Oldmechthings
Well-Known Member
- Joined
- Jan 10, 2008
- Messages
- 153
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- 12
After building that one cylinder hot air engine, (my first post) and failing to get it to run, I was skeptical about one cylinder engines. I thought they might be a hoax. Then about a year ago I got another book on hot air engines written by Roy Darlington in England. Roy had a short chapter with a few pictures, only he called them Thermal-Acoustic engines. Then I got on the web and located a few more which even included some video clips of them running. That aroused my interest again so I proceeded to build one. I did not locate a plan, but there were pictures and good descriptions of construction.
Somewhat to my surprise, the darn thing runs, Not very fast, but about a steady 80 rpm. Don't ask me how or why, as I have no idea what makes it go. It seems to defy the laws of physics, at least as I understand them. For a piston engine to run it needs a pulsating pressure in the cylinder to push the piston back and forth. I would think applying heat to the tube would cause the air to expand and push the piston out where it would stay until the heat was removed and it cooled back down again.
It is unlikely that I'll build another one as I'm not much into building things that I do not understand
Somewhat to my surprise, the darn thing runs, Not very fast, but about a steady 80 rpm. Don't ask me how or why, as I have no idea what makes it go. It seems to defy the laws of physics, at least as I understand them. For a piston engine to run it needs a pulsating pressure in the cylinder to push the piston back and forth. I would think applying heat to the tube would cause the air to expand and push the piston out where it would stay until the heat was removed and it cooled back down again.
It is unlikely that I'll build another one as I'm not much into building things that I do not understand