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| New project, semi internal combustion atmospheric engine! |
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| vtsteam:
It's going to be an interesting project, to say the least! Looking forward to it :coffee: :thumbup: |
| John Hill:
Someone tell me about glow plugs? What sort of glow plug would I need that would light the fuel air mixture being drawn into the cylinder? As far as I know the model aircraft engine glow plugs operate on some principle involving catalytic processes and pressure but there is no pressure in an atmospheric engine. (I actually glow plug is not what I want but someone did suggest it to me.) |
| S. Heslop:
Sounds like it could be similar to how I imagine this engine works. I'd love to find more information on this engine though, but what I think it's doing is igniting the fuel and then using the vacuum drawing the piston back in to turn the flywheels. |
| Jasonb:
Thats probably a Crossley which was an Otto Langen made under licence. It does indeed use a small flame that is drawn into the cylinder to ignite the gas and gravity plays a big part in helping the piston drop back down to start it all off agian. Speed is controlled by a valve on the exhaust which adjusts how quickly the piston decends, there is a ratchet arrangement on the gear that engages with the rack that forms the piston rod so the crankshaft is onlt driven on the power stroke. This is a video of first Otto which shows the pilot light being lit about 35 secs in. Its been modeled in several scales, all but one have resorted to a spark plug hidden under the engine. The one that worked correctly was 3/4 scale and about 7ft tall. Its on my list to build some time but I'm not in a hurry to do it, drawings are available from the states but mine will be a bit larger. J |
| Stilldrillin:
Simon. That engine is in the Museum of Science and Industry, Manchester. I chatted to the guy, as he prepared and started up. Then, I was so mesmerised, I almost forgot to film it! :palm: Thanks for the better vid, Jason. :thumbup: David D |
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