Page 2
Ltd. Record of revisions Any revision of the present manual, except actual weighing data, must be recorded in the following table and in case of approved Sections endorsed by the responsible airworthiness authority. The new or amended text in the revised page will be indicated by a black vertical line in the left hand margin, and the Revision No.
Page 3
Ltd. List of Effective Pages Section Page Date of Section Page Date of Issue Issue 09/16 09/16 Appr. 09/16 09/16 Appr. 09/16 09/16 Appr. 09/16 Appr. 09/16 Appr. 11/17 Appr. 09/16 09/16 09/16 09/16 Appr. 09/16 Appr. 11/17 Appr. 09/16 Appr.
Page 4
Ltd. Section Page Date of Section Page Date of Issue Issue 09/16 09/16 09/16 09/16 09/16 09/16 09/16 09/16 11/17 11/17 11/17 09/16 11/17 11/17 Document No.: G304eS/AFMSupp, R01 0 -3 Date of Issue: 11/17...
Ltd. Table of Contents Section General ..................1 (a non-approved section) Limitations ................2 (an approved section) Emergency procedures ............3 (an approved section) Normal procedures ..............4 (an approved section) Performance ................5 (a partly approved section) Weight and balance / equipment list ........6 (a non-approved section) Sailplane and systems description ........
Ltd. SECTION 1 1. General Introduction Certification basis Warnings, cautions and notes Descriptive data Three view drawing Three-view drawing Document No.: G304eS/AFMSupp, R00 Date of Issue: 09/16...
Page 7
Ltd. Introduction The sailplane flight manual supplement has been prepared to provide pilots with information for the safe and efficient operation of the Glasflügel 304 eS sailplane. This manual includes the material required to be furnished to the pilot by JAR-22. It also contains supplemental data supplied by the sailplane manufacturer.
Page 8
Ltd. Descriptive data Glasflügel 304 eS is a self-sustaining sailplane version of the HPH 304S–Shark equipped with electric motor and foldable propeller. Power-plant Sailplane is equipped with a high-tech powerful FES front electric propulsion system developed for high performance sailplanes. Main...
Ltd. SECTION 2 2. Limitations Introduction Airspeed Airspeed indicator markings Weight Center of gravity Approved manoeuvres Manoeuvring load factors Flight crew Kinds of operation 2.10 Minimum equipment 2.11 Aerotow 2.12 Other limitations 2.13 Limitation placards 2.14 Power-plant 2.14.1 Motor 2.14.2 Battery packs 2.14.3 Power-plant instrument markings 2.14.4 List of RPM warnings 2.14.5 List of voltage warnings...
Page 10
Ltd. Introduction Section 2 includes operating limitations, instrument markings, and basic placards necessary for safe operation of the Front Electric Sustainer system. The limitations included in this section and in Section 9. have been approved by the EASA. Airspeed Airspeed limitations and their operational significance are shown below: Speed Remarks...
Page 11
Ltd. Airspeed indicator markings Airspeed indicator markings and their color-code significance are shown below: Marking Value or range IAS Significance [km/h] KIAS [mph] Blue Best rate-of-climb speed v line Weight Maximum weight in baggage compartment 2 kg 4.4 lbs Center of gravity There is no change in permitted CG position.
Page 12
Ltd. 2.10 Minimum equipment The instruments as well as the appropriate parts of the minimum equipment must be of an approved type. Minimum equipment 1 Airspeed indicator (color marked as in par.2.3.) 1 Altimeter Outside air temperature indicator (OAT) with sensor (when flying with water ballast) ...
Page 13
Ltd. 2.13 Limitation placards AIRSPEED LIMITATION IAS V PO Powrplant max. oper. speed 160 km/h 86 KIAS 100 mph V PO Max. speed to start motor 160 km/h 86 KIAS 100 mph V PO Min. speed to start motor 80 km/h 43 KIAS 50 mph FCU UNIT must be turned ON...
Page 14
Ltd. 2.14.3 Power-plant instrument markings FES power plant has a FCU instrument with high resolution sunlight visible colour display. Detailed data about FCU and its operation can be found in separate FES FCU INSTRUMENT manual. Important indications and warnings there are listed in this chapter. NOTE It is always pilots decision when to stop the motor.
Page 15
Ltd. 2.14.4 List of RPM warnings Condition Level FCU warning Required action Warning messages of propeller speed (RPM) Yellow RPM Keep attention on RPM between yellow 4300 - 4500 digits Reduce power to RPM over Red RPM digits decrease RPM below 4500 4500 2.14.5 List of voltage warnings...
Page 16
Ltd. WARNING If pilot do not stop motor in case of warning Critical Voltage, Stop motor!, red warning message appears, counting down 30 seconds. After 30 second FCU will stop motor automatically, in order to protect batteries from over discharge. During 30 seconds of count-down pilot can decide to press throttle knob to override automatic motor stop.
Page 17
Ltd. Condition Level FCU warning Required action Motor temperature warning messages Motor High Reduce power to Motor temperature is Yellow > 70°C, Reduce keep continuous high, more than70°C power! operation Motor Ext. High Motor temperature is extremely high, more > 90°C, Stop FES Stop FES motor than 90°C motor!
Ltd. SECTION 3 3. Emergency procedures Introduction Canopy jettison Bailing out Stall recovery Spin recovery Spiral dive recovery Other emergencies 3.7.1 Motor fail to start 3.7.2 Power loss during flight 3.7.3 Fire 3.7.3.1 Fire on the ground 3.7.3.2 Fire during flight 3.7.4 Loss of 12V electrical power in flight Document No.: G304eS/AFMSupp, R00...
Page 19
Ltd. Introduction Section 3 provides checklist and amplified procedures for coping with emergencies that may occur during flight with motor in operation. Canopy jettison WARNING Before canopy jettison, stop motor and switch OFF power switch, if there is still enough time to do that. 1.
Page 20
Ltd. Spin recovery Not affected. Spiral dive recovery Not affected. Other emergencies 3.7.1 Motor fail to start In the event that the motor fail to start, continue flying as a pure glider. NOTE Check if you maybe forgot to switch the Power switch ON. Reminding message (on the FCU)“Check power switch”...
Page 21
Ltd. If motor starts and there is any strange behaviour under power: · stop the propeller from the wind milling phase with the electronic brake. · After propeller is stopped, switch OFF Power switch In case that you are not able to stop propeller, you will need to land with the propeller in wind milling phase.
Page 22
Ltd. 3.7.3 Fire Fire in battery compartment during the flight can be recognized by fire alarm. If the fire alarm starts (beeping and red light appears on instrument panel) proceed immediately according section 3.7.3.2. NOTE Fire alarm is based on smoke or temperature detection. If there is a high amount of dust particles inside battery compartment fire alarm may start warning.
Page 23
Ltd. 3.7.3.2 Fire during flight stop motor immediately switch OFF the “Power switch” open front ventilation if not already opened open canopy side window land as soon as possible (or bail out if appropriate) extinguish fire after landing 3.7.4 Loss of 12V electrical power in flight During soaring flight: If electronic instruments (radio, flight computer, FCU etc) stop working, during soaring flight, than continue to fly as a pure sailplane.
Ltd. SECTION 4 4. Normal procedures Introduction Rigging and de-rigging Daily inspection 4.3.1 Charging the Battery packs 4.3.2 Installation of Battery packs into sailplane 4.3.3 Motor starting on the ground Pre-flight inspection Normal procedures and recommended speeds 4.5.1 Takeoff and climbing 4.5.2 Cruise and climbing with running motor 4.5.2.1...
Page 25
Ltd. Introduction Section 4 provides checklist and amplified procedures for the conduct of normal operation. Normal procedures associated with optional systems can be found in section 9. Rigging and de-rigging Not affected. Daily inspection Daily inspection should be performed before each flight day opening, both after rigging the sailplane and parking in a hangar.
Page 26
Ltd. 4.3.2 Installation of Battery packs into sailplane Open cover Check that Power switch (Key) is OFF Check that FCU instrument and all other instruments (Flight computer, Flarm, Radio, Transponder, PDA...) are switched WARNING Make sure that both battery packs are fully charged before installation into sailplane.
Page 27
Ltd. 4.3.3 Motor starting on the ground Remove propeller covers and a tail dolly Open battery compartment cover Check that Power switch is OFF Insert connecting cable between the battery packs Switch ON BMS switch of each battery pack Seal battery compartment cover with glider tape Seat into the glider, and close canopy Check that no one is around propeller zone, in front of glider or in line of propeller...
Page 28
Ltd. Normal procedures and recommended speeds 4.5.1 Takeoff and climbing Aerotow WARNING It is not allowed to start FES motor during aero tow! Winch-launching WARNING It is not allowed to start FES motor during winch launch! Towing rope must be always released before running FES motor. 4.5.2 Cruise and climbing with running motor FES can be used for long continuous cruise at low power settings, or climbing at higher power settings!
Page 29
Ltd. Use about 4kW of power for horizontal flight, and more for climbing. Maximum climb rate depends on glider type and it is affected by its weight, speed, flaps position etc. Available maximum power is reducing slowly due to voltage drop, during discharging of battery packs.
Page 30
Ltd. 4.5.2.2 Propeller positioning Your system is equipped with automatic positioning of blades, the electronics will rotate them in horizontal position. After electronic braking stops motor, wait for 2-3 second, until RPM data shows zero RPM. After that automatic positioning will start! You can always stop automatic positioning by pressing throttle knob.
Page 31
Ltd. 4.5.3.2 Taking Battery packs out of sailplane Check that Power switch (Key) is OFF Check that FCU instrument and all other instruments (Flight computer, Flarm, Radio, Transponder...) are switched OFF Open cover Take out connecting cable between the packs Take out RED + and BLACK - power connectors Fix supply cables to the side of battery compartment box Remove both temperature sensor connectors, from each...
Page 32
Ltd. 4.5.4 Flight in rain and icing conditions It is allowed to fly trough light rain, with running motor if necessary. However use only lower RPM settings, suitable for horizontal flight, to avoid damaging propeller blades. Stop motor if rain becomes stronger. Never use motor in icing conditions.
Page 33
Additional Pb battery in the battery compartment is optional equipment. 5. Propeller blades have been properly uninstalled and gaps between spinner and rest of fuselage sealed. See FES-HPH- P1-102 Propeller manual, chapter 5 and 304eS/MMSupp chapter 3.22 for propeller blades installation/removal instruction.
Page 34
1. Position of CG lies within permitted range. See chapter 6.6 for proper CG position determination. 2. Propeller blades have been properly uninstalled and gaps between spinner and rest of fuselage sealed. See FES-HPH- P1-102 Propeller manual, chapter 5 and 304eS/MMSupp chapter 3.22 for propeller blades installation/removal instruction.
Ltd. SECTION 5 5. Performance Introduction Approved data Non-approved data 5.3.1 Speed polar 5.3.2 Demonstrated crosswind performance 5.3.3 Rate of climb 5.3.4 Range 5.3.5 Maximal altitude that can be sustained. Document No.: G304eS/AFMSupp, R00 Date of Issue: 09/16...
Page 36
Ltd. Introduction Section 5 provides approved data for airspeed calibration, stall speeds and non-approved further information. The data in the charts has been computed from actual flight tests with the sailplane using average piloting techniques. Approved data Not affected. Document No.: G304eS/AFMSupp, R00 Date of Issue: 09/16...
Page 37
Ltd. 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.
Page 38
Ltd. SECTION 6 6. Weight and Balance Maximum permitted load of permanent tail water ballast tank Maximum permitted load of wing water ballast tank Maximum permitted load of drainable tail water ballast tank Founding of CG position in case of motor and battery packs removed.
Page 39
Ltd. Introduction Not affected. Weight and Balance Record and permitted payload- range Not affected. Maximum permitted load of permanent tail water ballast tank Not affected. Maximum permitted load of wing water ballast tank Not affected. Maximum permitted load of drainable tail water ballast tank Not affected.
Page 40
Ltd. Founding of CG position in case of battery packs removed. WARNING Position of sailplane CG in case motor and battery packs removed must be determined by weighting of sailplane in intended configuration. Sailplane CG and empty weight must lie in permitted range of Trim plan (G304S/FM chapter 2.5) Weighting procedure is described in G304S/MM.
Page 41
Ltd. CG calculation - battery packs removed: [kg] Empty weight of fully equipped sailplane [mm] CG position of empty fully equipped sailplane [kg] Pilot and parachute weight Document No.: G304eS/AFMSupp, R00 Date of Issue: 09/16...
Ltd. SECTION 7 7. GENERAL SAILPLANE AND SYSTEMS DESCRIPTION Introduction Cockpit controls Instrument panel 7.3.1 FCU instrument 7.3.2 Power switch Landing gear system Seats and safety harness Pitot and static system Airbrake system Baggage compartment Water-ballast system 7.10 Power-plant 7.10.1 General 7.10.2 Motor description 7.10.3 Propeller description 7.10.4 Wiring...
Page 43
Ltd. Introduction This Section provides description and operation of the propulsion systems. Cockpit controls Cockpit Ventilation During powered flight, front ventilation valve in centre of the spinner, should be opened. This is important as during powered flight, especially at high power settings, motor needs sufficient amount of cooling air.
Page 44
Ltd. Instrument panel 7.3.1 FCU instrument Detailed information about FCU Instrument unit there are listed in FCU Instrument manual. 1. ON/OFF switch - for FCU power supply 2. Throttle/brake knob (Rotary encoder button) by rotation clockwise is used as throttle from 0-100% of Power by rotation counter clockwise is used as electronic propeller brake by pressing is used for changing menus and resetting alarms...
Page 45
Ltd. Always turn ON first FCU, and then “Power Switch” if you want to run motor! WARNING Make sure that FCU instrument is switched ON, before Power switch is turned ON! Landing gear system Not affected. Seats and safety harness Not affected.
Page 46
Ltd. 7.10 Power-plant 7.10.1 General Sailplane is equipped with a high-tech powerful FES front electric propulsion system developed for high performance sailplanes. Main parts of the FES system are: Brushless electric motor Controller for motor Foldable propeller ...
Page 47
Ltd. CAUTION Emergency card must be placed in sailplane cockpit during all sailplane operation with battery packs installed. Document No.: G304eS/AFMSupp, R01 Date of Issue: 11/17...
Page 48
Max Voltage 180V More detailed data about motor which is used on G 304 eS powered sailplane there are described in separate FES HPH M100 MOTOR manual. 7.10.3 Propeller description Propeller consists of hub connected to the motor and two foldable, fixed pitch propeller blades.
Page 49
Ltd. More detailed data about propeller which is used on G 304 eS powered sailplane there are described in separate FES HPH P1 102 PROPELLER manual. 7.10.4 Wiring FES wiring consists of power, signal and 12V wires, and different types of connectors.
Page 50
Ltd. 7.10.7 FCU control unit description FCU control unit serves for controlling of FES power-plant. FCU unit enables power setting of motor, monitoring of remaining energy in accumulators and monitoring of important power-plant parts temperatures. In case of improper use of power-plant, low voltage in accumulators, warnings are displayed at FCU unit.
Ltd. SECTION 8 8. Sailplane handling, care and maintenance Introduction Power-plant inspection periods Sailplane alterations or repairs Ground handling / road transport Cleaning and care Tie down Document No.: G304eS/AFMSupp, R00 Date of Issue: 09/16...
Page 52
Ltd. Introduction Not affected. Power-plant inspection periods Refer to the Operating, Maintenance and Repair Manual, Document G304eS/MM_Supp for more information on the sailplane periodical inspections. Sailplane alterations or repairs Not affected. Ground handling / road transport Propeller On the ground propeller blades should be protected with a special blade protection covers, which prevents propeller blades from opening.
Page 53
Ltd. CAUTION Do not leave battery packs in the parked car under sun in hot summer, as they might be exposed to high temperatures. NOTE If you want to manufacture your own battery transporting box. Ask manufacturer for information about box necessary box qualities to ensure safe transport of the battery packs.
Need help?
Do you have a question about the Glasflugel 304 eS and is the answer not in the manual?
Questions and answers