Difference between revisions of "Time-of-Flight"

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Due to [[Drag|aerodynamic drag]], the time-of-flight increases more and more quickly as range increases.  For instance, a 1,250 pound British 13.5-in shell with a 4 CRH head would take 14.28 seconds to reach 10,000 yards range, 23.8 seconds to reach 15,000 yards and 34.98 seconds to reach 20,000 yards.{{UKRangeTables1918I|Table 55}}
 
Due to [[Drag|aerodynamic drag]], the time-of-flight increases more and more quickly as range increases.  For instance, a 1,250 pound British 13.5-in shell with a 4 CRH head would take 14.28 seconds to reach 10,000 yards range, 23.8 seconds to reach 15,000 yards and 34.98 seconds to reach 20,000 yards.{{UKRangeTables1918I|Table 55}}
  
By 1908, the Royal Navy was trialling [[Time-of-Flight Watch]]es to assist spotters in identifying their own shell fall.  The watch would be set to the given gun range, started when the guns fired, and would ring a bell at the moment the shells should fall.<ref>''Fire Control, 1908'', p. 5.</ref>
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By 1908, the Royal Navy was trialling [[Time-of-Flight Watch]]es to assist spotters in identifying their own shell fall.  The watch would be set to the given gun range, started when the guns fired, and would ring a bell at the moment the shells should fall.{{FC1908|p. 5}}
 
   
 
   
 
==Footnotes==
 
==Footnotes==

Latest revision as of 17:06, 12 November 2020

Time-of-flight is the period of time between a gun's discharge and the impact of the projectile against land, sea, or other object.

Generally, time-of-flight is considered as that when a shell would strike the water, as in all but the shortest range firings the abbreviation of a projectile's flight by hitting a vessel before it reaches the water is quite small.

Due to aerodynamic drag, the time-of-flight increases more and more quickly as range increases. For instance, a 1,250 pound British 13.5-in shell with a 4 CRH head would take 14.28 seconds to reach 10,000 yards range, 23.8 seconds to reach 15,000 yards and 34.98 seconds to reach 20,000 yards.[1]

By 1908, the Royal Navy was trialling Time-of-Flight Watches to assist spotters in identifying their own shell fall. The watch would be set to the given gun range, started when the guns fired, and would ring a bell at the moment the shells should fall.[2]

Footnotes

  1. Range Tables for His Majesty's Fleet. Volume I. 1918. Table 55.
  2. Fire Control, 1908. p. 5.