105: PROPULSION FUNDAMENTALS
SH/HH-60F/H EAWS SPECIFIC
1. State the type model and characteristics of the engine used in the SH-60F/H.
a. T700-GE-401C- front driven turbo shaft engine.
2. Define the following acronyms/abbreviations.
a. DEC- digital electronic control
b. ESU- electronic sequencing unit
c. HMU- hydromechanical unit
d. LCF- load cycle fatigue
e. LDS- load demand spindle
f. Ng- gas generator speed
g. Np- power turbine speed
h. Nr- rotor speed
i. P3 compressor discharge pressure
j. PAS- power available spindle
k. T2- compressor inlet temp
l. TGT- turbine gas tem
3. State the three different pneumatic sources for engine start.
a. Out side air source
b. APU
c. Engine cross bleed
4. State the purpose of the Inlet Particle Separator (IPS).
To prevent foreign particles from entering the compressor. It consists of a swirl frame, collection scroll case, and an engine-driven blower. The swirl vanes impart rotation to the airflow, causing the particles to be thrown outward into the collection scroll. From the collection scroll, the foreign particles are dumped over board through a blower assembly.
5. State the purpose of the Hover Infrared Suppression System (HIRSS).
Installed on HH-60H model, reduces exhaust gas radiation and line of sight hot surfaces.
6. State the five main components of the H-60 power train.
a. Main transmission modules
b. Drive shafts
c. Oil cooler
d. Intermediate gear box
e. Tail gear box
7. State the primary and secondary function of the main transmission system
a. Drives and supports main rotor; drives tail rotor.
b. Drives electrical and hydraulic units.
8. State the purpose of the chip detectors used on the H-60.
a. Detect metal chips in the gearbox and send a signal to the cockpit indicating a chip has been detected.
b. The chip detector is fuzz burn off, for the fine shavings that magnetically get attached.
9. State the purpose of the Auxiliary Power Unit (APU).
a. Provides power (air) to the engines for engine start.
b. Provides power (air) to the environmental control system.
c. Provides power (electrical) for emergencies and for the backup pump.
10. State the purpose of the APU accumulator and the two methods of charging.
a. The accumulator is serviced with hydraulic fluid and nitrogen, when APU start is selected hydraulically fluid is sent to the APU starter for APU start.
b. Charging:
1. Back-up pump.
2. Manual hand pump.
11. State the purpose of the history recorder/counter.
To read engine conditions:
1. Hours.
2. Index.
3. LCF1 (LOAD CYCLE FATIGUE).
4. LCF2 (THERMO CYCLE FATIGUE).
12. State the types of fuel the T700 engines uses and their restrictions.
a. JP-5, Primary fuel (NATO Code F-44).
b. JP-8, flashpoint too low for shipboard use, Primary fuel (NATO Code F-34).
c. JP-4, not on the ship, Restricted fuel (NATO Code F-40).
13. State two conditions that would require an engine compressor cleaning.
a. Low engine power.
b. On a 60 hour.
14. State the goals of the vibration analysis program.
To increase useful life of components and structure on the H-60 helo by maintaining vibration levels within established practical limits.
Return to
Kunz and King's SH-60 EAWS Tutorial
For inputs, comments, or questions please contact:
AW1 Benjamin Kunz
kimberly.a.king@navy.mil
AZC(AW/NAC) Kimberly King