Where do you get an engine for something like this? A new built replica of the original would be incredibly expensive. An old engine block would be extremely unlikely. A modern engine would cut into the meaning of the word replica. It’s like a “restored” Mustang that has 90% new pieces. Not that I’m complaining. Everyone likes to see these birds fly. I sound like Mr. Crabbypants but I’m perplexed by where the lines are drawn. Paramount, of course, is safety. No one wants these to crash and maybe get someone hurt so a modern engine would be best for that purpose. ...
"It is powered by a Rolls-Royce Continental four cylinder engine of 100hp. The greater power of the modern engine is cancelled out by the smaller, higher revving modern propeller which, perhaps surprisingly, does not provide the same thrust as the seemingly lower powered 1910 design."
https://www.shuttleworth.org/discover/collection/aircraft/bristol-boxkite-replica
At least that should make it easier to operate.
Sounds like they are using either an O200 or IO240. The first is a Continental design built under license, the second is a Rolls Royce derivative of COntinental designs. IO240 was originially ocnsidered for the Cessna 152 before management went with the Lycoming O235.
