ALPHA Electro
www.pipistrel-aircraft.com
REV. 0
POH-167-00-40-150
Performance
Introduction
This section provides information about the aircraft’s airspeed calibration, stall speeds and general
performance. All data published was obtained from test flight analysis using average flying skills.
The ALPHA Electro has demonstrated adequate motor cooling performance at ambient temperatures
of up to 40 °C (104 °F). This is not to be regarded as a temperature limit, however higher temperatures
may have an adverse effect on motor cooling and overall performance.
Energy management and mission planning
When flying the ALPHA Electro, it’s important to pay special attention to energy and endurance man-
agement. The following is a set of SOC depletion guidelines for the different flight stages:
- 1% of SOC for every 100 ft of climb
- 15% of SOC for flight from take-off to the training area 1500 ft AGL and 10 km away
- 10% of SOC for 5 minutes of manoeuvring in the training area (at 20-25kW)
- 10% of SOC to return from the same training area
- 10% of SOC for 1 circuit pattern at 1000 ft AGL
- 7% of SOC for 1 circuit pattern at 500 ft AGL
Increase all of the above by a further 10% in case of high winds and/or turbulence.
Example:
- 10% of SOC for 1 circuit pattern at 1000 ft AGL – in turbulence this circuit pattern would require 11%
of SOCs.
The flight should be programmed and combined in a way that ensures the SOC at landing is no less
than 30%.
NOTE In order to improve battery life not discharging the batteries below 20% SOC is recom-
mended. Normal SOC at the end of flight should always be about 27-30%.
Stall speeds
Stall speeds at MTOM (1256 lbs / 570 kg) for the ALPHA Electro are as follows (IAS):
Flaps 0° (retracted): 44 KIAS (82 km/h)
Flaps +15° (extended): 41 KIAS (76 km/h)
Flaps +25° (extended): 39 KIAS (72 km/h)
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