Goldstirling

The Quad Rocker engine is two Double Rocker engines incorporated into one engine. This the hardest engine to build but it is still easy compared to a 9 cylinder radial engine. It can be completed in a couple of months. It uses the same basic parts as the rest of the Goldstirling engines.

 A set  of mostly full scale drawing is $40, if orded with another set of plans the price would be $50 for both.

Consider building any one of the other Goldstirling engines before you tackle this one.