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Forum: Engines and Propulsion Systems 27-01-2020, 13:46
Replies: 44
Views: 7,149
Posted By a64pilot
Re: How does a diesel shut down

Yes, an absolute perfect vacuum is pretty much a neg 15 PSI, and that is way more than enough to do serious damage to your hand or other body part, a Diesel may approach that, a spark ignition motor...
Forum: Engines and Propulsion Systems 18-01-2020, 15:22
Replies: 44
Views: 7,149
Posted By a64pilot
Re: How does a diesel shut down

Return fuel serves several functions, for one many engines actually self bleed, my old 4JHE is one, the air goes out thru the return fuel. There are limits to how much air it will self bleed of...
Forum: Engines and Propulsion Systems 18-01-2020, 12:24
Replies: 44
Views: 7,149
Posted By a64pilot
Re: How does a diesel shut down

S76 is a civilian aircraft, so no.
However if it uses the GE T-701 engine, (CT7 civilian version) the LP boost pump is part of the engine, so yes some helicopters do suck fuel up to the engine, but...
Forum: Engines and Propulsion Systems 18-01-2020, 09:06
Replies: 44
Views: 7,149
Posted By a64pilot
Re: How does a diesel shut down

Understanding this is sort of important, many if not most all injection pumps can in fact suck fuel and the engine run, but in forming a vacuum, it’s possible to form a vapor bubble, which isn’t air,...
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