FES Flight Manual, v1.18 May 2020
Page 5 of 35
1. General
1.1 Introduction
The FES flight manual has been prepared to provide:
1. Pilots with information for the safe and efficient operation of the sailplanes
equipped with Front Electric Sustainer Self-launcher system.
2. Sailplane manufacturers of specific sailplane types equipped with FES with all the
information necessary to prepare the flight manual of the sailplane after FES
installation.
Chapters of this manual are written as mandated by CS-22.
1.2 Certification basis
This type of powered sailplane has been designed following CS 22 Certification
Specifications for Sailplanes and Powered Sailplanes and according to Special Conditions
for electric powered sailplanes.
1.3 Warnings, cautions and notes
The following definitions apply to warnings, cautions, and notes used in the flight
manual.
Warning:
Non-observation of the corresponding procedure leads to an
immediate or important degradation of flight safety.
Caution:
Non-observation of the corresponding procedure leads to a minor
or extended degradation of flight safety.
Note:
Draws the attention on any particular item not directly related to
safety but is significant or unusual.
1.4 Descriptive data
The sailplane is equipped with a high-tech, powerful FES front electric propulsion
system developed for high performance powered sailplanes. Main parts of the FES system
are:
• Brushless electric motor
• Motor controller
• Foldable propeller
• FES GEN 2 Battery packs, with internal BMS (Battery Management System)
• Charger (600W, 1200W or 2000W)
• FCU (FES control unit) instrument
• LXUI box with Shunt (for current and voltage measurements)
• FCC box (FES connecting circuit)
• Power switch
• DC/DC converter (converts high voltage to 12V)
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