Fuel Capacity
Usable
Unusable
To Tabs
-
US Gallons
US Gals
US Gals
US Gals
=
=
=
=
Litres
Litres
Litres
Litres
Fuel Usage
(Avg)
Edurance
-
US Gals/PH
=
Litres (use
-
Hours to Tabs (with reserve)
Hours with full tanks (with reserve)
L/Ph)
To Calculate Fuel, add:
Flight time
@
GPH
=
Litres PH
=
Litres
Alternate (30 Mins)
@
GPH
=
Litres Per 30 mins
=
Litres
=
Litres
=
Litres
=
Litres
=
Litres
=
Litres
Unusable
Taxy, Climb and Transit to start of Nav Leg (
Hold
@
GPH
=
US Gals)
Litres Per 30 mins
Subtotal
Contingency
10% of Total
Total Fuel Required
=
Litres
-----------------=
Litres
Endurance
=
Avgas – 100LL
Fuel Density: 7.2 lbs Per Imperial Gallon
0.72 Kg Per Litre
1.584 lbs Per Litre
6.02 lbs Per US Gallon
To Convert pounds of fuel (at MAUW) into Litres:Divide by 7.2 to give Imp Gals
eg: 78 lbs divided by 7.2 = 10.84 Imp Gals
Imp Gals x 4.546
eg: 10.84 multiplied by 4.546 = 49.3 Litres
Conversions (all conversions are taken from ICAO Annex 5)
Lb to Kg = Lb x 0.454
Kg to Lb = Kg x 2.205
Feet to Metres = Ft x 0.305
Imp Gal to Litres = Imp Gal x 4.546
Us Gals to Litres = Us Gals x 3.785
NM to Metres = NM x 1852.0
Pressure Altitude
ISA = 1013 HPa at Sea Level. Anything above 1013 HPA will indicate performance
will be better.
Eg: QNH is 1017 – A difference of 4 HPa above ISA @ 30’ per HPa = 4 x 30 = 120’
EGGP is 81’ Airfield Elevation, therefore 120’ – 81’ = 39’
Eg: QNH is 998 – A difference of 15 HPa below ISA @ 30’ per HPA = 15 x 30= 450’
EGGP is 81’ Airfield Elevation, therefore 450 + 81 = 531’
TODR – No Flap Incl 50’ on Climbout
Pressure
-
Temp
-
Wind
-
HPa
=
/
Ft
Kts
Runway Avail -
Metres
=
Ft
Runway Req’d-
Metres
=
Ft
Safety Factor
x 1.3
=
Ft
------------------------------------------------------------------------------------Runway 2 % upslope + 10%
x 1.1
=
Ft
LDR – Full Flap,
Pressure
-
Temp
-
Wind
-
Kts at Threshold
HPa
=
/
Ft
Kts
Runway Avail -
Metres
=
Ft
Runway Req’d-
Metres
=
Ft
Safety Factor
x 1.43
=
Ft
------------------------------------------------------------------------------------Runway 2% downslope + 10%
x 1.1
=
Ft
TAKE OFF
+20% (x 1.2) SHORT DRY GRASS
+25% (x 1.25) LONG DRY GRASS
+30% (x 1.3) LONG WET GRASS
+25% (1.25)
SNOW (Minimum)
+20% (x 1.2) LANDING
+30% (x 1.3)
+40% (x 1.4)
+25% (1.25)