Caption: War Publications - WWI Compilation 1923 - Article 46
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may be replat d .\nli uf ficient accuracy (in case the error thui committed is too tenons, an estimated corn.lion is easily applied). Since (iC is small as compared with GT, the atu/lc of /, f IDC = y way <' ficient accuracy tc / ' equal to /.ICC. Then, by Section B, LGTxC Z(;7'(;:sin76X^(approx.). in • Taking LTGC as 45° ( " in cor stead of 4 3 * 5 * * ' ; " rections for obliquity rough r, wu D 100 C always considered sufficient), we approximations to the angles are X:.yi = 4 0 : 7 1 mils = 56 + mils. C, and Ti = have T = 3200 G . GTi Therefore 56 = 200: 1000 I GTi GT (appr.) - 3570 + yds 3600 yds The error committed is about 100 yds. PROBLEMS 1. In the triangle formed by the gun ( G ) , the target ( T ) , and the 1520 mils, GC = 300yds., G = 90 0 1560 mils, 90 , C GC 80 1400 mils. GC = 600 9q~ range GT by solving the right triangle and also by using the point C assume (a) (b) (c) Find rule of p. 13, and find the error. 2. In the triangle GCT assume GC 300 2000 1140 mils. parallaxes, and determine P arallaX mCth committed. By the theorem of sines 45*5 * * • 8 * Ans.: 4500 (choosing 21 ° d ~ .
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