Chain tension and tensioning a chain

ahhh...learn I will, daniel-son
really though how many chain rings are alu? thought most would have been more badass alloy than lightweight foil. seems like a daft place to have a soft metal.
assumed that tight-as-poss chain (whilst not putting silly pressure on the bearings) would have meant for better transmission vs slower? especially when applying reverse pressure?

Most of my chainrings are alu.
It's heat-treated and hardened but it stills wears quicker than steel rings.
It's not like you swap them every ride.

Whilst no physics expert, a tight as possible chain means extra friction. Extra friction means wasted energy.

Perfecto..