Gary Wolf wrote:

Paul,
   Re - the innovation award, are those actually blind rivets holding the
driveshaft to the drive hub?

                                                        Gary Wolf

Yep. Nothing wrong with blind rivets as long as they are used within
their design spec. If the ID is 2 inches and there are  14 of them
with a shear load of 200 pounds apiece that is a torque capability
of 2800 inch pounds or 233 foot pounds.

That shaft may also be bonded in there with epoxy as well.
If the ID is 2 inches and the bond area is two inches long that
would give a torque of 37,680 inch pounds by itself or 3140 ft pounds
assuming the epoxy had a typical shear strength of 3000 psi.

Paul Lamar

Finn Lassen wrote:

Not to mention that a weak point is nice in case of a prop strike.

Finn

How are you coming on your airplane Finn? You should be close to flying it. 

Paul Lamar
 
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