PWR4360-59B
Senior Airman
- 379
- May 27, 2008
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Draining sumps not always an option. In some cases ie not on wing, they are very very hard to access. And the mess would be huge. Hmmm maybe rocker box drains.
I doubt it too, I don't see how it could get past the gears or vanes in the oil pump, since they wouldn't be moving with the engine not turning.
Speaking in very general terms, I really dont think you can have all the oil drain into the engine in a dry sump system.
I believe you may have a pump between the sump and engine that will prevent oil flow into the crankcase, again this is speaking in very general terms.Why not if the crankcase is below the tank, and has the volume to hold it? Well yeah not all the oil since at what ever level in the crankcase there would be hoses and oil coolers etc. but the tank can be empty and all oil in the system, or close to it, till it levels out with maybe a few inches left in the tank.