B A R R Y wrote:
Orval Fairbairn wrote:

Sometimes, unscrupulous owners will wire the Hobbs to the master
switch, so you get charges whenever the MS is ON.

My Hobbs is on the master, but the airplane has never been rented.

Which brings up a very interesting question. I'm building a plane that will
be licensed as an Experimental. Once inspected I'll have to test fly for 40
hours for phase one. If I use a Hobbs as the official time and hook it to
the MS I would probably end up reducing the phase one time considerably.