retroaviation wrote:
T33driver wrote:
Gotta be fuel....better be fuel! If they leak a drop of oil, you got biggg problems.
Really?

Didn't know that. Sorry for the dumb question, but why is it such a big deal on a jet if it leaks oil? I mean, I realize it's not the same as a piston engine, but I wouldn't have thought it was all that uncommon.
Just tryin' to learn.
Gary
Some turbine engines vent a fair bit of oil (the Rolls Royce Viper, the P&W JT8), but the Rolls Royce Nene 10 vents verrrry little. In 20-25 hrs of flying between mx visits, the oil sump on my Rolls Nene never has to be serviced! The oil lubricates the bearing surfaces of the main rotating assembly and the bearings and gears in the wheelcase--all by a self-contained single-pressure wet sump system located in the bottom of the wheelcase. The wheelcase is an alloy housing on the front of the engine that contains the engine accessories like the starter motor, oil pumps, high press fuel pumps, tach. An accessory gearbox is mounted on the front of the wheelcase and drives the generator, hyd pump, and centrifugal oil breather. The oil pumps are designed to provide an oil supply in excess of engine needs and ports excess oil into the wheelcase via a pressure relief valve. It's a tight, self-contained system and anything more than a veryslight trace of oil is a red flag...I guess that's all I needed to say!
