"Gig 601XL Builder" wrDOTgiaconaATsuddenlink.net wrote in message
...
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.


Maybe. At what RPM is your tach even with elapsed time?

All of the rentals and the only plane I have owned turn the tach faster than
elapsed time at higher RPM. (By the way, what do you call the counter thingy
in a tach?) My max RPM is 2650. I have to bring it back to around 2350 to be
even with elapsed time. That happens to be at the top of a restricted zone
so I would never be at an advantage using Hobbs to log flight time unless I
spent most of the flight idling around the airport.

I happened to do most of my renting from a club that charged by the tach
time. Everyone thought that was great - and maybe it was for students who do
less cruising - but the tach time was always more than elapsed for my
weekend trips.

Is there some specficiation or reg as to what RPM equals elapsed time? If
you're renting, fly slower. You'll log more hours cheaper. If your test
flying, fly faster. You'll chew up more tach time per elapsed hour.
-------------------------------
Travis
Lake N3094P
PWK