Check this youtube video. Just imagine using this as a Ranger extender, the last part is even better. http://www.youtube.com/watch?v=QmqpGZv0YT4 Read more about the first Air motor of the video here. http://zeropollutionmotors.us/ But I really like that small rotary motor at the end. http://www.engineair.com.au/index.htm http://pesn.com/2006/05/11/9500269_Engineair_Compressed-Air_Motor/ Who need Fuel cell when you can you use Compressed Air???