In article ,
C J Campbell wrote:
I don't think it makes a lot of difference whether the airport is towered or
not. Why not just put a Hobbs meter in the plane?

It does have a Hobbs meter. But plane costs are mostly in units of Tach
time. At a towered airport you (probably?) spend more time taxiing and
therefore accumulate more Hobbs time per unit Tach.

So if you charge $66/hr wet hobbs and tach time is accumulating at 85%
as fast as the hobbs you have about $7765 of revenue per hundred tach
hours.

--
Ben Jackson

http://www.ben.com/