SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
High speed flying
At high speeds up to V
NE
= 280 km/h (151 kts, 174 mph) the Arcus M is easily
controllable.
Full deflections of control surfaces may only be applied up to V
A
= 180 km/h (97
kts, 112 mph).
At V
NE
= 280 km/h (151 kts, 174 mph) only one third (1/3) of the full deflection
range is permissible. Avoid especially sudden elevator control movements.
In strong turbulence, i.e. in wave rotor, thunderclouds, visible whirlwinds
or when crossing mountain ridges, the speed in rough air V
RA
= 180 km/h
(97 kts, 112 mph) must not be exceeded.
With the c/g at an aft position, the control stick movement from the point of stall to
maximum permissible speed is relatively small, though the change in speed will be
noticed through a perceptible change in control stick loads.
The airbrakes may be extended up to V
NE
= 280 km/h (151 kts, 174 mph).
However, they should only be used at such high speeds in an emergency or
if the maximum permitted speed is being exceeded inadvertently.
When extending the airbrakes suddenly, the deceleration forces are noticeable.
WARNING
:
Consequently it is wise to check in advance that the seat harnesses are tight
and that the control stick is not inadvertently jarred forwards when the airbrakes
are extended. There should be no loose objects in the cockpit. At speeds above
180 km/h (97 kts, 112 mph) extend the airbrakes only gradually (allow 2
seconds).
WARNING:
It is strictly noted that in a dive with the airbrakes extended, the Arcus M has to
be pulled out less abruptly (maximum 3.5 g) than with retracted brakes (5.3 g),
see section 2.9 "Manoeuvring Load Factors". Therefore pay attention when
pulling out with airbrakes extended at higher speeds!
A dive at V
NE
with the airbrakes fully extended is limited to an angle to the horizon
of 38° at maximum permitted all-up mass of 800 kg (1764 lb).
At an all-up mass of up to 690 kg (1521 lb) an angle to the horizon is more than 45°.
October 2011
Revision --
appr. 4.5.3.2
