Turn Performance Calculator

[BBP]

http://www.csgnetwork.com/aircraftturninfocalc.html (there is an actual calculator here)


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Aircraft Turn Information Calculator
This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to give calculated but still approximate information about the turn that an aircraft makes under given circumstances. This calculator DOES NOT take into consideration wind speed or direction, temperature, air density or aircraft performance and assumes LEVEL flight and turns. It is for general information only. Enter the speed of the aircraft in MPH, miles per hour, or Knots (KTS), nautical miles per hour, (the other will be calculated) as it enters the turn. Enter the rated clean level flight stall speed of the aircraft in the same way; finally, also enter the angle of the level turn in degrees. Click on Calculate to determine the radius of the turn and the diameter of the turn in feet, in miles and in nautical miles, as well as the turning times for a 360, 180 or 90 degree turn. It also returns the G loads and the increase in stall speed values and percentage. This does NOT attempt to calculate an accelerated stall. All calculated values should be considered as approximate. Consult your aircraft manual for specific values for YOUR aircraft.

   
Turn Performance Calculator
Required Data Entry
Aircraft Speed Entering Turn    MPH KTS
Aircraft Rated Stall Speed    MPH KTS
Turn Bank Angle    °
   

Calculated Results
Turn Radius    Feet
Turn Diameter    Feet
Turn Diameter    NMiles
Turn Diameter    Miles
G Load    Gs
Increase In Stall Speed    Factor
Increased Stall Speed    KTS
Increased Stall Speed    MPH
360° Turn Time    Seconds
360° Turn Time    Minutes
180° Turn Time    Seconds
180° Turn Time    Minutes
90° Turn Time    Seconds
90° Turn Time    Minutes
Updated 8.15.11
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[Zimme83]

Unfortunately not very helpful, does not seems to work. 100 mph entry speed, 89 degree bank and 55mph stall speed gives a turn radius of 12, 2 feet and a g-load of 54,8...

[FLS]

Good luck holding a level turn at a 90 degree bank at 100 MPH. Try it with a normal turn. 60 degree bank at 200 mph. 

What keeps this calculator from being more useful is generally not knowing your exact  bank angle.

I like to use speed and g load to calculate turn info since you can read both in the cockpit.

[Zimme83]

I know, it was just a test. But it seems like it uses very basic trigonometry for the calculation, it is just how big increase in lift vector needed for the wings to produce the same vertical lift as in straight and level flight. (Lift/Cosinus[bank angle]). Not so useful for high performance planes or high bank angles.