Puzzle #244: Can you work out how fast the stagecoach was moving?

#244 Wheel-to-reel

Set by Zoe Mensch

Jim Ford and his daughter Jade were leaving the Old Hat Cinema Club after watching the classic silent western Sunset At Cactus Rock.

“What did you think?” asked Jim. “It was alright,” said Jade, “but the CGI wasn’t great. At the end, when the stagecoach was at top speed, none of the wheels were moving!”

“Ah,” smiled Jim. “That’s because those old movies were filmed at 16 frames per second.” Jade’s eyes glazed over as her dad launched into more western nerdery. “Those coaches were called ‘four-yarders’ because the circumference of the back wheels was 4 yards.”…