Piper PA-28-161 Pilot Operating Handbook page 86

PIPER AIRCRAFT CORPORATION
PA-18-161, WARRIOR II
(3) Cruise Power Best Economy Mixture
(4) Cruise Speed
(5) Cruise Fuel Consumption
(6) Cruise Time
(e)(2) divided by (e)(4), (283.5
miles divided by 118 K TS)
(7) Cruise Fuel
(e)(5) multiplied by (e)(6), (8.5
GPH mulitiplied by 2.40 hrs.)
(f) Total Flight Time
SECTION 5
PERFORMANCE
75% rated power
(2625 RPM)
118 KTS TAS*
8.5 GPH
2,39 hrs.
20.3 gal.
The total flight time is determined by adding the time to climb,
the time to descend and the cruise time. Remember! The time values
taken from the climb and descent graphs are in minutes and must be
converted to hours before adding them to the cruise time.
The following flight time is required for our flight planning
example.
( l) To till Flight Time
(c)(3) plus (d)(l) plus (e)(6),
(.15 hrs. plus .05 hrs. plus 2.39 hrs.) 2.59 hrs.
(g) Total Fuel Required
Determine the total fuel required by adding the fuel to climb,
the fuel to descend and the cruise fuel. When the total fuel (in
gallons) is determined, multiply this value by 6lb/ gal. to determine
the total fuel weight used for the flight.
The total fuel calculations for the example flight plan are
shown below.
(I) Total Fuel Required
(c)(S) plus (d)(3) plus (e)(7),
(2.0 gal. plus .5 gal. plus 20.3 gal.) 22.8 gal.
(22.8 gal. multiplied by 6 lb/ gal.) 136.8 lbs.
*reference Figure 5-23
ISSUED: AUGUST 13, 1981
REPORT: VB-1180
5-7