"Al" wrote in message ...
:
:
: There is also the issue of performance. As I understand it, alcohol
: doesn't produce as much horsepower per volume as does avgas. If I use a
: mogas that has alcohol in it, I don't have the "Get up and GO" that I used
: to have. On that hot day at high altitude, over an obstacle, which takeoff
: performance chart do I use?
:
: Al G
:
:

It is a power to weight issue. If you are pulling 28" at holding 2650 RPM, alcohol or gas it is the same power. You just
need to move more alcohol through the engine to do it. This is the primary reason there are special cars that can run
the e85 stuff - they have bigger carb jets so they can maintain the correct egr.

I suppose there would be issues on low pressure altitude days where and airplane engine may be starving for fuel (to
lean) if it is fed alcohol...