Indicated Airspeed Knot Turbulence 
Pilot Institute
JULY 11, 2025
Why don’t they use Indicated Airspeed just like the pilots who fly slower aircraft? Key Takeaways Mach number is a dimensionless ratio of true airspeed to local speed of sound. In terms of a formula, you can write it as: Mach number (M)= True Airspeed (TAS) / Speed of Sound (a) This means Mach 1 is the speed of sound, Mach 0.5
Plane and Pilot
JUNE 23, 2025
After a shallow turn from downwind, the Bonanza was positioned on base at a proper altitude and airspeed and with a constant descent rate. The wind at the surface was reported as 220 degrees at 6 knots gusting 19 knots. Increasing true airspeed makes the turn radius wider, resulting in an overshoot. Where is the wind?
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Air Facts
MAY 5, 2025
This particular 172 normally cruised at 120 mph indicated airspeed, but with the ice it would barely do 90 mph and that required full throttle! The general prognosis indicated no icing in the clouds, no turbulence and a quartering headwind from the west resulting in a mere five knots of headwind component.
Air Facts
OCTOBER 14, 2024
Turbulence Air Facts Journal Space is infinite in its complexity. And tampering our mental reserves with turbulent mischief. Turbulence is unpredictable. All three axis of an aircraft are subject to the vagaries of turbulence. Space is also infinite in its potential. And there in lurks the adventure.
Pilot's Life Blog
APRIL 9, 2024
Static vents that measure static pressures are usually on the lower side of the plane, where the air stream isn’t as turbulent. True Airspeed vs Indicated Airspeed VS Equivalent Airspeed Since airspeed indicators use air pressure to measure speed, the indicated airspeed can be less than the actual airspeed at higher altitudes.
Air
MAY 21, 2025
It is a particularly insidious phenomenon that can be a prime cause of turbulence. Can cause sudden losses or gains in indicated airspeed (IAS), directly affecting lift. Vf = Vw x cos() The result will give the intensity in knots (KT) and the sign will give the direction: – A positive value indicates headwind (headwind).
AV Web
FEBRUARY 17, 2025
The pilot wrote that there was a rough air and a possible wake turbulence encounter. I would prefer to be 5 or 10 knots slower than the barber pole (maximum indicated airspeed in a turbine airplane) or red line.
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