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Document No.: G304eS/AFMSupp, R00
Date of Issue: 09/16
5-2
H
P
H
Ltd.
5.3
Non-approved data
5.3.1 Speed polar
It was proved by measurements that influence of propeller blades to
glide performance is only about 1 L/D point in entire speed range.
5.3.2 Demonstrated crosswind performance
Not affected.
5.3.3 Rate of climb
Maximum rate of climb is available only for a few minutes with fully
charged Battery packs. As voltage is reduced, then also maximum rate
of climb is reduced.
Maximum altitude gain that can be reached at a standard atmosphere
conditions is greatly dependable on sailplane weight. To achieve
maximum altitude gain you should use about 15kW of power (not full
power, as total efficiency is better at lower power settings). Usually
suitable climbing speed it is about 100 km/h (54 KIAS, 62 mph) at
positive flap setting.
5.3.4 Range
The maximum range of powered cruising flight, without water ballast is
about 100km (62 miles), depending on lift-sink conditions.
The optimum cruising speed and flap position is about 110 km/h
(59 KIAS, 68 mph) at around 3000-3500 RPM and 4kW of power, at
positive (as used in thermals) position of flaps.
5.3.5 Maximal altitude that can be sustained.
Maximal altitude that can be sustained was determined by calculation.
Calculated max altitude
6000m ISA
Demonstrated max altitude
2800m ISA
CAUTION
Always take care that propeller blades are cleaned. Unclean
leading edge reduces propeller efficiency, and climb rate.
