Glider cross-country time toward commercial SEL requrements?

Matt Michael wrote:
FAR 61.129 says "50 hours of cross-country flight of which at
least 10 hours must be in airplanes".

Blake Oliver wrote:
A "glider" is not defined as an "airplane", as per the FAR's.
Nice try though.

Please note that only 10 of the 50 hours must be in an "airplane", the
other 40 must be in an "aircraft". Those 40 hours could be in a
"glider". However, one must land at least 50 nm away from the point of
departure in order for a flight to count as "cross-country. So, if one
has 40 hours worth of cross-country flights where you land at least 50
nm away from home, you'll only need 10 hours of "airplane" cross-country
time to meet the requirements.

For example, I have about 750 hours of cross-country flight time in
gliders (most well over 200 miles), but nearly all ended up back at
home, or less than 25 miles away. So I only have 20 hours or so of
glider cross-country time from the FAA's perspective.

Marc