Block III - Powerplants Flashcards
Danger areas of H-60R include:
Suction form #1 and #2 engine inlets, heat from #1 and 2 engine exhausts, heat from ECS exhaust on right side of A/C, exhaust from APU left side of A/C and main rotor arc and tail rotor blades.
H-60R Engine model name?
T700-GE-401C
Describe the H-60R Engine:
Front-driven turbo shaft engine, with 1,800 shaft horsepower.
What 4 Modules make up the engine?
Cold section module, hot section module, power turbine module, and accessory section module.
What 3 fuels are used on T700 engines?
The Primary fuel is JP-5 (NATO Code F-44) used for both shore and shipboard. The alternate fuel is JP-8 (NATO Code F-34), not used onboard ships due to a low flashpoint. The restricted fuel is JP-4 (NATO Code F-40).
Describe the Main Rotor Head:
Fully articulated rotor head and it rotates counterclockwise when viewed from above. The main rotor head transmits the movements of the flight controls to the four main rotor blades. When the main rotor head is rotating above 35%, centrifugal force pulls the anti-flap assemblies outward. This holds them in their unlocked positions to permit flapping of the main rotor blades.
Describe the Tail Rotor:
The tail rotor consists of two tail paddle assemblies. Each tail paddle consists of two tail rotor blades. The purpose of the tail rotor blades is to counteract the torque of the main rotor head and to provide directional control in the yaw axis.
H-60R Fuel cell locations?
The main fuel cells are located on the Port and Starboard sides, at the aft end of the cabin section. The lower third is self-sealing up to 7.62 rounds.
Fuel Cell capabilities and capacities?
Each main fuel cell is capable of holding a maximum of 300 gallons (2,040 pounds) of fuel. The External auxiliary fuel tanks (drop tanks) are capable of carrying one port and one starboard drop tank. Are carried on the left inboard and right inboard weapons stations. And have a maximum capacity of 120 gallons (816 pounds).
Describe Fuel flow control during fueling operations:
During fueling operations, the pre-check valves shall significantly reduce or stop fuel flow to main fuel cells within 5 – 10 seconds.
Fuel flow reduction or stoppage within 5 – 10 seconds indicates high level sensors are working properly.
What are the 2 methods to fuel an H-60?
Pressure fueling, the receptacle for which is located on the port side of the aircraft on the aft cabin section. The second is gravity fueling, which is located on the port side of the aircraft on the aft cabin section above the pressure refueling receptacle.
Describe Bleed Air:
There are three different pneumatic sources for engine start. They include external ground source, the APU and engine cross bleed.
The engines provide bleed-air for engine and inlet anti-icing, environmental control system (ECS) operation, and crossbleed engine starting.
Describe the 5 components of the H-60 power train:
Main transmission module, the drive shafts, the oil cooler, the intermediate gearbox and the tail gearbox.
Primary/Secondary functions of Main Transmission System?
The primary function of the main transmission system is to drive and support the main rotor and the tail rotor. The secondary function is to drive the accessory modules and the utility hydraulic system pump.
Main Transmission location/usage?
The Main transmission is located on top of the helicopter in the center of the main rotor pylon. It utilizes input power from the input modules to drive the main rotor head, tail drive shafts (via the tail takeoff flange), accessory modules, and utility hydraulic pump.
