SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
4.5.7
High altitude flight
When flying at high altitude it should be noted that true airspeed (TAS)
increases in relation to indicated airspeed (IAS). This difference does not af-
fect the structural integrity or load factors, but to avoid any risk of flutter, the
following indicated values (IAS) must not be exceeded
Altitude V
NE
(IAS)
Altitude
V
NE
(IAS)
m ft
km/h
kts
mph
m
ft
km/h
kts
mph
0-2000 0-6562 280 151 174
3000 9843 270 146 168 7000 22966
220 119 137
4000 13123 263 142 163 8000 26247
207 112 129
5000 16404 245 132 152 9000 29528
195 105 121
6000 19685 232 125 144 10000 32808
182 98 113
Flying at temperatures below freezing point
When flying at temperatures below 0° C (32° F), as in wave or during the
winter months, it is possible that the usual ease and smoothness of the
control circuits is reduced.
It must therefore be ensured that all control elements are free from moisture
so that there is no danger of them freezing solid. This applies especially to
the airbrakes!
From previous experience, it has been found to be beneficial to cover the
mating surfaces of the airbrakes with “Vaseline” along their full length so that
they cannot freeze together. Furthermore the control surfaces should be
moved frequently.
When flying with water ballast observe the instructions given in
section 4.5.6.
October 2011
Revision --
appr. 4.5.7.1
