Rally Pilot Operating Handbook
Copyright 2008, Rally Aircraft
Revision 4.1
26
With an expected 10 knots headwind, the ground speed for cruise is predicted to be:
100 knots – 10 knots = 90 knots
Therefore, the time required for the cruise portion of the trip is:
385 nm ÷ 90 knots = 4.3 hours
The fuel required for cruise is: 4.3 hours x 3.8 gal. = 16.3 gal.
The total estimate fuel required is as follows:
•
g) Engine start, taxi, and takeoff ............... 0.8 gal.
•
h) Climb ......................................... 1.4 gal.
•
i) Cruise ........................................ 16.3 gal.
•
j) Total fuel required (g + h + i) ............... 18.5 gal.
This will leave a reserve of: 20 gal. – 18.5 gal. = 1.5 gal.
Once a 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.
5.25 LANDING
A procedure similar to takeoff should be used for estimating the landing distance at
the destination airport. Figure 5-6 presents landing distances for various airport
altitude and temperature combinations using the short-field landing technique. The
distances corresponding to 2,000 ft and 86°F are as follows:
•
Ground roll ................................... 430 ft
•
Total distance to clear a 50-ft obstacle ...... 1,000 ft
A correction for the effect of wind may be made based on Note 2 of the landing
chart using the same procedure as outlined for takeoff.
5.3 STALL SPEED CHART
Bank Angle
0
o
30
o
45
o
60
o
Flap
Position
Speed
(Kts/mph)
Speed
(Kts/mph)
Speed
(Kts/mph)
Speed
(Kts/mph)
UP
40/46
45/52
57/66
75/86
10
o
39/45
44/51
53/61
67/77
20
o
37/43
42/48
51/59
65/75
32
o
35/40
37/43
45/52
60/69
GW: 1,320 lbs.
Condition: power off
Figure 5-1, Stall Speed Chart
