perf problems part 2

[Jinkster]

Hello all,

Having some more performance questions. Also from feedback so anyone sitting this subject soon will find the help and questions useful,

thanks,

• For this question refer to perf manual SEP fig 2.2, With regard to the take off performance chart for the single engine aeroplane determine the take off dist to height of 50ft.

OAT = 38C
Pressure alt = 4000ft
Aeroplane mass = 3400lbs
T/W component = 5kts
Flaps = approach setting
Runway: dry grass correction factor = 1.2

a) approx 4200ft
b) approx 5040ft
c) approx 3960ft
d) approx 3680ft


• Following a takeoff limited by the 50ft screen height a light twin climbs on a gradient of 5%. It will clear a 160m obstacle in relation to the runway (horizontally), situated at 5000m from the 50ft point with an obstacle clearance margin of:

a) it will not clear the obstacle
b) 105m 
c) 90m
d) 75m


• With a TAS of 194kts and a vertical speed of 1000ft/min the climb gradient is about

a) 3degrees 
b) 3%
c) 5 degrees
d) 8%


• On a dry runway the accelerated stop distance is increased:

a) by uphill slope 
b) by headwind
c) by low outside air temperature
d) by a lower take off mass because the aeroplanes faster to V1


• During certification flight testing on a four engined turbojet a/c the actual TOD measured are:
3050m with failure of critical engine
2555m with all engines operating and all other things being equal

The take off distance adopted for certification file is:

a) 2938m
b) 3050m 
c) 3513m
d) 2555m

Why isn’t it ‘A’ as in 2555m x 1.15?