Could it be a erroneous information from the instruments?
They are only accurate if you fly straight. As soon as you go sideways,
the airspeed indicator, and the VSI, will not longer be "true", since
you are adding quite a bit of airflow over the statics vents.
To get a static pressure, you must fly straight.
"Playing" with your rudders to get a better climb is quite simply....a
myth!
(And I must add that it is an urban legend that I have been hearing for
the last 25 years!)

Richard
Phoenix, AZ


On a bad day the string just refuses to lie still. On a good one it hardly ever
moves - and the vario makes happy noises.
Maybe it is a Schempp-Hirth thing, but my old Cirrus also climbs best with a
little bit of string deflection. The geometry would have a tiny two or three
degrees slip indicated if you fly perfectly co-ordinated, and it is best with
quite a lot more than that.