Thumpango
Seems that most of you are charged Brakes off to brakes on
I think you will find that in the commercial arena,
most places charge on the Hobbs. Have you noticed that when you cannot get the engine to fire up, the Hobbs still turns when you are cranking? Annoying, that.
Wear and tear (therefore maintanance) and fuel use is more closely related to Tach times.
Most clubs or syndicates (where the pilots own the plane) charge this way.
A commercial operation can therefore charge brakes off to brakes on, and not be too concerned, because tach time is hardly doing much in the idle. If people are honest, it works well, and the owner of the plane doesn't need to spend all that money putting a Hobbs in.
Maybe thats why you will ALWAYS find a Hobbs in a US rental plane
