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How fast is 87 knots?

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It's about five times as fast as Flo-Jo
In other words, 87 knots is 4.776 times the speed of Flo-Jo, and the speed of Flo-Jo is 0.2094 times that amount.
(at the Seoul Olympics, 1998) (a.k.a. Florence Griffith-Joyner, a.k.a. Florence Delorez Griffith) (swimmer; 1959-1998)
Setting a world record in 1988, Flo-Jo ran a 200 m in 0:21.34 for an average speed of 18.220 knots. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.
It's about six times as fast as Noah Ngeny
In other words, 87 knots is 5.906 times the speed of Noah Ngeny, and the speed of Noah Ngeny is 0.1693 times that amount.
(in Rieti, Italy; 1999) (sprinter; 1978-)
Setting a world record at the Rieti Grand Prix in 1999, Noah Ngeny ran 1,000 m in 2:11.96 for an average speed of 14.730 knots. According to some reports, Ngeny did not begin running competitively until just three years before setting the record.
It's about six-and-a-half times as fast as a Bull
In other words, 87 knots is 6.7 times the speed of a Bull, and the speed of a Bull is 0.15 times that amount.
(for animals involved in the Running of the Bulls, a.k.a. Encierro, San Fermin, Pamplona, Spain) (herd average speed)
The herd of the annual Encierro in Pamplona, Spain runs at an average speed of 13 knots. The Encierro is run annually from July 7th through July 14th and involves 42 bulls, 77 oxen, and an estimated 17,000 runners over the course of the event.
It's about one-tenth as fast as The Speed of Sound
In other words, 87 knots is 0.13 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 7.69 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 667 knots. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 2,910 knots to 3,030 knots in water, depending on its salinity.
It's about one-tenth as fast as a Bullet (Handgun)
In other words, 87 knots is 0.117 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 8.55 times that amount.
(for .40 Smith & Wesson 135 grain Sierra JHP, VV 3N37 powder, Fed. 100 primer, Remington case) (muzzle velocity)
A 0.40 caliber Smith & Wesson bullet has a muzzle a velocity of 745 knots. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about one-fifteenth as fast as a Jet Fighter
In other words, 87 knots is 0.07 times the speed of a Jet Fighter, and the speed of a Jet Fighter is 15 times that amount.
(for Lockheed Martin F-16, a.k.a. Fighting Falcon, a.k.a. Viper) (maximum speed at altitude)
An F-16's maximum speed at altitude is approximately 1,300 knots. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).
It's about seventeen times as fast as a Crocodile
In other words, 87 knots is 17 times the speed of a Crocodile, and the speed of a Crocodile is 0.06 times that amount.
(American Crocodile, Crocodylus acutus) (swimming speed)
An American crocodile can reach speeds in the water of up to 5.40 knots. On land, larger crocodiles can "gallop" when fleeing danger at speeds of up to 11 knots.