On Thu, 20 Dec 2007 17:30:03 -0900, "Ron Webb"
wrote:

Thanks for the link. It had been a while since I had looked at the Contact!
web site.

The Belted Air Power belt drive is very similar to the Blanton drive. I'm
sure I'd rather buy it than build it. I'd heard they weren't selling the BAP
unit anymore. Anybody know?

I like the info in the old plans because it is one of the few cases I've
seen where a certificated engine was removed from a certificated aircraft,
then a properly converted auto engine was installed in it's place - with
everything on both sides weighed, and pictures of the scale. I've not seen
much with better first hand knowledge of weights. And nothing much has
changed.

I have made a collection of similar info, from every source I can find,
including a few of my own weights and measures. I still have the file
somewhere...I think.

As for the fuel burn info - that is not even in doubt! You can't run an air
cooled engine at the Stoicheometric point. Anybody with a pilot's license
will tell you that you run rich of peak, or get used to paying for valve
jobs among other things. Not so with a water cooled engine. Keeping the
mixture EXACTLY at stoich is the whole purpose of an Electronic Fuel
Injection system. I DO know something about that.

An engine running at Stoich 14.7:1 fuel air mixture WILL get better mileage
than one getting the same power at 10:1 mixture. How could it be otherwise?


Never heard of "agressive leaning" of air cooled aircraft engines?
Below peak power it is very viable

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