I don`t know, but probably not. The output of the H Merlin is quoted as 3500 to 4000 hp, which is realistic for Merlin cylinders, 6500hp would be equivalent to a Merlin rated at 3250hp. The highest rating ever actually acheived reliably on the test-beds was around 2600. Do you have any more info on this 100H24?

Pete

Yes it was indeed the Merlin H I was refering to here’s a scan of the cutaway…………….