Get your air compressor or vacuum ready to run the world's smallest double-action steam engine MOC!

This record-breaking, working model features many details, such as:

• Moving 1x1 piston, for a record-breaking size and added realism and functionality.

• Moving 1x1 valve, making this engine actually run!

• Detailed exterior, with a moving speed governor, flywheel, crankshaft, bolt heads, and grease cups!

With 129 parts, this engine will complete any engine lover's collection!

PDF instructions included!

Size: 5.03 MB

Watch the YouTube video!