I always wanted to have a mobile air compressor that would not be limited by the length of the power cable, I decided to build a compressor that would be driven by an internal combustion engine. I used a 160cc motor, 220l/min pump. The motor stops powering the air pump when the required air pressure is reached, so that the compressor does not have to be switched on continuously, the motor automatically starts powering the air pump when the pressure drops.