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An aeroplane with reciprocating engines is planning to depart for an isolated destination aerodrome, as a Commercial Air Transport operation. Calculate the minimum amount of fuel required when overhead the isolated aerodrome, considering the following details.

Flight time: 2 hours and 45 minutes
Top of climb to top of descent time: 2 hours
Normal fuel consumption at cruise: 600 kg per hour

• A
700 kg
• B
630 kg
• C
600 kg
• D
1200 kg
Regulation (EU) No 965/2012
CAT.OP.MPA.106 Use of isolated aerodromes — aeroplanes
(b) An isolated aerodrome is one for which the alternate and final fuel reserve required to the nearest adequate destination alternate aerodrome is more than:
(1) for aeroplanes with reciprocating engines, fuel to fly for 45 minutes plus 15 % of the flying time planned to be spent at cruising level or two hours, whichever is less; or
(2) for aeroplanes with turbine engines, fuel to fly for two hours at normal cruise consumption above the destination aerodrome, including final reserve fuel.

• "for aeroplanes with reciprocating engines, fuel to fly for 45 minutes":
Normal fuel consumption at cruise: 600 kg per hour
45 min x 600 kg/h = 450 kg
• "plus 15 % of the flying time planned to be spent at cruising level":
15% x 2 h = 18 min
18 min x 600 kg/h = 180 kg

450 kg + 180 kg = 630 kg

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