View Full Version : Which Duoprop propellers

07-20-2009, 02:20 AM
"I have a 200hp volvo, that is running A1 duo props. The boat is 5.5t 33ft Flybridge and the maximum speed is only 15 knots at a stretch! Should I be running A2's or A3's. Is there anybody out there that has a similar configuration?"

07-25-2009, 06:11 PM

I had A3 on my boat, 34tf 5 tons, made 26 knots with a KAD42 with 230HP, you should probably use A2 or A3.
I assume you get full rpm on the engine?, if it is a 41 you should get app 3900 RPM."

12-22-2009, 04:14 PM
The propellors had given way at the hubs. I replaced them with a new set and what a difference. Like a new boat. I get 19kts no problems"

12-22-2009, 04:26 PM

Lucky you, I have -15`C, 50cm of snow and cars driving on the ice, instead of boats!!
My boat is resting for another 4 months covered in snow."

12-22-2009, 04:44 PM
Poor you!
We here in NZ are about to start our summer holidays and we plan to spend 2 weeks out on the water. I'll be thinking of you Martin.
Hey have a merry Christmas