Smoking Colt Engine

Description: This is a vacuum engine, or to be more technically accurate, an atmospheric engine. Intriguingly, on each stroke it ?swallows? a gulp of fire. Steam plumes from the aluminium ?chimney?, giving the whole thing the appearance of a smoking gun. Base measures 8x5?, height 6?, weighs 4-lb. KIT FORM, all parts fully machined, ready for final assembly, taking approximately 2hrs.