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Kurt Haller RV-9A
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Date: 9-28-2018
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Number of Hours: 0.00
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Manual Reference:
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Brief Description: FIRST ENGINE START! (part II)
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Part 2 of 3
So reset alt air, and tried cranking without priming first. Nothing caught. Too lean? Slowly pushed in the mixture. Nada. What the hey? About 15 psi oil pressure was showing by this time, at least.
Well, Karl walked up behind the left wing, pointed at the glareshield, and said, "Weren't those fuses supposed to be put back in?" DUUUUUUUH! [Strike Three!!] I sheepishly put the fuses that let ship's power flow to the EMags in and...she starts! She runs!! Oil pressure 50 psi right after start.
But geez, she sure runs fast...pulled throttle completely closed, engine kinda rough, but still turning 1200 RPM. It sounds (thru the headset I was wearing) slower than a C172 at 20 Hz. The Emags should be generating their own power above 700 RPM, so let's push the test pushbutton switches that interrupt ship's power. And the engine promptly quit.
OK, let's restart. Whoops, throttle was in a bit more than 1/4. The RPMs hit redline! How can the engine redline at less than half-open throttle? Imposserous! Once pulled back to an alleged 1200 RPM, tried the EMag ship's power disconnect again--engine was off immediately. Alright, methinks I must not have set the pulses per rev on the Dynon to match the Emags. [Squawk One!]
Went through several more shut-down/restart cycles. Emags stayed on with indicated RPM anywhere between 2000 and 1700 RPM. Could have tried 1400 even, but I didn't. The sound at 2000 RPM indicated was a lot closer to a C172 at 1000 RPM. Gotta be mis-set bits in the 'lectronics.
Tried shutting off the P-leads to each Emag, one at a time. About 150 RPM drop in each case. Didn't look at EGTs, which go up with only one spark lighting off the power stroke (the charge is still burning when the exhaust valve opens).
About half-way through the stop-and-start cycles, I realized I didn't switch the alternator on. [Strike FOUR??!]. Once on and at 2000 iRPM (1000 actual), bus voltage was 14.4-14.5 V, exactly what it should be.
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Another vertical iPhone pic. Shoulda briefed the photog better
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