Another stall spin

I see the sailplane spin recovery procedure in the EASA
certification specs is

ailerons neutral
full opposite rudder
stick forward until rotation stops
centralise rudder and ease out of the dive

I'd guess any flap change that manufacturers recommend is more
in preparation for the likely high speeds in the dive.

http://www.easa.europa.eu/agency-mea...certification-
specifications/CS-22/Consolidated%20version%20CS-
22%20Amdt%202.pdf





At 02:54 10 September 2012, Eric Greenwell wrote:
On 8/30/2012 1:15 PM, Bob Whelan wrote:
Indeed, assuming no other changes/inputs, reducing flap
deflection
reduces lift, the glider will settle (increasing the AoA, as -
thanks
to gravity and trim forces - the plane/wing tries to regenerate
the
lost lift and return to a non-changing-acceleration state), and
the
stall speed (assuming no change in G load) increases. Kinda
makes for
a strong argument to not put oneself in the position of NEEDing
to
dump flaps (reducing the wing's camber and effective AoA) to
prevent
a spin when close to the ground, eh?

"Settling" is more of an issue at 50 feet on final, than at spin
starting at pattern altitude.

When thermalling or on final, I can change from positive to
neutral or
some negative flap, and the settling is minimal. Because it is
effective, quick to do, and loses less altitude, I think doing near
the
ground is safer than the standard procedure.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us"
to
email me)