On the nav. computer put 22 on the inner main scale
next to the U.S.gal. index,
go to the imp.gal. index and note fuel consumption is
18.2 IG per hour.
Put the 60 (minutes) on the inner main scale next to
18.2 (IG/hr) on the outer main scale.
Go to 83 (IG – total fuel available) on the outer main
scale and read next to it the fuel endurance: 272 minutes = 4 hours 32
minutes.