Prop Slip Calculation

[QUOTE][The boat total weight with 550 lts of fuel, 150 ltrs water and 4 person on board is 2998 kgs/QUOTE]

The weight is really 3 tons ?

That would result in a rather high weight/power-ratio of 15 kg/PS.
This figure is rather high compared to my boat and maybe the reason for the high slippagge.

I think ratios of 10 kg/PS are more typical for comparable big ribs, aren't they ?

Greetings Nordy