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I've been working through the performance book, sitting the exam next week.
On page 102 you're asking for minimum fuel calculations. As per the new CAAP - variable fuel is trip fuel only (it does not include alternate). I take this to mean that we multiply our trip fuel by 1.1 (10% variable) then add the Alternate. Is my interpretation incorrect or has this just been overlooked? It changes some answers by several gallons. CASA have you manually type in many answers now and they won't tell us the tolerances, if we don't get these calculations correct I think it'll be the difference between pass/failing those questions.
Also, you have updated answers to include the new CAAP (question 9/10 on page 98) but it still states 45 mins Fixed reserve when it should be 30 mins
Stuart Tait replied the topic: Alternate Fuel issues
Your interpretation is incorrect, flight fuel = (departure to destination and on to the alternate) x 1.1 + holding + taxi*
*(depending on the question).
EDIT: Flight fuel is no longer used it is now trip fuel and the variable reserve only applies to trip fuel as such the calculation is now
[Trip fuel] x 1.1 + Alternate fuel + Holding Fuel + Taxi fuel (depending on the question)
Page 98 question 10 you are correct it should be 30 minutes as it's a private flight
Cheers for the quick response. Also while I remember, the link in the new performance e-text is for the old CAAP not 234 (2)
In the definitions of the new CAAP (copied below) it gives the definition for Trip Fuel (not Flight fuel anymore) and Variable. The note at the bottom of Variable states it does not apply to alternate fuel?
The amount of fuel required to enable the aircraft to fly until landing at the destination aerodrome, taking into account the operating conditions in paragraph 3.3. This includes (as applicable):
a. fuel for take-off and climb from departure aerodrome elevation to initial cruising level/altitude, taking into account the expected departure routing, and
b. fuel for cruise from top of climb to top of descent, including any step climb/descent, and
c. fuel from top of descent to the point where the approach is initiated,taking into account the expected arrival procedure, and
d. fuel for conducting an approach and landing at the destination aerodrome.
Variable fuel reserve The amount of fuel required to compensate for unforeseen factors. It shall be the highest of the percentage of the planned trip fuel specified in column 4 of Table 1 for the applicable category and class of aircraft or, in the event of inflight re-planning, the percentage specified in column 4 of Table 1 for the trip fuel from the point of in-flight re-planning, or the fuel required to fly for 5 minutes at holding speed at 1,500 ft above the destination aerodrome elevation in ISA conditions (as applicable).
Note: Variable fuel reserve does not apply to alternate fuel.