Cessna172S Speeds

KCAS

Knots Calibrated Airspeed

airspeed corrected for position and instrument error

KIAS

Knots Indicated Airspeed

speed shown on the airspeed indicator in knots

KTAS

Knots True Airspeed

airspeed expressed in knots relative to undisturbed air, is KCAS corrected for altitude and temp

Va

Maneuvering speed

maximum speed at which full or abrupt control movements may be used without stressing airframe

2550lbs - 105kts

2200lbs - 98kts

1900lbs - 90kts

Vfe

Maximum Flap Extended Speed

highest speed permissible with flaps in extended position

10deg - 110kts

10-30deg - 85kts

Vno

Maximum Structural Cruising Speed 

speed that should not be exceeded except in smooth air with caution

129kts

Vne

Never Exceed Speed

never exceed this speed under any circumstance

163kts

Vs1

Stalling Speed/Minimum Steady Flight Speed

minimum speed at which the airplane is controlable 

48kts

Vso

Stalling Speed/minimum steady flight speed

minimum speed at which the airplane is controllable in landing config at most forward Center of Gravity

40kts

Vx

Best Angle-of-Climb Speed

speed at which results in greatest gain of altitude in a given horizontal distance

64kts

Vy

Best Rate-of-Climb speed

speed which results in greatest gain in altitude in any given time

73kts

Best Glide

Most efficient glide speed

68kias