The wind turbine in your story 'Whisker with a whisper' (News, 29 September) is a great idea, but as the rotor is almost spherical why not give it a vertical axis and avoid the complexity of providing alignment with the wind?
R Honnor,
Dereham, Norfolk
Vertical thinking
Gigacasting: A Breakthrough in EV Manufacturing
Lots of interesting developments here. Though the phrase "‘The Vault’ – an encased system full of magic that is easily scalable." is not...