Paul and All,

Like the ring of that:) Currently oil is used to lubricate the apex seal
from wearing down the seal and the housing? Does the oil film do
anything else that would keep you from using a coating on the housing
and no oil such as seal cooling or sealing itself. This BAM coating is
said to be down in the 0.02 mu range while oil lubricated steel is in
the 0.16 mu area while being the third hardest material on the planet.
It was originally designed to be used in super high heat so I assume it
can take combustion heat.

I ask this because in the stated cause of the use of aluminum in
housings is because it keeps the inner surface temps of rotor housing
down low enough to keep the oil from braking down that is used to
lubricated the seals. Without the need for oil due to the BAM coatings
possible traits this would allow one to use any material the coating
will bond to. Side benefit would be reduced emissions I would imagine.

So which a coating that is hard enough and slick enough can we skip
using oil to lube the seals or is needed for another purpose.

Rob Woods

The oil cools the apex seals and that determines the amount
of oil required. Synthetic oils do not break down in the
rotary. If you put too much 2 cycle oil in to lube and cool
the apex seals it escapes into the sump increasing the oil
level there.

Paul Lamar