Mahindra GIPPSAERO GA8-TC 320 - Climb; Cruise

Section 4
Model GA8-TC 320 Normal Procedures
CASA Approved
Page 4-12 5 Feb 2009 C01-01-08
4.4.6 Climb
Initial climb
Initial climb is performed with take-off aps, full throttle (Limited to 40 in Hg MAP below 5000 ft),
2500 RPM at 78 KIAS. The cowl ap should be set to maintain the CHT and oil temperature
within limits, depending on the ight conditions.
Enroute climb
Enroute climbs are usually performed with aps up, at up to maximum continuous power,
2500 RPM and at speeds 5 to 10 knots higher than the initial scheduled climb speed. This
provides better engine cooling with very little loss of climb performance. The cowl ap should
be set to maintain the CHT and oil temperature within limits, depending on the ight conditions.
NOTE:
Leaning during climb is permitted at up to 85% of rated power.
Leaning is permitted only within the limits described in the engine
limitations section, Section 2, paragraph 2.4.2. Engine temperature
instruments must be monitored and temperatures must be maintained
within the prescribed limits.
4.4.7 Cruise
The power setting and cruising altitude are the two major factors which will affect the cruising
speed and range of the GA8-TC 320. Other inuencing factors include the weight and loading,
temperature and equipment installed in a given aircraft. The maximum power setting normally
used for cruise is 75% of the engine’s rated power. Power settings below this will result in
increased range and endurance corresponding with the reduced fuel consumption. At a reduced
power setting of 45% the GA8-TC 320 is capable of attaining an endurance of close to seven
hours, using correct leaning procedures. The most appropriate power setting for altitude and
other considerations may be derived from the tables included in Section 5 of this manual. For
efcient and economical operation as well as to achieve maximum engine service life the engine
must always be operated in accordance with the procedures and specications set out in the
engine manufacturers operator’s manual.
The turbine inlet temperature (TIT) may be used as an aid for leaning the mixture in ight at
75% power or less. To set the mixture using the TIT gauge, lean the mixture slowly until the
temperature peaks on the TIT gauge, and then adjust the mixture based on the following:
Maximum Power Cruise
The engine must always be operated on the rich side of peak TIT. Before leaning, to obtain
maximum power mixture it is necessary to establish a reference point accomplished as follows:
a. Establish a peak TIT for best economy operation at the highest
economy cruise power without exceeding 1650°F (899 °C).
b. Deduct 125°F (52 °C) from this temperature and thus establish the
temperature reference point for use when operating at maximum
power mixture.
10 Nov 2010 01 Aug 2011