Pilot Operating Handbook
H3 EasyFlyer Sport
SECTION 7
SYSTEMS
Dynali_POH_H3 EasyFlyer Sport Rev. 2.5
– Issue date 30.10.2020 Page
56
The seven bolts and the two blade screws are set in position on a template.
Dismounting them may cause misalignment. When removing the blades, it is done by
unscrewing the 2 x 4 M8 bolts, holding the blade supports.
7.6
TAIL ROTOR
The tail rotor is equipped with four blades in order to keep a small diameter
which provides for a greater degree of safety. The blades have a N° relative to
their manufacturing balancing. It is not possible to replace one single blade.
Blades must all be replaced together.
The four blades (120g each) are composed of carbon
, held by blade roots which
are not articulated. The blade roots are held in nylon bearings which rapidly develop
play.
This play does not affect the performance as the nylon bearings are held by stop
bearings with flat rollers.
In operation, the centrifugal force maintains the roots
firmly in place which press uniformly on the whole crown of the bearings.
Only the rollers of these bearings must be greased and all surplus grease is
immediately evacuated by the 1kg of centrifugal force. The rollers dry and sometime
corrode rapidly but no intervention is required as long as the rudder pedals do not show
stiffness. All that has to be done then is to dismantle, clean with gasoline and grease
the corroded rollers without necessarily changing them.
The rear transmission gearbox (RTG) also has a pair of conic gears with spiral teeth
and splash lubrication. The entry and exit shafts are of stainless steel. It does not
present any problem of wear. A chip detector is also installed.
The left lateral bearing of the RTG, even if fitted with a sealing ring, may leak a little !
Regularly sponge the oil drop in the lip of this lateral bearing.
7.7
FLIGHT CONTROLS
Standard equipment includes dual controls. The cyclic on the passenger side can be
folded away. The regulation only allows dual control during training flights with
instructor.
All controls operate through control rods with ball joint endings
. The flight
controls of the Dynali H3 EasyFlyer
‘Sport’ operate in the same manner as those of
most other helicopters.
The cyclic and the collective control the pitch of each
blade via the swash plate.
