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4. Maintenance
4.1. Prop mechanism and motor bell
The prop mechanism may not be modified from his original configuration. Do not attach or detach any
nuts or any other parts!
When delivered, the prop mechanism and the motor bell is always balanced. It is important
that the prop mechanism is mounted in the same position on the motor shaft again. The position of the
prop mechanism is therefore to be marked with a felt pen on the motor shaft and the prop mechanism
before removing
.
Before the first flight of the day you must verfiy if the prop mechanism is secured tightly on the
motor shaft. Hold the prop mechanism and try to turn the motor back and forth. If the prop mechanism
is loose tighten the hexagon screws (see graphic 4.1.-1-33). Be aware that the hexagon screws are
secured by a secand hexagon screw, which must be removed first.
Graphic 4.1.-1. Prop mechanism
If you need to replace the propellers, then remove the steel M3 nut and pull out the 3 mm bolt (see
graphic 4.1.-1-41.). Use only the following propellers:
20’’ x 13‘’ Reinforced Freudenthaler Carbon Props to be ordered on
After mounting the propellers fasten the steel M3 nuts tightly and secure them with superglue. The
propellers must still be able to turn easily.
Adjusting and balancing of the prop mechanism
After each change of propellers the prop mechanism has to be well balanced. Use a calliper to hang
out the spring clips on the wire bow (see graphic 4.1.-2 -42 ).
Graphic 4.1.-2. Adjusting the distances