Turn Radius

[Guest]

For those that may be interested in the formulas for Turn radius based on speed and bank angle. I answered an earlier post but it did not come to the head of the forum for some reason.Presume you are in an aircraft conducting a circling approach at 100 kias at an airport with a field elevation of 2,500 feet MSL, and maintaining a constant standard-rate turn, you will be flying a circle which is 1.05nm in diameter. Example on the numbers:KTAS=IAS*(1+(.02*ALTITUDE IN FEET/1000))KTAS=105D=KTAS/100D=1.05 NMBA=Bank angleBA=TAS*.15orBA=((TAS*.10) + (TAS*.10)/2)Presume you are flying at 140 kts21=140*.15or14=(TAS*.10)7=14/221=7+14This information comes from an article in AVWEB from Joseph E. (Jeb) BurnsideHope this helps. Have funRegards,Cliff ScottAAL415MiamiPrivate PilotCherokee 180

[Avcomware]

Hi, Cliff. Here is something that may be easier to remember.Your TAS is increasing about 2% per 1K feet, this may not be needed for small values.To approximate you Bank Angle take you Airspeed/10 and add 5 to it, 90Kias/10=9 +5=14Another one that I use for GS of 3 Deg Descent rate, Airspeed x 5. 100 Kias x5= 500 FPM, no wind. TV