I've seen the future and the future is stationary engines. And that's just the start until I can save up enough to secure and run a steam powered behemoth. Also, get into lawnmower racing before the big money spoils it.
a)- a size of spanner in the Imperial sizing system to fit 9/16ths of an inch nuts and bolts. b)- slightly more than half. c)- Revelation 9:16 "The number of the mounted troops was two hundred million. I heard their number."
d) the standard thread for bicycle pedals.