On 5/29/2019 4:25 AM, Rogelio M. Serrano Jr. via KRnet wrote:
We need more data. This is experimental aviation and experiments need data to
succeed.
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In the case of the VW and Corvair I think we've learned where the
failure points are in using them in the KR. VW= carb's (a friend was
killed, engine quit, tried to turn back) heat / oil temp, valves, engine
case. Corvair was cranks but that may be corrected. I think others had
problems with internal gears, harmonic dampener, etc. The problem as I
see it is the engines are run outside their design envelope and exposed
to stresses they weren't designed for. No different than the time I
took a toilet bowl brush, taped it to a long stick, and cleaned the
debris from my gutter guards. Yes , it worked, but...it did a marginal
job and didn't last long. Certified engines quit too but they were
purpose built to handle the stresses that we put them through in the
environment we use them in. In our case it boils down to your risk
tolerance. What are you comfortable flying behind? As long as we are
free to "experiment", there will be "experimenters".
Larry Flesner
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