chicken tikka masala.
I remember somebody telling me chicken tikka masala was the way to remember the relationship twix IAS TAS AND MACH.
of course it's all different in an open cockpit, if you climb at a constant IAS your TAS increases and your Mack flaps about in the relative airflow.
Sorry chaps, late night and an early morning, I'll just get my hat, I already have my Mack!