Pilot Prep

Ever wondered what keeps an airplane in the sky? It's all about the balance of four fundamental forces!
​1️⃣ Thrust: The forward-pushing force generated by the engines that moves the aircraft through the air.
2️⃣ Drag: The resistive force caused by air friction that opposes thrust.
3️⃣ Lift: The upward-acting force created by air moving over the wings, which counters weight.
4️⃣ Weight: The downward-pulling force of gravity on the aircraft.
​For a plane to fly, thrust must overcome drag, and lift must be greater than or equal to weight. Mastering these concepts is key to understanding flight!

Gen Nav Question Series With Solutions
question 5

An aircraft at position 60°N 005°W tracks 090°( T ) for 315 km. On completion of the flight the longitude will be ;
a) 005°15'E
b) 000°15'E
c) 000°40'E
d) 002°10'W

Since the plane is flying westwards on 090 degrees True track, the latitude of the last point will also be 60°N.
In order to calculate the longitude difference, it is necessary to convert the total km traveled into NM.
315 : 1.852 = 170.08 ≈ 170 NM
Using the Departure formula, the total longitude difference is found; ( cos 60 = 0.5 )
Departure = D Long x cos Lat
170 = D Long x cos 60 → D Long = 170 : cos 60 → D Long = 170 : 0.5 = 340 minutes of longitude change.
The equivalent of this in minutes and degrees is = ( 5 x 60 ) + 40 = 5°40'. The first moving longitude is greater than this value.
is removed; 005°40' – 005°00' = 000°40', since the new longitude lies east of the 0 meridian, it is found as 000°40'E.

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