Lees verder>>>ASK 21 sailplane spin characteristics can be controlled using tail ballast
weights, ensuring that pilots of all weights can achieve the same spin results.
Although the tail ballast weights were designed to control the centre of gravity
of the sailplane, these weights significantly affect the inertia terms that govern
the sailplane response to spin manoeuvres. Schleicher issued a Technical Note
(TN) Nr. 4 in 1980 (mainly used in Switzerland) to provide instructions for the
Aircraft Flight Manual (AFM) for spin training. These instructions did not provide
proper protection against accomplishment of single seated flight with forgotten
spin ballast installed.
