DG Flugzeugbau GmbH
Flight Manual LS 8-18 Normal
Procedures
4.5.12 Aero Tow
(a)
Aero tow must be performed at the nose hook.
(b)
Trim slightly nose heavy: Trim position indicator in front of neutral mark.
(c)
Use wheel brake during tightening of tow cable to avoid rolling over rope.
With TN8019 executed:
It’s not recommended to use the wheel brake during tightening of the
aerotow rope.
(d)
Minimum Tow Speed
:
without water ballast
100 km/h <54 Kt., 62 mph>
with water ballast
120 km/h <65 Kt., 74 mph>
(e)
Recommended tow cable length:
30 - 80 m <100 – 260 ft>
Warning: The C.G. hook is not approved for aero tow
.
4.5.13 Free Flight
•
Stalling speed (IAS) for straight and level flight and air brakes retracted:
15m <49 ft> wing span
:
Without
water
ballast:
68-70
km/h <37-38 Kt., 42-43 mph>
With maximum water:
82-84
km/h <44-45 Kt., 51-52 mph>
18m <59 ft> wing span
:
Without
water
ballast:
65-67
km/h <35-36 Kt., 40-42 mph>
With maximum water:
79-81
km/h <43-44 Kt., 49-50 mph>
•
Circling flight:
(Thermalling) Trim stick forces to zero.
•
Best Glide Angle: between 95 to 105 km/h <51 to 57 Kt., 59 to 65 mph>
•
High speed flight: Reduce stick forces by trimming. Avoid abrupt manoeuvres and check speed
indication
regularly
to
avoid
exceeding
limit
values.
Warning: Observe air speed limits versus altitude (see page 2-2)
Warning: In emergencies, air brakes can be extended up to VNE = 280 km/h <151 Kt.,
174 mph> ;
Extend air brakes cautiously
, because in this speed range air brakes
are being sucked out suddenly, causing short time negative acceleration and may
initiate pilot induced oscillations (P.I.O.).
Warning: Check thermometer, when using water ballast, regularly during flight. When
temperature is decreasing, dump water at least at +5° Centigrade <41° F> to
ensure proper dumping and avoid structural damage at wing shell and vertical tail
fin shell (Integral tanks).
Edition: February 2011
LBA-appr. Revision - 2 (TN8019)
Page 4-14
