Do you base it on difficulty of the class or a percentage of the actual class cost?
Typically I do 10%, but I would like to know what's the acceptable standard. thx
My FBO charges for the airplane by the hobbs meter. If I turn off the master switch during flight do you think that would be an effective way to save money? Of course I would have a transceiver to do my radio calls.
EDIT: I'm not actually going to do this (it's a dumb idea). Just entertaining...
I was wondering imagine if I was to takeoff from Boulder, CO in a C172. The airport elevation is 5,300 MSL. How much would you lean the mixture for takeoff? I train in the very flat midwest and the highest airport elevation around here is 1000ft MSL so I never have to lean the mixture on takeoff.