The ROTARY PRAGMA with the one rotor engine is finally doing taxi tests.
This is without cowling. Every thing, almost, is running good.
Temperatures were good with 160F for oil and water at 70F OAT. All
systems seem to be working as planed. I had to play a little bit with
the throttle setting for starting, but after a couple of times it became
real easy and it started every time. She is really wanting to fly now!
The recently reported blowout of the oil filter gasket was traced to two
causes. One was the oil I used. I concluded from the testing on the
stand that using 40 or 50 weight VR1 racing oil would be a good choice.
It did work on the test stand satisfactory. However, at 45F temperature
it is awfully thick, and my conclusion was it was a major contributor to
the blow out. The other thing was, the oil filter I used was a general
type filter. When I had a closer look at the design of the rubber gasket
and its placement in the filter body in different filters, especially on
an old Delco fro m one of my 1987/88 RX7 engines, I realized a
significant difference. These filters have an o-ring as a seal placed in
a groove which makes it possible to tighten the filter to the metal to
metal point keeping the rubber seal completely enclosed. Looking for
this kind of filter in the auto parts store led me to a K&N filter. It
is pricy at $15.00 but is the same seal design as that old Delco.
Using the K&N filter and W20/50 VR! oil solved the problem.
Richard Sohn
N2071U

http://www.fairpoint.net/~res12/home.html
DSC00015


Very cool Richard. We are finally going to see a one rotor
fly. If you have a stock oil pump in there oil pressure
when cold can be over 150 psi.