The big, single bearing allows the blade to rotate in pitch while
keeping centripetal acceleration from slinging the blade across the
airport. The force on a a prop blade this size is, very roughly, about
20 tons.
On the other hand, the force required to change the pitch of the blade,
at least on a comparable Hartzell prop, is about 20 pounds.

Joe wrote:
For all you prop gurus out there...

A ran across this drawing and something struck me as odd... why is the
prop blade only being held in with one bearing? Wouldn't it want to
rotate about this bearing slightly and put a lot of force on the pitch
change mechanism?

Or in other words, why isn't the blade held rigidly?

http://www.mt-propeller.com/pdf/datsheet/mtv-23.pdf


Joe