Paul,  The impossible has happened, I actually left the ground yesterday.  Flew for 3 hours.  Seems my prop is too big as cannot get over 6500 revs.  Currently discussing this with Lonnie Prince. The EGT went to over 1800 and then I assume burnt away for I now have a balmy 4-500 degrees.  Is there a probe that will stand this temp??  The alternative is to strap them to the outside of the pipe.  Not ideal, but may be an alternative.  Ran most of the time at 5000 revs, and wondered why I could only get 100 Kts, and then realised that the prop was only turning at 1700.  5000 rpm and 21.5 MAP.  Temps were a little too cold.  Water 135 and oil 145. What is the thinking on a thermostat?? Oils pressure was 80 psi, never moved.  Had over 80 litres of fuel added for the second flight of 2 hours and there is a lot remaining, so fuel consumption was low, as is indicated by the speed.  As you can see all very scientific, but when you consider that I was just waiting for that moment of dead silence to suddenly appear as it did twice with my Eggenfellner monstrosity, I was not in the mood to do many calculations.

 Neil.

Congratulations.

Better to use cowl flaps as it cuts the cooling drag when they are closed.
Well worth the trouble. It is worth 3 MPH on my 182.

Here are some pictures for the new guys.

What is the diameter of that prop? It could be too big as the
prop tips are running into the transonic wall.

Is 21.5" MAP the highest you have seen? Sounds like the air filters
are clogged.

Paul Lamar

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