R
EVISION
:
-
D
ATE
:
12/29/04
P
AGE
:
8
Copyright
2004 Glasair Aviation, LLC Arlington, Washington All rights reserved
2-4.6 E
NGINE
C
RANKSHAFT
S
PEED
Lycoming O-360:
Maximum (red line)................................................................. 2,700 r.p.m.
Normal Operating (green arc) .......................................600–2,700 r.p.m.
NOTE
The
Lycoming O-360-A1A
has a restriction against continuous
operation between
1,900 and 2,200 (
±
50) r.p.m.
when
fitted with a Hartzell constant-speed propeller. This restricted
range is inferred from similar engine/propeller combinations
but can only be established definitively by a vibrational survey,
which has not yet been conducted at this writing. The
O-360-
A1F6
, on the other hand, has crankshaft counterweights that
permit use of the Hartzell prop throughout the engine’s
operating range without restriction. Both the
-A1A
and the
-A1F6
can also be used with a Sensenich fixed-
pitch propeller, but both engines have a restriction against
continuous operation between
2,150 and 2,350 r.p.m.
using
the Sensenich prop. The
O-360-A4M
is a solid-crank engine
that cannot be used with a constant-speed propeller, but has
no r.p.m. restrictions for the Sensenich fixed-pitch propeller.
2-5 VACUUM PRESSURE
Operating Range ................................................................. 4.3–5.9 in. Hg