At 2200 RPM I get a cruising speed of 4.6 knots with a 13 x 8 inch prop (2 blades); under full power I get nearly 5.5 knots. It seems that the boat is a little bit underpowered, but the sailing quality is not hampered by the lightweight engine and that is important for me.
The Laurin 28 is a Swedish built and constructed sturdy double-ender, named after the famous constructor Arvid Laurin. Click here to visit the home page of the Laurin 28 Society (mainly in Swedish, with some English).