Cirrus SR20 Terminology Flashcards

Flashcards covering general and meteorological terminology, engine power, performance and flight planning, and weight and balance for the Cirrus SR20 aircraft.

KCAS

Knots Calibrated Airspeed is the indicated airspeed corrected for position and instrument error. Calibrate airspeed is equal to true airspeed in standard atmosphere at sea level.

KIAS

Knots Indicated Airspeed is the speed shown on the airspeed indicator. The IAS values published in this handbook assume no instrument error.

KTAS

Knots True Airspeed is the airspeed expressed in knot relative to undisturbed air which is KCAS corrected for altitude and temperature.

VG

Best Glide Speed is the speed at which the greatest flight distance is attained per unit of altitude lost with power off.

Vo

Operating Maneuvering Speed is the maximum speed which application of full control movement will not overstress the airplane.

VFE

Maximum Flap Extended Speed is the highest speed permissible with wing flaps in a prescribed extended position.

VNO

Maximum Structural Cruising Speed is the speed that should not be exceeded except in smooth air, and then only with caution.

VNE

Never Exceed Speed is the speed that may not be exceeded at any time.

VPD

Maximum Demonstrated Parachute Deployment Speed is the maximum speed at which parachute deployment has been demonstrated.

Vs

Stalling Speed is the minimum steady flight speed at which the aircraft is controllable.

Vs 50%

Stalling Speed is minimum steady flight speed at which the aircraft is controllable with 50% flaps.

Vso

Stalling Speed is the minimum steady flight speed at which the aircraft is controllable in the landing configuration (100% flaps) at the most unfavorable weight and balance.

Vx

Best Angle of Climb Speed is the speed at which the airplane will obtain the highest altitude in a given horizontal distance. The best angle-of-climb speed normally increases slightly with altitude.

VY

Best Rate of Climb Speed is the speed at which the airplane will obtain the maximum increase in altitude per unit of time. The best rate-of-climb speed decreases slightly with altitude.

IMC

Instrument Meteorological Conditions are meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling less than minima for visual flight defined in 14 CFR 91.155.

ISA

International Standard Atmosphere is a standard day atmosphere where (1) the air is a dry perfect gas, (2) temperature at sea level is 15 °C, (3) the pressure at sea level is 29.92 in.Hg (1013.2 millibars), and (4) the temperature gradient from sea level to the altitude at which the temperature is -56.5 °C is -0.00198 °C/foot and zero above that altitude.

MSL

Mean Sea Level is the average height of the surface of the sea for all stages of tide. In this Handbook, altitude given as MSL is the altitude above the mean sea level. It is the altitude read from the altimeter when the altimeter's barometric adjustment has been set to the altimeter setting obtained from ground meteorological sources.

OAT

Outside Air Temperature is the free air static temperature obtained from in-flight temperature indications or from ground meteorological sources. It is expressed in either °C or °F.

PA

Pressure Altitude is the altitude read from the altimeter when the altimeter's barometric adjustment has been set to 29.92 in.Hg (1013.21 mb) corrected for position and instrument error. In this Handbook, altimeter instrument errors are assumed to be zero.

Standard Temperature

Standard Temperature is the temperature that would be found at a given pressure altitude in the standard atmosphere. It is 59 °F (15°C) at sea level pressure altitude and decreases approximately 4 °F (2 °C) for each 1000 feet of altitude increase. See ISA definition.

HP

Horsepower is the power developed by the engine.

MCP

Maximum Continuous Power is the maximum power that can be used continuously.

MAP

Manifold Pressure is the pressure measured in the engine's induction system expressed as in.Hg.

RPM

Revolutions Per Minute is engine rotational speed.

Static RPM

Static RPM is attained during a full-throttle engine runup when the airplane is on the ground and stationary.

g

One "g" is a quantity of acceleration equal to that of earth's gravity.

Demonstrated Crosswind Velocity

Demonstrated Crosswind Velocity is the velocity of the crosswind component for which adequate control of the airplane during taxi, takeoff, and landing was demonstrated during certification testing. Demonstrated crosswind is not considered to be limiting.

Service Ceiling

Service Ceiling is the maximum altitude at which the aircraft at maximum weight has the capability of climbing at a rate of 100 feet per minute.

GPH

Gallons Per Hour is the amount of fuel (in gallons) consumed by the per hour.

NMPG

Nautical Miles Per Gallon is the distance (in nautical miles) which can be expected per gallon of fuel consumed at a specific engine power setting and/or flight configuration.

Unusable Fuel

Unusable Fuel is the quantity of fuel that cannot be safely used in flight.

Usable Fuel

Usable Fuel is the fuel available for flight planning.

Reference Datum

Reference Datum is an imaginary vertical plane from which all horizontal distances are measured for balance purposes.

Tare

Tare is the weight of all items used to hold or position the airplane on the scales for weighing. Tare includes blocks, shims, and chocks. Tare weight must be subtracted from the associated scale reading.

Fuselage Station

Fuselage Station (FS) is a location along the fuselage measured in inches from the reference datum and expressed as a number. For example: A point 123 inches aft of the reference datum is FS 123.

CG

Center of Gravity is the point at which an would balance if suspended. Its distance from the reference datum is found by dividing the total moment by the total weight of the .

Arm

Arm is the horizontal distance from the reference datum to the center of gravity (CG) of an item. The 's arm is obtained by adding the 's individual moments and dividing the sum by the total weight.

Moment

Moment is the product of the