Eiri KY PIK-20 E - Page 56

PIK-20 E Flight manual
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7.2.6 Ceiling
With 0.5 m/s rate of climb (see Fig 7.3)
W = 470 kg h max = 5200 m (17000 ft)
W = 360 kg h max = 7200 m (23500 ft)
7.2.7 Operating range
At cruising speed 135 km/h and 1000 m (3300 ft) altitude the operating
range is 230 km (125 miles) without reserve.
The flight can also be done with dolphin techie, ie. climb with max
continous power at 100 km/h to max altitude, then retract the engine,
glide to starting altitude and make a new climb to max altitude. The ran
ge can be extended with this technic even to 450 km (250 miles).
7.2.8 Thrust and drag with extended engine
The thrust/drag graph gives
1. Sailplane drag polars
2. Drag polars with extended engine propeller windmilling
3. Drag polars with extended engine without propeller drag
(to use together with thrust curve)
4. Thrust curve with takeoff power.
T/D
200 V (km/h)
FIG 7.6: Drag and thrust curves
V EIRI KY ____ _____________________________ -V
Kisällinkatu 8
SF-15170 Lahti 17
page I -48
Revision 1.21.8.-79