David Megginson wrote > Andy Ross wrote: > > > But the idea behind YASim is to produce plausible results for all > > possible engines; oil pressure is one of those values that > is (AFAIK) > > just too engine-specific. > > Further to the point, here is some information from the > Lycoming O-320 > Operator's manual; it would make a good starting point for > horizontally-opposed piston engines. > > Oil Temperature: > > 180 degF desired, 245 degF maximum > [down to 160 degF and 210 degF below 10 degF OAT] > > Oil Pressure: > > Normal: 90 psi maximum, 60 psi minimum, 25 psi idling > Start and warm up: 100 psi maximum > > > All the best, >
The Merlin has a gear-driven oil pump and, I assume, a pressure relief valve. I was going to assume that oil pressure was a function of rpm with max and min values. Of course, it is also a function of oil temperature, which is a function of engine temperature. We already know egt. Are most of the building blocks in place already? If we don't want or need a sophisticated answer, then a function of rpm would be enough for an instrument, and that can easily be done in XML. Regards Vivian _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
