Flight Testing:

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May 4th, 2008 Flight Hours: 1.6 Total Hours: 8.7
6th Flight: Squawks: Correction:
With the engine performing properly, I decided to test the stall characteristics and speeds. I departed MMV to the SE. About 8 miles out and 4000msl I set up for power off stalls in the clean configuration. I performed four with the same results of 67kts IAS. Next I set up for the landing configuration. The first two were performed with the flaps at 55 deg, full deflection. I was surprised when the stall happened at 64kts IAS. I thought it would have been slower.

Next I decided to take a short cross-country. I started by heading Northwest over Yamhill and Gaston. I turned East from there and headed over to Wilsonville and UAO (Aurora). Seeing that I had only flown for under half an hour, I decided to fly South to CVO (Corvallis). While cruising the temps stabilized at 194deg f. I cruised at 4200 engine RPM, manifold pressure of 26.5 and 145kts IAS.

At Corvallis I made my first touch-n-go. The temps stabilized in the decent to 188deg f. During the climb-out they reached 214deg f and held there with 4800 engine RPM and 105kts. While returning to MMV, I cruised at 4200 engine RPM, manifold pressure of 24.5 and 140kts IAS.

A few miles outside of MMV I decided to try a couple more landing configuration stalls. This time I set up with only 45 deg of flaps. The stall speed again surprised me. This time with 61kts. I tried a couple more at 55 deg and found that it indeed stalled at 64kts and again at 45 deg and it stalled at 61kts. Interesting...

All of these numbers are without gear leg fairings and full-open cowl flaps.

Trace amounts of gear oil on belly this time. I think this was residual from the last two flights.

Mis-fire code predictable at very slow speed, decelerating. Still no detectable problem. Can fly without it coming on if I avoid the low RPM

Slight idle hunt when I let the engine RPM slow too much. Goes away setting a finer pitch on the prop.

I will need to monitor on the next couple flights before committing to a permanent, forward-facing gear box vent tube.

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