Fuel Required - Cirrus DESIGN SR20 Information Manual

Section 5
Performance Data

Fuel Required

The total fuel requirement for the flight may be estimated using the
performance information obtained from Figures 5-15 and 5-16. The
resultant cruise distance is:
• Total distance (from sample problem) ........................ 560.0 NM
• Climb distance (corrected value from climb table)........ 17.0 NM
• Cruise distance (total distance – climb distance) ....... 543.0 NM
Using the predicted true airspeed from the cruise performance table,
Figure 5-16, and applying the expected 10-knot headwind, the ground
speed for cruise is expected to be 121 knots. Therefore, the time
required for the cruise portion of the trip is:
• 543.0 NM/121 knots = 4.5 hours.
The fuel required for cruise is:
• 4.5 hours x 9.2 GPH = 41.4 gallons.
From the 6000 ft Cruise Table (Figure 5-16), a 45 minute IFR reserve
at approximately 70% power requires:
• 45/60 x 11.1 GPH = 8.3 gallons
The total estimated fuel required is as follows:
• Engine start, taxi, and takeoff ................................... 1.0 gallons
• Climb ........................................................................ 2.4 gallons
• Cruise ..................................................................... 41.4 gallons
• Reserve .................................................................... 8.3 gallons
• Total fuel required ................................................... 53.1 gallons
Once the flight is underway, ground speed checks will provide a more
accurate basis for estimating the time enroute and the corresponding
fuel required to complete the trip with ample reserve.
5-8
Cirrus Design
P/N 13999-002 Info Manual
September 2011
SR20