At first look at flying Elephant (6.4kb you will
fly with Elephant if you choose the "Fly" viewpoint :)
Flight Interpolator PROTO.
Cardinal splines curve
For flight animation we need to set orientation of our model (airplane) next.
The tangent direction .
N(t) = d/dt C(t) =
S dB_{i}(t)/dt P_{i} |

Let our model initially is oriented in

It is evident, that this transformation keeps zero banking. We can set any banking angle (the

"Unfortunately" for

As since an orientation (rotation) object includes axis and angle of
rotation (a vector and a number) therefore one can easy make *Spline
OrientationIterpolator* PROTO for viewpoint (camera) animation if the linear
OrientationIterpolator node is not enough.