CH6: Estimating Takeoff Wing Loading

Question 1

Turbine aircraft flying a maximum cruise efficiency should fly at conditions where (V/C)(L/D) is a _______.

Answer 1

Maximum

Fundamentals of Aircraft and Airship Design, Nicolai, Pg. 154

Question 2

For a turbine-powered aircraft flying at a max cruise condition, the L/D is _______ than L/D max.

Answer 2

less than
> 87% of L/D max for constant altitude cruise
> 94% for a cruise climb

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Question 3

True or False
The condition for maximum range when flying a prop-powered aircraft is such that (1/C)(L/D) = (L/D) max.

Answer 3

True.

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Question 4

For maximum loiter efficiency, a turbine aircraft should fly at conditions for maximum _________.

Answer 4

L/D

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Question 5

For maximum loiter efficiency, a prop-powered airplane should fly at conditions for maximum ________.

Answer 5

(L/D)/V

Fundamentals of Aircraft and Airship Design, Nicolai, Pg. 156

Question 6

An increase in wing loading will cause an ____________ in the stall speed velocity.

Answer 6

Increase

Extra Notes: See Eq. 6.1.
Vstall^2 = (W/S)(2/(rho*CL_max))

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Question 7

The takeoff distance _______ with an increase in wing loading.

Answer 7

increases

Extra Notes: See Eq. 6.2

Fundamentals of Aircraft and Airship Design, Nicolai, Pg. 157

Question 8

If the values of CL_max and T/W (thrust to weight) are large, the takeoff distance will be _______ (all things held equal).

Answer 8

Short

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