irawnsley
New member
The Boat:
Tradewind 35
10 tons
35ft loa
Perkins Perahma 35 (34hp)
hurth gearbox 1.79:1
propelor 17ins x 9in pitch
The Problem:
Engine max RPM 3100 (out of gear)
Engine max RPM 2000 (in gear) the lack of revs makes her difficult to turn in tight confines as there is so little prop wash.
Have used prop calc (http://www.surfbaud.co.uk/wave/) and this gives ideal prop size as 15 ins x 11ins pitch
No problem so far, just change the prop you say, however have spoken to a profesional prop person in the trade who says don't believe the downloaded prop program and that the current prop (17 x 9) is indeed the correct size.
Before you ask I have checked the fuel flow (by passing the system with jerry can and there is no problem with supply, the engine runs sweetly with no smoke.
/forums/images/graemlins/confused.gifAny ideas please!!!
Tradewind 35
10 tons
35ft loa
Perkins Perahma 35 (34hp)
hurth gearbox 1.79:1
propelor 17ins x 9in pitch
The Problem:
Engine max RPM 3100 (out of gear)
Engine max RPM 2000 (in gear) the lack of revs makes her difficult to turn in tight confines as there is so little prop wash.
Have used prop calc (http://www.surfbaud.co.uk/wave/) and this gives ideal prop size as 15 ins x 11ins pitch
No problem so far, just change the prop you say, however have spoken to a profesional prop person in the trade who says don't believe the downloaded prop program and that the current prop (17 x 9) is indeed the correct size.
Before you ask I have checked the fuel flow (by passing the system with jerry can and there is no problem with supply, the engine runs sweetly with no smoke.
/forums/images/graemlins/confused.gifAny ideas please!!!