Foamy oil

[richardm]

I ve seen many references and discussions about lube oil being aerated by a turbo.  Many use de aerator plates or other means in an attempt to separate the air from the oil.
I  can't find any reference to a de aerator system in a normal turbo charged engine , while I m pretty sure that the oil returning to the engine sump must also be foamy.

Does anyone know about a de aerator system on a piston engine ? If so could this be adapted to DIY jet engine ? 

I ve seen some commercial centrifugal de aerator  but those seem to work with pressurized oil. That s unusable on an oil return line.

Real jet engines use mechanically actuated  centrifugal air oil separators of uncritical use to us. Maybe one could be built and electricaly driven..

[racket]

Hi Richard

A nice little Paper that might shed some light core.ac.uk/download/pdf/4403473.pdf :-)

De-aerators are used on dry sump engines , a swirl pot at the oil tank return helps.

We tend to run severely undersized oil capacities with our engines , a decent sized truck turbo normally has several gallons in the sump

Cheers
John

[richardm]

Thanks for the link John! Interesting...