Logging some Navajo time

[TurboS7]

I agree both brands go to low pitch but one feathers and the other doesn't , at this point I am too lazy to take the time to figure it out.

 

[A Squared]

>>>>>I agree both brands go to low pitch but one feathers and the other doesn't

Hmmm, I'm looking at an Powerplant textbook which has cutaway diagrams of both Hartzell and McCauley feathering props for recip engines showing how each mechanism works. Each diagram is accompanied by text describing the operation of each, and both descriptions explain how the prop is feathered by the feathering spring and counterweights when the governor releases the oil pressure to the prop. Hartzell also manufactures props which incorperate a compressed nitrogen charge to help feather the blades.

I suppose that there may be some McCauley props which won't feather when oil pressure to the prop is lost, but it's not true that all McCauley props are like that

ISBN 1-56027-154-x pp 656-659 if you're interested

regards