Hi,

OK, too much noise here, let's just refrain from replying to personal
attacks shall we.

Anyway, speed is the magnitude of the velocity vector. In a constant speed
turn, speed is (obviously) constant, but the velocity is continuously
changing. This is by definition. It doesn't matter how you or anyone else
uses these terms. Speed is just a number, Velocity is speed plus a
'direction' variable. Since acceleration is the rate of change of velocity
(dv/dt), the above mentioned aircraft in the constant speed turn is
accelerating.

Hilton