Prop Pitch speeds

[IvanK]

The source of the following is from a DB605 engine re builder and pertains to the DB605A Prop pitch system (not the DB601 but I believe the systems are pretty much the same) when operated in the Manual mode ...i.e. what we have in CLOD.

The Clock instrument 1 Hour represents 6 degrees, 10minutes represents 1 degree of Physical blade movement. The Pitch blade angle can be varied at 1 degree per second.

In the DB605 the propeller range was from 22degrees to 46 degrees.
So to transit the entire range would take 22 seconds.

My comments
Observing in cockpit Hurricane engine run up videos were the pilot exercises the prop from Full fine to coarse then back to fine it would seem that the British systems is very much quicker.