On 02/11/2014 02:03, wrote:

3. At full charge I can run the FES for approximately one hour. That
should get me theoretically 60 miles late in the day. Even if I could
self-launch, I do want to save every "volt" in case I need to
self-retrieve.

I think if you make a habit of self launching a FES, or even climbing
out from a low car launch, you could put a noticeable dent in the life
of the batteries. Battery replacement costs might neutralize the saving
in aerotow fees.

(The opportunity cost is another story).


Ian