SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
3.5 Spin
recovery
A safe recovery from a spin is accomplished by the following method:
a)
Hold aileron neutral
b)
Apply opposite rudder
(i.e. against the direction of rotation of the spin).
c)
Ease control stick forward until rotation ceases and the airflow is restored.
d)
Level the wings, neutralize rudder, and pull gently out of dive.
With the center of gravity in the mid to rearward position, a steady spinning motion
is possible.
After having applied the standard recovery method, the Arcus M will stop rotating
after about ½ to ¾ turn, depending on the flap position.
The loss of height - from the point at which recovery is initiated to the point at
which horizontal flight is first regained - can be up to 250 m (590 ft) and the
recovery speeds are between 130 and 210 km/h (70 – 113 kts, 81 – 130 mph).
Therefore, when recovering using a positive flap position, make sure the maximum
speed for that flap setting is not exceeded. It is recommended for positive flap
settings to change the flap setting to "0" during spin recoveries.
With the center of gravity in the foremost position, a steady spinning motion is not
possible. The Arcus M stops rotating after a half to a full turn and usually ends in a
spiral dive. In a spiral dive the sailplane accelerates very rapidly. Therefore a
spiral dive should be ended immediately.
Recovery is by normal use of opposite controls.
Note: Should the “Arcus M” enter a spin with its engine running, then - in
addition to the actions required by the above recovery method - the
throttle must immediately be closed.
Spinning may be safely avoided by following the actions given in
section 3.4 “Stall recovery”.
Recovery from a spin with a positive flap setting can be hastened by
adjusting the flaps to a negative setting.
In extreme configurations outside the allowable limits (e.g. accidental
extreme rearward c/g position or extreme asymmetric water ballast) it
may be necessary, especially in positive flap settings, to change the
flap setting to "S" to stop the rotation.
October 2011
Revision --
appr. 3.5
