boatlover
Active Member
Hey all,
Did some speed testing in my boat last week. It has just been lifted, polished, anti fouled and was running light on fuel, about 10%. 30% water.
One thing though... there is a vibration on the port side when banking left so this may slightly reduce performance. My mechanic checked for play in the cutless bearing and said they seem fine.
props look ok, possibly rudder? Anyway here are the figures I got with a pretty smooth sea F3 on the stern
900 rpm - 29 l/h 9.3 knots ( would give a range of 890 miles... that I like! lol) About 3.1 litres per mile
1200 rpm - 69 l/h - 11.8 knots
1500 rpm - 111 l/h - 16.1 knots
1800 rpm - 212 l/h - 25 knots
1900 rpm - 180 l/h - 23.2 knots ( 7.75 liters per mile, prob the best fast cruising speed )
2000 rpm - 212 l/h - 25 knots
2100 rpm - 245 l/h - 26.8 knots
2200 rpm - 268 l/h - 28.1 knots (9.5 liters per mile - thirsty!)
I'll be opening a new thread soon - Im planning to leave end of May sailing from Ireland to Mallorca. Should be a fun trip
Already stocking up on the wine and beer plus naturally Jack Daniel's
BTW - I have shipped the boat to the Med and back from the Med. Im choosing to do it on its own bottom this time as its something I've always dreamed off... esp that nice big open Biscay patch of water... mmmmm
Did some speed testing in my boat last week. It has just been lifted, polished, anti fouled and was running light on fuel, about 10%. 30% water.
One thing though... there is a vibration on the port side when banking left so this may slightly reduce performance. My mechanic checked for play in the cutless bearing and said they seem fine.
props look ok, possibly rudder? Anyway here are the figures I got with a pretty smooth sea F3 on the stern
900 rpm - 29 l/h 9.3 knots ( would give a range of 890 miles... that I like! lol) About 3.1 litres per mile
1200 rpm - 69 l/h - 11.8 knots
1500 rpm - 111 l/h - 16.1 knots
1800 rpm - 212 l/h - 25 knots
1900 rpm - 180 l/h - 23.2 knots ( 7.75 liters per mile, prob the best fast cruising speed )
2000 rpm - 212 l/h - 25 knots
2100 rpm - 245 l/h - 26.8 knots
2200 rpm - 268 l/h - 28.1 knots (9.5 liters per mile - thirsty!)
I'll be opening a new thread soon - Im planning to leave end of May sailing from Ireland to Mallorca. Should be a fun trip
Already stocking up on the wine and beer plus naturally Jack Daniel's
BTW - I have shipped the boat to the Med and back from the Med. Im choosing to do it on its own bottom this time as its something I've always dreamed off... esp that nice big open Biscay patch of water... mmmmm
