The T55L7C engine differs from the other T55L7 series
engines in the following ways: (1) an atomizing combustor is used as
opposed to the vaporizing type; (2) the 14 vaporizer "T" canes are
replaced by 28 dualorifice fuel spray nozzles for injecting fuel
into the combustor; (3) four ignitors and start fuel nozzles are
installed to ensure optimum ignition and flame propagation during
starting. However, only two of the four start fuel nozzles are used;
(4) a modified fuel control is used.
In addition, the T55L11A differs from the T55L7 series in
the following: (1)a twostage gas producer(GP) turbine is used; (2) a
more accurate electric torquemeter with an indicator reading in
percent of maximum torque; (3) five thermocouple probes, that measure
the gas temperature at the power turbine inlet; and (4) variable
inlet guide vanes to improve compressor efficiency.
5.5.
SPECIFICATION SUMMARY
Specifications for the T55L7, 7C and 11 engines used in
Army aircraft are summarized in the following chart.
150
Previous Page
