Performance and flight mechanics

Question 1

What is the relationship between T/W and L/D is steady level flight?

Answer 1

T/W in level flight is the inverse of L/D

Question 2

For what L/D is the minimum thrust req for level flight

Answer 2

maximum L/D

Question 3

How can the velocity for flight on minimum power be found?

Answer 3

Setting the derivative of P to zero.

Question 4

How to optimise jet aircraft for range

Answer 4

Set the derivative of the range parameter with respect to velocity equal to zero yields an expression for the velocity for the best range for a jet.

Question 5

Range optimisation for propeller aircraft

Answer 5

sub C=CpowerV/np into Breguet range equation