Flight Manual LS1-f
Issued May 2011
4.13
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
4.4.6
Flight at high altitude and at low temperatures
With temperatures below 0°C (32°F) for instance when wave flying or
flying in winter, it is possible that the control circuits could become stiffer.
Special care should be taken to ensure that there is no moisture on any
section of the control circuits to minimize the possibility of freeze up. It
could be advantageous to apply Vaseline along all the edges of the airbrake
cover plates to minimize the possibility of freezing closed.
Operate the controls regularly to prevent ice build-up.
Warning:
It is not allowed to carry waterballast.
Caution:
1.
At temperatures below -20°C (-4°F) there is the risk of cracking the gelcoat.
2.
Attention must be paid to the fact that at higher altitudes the true airspeed is
greater than the indicated airspeed.
The max. speed V
NE
is reduced according to the following table:
Table for LS1-f
Altitude
in
[m] 0-2000 3000 4000 5000 6000 7000 8000 9000 10000
VNE
IAS
km/h 250 237 225 214 202 191 180 170 160
Altitude in [ft]
0-6560 9843 13124 16405 19685 22966 26247 29528 32809
VNE
IAS
kts. 135 128 122 115 109 103 97 92 86
Table for LS1-f (45)
Altitude
in
[m] 0-2000 3000 4000 5000 6000 7000 8000 9000 10000
VNE
IAS
km/h 270 256 243 231 218 206 195 184 173
Altitude in [ft]
0-6560 9843 13124 16405 19685 22966 26247 29528 32809
VNE
IAS
kts. 146 138 131 125 118 111 105 99 93
3.
Dump the water ballast before you reach freezing altitude or descend to
lower altitudes.
4.
Do not fly below 0°C (32°F) when your glider is wet (e.g. after rain).