14.12.2008, 17:43
[quote="Congompasse"]One example: You're flying your 1964 Cessna 172 (which I own) at 91 knots into a head wind of 70 knots at a heading of 0 degrees and your density altitude is 29.92 then your TAS is 21 knots. See what I mean?I totally disagree with this statement, speed through the air is speed thru the air non dependent on tailwinds or headwinds. Me thinks you better take the CFI refresher course.
If your airspeed is only 21 knots how is the aircraft flying, I beleieve that your speed over the ground is 21 knots. Under your way of thinking if you are flying your 1964 Cessna 172 which you own at 91 knots into a 91 knot headwind then your TAS is 0, I ain't buying it.
Indicated airspeed (IAS) is the airspeed read directly from the airspeed indicator on an aircraft, driven by the pitot-static system. IAS is directly related to calibrated airspeed (CAS), but includes instrument errors and position error.
An aircraft's indicated airspeed in knots is typically abbreviated KIAS for "Knots-Indicated Air Speed" (vs. KCAS for calibrated airspeed and KTAS for true airspeed).
[edit] IAS and V speeds
Unless an aircraft is at a sufficient sea level under International Standard Atmosphere conditions (15
If your airspeed is only 21 knots how is the aircraft flying, I beleieve that your speed over the ground is 21 knots. Under your way of thinking if you are flying your 1964 Cessna 172 which you own at 91 knots into a 91 knot headwind then your TAS is 0, I ain't buying it.
Indicated airspeed (IAS) is the airspeed read directly from the airspeed indicator on an aircraft, driven by the pitot-static system. IAS is directly related to calibrated airspeed (CAS), but includes instrument errors and position error.
An aircraft's indicated airspeed in knots is typically abbreviated KIAS for "Knots-Indicated Air Speed" (vs. KCAS for calibrated airspeed and KTAS for true airspeed).
[edit] IAS and V speeds
Unless an aircraft is at a sufficient sea level under International Standard Atmosphere conditions (15