3 questions...
 

Hi guys, 3 questions that I don't succeed to understand, and in which I don't agree with the answer given. Can anyone help me?
thanks a lot

1)An aircraft is in straight and level flight and has a CL of 0.42 and a 1 degree increase in angle of attack would increase the CL by 0.1. The aircraft experiences a gust which increases the angle of attack by 3 degrees, what load factor would the aircraft be subject to?

2)If the maximum force acceptable is 50lbs and the design limit g of the aircraft is 6g, what is the stick force/g that must be achieved to permit the aircraft to be manoeuvred to its design limit?

3)At a true airspeed of 300kts what turn radius would be achieved in a 45 degree bank if g = 10m/s squared

in this one I've answered 9000m but it was said the right answer is 2387...why?

My guesses are:

1. 3 degrees would add 3 * 0.1 to CL giving a CL of 0.72 instead of 0.42. This is an increase of 0.72 / 0.42 = 1.7 ish.

2. 50 lbs total max force. 6g max LF therefore stickforce gradient is 50/6 = 8.3lbs/g

3. use r = V(squared) / (g x tan (angle of bank)
The important bit to remember is to have the same units i.e. convert knots to m/s i.e. 300 kts = 300 kts x 1852 m / 3600 secs = 154 m/s. This gives the right answer.

I think that's all correct, but it's been a while since I used my brain.

FIS