TM 55-2840-251-23
Section X ENGINE TESTING (Continued)
1-93 GENERAL (Cont)
3. (Cont)
Wf
- Fuel flow
Ng
- Gas generator rpm
Nf
- Power turbine rpm
Np
- Propeller rpm
shp
- Shaft horsepower
T
- Torque
d (delta)
- Pressure observed/
pressure standard
q (theta)
- Temperature
observed tempera-
ture standard
SHP
- Shaft horsepower
corrected
s (sigma)
- Atmospheric density
ratio
4. The following ground safety precautions shall be
observed:
a.
General. To prevent injury to personnel and
damage to property, handling and working procedures
must be carefully followed. When handling or working
on turbine powered aircraft, not only must the propeller
area be avoided, but allowances must also be made for
the hot, high velocity exhaust gases discharged from the
exhaust stubs (see figure).
b.
Air Intake. The compressor inlet case design is
such
that
the
air
intake
velocity
is
very
low.
Nevertheless, the immediate area of the engine inlet
should be free of loose objects, sand, grit, rags, and
spilled fluids which could enter through the compressor
inlet screen and contaminate or damage the compressor
blades.
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