"Ron Natalie" wrote in message
m...
Not necessarily. The FAA just wants a consistent reasonably accurate way
of
recording time in service. Some aircraft, like late model Bonanza's (and
now my
Navion) don't even have a recording tach (no tach time at all). We use
the elapsed
time meter (hobbs).

What do you consider "late model Bonanza"? Every one I've looked at (from
1987 onward until they stopped making them in 1994 has one (at least in the
F33A model).

Guessing that Hobbs time is 25% higher than Tach time, I'd put a recording
tach in if it didn't have one already.