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Graphical Firing Scale

Model / MPN: 8213840 | NSN: 1220-00-789-2985
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A device designed in the form of a slide rule, having one or more scales of varying ranges, on either surface, and a plastic cursor with a matte to receive pencil markings of range correction. It is used with various types of ground and sky-sweeper weapons to determine quadrant elevation, angle of sight, or drift, and to calculate the trajectory of a projectile in relation to a target. It may contain scales for yards to meters conversion and gage points which are used in conjunction with the cursor and range scale to convert data given in meters to yards. Scales may be in mils for determining high angle fire, time of flight, deflection shift, and the like.

Product Details
NATO Stock Number
1220-00-789-2985
Sold in multiples of
DEMIL
NO
General Description
Rule no. 1, double-face type, rule no. 2, double-face type; hardboard body; w/cursor, plastic; scale data, scales graduated in meters, 25 to 50 meter, 27 to 50 meter, 30 to 50 meter, 500 to 5800 meter, 850 to 3600 meter, 2700 to 7400 meter, 3000 to 14500 meter, 3400 to 9000 meter, 6000 to 10000 meter, 7500 to 14000 meter, range of scales, scales graduated in mils, 2 to 15 mil, 2 to 30 mil, 3 to 7 mil, 3 to 8 mil, 3 to 11 mil, 3 to 14 mil, 3 to 15 mil, 3 to 16 mil, 3 to 27 mil, 3 to 28 mil, 3 to 38, 4 to 15 mil, 5 to 13 mil, 5 to 15 mil, 5 to 18 mil, 5 to 19 mil, 5 to 50 mil, 7 to 14 mil, 7 to 35 mil, 10 to 18 mil, 11 to 30 mil, 14 to 38 mil, 18 to 67 mil, 28 to 115 mil, 110 to 550 mil, 110 to 600 mil, 150 to 600 mil, 200 to 500 mil, 200 to 700 mil, 900 to 1150 mil, 900 to 1160 mil, range of scales, scales graduated in seconds, 4.5 to 23 seconds, 7 to 30 seconds, 10 to 34 seconds, 11 to 35 seconds, 17 to 35 seconds, 20 to 55 seconds, 30 to 37 seconds, 35 to 41 seconds, 40 to 47 seconds, 45 to 53 seconds, 50 to 60 seconds, 56 to 68 second
82138 Series Parts

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8213840 Cross Reference