P&M Aviation QUIK GT450 Operating Instructions Manual page 34

Density altitude will affect take-off performance: for example at 4000 ft altitude the takeoff run will be 1.9
times as long, and if the temperature is 32°C at 4000 ft, the run will further increase to 2.1 times as long.
WARNING
!
Before take-off or landing at altitude, in hot
conditions, on a short strip and particularly in
the case of a combinaton of all three, do your
density altitude calculations.
Before Take off Checklist
• • • • Performance Calculations: (see above)
• • • • Wing visual check: nose, front rigging, side rigging, tip rods, ribs, rear rigging, hang-point bolt, control
frame and bolts, basebar bolts.
• • • • Trike: front strut pins/rings, brake operation, steering free, baggage box lids secure, harnesses, side skirts
secure, ignition switch check operation and magneto drop, intake and exhaust system secure, hand and foot
throttle operation, mixture rich.
• • • • Magneto drop: check brakes on, at engine idle turn OFF both magneto switches, check for dead cut, and
turn on again. Idle speed should be set at around 1400 RPM for the Rotax 912/912S engine. Run engine to
4000 RPM, then turn OFF front magneto. Listen for any misfire and observe mag drop (see also Engine
Operators Manual). There must be a noticeable drop, which is accompanied by a slight change in engine
note. Check the other magneto in the same way.
Then use the mnemonic CHIFTWAMPB as follows:
C
ONTROLS: full and free movement of control bar & nose wheel; set trimmer to takeoff.
H
ELMET & HARNESS: check both your own and particularly your passengers seat belt & harness.
I
NSTRUMENTS: all functioning, CHTs correct, Altimeter set, Oil temp and Oil pressure, altimeter
set, Intercom and Radio switched on and working.
F
UEL: fuel cap on, fuel tap on and fuel sufficient for planned journey + reserve.
T
RIM
: set to takeoff position.
W
IND DIRECTION & STRENGTH: within both aircraft and pilot limits?
A
LL CLEAR: to taxi, to line up for finals, check for other aircraft in the circuit?
Mixture, Magnetos
P
OWER: Check full power rpm at the start of the takeoff roll. Abort the takeoff if full RPM is not
reached or rough running occurs.
NOTE: FULL POWER STATIC RPM - Rotax 912UL-S = 4800, min 4700
BRAKES: Off
BRAKES MUST BE OFF BEFORE STARTING TAKEOFF.
The aircraft will slide under full power on wet grass with locked brakes.
Locked brakes will cause loss of directional control during takeoff with high
risk of a serious accident.
Take-off Technique
The hand throttle should not be used during take-off. Set the pitch trim control to the placarded take-off
position. Check brakes are OFF. The correct technique on smooth surfaces is to allow the wing to trim in
pitch during the initial stages of the take off run so as to reduce the drag and increase the acceleration. In
smooth air conditions, push forward until the aircraft unsticks at around 40mph (64km/h, 35kn) and then
allow the aircraft to accelerate to around 60mph (96km/h, 50kt) for the climb. When established in the climb,
adjust the trimmer to remove the bar pressure.
In smooth air conditions on rougher ground, push the bar out to its fullest extent for the whole takeoff run, to
get the weight off the wheels as soon as possible. The trike unit will then swing forward under the wing. Allow
the control bar to float back as this happens and climb away in the manner indicated above. It follows that
Quik & Quik GT450 Aircraft Operating Instructions
th
29 March 2007
Issue 1
If the wing is wet, take off distance can be up to
30% longer.
: Fully rich, on both
Rotax 912UL
WARNING
!
WARNING
!
= 5100, min 4900
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