"Harry Graham" schreef in bericht
...
Not quite what I had in mind. I am looking for the controllable pitch
prop. Being able to change the pitch on the go makes it very
economical,
although it will take a long time to pay off the prop with fuel savings.
The ability to go from full ahead to full astern without changing engine
speed is useful.

Try this:

http://www.hundestedpropeller.dk

Klaas