The airframe maker often modifies the engine and
accessories, thus the POH is the authority. STC'd systems
modify that. So, if you and I keep posting sound advice,
perhaps the rest of the group will develop a higher level of
learning.


"Allen" wrote in message
.. .
|
| "Jim Macklin" wrote
in message
| ...
| Not exactly. It depends on whether the gauge is
calibrated
| to an exact temperature or whether the gauge is used
only to
| find relative peak and degrees above and below. It also
| depends on where the probe(s) are installed. EGT has
the
| probes about 4 inches past the exhaust valves,
|
| On single-probe EGT systems such as on John's Cessna 340
the probe is
| located toward the tail end of the exhaust riser, well
ahead of the turbo
| but past the 4" point. This was determined (by Cessna) to
be the point
| where the exhaust gas is hottest. Cessna POH for the 340
recommends running
| at peak for many power settings below about 62%. Cessna
designed their own
| exhaust systems on their twins, Beechcraft had TCM design
their exhaust as a
| unit with the engine.
|
| Allen
|
|