Good morning,
I've been posting a question on atpforum.co.uk but I still haven't got any reply,... and since my M&B exam is on monday I cannot afford to wait much longer,... Thus I post it again here. If anyone has got time to give me a hand it will be very much appreciated. Thank you !
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Question 1 :
I was just wondering if I was doing the things right. Could you confirm my reasoning is ok ?
Have a look to the following graph:
The actual CG position at take-off is at 30%MAC.
If 30 passengers get out of the plane from cabin OC, the new CG postion will be at 27.5%MAC.
To obtain that answer I just made a translation to the left. Look in the diagram.
Is that way of doing right ? I am asking because I don't always find the exact right answer doing that.
Question 2:
I have another question, I think I lack a good and strong structure in my way of resolving the following exercise. Could someone give me some guidelines to resolve it :
(For this question use
annexes 031- 11205A and 031-11205B: http://www.cours-de-math.eu/lrjt.jpg )
A turbojet aeroplane is parked with the following data:
Corrected dry operating mass: 110 100 kg
Basic corrected index: 118.6
Initial cargo distribution: cargo 1: 4 000 kg ; cargo 2: 2 000 kg ; cargo 3: 2 000 kg;
other cargo compartments are empty
Take-off mass: 200 000 kg; centre of gravity (C.G.) location: 32 %
For performance reasons, the captain decides to redistribute part of the cargo loading between cargo compartments, in order to take off with a new C.G. location of 34 %. He asks for a transfer of:
a). 1500 kg from Cargo 3 to Cargo 1
b). 1000 kg from Cargo 1 to Cargo 4
c). 1000 kg from Cargo 3 to Cargo 1
d). 500 kg from Cargo 1 to Cargo 3
Question 3:
In the following question they don't provide us with the DOI (Dry iperating Index). How can I find it ? I only Have the DOM (Dry Operating Mass).
(For this question use
annex 031-12272A: http://www.cours-de-math.eu/MRJT1.jpg )
For the purpose of calculating traffic loads, an operator's loading manual gives the following standard mass values for passengers. (These values include an allowance for hand baggage)
Male 88 kg
Female 70 kg
Child 35 kg
Infant 6 kg
The standard mass value to be used for hold baggage is 14 kg per piece
The loading manifest shows the following details:
Passengers loaded
Males 40
Females 65
Children 8
Infants 5
Baggage in hold number 4: 120 pieces
Using the standard mass values given and the data in the appendix, select from the following the correct value for the mass of freight (all loaded in hold No1) which constitutes the remainder of the traffic load
a) 280 kg
b) 210 kg
c) 260 kg
d) No cargo can be loaded in Hold 1
Thank you very very much for your help,
Emmanuel.