Identifier: workofprac00algegroundrich (find matches)
Title: The groundwork of practical naval gunnery; a study of the principles and practice of exterior ballistics, as applied to naval gunnery, and of the computation and use of ballistic and range tables
Year: 1917 (1910s)
Authors: Alger, Philip Rounseville, 1859-1912 United States. Naval Academy, Annapolis. Dept. of Ordnance and Gunnery Ingalls, James M. (James Monroe), 1837-1927
Subjects: Ballistics
Publisher: Annapolis, Md., The United States Naval Institute
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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o line of fire at which wind is blowing. (4) Eead across by range scale line to correction circle, and note result; thedesired error in knots. (5) Determine sign of error by glance at plotting board. (d) To Determine Errors Due to Motion of Gun (or Target) at Given Speedand Angle with Line of Fire. Error in Range.— (Use black curve. Column 15.) (1) Eotate radial arm until target and gun range curve intersects range scaleon radial arm at given range, and clamp radial arm to upper disc. (2) Eotate lower disc until range scale line on radial arm intersects speedcircle at speed of gun (or target) in knots. Clamp discs together and unclampradial arm. (3) Eotate radial arm until range scale line intersects range circle at angle toline of fire made by course of gun (or target). (4) Eead across by range scale line to correction circle, and note result; thedesired range error in yards due to motion of gun (or target). fok therefore applies to the values of the multipliers given in the table.
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^ S A/cTi^a/ /9caaemy, o/tfa/ruary /S, 327 n (orangle;; the pointI each ship, 0 the;phere t thend oferror. nd onUting)r usemeteriratediratedThe .hren- L 8 for leightmes alegreeicularid; inin theI theyiiffer- trans- for. messes, anq ticism therefore applies to the values of the multipliers given in the table. 326 (3) cuts the scoinciden (4)range, an (b)ard in tb Err (1)curve, a curves i (3 the spethe aticoincic (sign a ( aKno I I atgiat aflinedesi racattod. (3) Kotate radial arm iuilh ^c—,^^line of fire made by course of gun (or target). (4) Read across by range scale line to correction circle, and note result; thedesired range error in yards due to motion of gun (or target). for. 327 n (orangle ;; the pointL each ship, 0 theiphere t thend oferror,ad onluting)r usemeteriratediratedThe hren- 8 forleightmes alegreeicularid; inin the1 theyiiffer- trans- :;esses, anq bicism therefore applies to the values of the multipliers given in the table.

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