Safety information regarding what is igniter's temperature of combustible

[Sojourner]

Concern about how much heat to start a Fire.

Whenever combustible material (including engine fuel or gas-vapor or wood or rubber or plastic or dry-grass) is near heat source of 700° F or higher is to shield it or move it away from it at a greater distance.

Remember this in your mind & heart...
"That All Combustible Material in general Will Beginning To Ignite at 700+°F"

So whenever you rework or add or remove heat-shield or limited-ventilation is to be-care-full using combustible material near it.

Also avoid any low temperature plastic material over-head in 250°F area or compartment. It will beginning in time to sagging or drips (about 400°F+ for most plastic) on to higher temperature parts....if over 700°F...then you will have fire on hand.

Remember "insulation" is only a "delayer" substance or system to control heat or cold respond to whatever want to be cooler or hotter.

Vertical air-flow between non-conducting metal shield & compartment will reduce heat transfer. Greater the air-flow the less heat transfer to next surface or conductor.

For your information....diesel engine's compression-stroke has to obtain air temp of at least 700°F with fine vapor fuel-mist before any explosion to take place. Greater cranking-speed the higher compression-temperature.

Been there & done many tests & retired at General Motor Engineering Staff at Warren, Mi. Remember the national news report about "Grass Fire from GM cars" with catalyst converter in 1974-5! That was one of my jobs to find the results. As long all cylinder is running but one....you are safe from making grass fire.

FWIW

Sojourn for Christ, Jerry

[plyonsMC9]

Thanks Jerry - Excellent post!   

Best Regards, Phil