Bruce Greeff wrote in message ...
Hi

I was recently challenged to define Penetration.

A measure of the ratio of forward progress to altitude lost when
flying into a head wind.

The ability to make forward progress against a headwind while engaging
is sawtooth profile thermalling flight.

What a 1-26 hasn't got.

I'm glad I didn't dump the water!

With inadequate pentration the top of current climb is no further down
course than the top of the last one. The further down course it is,
the better the penetration.


Andy