March 2014 exam question mass and balance
The mass and balance information gives : Basic mass : 1 200 kg ; Basic balance arm : 3.00 m Under these conditions the Basic centre of gravity is at 20% of the mean aerodynamic chord (MAC). The length of MAC is 2m. In the mass and balance section of the flight manual the following information is given : Position Arm front seats : 2.5 m rear seats : 3.5 m rear hold : 4.5 m fuel tanks : 3.0 m The pilot and one passenger embark; each weighs 80 kg. 95kg fuel. The rear seats are not occupied. The position of the centre of gravity at take-off (as% MAC) is :
1200 x 3m aft of the datum. 180 x 2.5. 95 x 3. 4355 / 1475= 2.95 m The BEM had a CG at 20% MAC on a 2m chord so LEMAC 2.4m from the datum. 2.95 - 2.4= 0.55m 55 / 2 x 100% = 27.5% but the answer closest to this was 29 and 21/22. Can't remember. I went for 29% is that right?
Mass of 450 is loaded at a station 8.0 behind centre of gravity and 6.8 behind the datum. (Assume g=10 m/sec squared). the moment for that mass used for loading manifest is?
3060kgm
30600kgm
What would be the correct answer for this? As practise exams use nm as units rather than kgm.
Thank you in advance.
Last edited by clkorm3; 3rd March 2014 at 23:40.