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a normal "after takeoff" power setting is 24.5 inches Hg. and
2500 RPM.
CLIMB
To save time and fuel for the over-all trip, it is
recommended that the normal cruising climb be conducted at
115-130 KIAS using approximately 75% power (24.5 inches Hg.
manifold pressure and 2500 RPM).
Cruising climbs should be conducted at the recommended
fuel flow; refer to the Pilot's Checklist.
If it is necessary to climb rapidly to clear mountains
or reach favorable winds at high altitudes, the best rate-of-
climb speed should be used with maximum power.
This speed
varies from 107 KIAS at sea level to 99 KIAS at 10,000 feet.
During maximum performance climbs, the mixture should be
leaned to the recommended fuel flow.
It is recommended that
the auxiliary fuel pumps be on at altitudes above 12,000 feet
for the duration of the climb and approximately 5 to 15
minutes after establishing cruising flight.
It is also
recommended that the mixture remain at the climb mixture
setting for approximately 5 minutes after establishing cruis-
ing flight before leaning is initiated.
These procedures
will eliminate fuel vaporization problems likely to occur
from rapid altitude changes.
If an obstruction ahead requires a steep climb angle,
the aircraft should be flown at the best angle-of-climb speed
with flaps up and maximum power.
The speed varies from 85
KIAS at sea level to 89 KIAS at 15,000 feet.
Performance
data for maximum climb, cruise climb and single-engine climb
are presented in Section VI.
CRUISE
Tabulated cruising information is provided for normal
power and altitudes in Section VI.
These charts are based on
600, 978 and 1218 pounds of fuel for cruise, recommended lean
mixture, 5500 pounds gross weight, zero wind, and no fuel
reserve.
Allowances for warm-up, headwinds, variations in
mixture leaning technique, and fuel reserve should be es-
2-8
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