Brother Johnathon mathematics

kws4000

Local Knucklehead
Doing completely unrelated relative computations regarding a locomotives dimensions and maximum performance, and I'm including this 4-2-0 for reference.

http://www.steamlocomotive.com/locobase.php?country=USA&wheel=4-2-0&railroad=nyc gives a credible sustained speed of 24mph; I would suspect a maximum of 30mph.

BUT

Somewhere, Somehow, I recall reading Something that stated Brother Johnathon hit up to 80mph. Now I sincerely do not believe this, but does anyone have any clue where there might be any info backing up such a ludicrus claim?

I ask principly because, if true, Brother John would be an enourmous outlier in my dataset, even with the Mallard, John Stevens, and J3a @ 700rpm included.

mohawk_hudson_4_2_0_brother_jonathan_by_rlkitterman-d9hw6f3.jpg
 
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