 1650 plans, showing their design for the control stick:

Capture.jpg

If you assume the maximum force of 167 pounds, as stated in Part 23, that a pilot can exert, would this apply to all the components, or is that the force applied to the control grip?

The tang that goes between the control stick and torque tube in the picture, when I calculate the size assuming it is a cantilever beam, I get a thickness value far greater than what is specified. I come up with 0.25 inches (using 4130 steel) when the 1650 plans specify only 0.125 inches.

I am using the 1650 just as an example, and am finding similar thickness values on other designs.

What am I missing here?

I hope this makes sense. It is 1:15 AM here and I am tired. But I have also been sipping on some Riesling while I try to relax:).
 
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