Math Tips

Question 1

What are the steps to calculate Minimum Fuel?

Answer 1

1. Write RESV fuel 2. Write ALT fuel 3. Find straight line distance from your HOLD to DEST 4. Approximate 1000lbs/100NM 5. Add 500lbs extra for delayed radar vectors and approach

Question 2

Calculate minimum fuel given: IAD-MIA ALT:MCO 7.95ENROUTE, 2.327 RESV, MIN FUEL 10.277, EXTRA .723, TAXI 226, PLN FUEL 11.226, COST 26 (assume it is 60NM from HOLD to DEST)

Answer 2

2.327 RESV, 2.5 ALT, .6 BURN, so 60/100=.6 x 1000 = 600lbs of fuel so .5 Extra equals 5927 Minimum You’ll need to leave the hold for either your DEST or an ALT when you reach 5927lbs of fuel

Question 3

What are the steps to calculate descent planning?

Answer 3

Alt to lose x 3 = distance needed to descend; GS/2 = rate of descent

Question 4

Calculate the descent info for FL340-FL200 at 520kt GS

Answer 4

FL340 - FL200 = 14,000 x 3 = 42NM to descend; 520GS/2 = 260 or 2600fpm descent rate