A follow up to my other video; "The Flying Scotsman and Mallard won't remain in the spotlight forever" There are a few steam locomotives may have beaten the speed record held by Mallard in the past, but were not properly documented. Some may not have beaten the record, but had good high speed performance nonetheless. A C&O 4-6-4 with Caprotti valve gear, The PRR 4-4-2 7002, UP 844, Milwaukee Road Hiawatha steam passenger engines, and N&W 611.