Pilot Operating Handbook
H3 EasyFlyer Sport
SECTION 7
SYSTEMS
Dynali_POH_H3 EasyFlyer Sport Rev. 2.5
– Issue date 30.10.2020 Page
51
SECTION 7 -
SYSTEMS
The purpose of this chapter is to introduce the pilot who has not assembled his Dynali
H3 EasyFlyer
‘Sport’ to the various systems forming part of this helicopter.
Further information can be found in the assembly manual. We advise all pilots to read
through this in order to better understand the design and mechanics of the Dynali H3
EasyFlyer
‘Sport’.
7.1
CHASSIS & UNDERCARRIAGE
The basic protective structure of the chassis is made from
welded tubular stainless
steel
tubes to provide maximum
passive safety for the crew
. The tubes are all
connected to each other by TIG welding.
The main tubes are all of a diameter 25mm
with a thickness of 2mm
, providing thus
excellent resistance to fatigue
, inspite of
a higher mass (total weight of the chassis is around 25kg). In addition (and mostly for
check),
a pressure indicator is located at the aft of the chassis
. As long as the
green indicator can be seen, there is pressure in the chassis. If it disappears, it means
that there is a loss of pressure in the chassis.
Nominal pressure = 3 bar Pressure lost
The possible leak can come either from the valve, or, in the worst case, from a crack
in the chassis. In any case of doubt, inflate pressure in the chassis and search for the
origin of the leak.
The undercarriage is made of aluminum and stainless steel tubing
. It is of shock
absorbing design with two legs designed for progressive deformation on each side
(passive safety). The two black balls (or metal inserts as from 2016) located in the front
are necessary to avoid vibration of the skids. They can be removed but vibration of the
skids may be observed in certain flight conditions. The two central tubes of the skids
(that bond left and right side) can bend in a curve, giving some flexibility to the
undercarriage. Deformation of these central tubes may not exceed 17mm at the
midpoint.
