It's a bit hard to get good photo's in such narrow hulls, and he has bolted down the original access
hatch.
We went out again on the weekend, fantastic, we were accompanied by a Mariner 34 which is a typical planning
power cruiser.
Both had Steyr motors.
The Mariner had replaced two 130 hp diesels with two 265 hp Steyrs, the Steys were considersbly lighter than the original motors even though they had much more
power.
An interesting calclation, the Mariner had a power to weight ratio of 60 Hp/tonne (a planning hull)
The power to weight ratio of the
Catamaran was 25hp/tonne.
Both do 20 knots
The
catamaran had a far better motion, cutting through the waves not over the top.
Does anyone else out there have experience with fast
displacement hulls and the power to weight ratio in use.
Today I will be checking on a fast
displacement ferry range (Citycat) to check on there p/w ratio. I am of the opinion with better
hull design we can get the P/W down to under twenty. (the grainger cat was designed as a sailing boat)