Pilot Operating Handbook
H3 EasyFlyer Sport
SECTION 7
SYSTEMS
Dynali_POH_H3 EasyFlyer Sport Rev. 2.5
– Issue date 30.10.2020 Page
53
➢
The
Rotax 914UL 115HP with TURBO
, which provides for the maintenance of the
full power range at any altitude. Although there is some added weight resulting from
the addition of a turbo and associated equipment, this version promises to be
popular for heavy pilots in hot and high environments. However, in the case of a
failure of the turbo system, the power drops down to 80HP and the helicopter is not
able to provide enough power reserve.
Carburettors
Injection
Turbo
Engine
Rotax
912ULS
Rotax
912ULS-I
Rotax
914UL
Bore
1350 cm
3
1350 cm
3
1200cm
3
Max. power output
100 HP
110 HP
115 HP
Cooling system
Water, oil, air
NOTE
The Rotax 900 series are among the best engines in the world. However, Rotax
does not guarantee its engines when these are used in rotary wing aircraft.
WARNING !
Rotax engines are not certified for being installed in light helicopters because of
their inherent transmission system using pulleys and belts.
Instead of axial loads generated by an aircraft propeller, the drive pulley of a
helicopter generates radial loads on the engine reduction gear.
Radial loads on the engine reduction gear can cause premature wear of the
engine gear bearing. There is no standard service lifetime and the possibility of
a failure must be considered during all the helicopter service life.
In case of a sudden failure of the reduction gear bearing, an autorotation must
be performed.
CAUTION
Some brands of fuel generate engine knock and then destruction of the pistons
in a very short time.
7.3
MAIN TRANSMISSION
The drive pulley is bolted directly onto the engine shaft.
