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Airport Engineering - Engineering

Q1:

If lift off distance of an craft is 2000 m, the clear way at the end of the runway should not be less than

A 145 m

B 152.5 m

C 162.5 m

D 172.5 m

ANS:D - 172.5 m

LOD = 2000 m.
Clearway length = 1/2(TOD " 115% of LOD),
D35( Distance to reach 35 feet or 10.5m height),
= 115% of LOD.
= 1.15 x 2000 = 2300m.

TOD( Takeoff distance).
= 115% of D35,
= 1.15 x 2300 = 2645m.
Clearway length = 0.5 x (2645 - 2300),
= 172.5m.