Was wondering if some one can verify these calculations for a 5.0 l VOLVO PENTA GL-J series Engine with a 1:50 SX Stern drive and 14.5 inch prop with 17 inch pitch.
The theoretical calculations I came up with were as follows.
WOT low range 4400 RPM = 2933RPM at Prop shaft with a 1:50 ratio gear box. with a 14.5 inch / 17 pitch prop this came to 76 km/kr or 41 knots , 47 mph.
WOT at 4800 = 3200 RPM at prop and 83 km/hr.
We were going to do some sea trials later this week and wanted to see where we stand if this is a correct reference in theory.
Many thanks
The theoretical calculations I came up with were as follows.
WOT low range 4400 RPM = 2933RPM at Prop shaft with a 1:50 ratio gear box. with a 14.5 inch / 17 pitch prop this came to 76 km/kr or 41 knots , 47 mph.
WOT at 4800 = 3200 RPM at prop and 83 km/hr.
We were going to do some sea trials later this week and wanted to see where we stand if this is a correct reference in theory.
Many thanks
