FES Discus 2c - Page 3

FES Flight Manual, v1.18 May 2020
Page 3 of 35
4.3 Daily inspection ............................................................................................... 17
4.4 Pre-flight inspection ........................................................................................ 18
4.4.1 Preflight test run ....................................................................................... 18
4.5 Normal procedures and recommended speeds .................................................. 19
4.5.1 Aero tow launch ........................................................................................... 19
4.5.2 Winch launch ............................................................................................... 19
4.5.3 Car tow launch ............................................................................................. 19
4.5.4 Taxiing procedures .......................................................................................... 19
4.5.5 Self-launch and climb ................................................................................. 20
4.5.6 Free flight ................................................................................................. 20
4.5.7 Low-speed flight and stall behaviour ........................................................... 21
4.5.8 Cruise and climb with a running motor ........................................................ 21
4.5.9 Approach .................................................................................................. 23
4.5.10 Landing ..................................................................................................... 23
4.5.11 Flying with water ballast ............................................................................. 24
4.5.12 High altitude flight ...................................................................................... 24
4.5.13 Flight in the rain ......................................................................................... 25
4.5.14 Aerobatics .................................................................................................. 25
5. Performance .......................................................................................................... 26
5.1 Introduction .................................................................................................... 26
5.2 Approved data ................................................................................................ 26
5.2.1 Airspeed indicator system calibration .......................................................... 26
5.2.2 Stall speeds ............................................................................................... 26
5.2.3 Take-off performance (only for self-launch approved types of sailplanes) ...... 26
5.3 Non-approved further information .................................................................... 27
5.3.1 Demonstrated crosswind performance ........................................................ 27
5.3.2 Glide performance ..................................................................................... 27
5.3.3 Flight polar ................................................................................................ 28
5.3.4 Powered flight performance ....................................................................... 28
5.3.5 Noise data ................................................................................................. 29
5.3.6 Electromagnetic interferences .................................................................... 29
6. Weight and balance ................................................................................................ 30
6.1 Introduction .................................................................................................... 30
6.2 Weight and balance record and permitted payload-range .................................. 30
6.3 Weight of all non-lifting parts ........................................................................... 30
6.4 Maximum weight ............................................................................................. 30
7. General sailplane and systems description ............................................................... 31
7.1 Introduction .................................................................................................... 31
7.2 Cockpit controls .............................................................................................. 31
7.3 Instrument panel ............................................................................................ 31
7.4 Landing gear system ....................................................................................... 31
7.5 Seats and safety harness ................................................................................. 31
7.6 Pitot and static system .................................................................................... 31
7.7 Air brakes system ............................................................................................ 32
7.8 Baggage Compartment .................................................................................... 32
7.9 Water ballast system ....................................................................................... 32
7.10 Power plant ................................................................................................. 32
7.11 Battery packs ............................................................................................... 32
7.12 Electrical system .......................................................................................... 32
7.13 Miscellaneous equipment .............................................................................. 32
8. Sailplane handling, care and maintenance ................................................................ 33