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How fast is 139 inches per second?

It's about one-tenth as fast as a Knuckleball (baseball)
The speed of a Knuckleball (baseball) is about 1,200 inches per second.
(a.k.a. knuckler, a.k.a. floater, a.k.a. dancer, a.k.a. butterfly ball) (major league average)
The average speed of major league knuckleball pitch is 1,200 inches per second. Eddie Cicotte, who was later implicated in the 1919 Black Sox scandal, is credited with developing the pitch ca. 1906.
It's about one-tenth as fast as a Cheetah
The speed of a Cheetah is about 1,208 inches per second.
(Acinonyx jubatus)
The cheetah can reach speeds of up to 1,208 inches per second in short bursts. From a crouching position, the cheetah can attain these speeds in just 2.25 seconds.
It's about one-tenth as fast as a Hurricane
The speed of a Hurricane is about 1,300 inches per second.
(formally: Topical cyclone; a.k.a. typhoon)
A hurricane is defined by the US National Hurricane Center as a Northern Hemisphere tropical storm having one-minute average wind-speeds of at least 1,300 inches per second. Typhoons Tip (October, 1979) and Keith (October, 1997) and Hurricanes Camille (August, 1969) and Allen (August, 1980) jointly hold the record for highest tropical storm wind speeds at 3,390 inches per second.
It's about one-tenth as fast as a Curveball (baseball)
The speed of a Curveball (baseball) is about 1,300 inches per second.
(a.k.a. hook, a.k.a. hammer, a.k.a. yakker) (major league average)
The average speed of major league curveball pitch is 1,300 inches per second. In the 1940's, debate over whether there really was a curve in the curveball pitch was settled with the conclusion that the ball does curve; however, an optical illusion caused by the spin of the ball and the batter's perception of motion exaggerates the extent of the curve.
It's about one-tenth as fast as a Fastball (baseball)
The speed of a Fastball (baseball) is about 1,600 inches per second.
(a.k.a. rising fastball, a.k.a. cross-seam fastball, a.k.a. heater, a.k.a. hummer, a.k.a. smoker; for four-seam grip) (major league average)
The average speed of major league fastball pitch is 1,600 inches per second. When up against the quickest professional fastball pitchers, a batter may have less than 0.4 seconds to react to a pitched ball.
It's about one-fifteenth as fast as a Skydiver (belly-to-earth)
The speed of a Skydiver (belly-to-earth) is about 2,100 inches per second.
(Belly-to-Earth orientation, average conditions, terminal velocity)
A belly-to-Earth oriented skydiver's terminal velocity is about 2,100 inches per second. In a typical jump from 3,900 m (13,000 ft), a diver in this orientation will be in freefall for 60 seconds.
It's about one-fifteenth as fast as a Tornado
The speed of a Tornado is about 2,173.60 inches per second.
(EF2) (wind speed range average)
According to the Enhanced Fujita scale implemented by the US National Oceanographic and Atmospheric Administration, a "significant" tornado has an Enhanced Funjita scale classification of EF2 and is characterized by wind gust speeds between 1,936 inches per second and 2,411.20 inches per second. The largest recorded tornado — an F4 event occurring in Nebraska in May, 2004 — was almost 4.02 km (2.5 mi) across.
It's about one-twentieth as fast as a Skydiver (headfirst)
The speed of a Skydiver (headfirst) is about 2,800 inches per second.
(Head-to-Earth orientation or standing, average conditions, terminal velocity)
A head-to-Earth or standing-oriented skydiver's terminal velocity assuming average conditions is about 2,800 inches per second. In a typical jump from 3,900 m (13,000 ft), a diver in this orientation will be in freefall for 46 seconds.
It's about one-twentieth as fast as a Helicopter
The speed of a Helicopter is about 3,110 inches per second.
(for AH-64A Apache, a.k.a. Hughes Model 77) (maximum cruise speed)
The AH-64 helicopter, one of the primary helicopters used by the United States Army, flies at a top cruise speed of 3,110 inches per second. The AH-64 is the primary military helicopter of several nations including the United States, the United Kingdom, Israel, Japan, and the Netherlands.
It's about one-twenty-fifth as fast as a Lamborghini Gallardo
The speed of a Lamborghini Gallardo is about 3,500 inches per second.
(for Gallardo LP 550-2, a.k.a. Valentino Balboni, 2009 model)
The Lamborghini Gallardo LP550-2 model Gallardo has a top speed of 3,500 inches per second. The Gallardo can reach speeds of 1,100 inches per second in just 3.9 seconds.
It's about one-twenty-fifth as fast as The TGV (train)
Flag of France
The speed of The TGV (train) is about 3,500 inches per second.
(Train à Grande Vitesse) (for SNCF TGV Réseau, a.k.a. "Network" model, a.k.a. TGV-R) (maximum speed)
The TGV Réseau sets have a top speed of 3,500 inches per second. The train is capable of travelling the 425 km (264 mi) distance from Paris to Lyon in East-Central France in about two hours.
It's about one-twenty-fifth as fast as an Arrow (archery)
The speed of an Arrow (archery) is about 3,530 inches per second.
(250 g arrow fired from 60#/28" bow)
A 250 gram arrow will reach speeds of approximately 3,530 inches per second when fired from a 60-lb, 28-inch draw bow . Archeological evidence from the Ahrensburg valley near Hamburg, Germany indicates that arrows have been used since at least 11 to 12,000 years ago.
It's about one-twenty-fifth as fast as a Porsche 911
The speed of a Porsche 911 is about 3,600 inches per second.
(for Porsche 911 Type 997 GT2, 2007 model)
The Porsche 911 GT2 has a top speed of 3,600 inches per second. It takes just 7.4 seconds for the GT2 to accelerate to 1,760 inches per second.
It's about one-thirtieth as fast as The CRH (train)
Flag of China
The speed of The CRH (train) is about 3,800 inches per second.
(a.k.a. Hexie Hao, 和谐号, a.k.a. 和諧號, a.k.a. Héxié Hào, a.k.a. "Harmony")
The CRH-3 train which runs on China's Beijing-Tianjin Intercity Railway are capable of speeds up to 3,800 inches per second. Theses train can make the 120 km (74 mi) journey from Beijing to Tianjin in about 30 minutes.
It's about one-thirtieth as fast as a Peregrine Falcon
The speed of a Peregrine Falcon is about 4,250 inches per second.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 4,250 inches per second 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.
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