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Founder
22nd Nov 2006, 16:31
Does anyone know how to calculate the load factor when knowing only the airspeed and the radius of a turn?

For example
V = 200 kt
R = 2000 m

And how do you calculate the load factor from the angle of bank?

Anyone?

Rosanna
22nd Nov 2006, 16:56
Does anyone know how to calculate the load factor when knowing only the airspeed and the radius of a turn?

For example
V = 200 kt
R = 2000 m

And how do you calculate the load factor from the angle of bank?

Anyone?

Take a look here:
http://www.aerospaceweb.org/question/performance/q0146.shtml

Ciao!!!

Rosanna

ICEMAN757200
22nd Nov 2006, 17:33
Being : R= Radius, G= Gravity force, V= Speed, a= Bank Angle,n= Load Factor.

1:R=V*V/(G*Tan(a))
2:n=1/cos(a)

from 1 we find that:
R/(V*V)=1/Tan(a)

Tan(a)=V*V/R

a=Tan -1 (V*V/R)
thus

n= 1/(cos(Tan-1 (V*V/R)))

:ok: ps: Watch out ! use the correct units of measure.

ICEMAN757200
22nd Nov 2006, 17:39
Sorry i forgot the "G" :} so
a=Tan-1 (V*V/(R*G))
thus
n=1/(Cos(Tan-1 ((V*V/(R*G))) :8

Founder
1st Dec 2006, 10:28
Impressive, Thanx =)

Gary Lager
1st Dec 2006, 14:24
'g' from AoB is much easier.

since the vertical component must equal the weight, and AoB is also the angle to the vertical at which the Lift acts;

L cos AoB = W.

load factor by definition is L/W, so rearranging gives
L/W = 1/cos AoB

n = 1/cos AoB

ICEMAN757200
1st Dec 2006, 14:32
Thatīs right but he didnīt had the AOB, only the turn radius was given.

Gary Lager
1st Dec 2006, 14:45

And how do you calculate the load factor from the angle of bank?

:ok:

ICEMAN757200
2nd Dec 2006, 12:58
Oops!! my mistake :8 :ok:

AVGASJETA1
14th Jan 2015, 09:07
Hi ICEMAN

Could you pls use the 200kts and the 2000m in you formula?