Air Motor

• 60% efficient, Livermore [1]. Implies standard air motors are 10-20% efficient. But even with that - that is good.
• Compressor efficiency calculation, hard core - [2]
• Compressors are 60% efficiency and up [3]
• Anecdotal - 7% efficient [4]
• 1/2 to 2 hp drum mixers [5]
• 30 CFM to 1 hp [6]
• 28 cfm/hp [7]
• 1/2 hp specs - [8]. 1.4 cfm @90 PSI with 200 rpm.
• This one claims air motor piston - 40-50% efficient [9]. But if you include compressor - it is another half of this for 20%. So in practice - want 8 hours of night power? Need 300W - fans, 250W HD desktop, etc. 12W for LED bulbs.
• 1/3 hp motor $300 [10]