"Peter MacPherson" wrote in message
newsqluc.14569$3x.7535@attbi_s54...
At what rpm do people see their vacuum pressure drop below an acceptable
level(3.2?).
I also have a standby vac with a low vac pressure red warning light. When
I
reduce power
to 1200-1300 rpm the vac pressure drops off and the red light comes on. I
thought in the
past the pressure would hold until around 1000 rpm. Does this seem to be
working properly?

TIA,
Pete

I don't get into the green on my C152 until I'm at 1200 RPM or so, but
some of the 172's at the local flight school will hold 5 at 1000 RPM just
fine.

--
Louis L. Perley III
N46000