Steam Power Unit Development Society

90 Degree Vee, Double-acting, Compound Engine

2 3/8 inch X 4 3/4 inch X 3 1/2 inch stroke

SPUDS designed this engine in 1949, and made the castings but it was never built ... until now

These drawings were scanned from original blueprints or early copies of them

Some have not yet been de-spotted. The originals were drawn on linen and the ink ran!

Progress

• Low Pressure Crosshead slide before work began - 59kb
• The first cuts - beautiful, seasoned cast iron - 56kb
• LP crosshead slide, crank-end head and cylinder - 23kb

Detail drawing sections of larger drawings

• High Pressure Cylinder

  
  

• Low Pressure Cylinder

  
  

• High Pressure Valve

  
  
  

• Low Pressure Valve