Set of 8 drawings for Arthur Leak's 3" & 5" x 3" Marine Compound Steam Engine. Whilst described as a 'small' engine, in reality this is only suitable for hulls OVER 25 foot, and up to 35 foot overall.

The engine has been designed to be built on a 5" lathe, and a milling machine such as a "Senior M1" - this has been largely achieved by making each cylinder and valve chest a separate casting. This is a substantial machine of robust construction designed for hard work. It will develop around 11 IHP at 120 psi and 450 rpm, at which steam consumption is conservatively estimated at 390 lbs per hour.

An inboard condenser and Edwards Air Pump are part of the design, but may be omitted if a keel condenser is preferred. The drawings have imperial dimensions.

A CONSTRUCTION MANUAL is available, as are castings (see window on left hand side of the home page for a full listing; the castings are so heavy our website calculator cannot cope with them!