The Showcase > Engines

7 Cylinder Double Acting Steam Engine Complete

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crueby:
Here is my build of a 7 cylinder double-acting radial steam engine. It is not based on any real original engine, but is patterned loosely on the internal-combustion radial engines common on early aircraft. Being double-acting, there are 14 power strokes per revolution of the crankshaft, so it self-starts very easily, and runs at a fairly slow speed down to about 10 psi. For the video below, I had the air line from the compressor set up for 60 psi with a needle valve inline to control the air flow and speed, rather than adjusting the pressure regulator. I find this works much better, since if the engine gets under load or has a sticky spot and slows down, the pressure in the line goes up and gives the pistons a little more power.

The propeller for an engine this size would be quite large, and have to hang off the table, so in the interests of space and safety I put on a cut-down prop instead. It gives quite a good breeze even at slow speeds!

A couple pictures of the engine:





And here is a video of the engine running:
http://www.youtube.com/watch?v=qgd9PNxtx6E
Chris
 :cheers: :cheers:

cnr6400:
Runs and sounds fantastic Chris!  :ThumbsUp: :ThumbsUp: :ThumbsUp:

wagnmkr:
Now that is just plain fun!!! That sound is so realistic!!!


Well Done That Man!

 :cheers: :cheers: :cheers:

Tom

Admiral_dk:
That was quick - even by your standard  :Lol:

Looks good and runs well  :ThumbsUp:

Per     :cheers:

PaulR:
Another amazing engine! :NotWorthy:

For some reason the motion of the crank connections doesn't look like I expected it to (dunno what I was expecting but there you go!). What are you doing about lubrication? I might have missed the answer somewhere in the build thread but you're making engines quicker than I can read about them  :Lol:

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