T/W, W/S

Question 1

How is T/W defined?

Answer 1

(TOGA thrust at sea level) / (MTOW)

Question 2

What is a typical thrust percentage used at cruise?

Answer 2

20-25%

Question 3

What are some ways of getting an initial estimate of T/W?

Answer 3

Cruise T/W:
(T/W)_cruise = 1/(L/D)_cruise
Determine from climb req:
(T/W)_climb = 1/(L/D)_climb + V_vert/V

Question 4

What aircraft performance metrics does W/S affect?

Answer 4

Stall speed, climb rates, take-off and landing distances and turn performances.