General POH/CH1 Flashcards
What model engine do we have?
Lycoming O-360-J2A
Classification of rotary system?
1) rigid
2) semi rigid
3) fully articulated
How many horse power does the engine have?
145BHP
Articulation of main rotor system in R22?
Rigid in plane, free to teeter and cone
Number of blades?
Two ( a semi rigid rotor system posses 2 main rotor blades)
Diameter of the main rotor
25 feet 2 inches
Blade chord
7.2 inches (constant)
Blade twist
-8°
Tip speed @ 100%RPM?
672 FPS
Articulation of the tail rotor?
Rigid inplane, free to teether
Number of blades
2
Blade chord of the tail rotor?
4 inches
Blade twist
0°
Precone angle
1° 11 minutes
Tip speed of the tail rotor @ 100 RPM
599 FPS
Drive system- engine to upper sheave
Two double eve belts with .8536:1 speed reducing ratio
Upper sheave
Spag type overrunning clutch
Drive line to main rotor
Spiral bevel gears with 11:47 speed reducing ratio
Drive line to tail rotor
Spiral-bevel gears with 3:2 speed increasing ratio
What is the power plant of R22
Model: Lycoming O-360-J2A
Type: four cylinder, horizontally opposed, direct drive, air cooled, carbureted, normally aspirated.
Displacement: 361.0cubic inches
Normal rating: 145BHP (derated) @2700 RPM(R22 Beta II)
Approved fuel grade: 100/130 grade aviation fuel
Total fuel tank capacity 28-30.7 gal useable fuel 26.3-29.7 gal
KIAS
Knots indicated airspeed is speed shown on the airspeed indicator.
KCAS
Knots calibrated airspeed, is speed shown on the airspeed indicator corrected for instrument and position error.
KTAS
Knots true airspeed, is airspeed relative to ur disturbed air. It is KCAS corrected for pressure altitude and temperature.
Vne
Never exceed airspeed
Vy
Speed for best rate of climb
MSL altitude
Altitude above sea level, in feet, indicated by the altimeter (corrected for position and instrument error) when the barometric sub scale is set to the atmospheric pressure existing at sea level.
Pressure altitude
Altitude in feet indicated by the altimeter(corrected for position and instrument error) when the barometric sub scale is set 29.92 inches of mercury(1013.2 mb)
Density altitude
Altitude in feet, in ISA conditions at which the air would have the same density(it is pressure altitude corrected for OAT).
ISA
International standard atmosphere exist when pressure is 29.92 inches of mercury at sea level, temperature is 15°C at sea level, and temperature decreases 1.98°C per 1000ft of altitude
BHP
Brake horsepower is actual output of the engine.
MAP
Manifold pressure in absolute pressure, in inches of mercury, in the engine intake manifold.
RPM
Revolution per minutiae or speed of engine or main rotor.(shown by tachometer as percentage of 2550 engine RPM or 510 main rotor RPM)
MCP
Maximum continuous power
TOP
Take off power(usually for a maximum of 5mins)
Critical altitude
Altitude at which full throttle produces maximum allowable power(MCP or TOP)
TOGW
Takeoff gross weight
OAT
Outside air temperature
CAT
Carburetor air temperature
CHT
Cylinder head temperature
GPH
Gallons per hour
AGL
Above ground level
IGE
In ground effect
OGE
Out of ground effect
ALT
Alternator