Paul369 Tuesday, 01/09/18 11:14:57 AM Re: None Post # of 545 Check our our testing of 12/27/17, proving our Gas Expander. Go to RadMaxtech.com and click on the home page or on our Gallery page The reason it only shows for 33 sec. is because we are running it off compressed air. The compressor makes so much noise we chose to not let it recharge during this testing, thus the slowing down in Watts during the end of the video. It was tested many times and for longer durations.