January 18, 2019:

I was proud to have been able to explain the principle of lift.

Grammar school, besotted with airplanes. It's the curvature of the wing which creates a pressure imbalance.

With a smirk he challenged: "Explain the angle of the propellors." I didn't know. His laughter was malicious.

That's my dad. Putting people down. Including his ten-year-old son.

For the record: the propellors were feathered.