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How fast is 774 furlongs per fortnight?

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It's about one-eight-hundred-fiftieth as fast as a Peregrine Falcon.
In other words, 774 furlongs per fortnight is 0.00119 times the speed of a Peregrine Falcon, and the speed of a Peregrine Falcon is 840 times that amount.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 650,000 furlongs per fortnight when diving. Falcons are sometimes sent to scare smaller birds away from airports to improve air traffic safety and were used in World War II to intercept carrier pigeons used by enemy forces.
It's about one-two-thousand-five-hundredth as fast as The Speed of Sound.
In other words, 774 furlongs per fortnight is 0.000375 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 2,670 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 2,060,000 furlongs per fortnight. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 9,000,000 furlongs per fortnight to 9,380,000 furlongs per fortnight in water, depending on its salinity.
It's about one-three-thousandth as fast as a Bullet (Handgun).
In other words, 774 furlongs per fortnight is 0.000335 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 2,990 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 2,300,000 furlongs per fortnight. 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-five-thousand-five-hundredth as fast as a Jet Fighter.
In other words, the speed of a Jet Fighter is 5,300 times 774 furlongs per fortnight.
(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 4,000,000 furlongs per fortnight. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).
It's about one-seven-thousandth as fast as a Bullet (Rifle).
In other words, 774 furlongs per fortnight is 0.000141 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 7,090 times that amount.
(5.56 x 45 mm, a.k.a. 5.56 NATO)
A 5.56 x 45 mm cartridge is fired at a velocity of 5,500,000 furlongs per fortnight. As the NATO rifle cartridge, it is used by the military forces of more than thirty-one countries, including use in the M16 series, M4 Carbine, HK-416, and M249 Squad automatic weapons used by the United States armed forces.
It's about one-sixty-thousandth as fast as The Space Shuttle.
In other words, 774 furlongs per fortnight is 0.0000166230 times the speed of The Space Shuttle, and the speed of The Space Shuttle is 60,158 times that amount.
(Orbiter vehicle velocity)
The space shuttle orbits at a speed of 46,561,000 furlongs per fortnight. During liftoff, the space shuttle accelerates to orbital speed in 8.5 minutes, consuming over 1.59 million kg (3.51 million lbs) of propellant in the process.
It's about one-three-hundred-thousandth as fast as a Meteor.
In other words, 774 furlongs per fortnight is 0.00000310 times the speed of a Meteor, and the speed of a Meteor is 320,000 times that amount.
(formally Meteoroid or meteorite, depending on the context; a.k.a. "shooting star", a.k.a. "falling star")
Small meteoroids enter the Earth's atmosphere at speeds between 67,000,000 furlongs per fortnight and 430,000,000 furlongs per fortnight, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 17,000,000 furlongs per fortnight.