The Stuart Half Beam is a recent addition to our range. Based on the Stuart Beam this engine is relatively slow moving with the advantage of only requiring a small boiler to run. Under steam the intricate movement of the valve gear combined with the elegant rocking of the beam make this engine almost mesmerizing to watch. Please remember our sets of castings require the use of a lathe & milling machine to turn them into a working steam engine. Engine Description: Stuart Half Beam Engine Set of Unmachined Castings, Materials, Fixings & Drawings. Specifications: Length: 11 3/4 Inches. Flywheel Diameter.: 7 Inches. Cylinder Bore: 1 Inch Diameter. Cylinder Stroke: 2 Inches. Contents: Cast Iron: Baseplate, beam, beam support, A frames, pedestal, pulley, crank, cylinder, valve chest & cover, top & bottom cylinder covers, piston, flywheel. Brass: Slide valve, eccentric strap, valve operating block, glands, conrod bush, beam pivot support, crankshaft bearings, beam support bearings, valve gear bearings. Steel: Crankshaft, connecting rod, eccentric sheave, eccentric rod, clevis, crankpin, piston & valve rods, all materials for valve gear & beam pivot. Sundries: Detailed drawings, gaskets, viton O ring, gland packing, fixings pack. Manufacturer: Stuart Models Model / Part No: Half Beam Unmachined Set of Castings (34-50-71456)