Pilot Operating Handbook
H3 EasyFlyer Sport
SECTION 9
SAFETY TIPS
Dynali_POH_H3 EasyFlyer Sport Rev. 2.5
– Issue date 30.10.2020 Page
65
Entering the vortex
In the event of descending too fast or moving forward with a tail wind, there is a danger
of entering your own vortex and catching up with your own turbulence. The rotor
operates in turbulent air and loses a large part of its lift. This phenomenon is present
at all altitudes.
Power management
Helicopters have relatively low reserve power in certain conditions such as transition
phases, high altitude flight or air conditions (high temperature, turbulence,…).
Maximum loading of the rotor can be suddenly attained and a marked difference
between the aircraft’s characteristics in solo flight and heavy dual flight can be
observed. With a heavy payload, limitations are more restricted and the power margin
is reduced.
A piston engine has little inertia. With the slightest drop in engine speed the rotor will
“freewheel”. In icing conditions, for example, the engine may simply stop as compared
with a fixed wing aircraft which will still be provided with thrust for a moment by its
propeller. The governor system may hide the early stages of icing.
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Keep up your speed and never remain “hanging on your engine”, it may fail.
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Never fly in a helicopter which is not adjusted for autorotation.
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To keep in training, descend as often as possible in autorotation, stopping short
of the ground.
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Always watch your manifold pressure. This instrument will tell you the reserve
power available. B
efore initiating any manœuver, check that you have at least
1" inHg MAP in reserve.
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Do not continue with a landing if the LOW RPM warning is alight.
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Check that the engine runs smoothly at idle.
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The throttle sandow must be kept in good condition.
WARNING !
Manoeuvres close to ground and takeoffs and landings should be performed
with the governor set at 5800 RPM to provide more power.
If you have, in climb or on take-off, exceeded the available power, the rotor will
lose RPM. The worst reaction is to further raise the collective, which will even
further reduce the RPM. The correct reaction is to lower the collective and open
the throttle to the limit. Then, allow the helicopter to lose a little more height
while awaiting for the RPM to increase.
