FES Maintenance manual Version 1.12
September 2016
Page 7 of 26
3.2.2
Propeller
The foldable fixed pitch carbon fibre composite propeller is high quality product.
Technical data and limitations of the propeller:
Number of propeller blades:
2
Maximum power on a propeller shaft:
23 kW;
Maximum rotational speed:
4500 RPM +5%;
Propeller blade mass excluding attaching bolts:
approximately 245 g each blade;
Diameter of the propeller:
d = 1000 mm;
Service time between main overhauls:
50 hours;
Total service time:
200 hours;
Type of propeller:
tractor;
Sense of rotation:
clockwise looking at direction of
flight.
Operating conditions:
the propeller can be operated in any
normal
environment
conditions
except hail, sand storm or similar
FES propellers as described herein is designed and tested according to CS 22
Subpart J. It is made of GFC and CFC from accurate metal molds, which were
manufactured using modern CNC technology. This made it possible to have very accurate
propeller geometry. Inside is solid and not hollow.
Quality acrylic white paint is used to protect the composite body against moisture
and erosion. Each blade pair is sanded and polished so that mass difference tolerance is
only 0,2g. Paint is resistant against fuel, oil and other chemical products. This type of paint
has also an excellent flexibility.
More detailed propeller description is provided at FES Propeller manual.
