Universal Weather
JULY 31, 2025
It assumes: No moisture (completely dry air) No wind or turbulence Standard pressure, temperature, and density profiles from sea level up through the stratosphere The model is based on the thermodynamic equation and includes tables of values for temperature, pressure, and density at various altitudes. Here’s what you need to know.
Pilot Institute
JULY 11, 2025
Key Takeaways Mach number is a dimensionless ratio of true airspeed to local speed of sound. Mach number is simply a ratio of your true airspeed to the local speed of sound. Air density drops with altitude, so for a given true speed, dynamic pressure (and thus IAS) will be lower at high altitudes. Here’s why.
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Plane and Pilot
JUNE 23, 2025
While it wasn’t a particularly hot day, Big Bear’s density altitude was reported as 8,200 feet, resulting in a higher true airspeed compared to indicated airspeed. Increasing true airspeed makes the turn radius wider, resulting in an overshoot. And it’s all so much harder in turbulence. Where is the wind?
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.
Professional Pilot
MAY 13, 2024
Operational peculiarities The NAT-OTS is unique in the world, as it changes twice daily to provide optimum routes for the main traffic flows, with due regard to the winds and turbulence. With jet cruise true airspeeds between 400 and 500 kts, this has a big effect on ground speed, and therefore on cruise performance and efficiency.
Professional Pilot
MAY 13, 2024
Operational peculiarities The NAT-OTS is unique in the world, as it changes twice daily to provide optimum routes for the main traffic flows, with due regard to the winds and turbulence. With jet cruise true airspeeds between 400 and 500 kts, this has a big effect on ground speed, and therefore on cruise performance and efficiency.
Pilot's Life Blog
JULY 25, 2024
You can obtain a standard briefing within six hours of your flight and you must provide the following information: Whether you’re flying visually or only with instruments Your aircraft identification and type Your intended cruising true airspeed and altitude The departure airport and time Your route and alternative airport options Your destination (..)
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