I rehabed my arm years back and had a jugs gun. I could throw a tennis ball 7 mph faster than a Baseball. My guess your 80mph r-ball throw is in the low 60mph range with a baseball. Also years back there were 2 radar guns, the JUGS and the RA-gun by decatur. 90ph was a avg MLB fastball and 85mph for the RA-gun. The avg. fastball slows up 4-7 mph, it's fastest out of the hand and slows up usualy 5-6 by the time the catcher gets it. If you were a young kid in the 80's and didnt know the scout was using the slow gun you may have given up thinking low 80's wasnt good enough, but that low 80's was really high 80's. I remember watching steve avery pitch against the dodgers, he was 83mph all night long on that old black decatur slow radar gun behind the plate in Atlanta. If that was todays stalker radar it would have been around 89mph. There was also another radar gun the st louis cardinals used and it was slower than the jugs but faster than the RA gun.
The equivalent of an 80mph pitch from 47ft at 54ft is 54/47*80 = 91.9 mph.
80mph
80mph
80mph
80mph
about 70 to 80mph
75-80mph
80mph
80 mph is about 128 kph.
Stealth at Thorpe Park is 80mph fast, it launches from 0-80mph in 2.3 seconds and you go 205ft in the sky.
60mph but when they are diving down they can reach up to 80mph
70 to 80mph.