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FES MAINTENANCE MANUAL
Version 1.16
For sailplane types:
LAK17A FES, LAK17B FES, MiniLAK FES
Silent 2 Electro FES, AS 13,5m FES
HPH 304ES FES
Discus-2c FES, Ventus-2cxa FES, Ventus 3F
Diana 2 FES
LZ design d.o.o., • Brod 3D, 1370 Logatec, Slovenia • tel +386 59 948 898
info@lzdesign.si
•
www.front-electric-sustainer.com
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Table of Contents
Related Manuals for LZ design LAK17A FES
Summary of Contents for LZ design LAK17A FES
- Page 1 LAK17A FES, LAK17B FES, MiniLAK FES Silent 2 Electro FES, AS 13,5m FES HPH 304ES FES Discus-2c FES, Ventus-2cxa FES, Ventus 3F Diana 2 FES LZ design d.o.o., • Brod 3D, 1370 Logatec, Slovenia • tel +386 59 948 898 info@lzdesign.si • www.front-electric-sustainer.com...
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Page 2: Table Of Contents
FES Maintenance manual, v1.16 May 2020 Table of Contents 1. Important notices ..................... 3 1.1 Limited Warranty ....................3 2. Introduction ......................4 3. Description of the FES system ................... 4 3.1 General layout ..................... 4 3.2 Description of main FES components ..............6 3.2.1 Electric motor .................... -
Page 3: Important Notices
This FES system is warranted to be free from defects in materials or workmanship for two years from the date of purchase when installed by LZ design. Within this period, LZ design will, at its sole option, repair or replace any components that fail in normal use. -
Page 4: Introduction
FES Maintenance manual, v1.16 May 2020 2. Introduction The FES Maintenance manual contains information for pilots, technicians, and mechanics about safe and proper maintenance of the sailplanes equipped with FES (Front Electric Selflaunch/Sustainer) system. This information is given following the requirements of EASA CS 22.1529 for sailplane maintenance. - Page 5 FES Maintenance manual, v1.16 May 2020 Connection of the instruments to the FES 12V power supply circuit. Page 5 of 24...
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Page 6: Description Of Main Fes Components
FES Maintenance manual, v1.16 May 2020 3.2 Description of main FES components 3.2.1 Electric motor The FES system uses an outrunner type motor with brushless synchronous permanent magnet and an electronically controlled 3 phase commutation system. The rotor position is measured using three hall sensors, with an additional fourth hall sensor used for automatic propeller positioning. -
Page 7: Propeller
FES Maintenance manual, v1.16 May 2020 3.2.2 Propeller The FES system uses a foldable fixed-pitch carbon fibre composite propeller. It is designed and tested according to EASA CS 22 Subpart J. The propeller blades are made from glass and carbon fibre composite in metal moulds, which are CNC machined. -
Page 8: Fcu Instrument
FES Maintenance manual, v1.16 May 2020 3.2.3 FCU instrument FCU instrument was developed for the FES system by LXNAV – known in the gliding community for their excellent flight computers (LX8000, LX9000) and electronic variometers. LXNAV manufactures FCU instruments exclusively for the FES system. Technical specification: −... -
Page 9: Battery Packs
FES Maintenance manual, v1.16 May 2020 3.2.4 Battery packs The battery packs have been developed specifically for the FES system. There are 14 cells, all wired in serial (14S) in each battery pack. A standard FES system requires a pair of battery packs. -
Page 10: Other Components
FES Maintenance manual, v1.16 May 2020 3.2.5 Wiring FES wiring consists of: 1. POWER CABLES − For power cables, we use high-quality Betatherm 155 wires with a cross-section of 35 sqmm. − On the end of power wires, suitable cable shoes and Radsok power connectors are pressed and soldered. - Page 11 FES Maintenance manual, v1.16 May 2020 FCC box is where all signal and 12V wires meet and are distributed to the right consumers. It houses a microprocessor for automatic propeller positioning, a 2A fuse, a potentiometer for adjusting the electronic brake, and a female DB9 connector used when updating the FCU.
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Page 12: General Fes Wiring Scheme
FES Maintenance manual, v1.16 May 2020 3.3 General FES wiring scheme Page 12 of 24... -
Page 13: Fes Maintenance
FES Maintenance manual, v1.16 May 2020 4. FES maintenance 4.1 Maintenance of main FES components 4.1.1 Motor maintenance We designed the FES motor such that it does not require any special maintenance. Opening or disassembling the motor can void the warranty! It is Warning: very dangerous due to powerful magnets installed on the rotor! To ensure proper operation of the motor, please consider the following:... -
Page 14: Normal Procedures And Inspections
FES Maintenance manual, v1.16 May 2020 4.2 Normal procedures and inspections 4.2.1 Rigging and de-rigging of an FES equipped sailplane Please refer to the sailplane’s manual. Remove the cable connecting the battery packs during rigging and Warning: de-rigging if the batteries are installed in the fuselage. 4.2.2 Daily inspection It is essential to inspect the glider after rigging. -
Page 15: After Flight Inspection
FES Maintenance manual, v1.16 May 2020 4.2.3 After flight inspection Always remove the connecting cable between the battery packs Caution: after landing. (Older packs with external BMS: Always remove the Power fuse after landing and put safety covers on the exposed terminals.) Make sure that the Power switch is OFF before removing the Warning: connecting cable (or the Power fuse). -
Page 16: Storing And Transportation
FES Maintenance manual, v1.16 May 2020 4.2.6 Storing and transportation A FES sailplane should be transported and stored in a high-quality enclosed trailer constructed of metal or fiberglass reinforced plastics with adequate insulation and ventilation characteristics. − Lighter fuselages can be secured against forward and jumping motions with a nose cone support in the shape of the spinner with a recess for propeller blades in the horizontal position, covered with a soft and thick material. -
Page 17: Adjustments
FES Maintenance manual, v1.16 May 2020 4.3 Adjustments The following FES system items have to be checked and adjusted if they are out of the allowable range: 1. Early LAK FES aircraft only: The gap between spinner and fuselage should be around 0,5 –... -
Page 18: Removing And Installing The Motor
FES Maintenance manual, v1.16 May 2020 Installing the battery packs into the sailplane: Make sure that you fully charge both battery packs before Warning: installation into the sailplane. Both battery packs must have an approximately equal voltage of cells (approx. 4.16 V per cell). The total voltage difference of each battery pack must be less than 1 V! 1. -
Page 19: Mounting And Removal Of The Propeller
FES Maintenance manual, v1.16 May 2020 Installing the motor into the glider To install the motor back into the aircraft, follow the steps above in the reverse order with the following additional steps: 1. Open ventilation fully – push the ventilation lever forward. 2. -
Page 20: Periodical Inspections
FES Maintenance manual, v1.16 May 2020 5. Periodical inspections 5.1 Introduction This section introduces a list of inspections designed to ensure the safe operation of the FES system during its lifetime. Qualified personnel, authorized to do sailplane inspections, should perform these inspections at the time of regular sailplane inspections. -
Page 21: Annual Inspection
FES Maintenance manual, v1.16 May 2020 5.4 Annual inspection It is necessary to check the sailplane every 12 months following the 100 flight hours inspection. Additionally, please check if we published any updates to FES manuals on the FES website under the download section! 5.5 Inspection after a rough landing or ground loop After a rough landing or ground loop, please do the following: −... -
Page 22: Repairs
FES Maintenance manual, v1.16 May 2020 9. Repairs 9.1 List of potential problems The charger does not start charging Check if the power cord is plugged into a wall outlet The charger does not start charging Check if the connecting cable is connected between the battery pack (DATA) and charger The charger does not start charging Check electrical grid fuse... -
Page 23: List Of Spare Parts
FES Maintenance manual, v1.16 May 2020 9.2 List of spare parts − propeller blades − propeller pins with spacer, crown nut, and safety pin − propeller holder − special propeller covers − FCU instrument − FCC box (FES Connection Circuit) −... -
Page 24: Revision History
FES Maintenance manual, v1.16 May 2020 10. Revision History October 2013 The initial release of Maintenance manual, Version 1.0 November 2013 Minor updates, Version 1.1 June 2015 Minor updates, Version 1.11 September 2016 Minor updates, Version 1.12 October 2017 Minor updates, Version 1.13 March 2018 Minor updates, Version 1.14 May 2020...
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