This is a two cylinder Lego Pneumatic Engine (LPE) I put together as I had leftover technic beams and pneumatic components after building other projects. The engine provides a good array of power, I would just perfer it run smooth. For now the only item the engine powers is a 9V Technic motor to act as a generator for a lamp. I intend on building the 3-speed manual transmission from nxtprograms.com and using this to power it instead of an nxt motor. I make use of an Iwata Sprint Jet air compressor that is used for airbrushes. I can get up to 125 psi with it but the engine will run at 60 psi max as it uses the air.
3-speed transmission:
Integrated transmission:
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