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Post by Tom Goodrick on Oct 24, 2010 9:30:21 GMT -5
My AC500 has had the piston starting problem. Solutions have eluded us foryears.Today I stumbled on the fix.
Under Options/Controls/Assignments there is a Primer with nothing assigned for activation! All we have to do is assign a key or a button to it and the engine starts right up as soon as I pressed the primer button.
I was comparing the aircraft.cfg files for the AC560 with the AC500. The AC560 starts readily; the AC500 didn't. The AC560 has fuel-injected engines while the AC500 has carburated engines. Bingo! A light went on and I remembered always having to prime a carburated engine. I set that assignment and the engines started with Ctrl-E very nicely.
In some cases in the past I solved problems like this with adjustment of the startier torque. In this case I had set it the same (0.3) as the AC560. That had no effect. It kicked the rpm to about 150 which was plenty.
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Post by Tom Goodrick on Oct 24, 2010 16:56:41 GMT -5
Well, gee, I sure thought this worked once. Not all the time!
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Post by Allen Peterson on Oct 24, 2010 22:35:54 GMT -5
Well, I didn't want to rain on your parade, but I tried the primer fix and it did nothing for my Twin Comanche or my PA-23. Increasing the starter torque is the only thing that worked - at least for now. They both needed the starter to crank up about 500 rpm to get them to start. The position of the mixture and throttle seemed to have some effect, too. Changing the idle_rpm_mechanical_efficiency_scalar and idle_rpm_friction_scalar didn't seem to help. Some time back I installed a Primer Switch on the PA-23 panel, that didn't work either.
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