FLIGHT MANUAL
DYNALI HELICOPTER COMPANY
Edition N°3
DYNALI H2S January 2012
__________________________________________________________________________________
25
Turning and banking
Banking between 10° and 45° (desirable range in normal use)
It has been demonstrated that at a speed above 2/3 Vpm, or 40 kts, in a 45°
angle of bank coordinated turn the machine does not lose altitude during the first
60° of turn. As from 60° additional collective
should be applied to compensate for
sinking.
Banking between 45° and 90°
(extreme range, not advisable for beginners !)
It has been established that a turn at 90° bank is the equivalent of +3,5G load
factor.
2.15.
LIMITATIONS ON TAKEOFF
Dynamic rollover is always lateral.
When the collective is in the extreme lower position, the point of balance is at around 45°
inclination. When the collective is pulled up to the limit for takeoff, the balance point is at no
more than 10° inclination because the rotor is exercising a pull.
Take care always to take off gently, making sure that the skids leave the ground vertically.
There is a moment of risk during takeoff.
If the pilot fears a suction effect on the skids (frost, mud, entangling vegetation) he must take
care to takeoff with first the left skid. As soon as this detaches from the ground, the pilot
brings the cyclic back to the centre position to release the right skid.
Dynamic capsizing is treacherous as it starts gently. When placing in hover, the stick takes a
too large lateral corrective position. Initiation of the hover should be immediately interrupted
and lower the collective. The pilot should then seek out the reason or reasons that the skid
has been held on the ground and not attempt a further lift off until he is aware of all the
causes of the problems. Prior to initiating the takeoff again, he should check the following
points :
-
Is the balancing correct ?
-
Is the passenger in the right hand seat too heavy ?
-
Is the crosswind too strong ?
-
Is the slope beyond the operating limits of the machine ?
-
Is there an obstacle blocking the skid on the ground ?