FES Flight Manual, v1.18 May 2020
Page 19 of 35
4.5 Normal procedures and recommended speeds
As described in the manual of the pure glider version of the sailplane, but keep in
mind that your FES equipped glider has higher wing loading. Adjust speeds accordingly.
4.5.1 Aero tow launch
Before take-off, always switch ON the FCU instrument. Double-check that the
“Power switch” is OFF before somebody approaches the front area of the glider to attach a
tow rope to the hook. The power switch must be OFF during aero-tow!
Warning:
It is not allowed to start the motor during aero tow!
4.5.2 Winch launch
Before take-off, always switch ON the FCU instrument. Double-check that the
“Power switch” is OFF before somebody approaches the front area of the glider to attach
towing cable to the hook. The power switch must be OFF during winch launch!
Warning:
It is not allowed to start the motor during winch launch! Tow rope
must be released before running the motor.
4.5.3 Car tow launch
Before take-off, always switch ON the FCU instrument. Double-check that the
“Power switch” is OFF before somebody approaches the front area of the glider to attach a
tow rope to the hook. The power switch must be OFF during tow!
Warning:
It is not allowed to start the motor during auto tow launch! Tow
rope must be released before running FES motor.
4.5.4 Taxiing procedures
Warning:
Taxiing is not allowed when FES is installed as a sustainer
system!
Your sailplane needs to be factory equipped with a steerable tail wheel and small
wing tip wheels to be suitable for taxiing. Do not taxi with the tail dolly attached.
Taxi only on concrete or grass runways with short grass and smooth surface. Do
not taxi on rough runways; otherwise, you can damage the propeller!
To start taxiing, add a bit more power and decrease it as soon as the plane begins
moving to stop it accelerating. Avoid using the wheel brake and apply it very carefully not
to damage the propeller!
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