The realities of CPPs

[cthippo]

After getting feedback on various systems, I've settled on a single diesel with a CPP for the Kayak tender. I've done some reading on the theory of CPPs, but what are the realities?

How do the control systems differ from a fixed prop and marine gearbox?

How is engine RPM managed? Do you control it manually? Set it at a constant RPM? Set the pitch and let the engine adjust to the speed needed?

Is the reducing gear built into the CPP system or is a separate reducer required between the engine and drive?

I've seen sites mention a cost of around $2000 - $3000 for a suitable system for a 110-120 HP engine. Does this sound reasonable?

Are there any particular shafting or engine placement requirements?

Thanks

[apex1]

You say you have done some studies. Not the right publications obviously.

You should have included this:

http://www.boatdesign.net/forums/props/controllable-pitch-propeller-summary-30695.html

and probably you have the wrong people on your ignore list.

Richard