Way back on June 1 2007 I completed a Thermo Acoustic Engine that actually runs. Just don't ask me how or why, because I don't know. I had bought a book authored by Warbrooke over in New Zealand about building one, and I built it per the instructions, but that engine would not even attempt to run. I gave it up as a hoax. Then later I seen some videos on the Internet, and also acquired another book written by Roy Darlington in England. Roys book had a short 4 page chapter on them. No plans, but a good description, so I proceeded to build another one, and by golly it actually runs under its own power. Not very fast, but it does run. Here take a look.