FLIGHT MANUAL
DYNALI HELICOPTER COMPANY
Edition N°3
DYNALI H2S January 2012
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7
less than 100ft/min on a short final taking care to monitor the power progressively prior to
hover (it is worth noting that at the correct power calculated for hover already set at 10ft from
the ground, the helicopter will settle by inertia at the correct height for the hover, i.e. 3ft).
Theoretical example :
You arrive at
a high altitude field and it is hot. You have consumed part
of the fuel and, pre-flight you have studied the altitude/mass/temperature charts.
Theoretically you are within the safe limits but stay wary all the same and watch your rotor
RPM during short final. If the low RPM warning lights up, break away downwards while
slightly lowering the collective to recover the lost rotor revs.
Never forget that:
An accumulation of factors may lead to an increased need for power.
Power limits make flying the helicopter more delicate. Takeoff and landing must be
performed gently while always using techniques which use the least possible power.
To be learned by heart:
In case of engine failure, lower the collective to the limit, use the left pedal to avoid a
yaw to the right, attain safe speed as quickly as possible and a trajectory which will
bring you to a safe landing spot. During descent, take care to manage your rotor
RPM. Flare out to stationary position followed by applying pitch control input one or
several times to soften your contact with the ground. (Never forget that a good flare
perfectly controlled and a non-sliding landing will themselves take care of your
safety). Even if the final is late or early, if you avoid a sliding landing you have every
chance of emerging intact after your engine failure).
If the rotor RPM greatly exceeds the normal operating range, do not panic. This does
not mean that you should ignore the RPM during auto-rotation. On the contrary, these
must be checked by the pilot but if, in a short final at the end of the flare-out, you
exceed the upper limit of the rotor RPM, no panic, continue your auto-rotation. Once
the landing has been completed, and depending on the extent of the excess RPM,
you should ask for technical assistance or expert advice.
Note : in the context of the hours of flight instruction with the instructor, mast bumping will be
studied theoretically on the ground only.