Minutes of proceedings of the Royal Artillery Institution (1858)
Great Britain. Army. Royal Artillery Institution · Woolwich, Eng., : The Institution · leaf 226
214 THE VALUE OF A HIGH SITE FOR COAST ARTILLERY. I. The Probable Rectangle. The dimensions of the probable rectangle, as given in the Range Tables, have to be modified when the gun is raised above the level : the breadth zone is, of course, unaffected but the length zone must be reduced in the… … For let a gun at 0, be fired at such a range that PT would represent the 50 per cent, length zone, on the level, the length zone due to the height, HO, will be given by PX. That is, if PT=l, PX=l'. Now PR=PT . sin (w+0)’ and PX is< PR. so that PX is<PT - sin («+0) ? but as a useful approximation we…
Artillery -- Periodicals · Artillery -- Great Britain -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
