Problem 4.4 - M dV dt ⋅ F t = dV F t M dt ⋅ = Integrating t M V ⋅ F t = t 325 10 3 × kg 225 × km hr 1 km ⋅ 1000 m ⋅ × 1 hr ⋅ 3600 s

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Problem 4.4 [Difficulty: 2] Given: Data on Boeing 777-200 jet Find: Minimum runway length for takeoff Solution: Basic equation Σ F x M dV dt = MV dV dx = F t = constant = Note that the "weight" is already in mass units! Separating variables MV dV F t dx = Integrating x MV 2 2F t = x 1 2 325 × 10 3 × kg 225 km hr 1km 1000 m × 1h r 3600 s × 2 × 1 2 425 × 10 3 × × 1 N Ns 2 kg m × = x 747 m =
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: M dV dt ⋅ F t = dV F t M dt ⋅ = Integrating t M V ⋅ F t = t 325 10 3 × kg 225 × km hr 1 km ⋅ 1000 m ⋅ × 1 hr ⋅ 3600 s ⋅ × 1 2 425 × 10 3 × × 1 N ⋅ N s 2 ⋅ kg m ⋅ × = t 23.9 s = Aerodynamic and rolling resistances would significantly increase both these results...
View Full Document

This note was uploaded on 10/19/2011 for the course EGN 3353C taught by Professor Lear during the Fall '07 term at University of Florida.

Ask a homework question - tutors are online