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| Fight against annoying power cuts! |
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| vtsteam:
My Lister diesel doesn't need electricity to run, so far, either. Awhile back, I was thinking about using a strand of solder as a mechanical fusible link that would break if the head overheated from loss of coolant, and allow a spring to shut the fuel rack. Wasn't sure where to put it -- probably near the exhaust manifold, and was going to check the engine when warmed up with an IR thermometer to find a workable location. |
| awemawson:
Steve would solder not melt at rather too high a temperature? Something like 'woods metal' or cerrocast, which are low melting point bismuth based alloys might be in a better range. Or butcher the wax cartridge from a vehicle thermostat, which after all are set at about the right temperature. |
| vtsteam:
Andrew, I think exhaust temps can be up there. The trick would be to find somewhere that normally doesn't get above say 300F. But rises rapidly if something goes wrong. Maybe even a fusible plug somewhere in the exhaust manifold, cast with an eye to hook the spring onto. I don't know -- didn't investigate it further for specific temps and materials. My Listeroid is water cooled, so coolant loss is a problem that an air-cooled engine wouldn't have. Though thinking about it -- exhaust temp probably would go up for oil loss, or over temp, too. In flying ultralights with air cooled 2 stroke engines EGT was constantly monitored, and gave faster indications than CHT (also monitored) |
| mattinker:
I understand why you like the idea that you can build an non-electric safety shut down, but it is running a generator, I don't see the point! Regards, Matthew. |
| awemawson:
--- Quote from: mattinker on December 17, 2014, 10:12:15 AM ---I understand why you like the idea that you can build an non-electric safety shut down, but it is running a generator, I don't see the point! Regards, Matthew. --- End quote --- Good point Matthew, and probably just needs a hold in solenoid in series with a bi-metallic strip. :clap: |
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