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Wait! Isn't your coolant out of the engine suppose to be higher than coolant in {:>). But, your temperatures look nice and reasonable for your rpm. You don't say how long you were running which of course is another factor - I assume steady state at 2500 rpm?

Bill, I normally shut off my engine by switching off the injectors, so it dies immediately, within 1 revolution or less. I'll try turning off the fuel pumps next time out and let you know how long it takes.

I'm glad to see you are collecting data - next you will have to show me your duct data - I really liked the way you mated your ducts to your forward cowl.

----- Original Message -----

From: Bill Schertz

To: Rotary motors in aircraft

Sent: Wednesday, May 30, 2007 8:27 PM

Subject: [FlyRotary] Engine data

Okay Ed,

Enclosed is a chart of some data from my second engine run. Clearly I have more work to do, since my coolant out temperature is higher than my coolant in temperature!! I thought I had the calibrations done, but they are different sensors so I will have to recalibrate them.

Looks like you can tell when the oil thermostat opened. Temp was climbing steadily and then leveled off.

Lots more work to do. The engine is running very rich, I think I need to use mode 3 to reduce injector flow rate. Also have the following phenomena -- when I shut off the fuel pumps, the engine continues to run just fine.I stopped the engine by shutting off the injectors.

My last experiment was plugging the inlet and outlet lines (they currently are drawing/returning to a 5 gallon can) and then starting the engine without turning on the fuel pump at all (there was residual pressure showing). The engine ran for 3 minutes, and really smoothed out as the fuel pressure dropped to about 8 psi, and the fuel rich indicator on the EM-2 moved down into a reasonable range.

I think what is happening is that the fuel filters are mounted horizontally, and can trap some air in the top of the filter, which then serves to maintain the flow to the engine.

How fast does your engine die when you shut off the fuel pump?

Bill Schertz

Bill Schertz
KIS Cruiser #4045

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