Field Notebook: SD, WY 1961
Page 73
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Transcription
TABLE I.—Tangents and External to a 1° Curve. Chord=100 ft. Int. Angle Tangent External Int. Angle Tangent External Int. Angle Tangent External 106° 7603.5 3791.0 111° 8336.7 4386.1 116° 9169.4 5082.7 10' 7626.6 3809.4 10' 8362.7 4407.6 10' 9199.1 5107.9 20 7649.7 3827.9 20 8388.9 4429.2 20 9229.0 5133.3 30 7672.9 3846.5 30 8415.1 4450.9 30 9259.0 5158.8 40 7696.3 3865.2 40 8441.5 4472.7 40 9289.2 5184.5 50 7719.7 3884.0 50 8468.0 4494.6 50 9319.5 5210.3 107 7743.2 3902.9 112 8494.6 4516.6 117 9349.9 5236.2 10 7766.8 3921.9 10 8521.3 4538.8 10 9380.5 5262.3 20 7790.5 3940.9 20 8548.1 4561.1 20 9411.3 5288.6 30 7814.3 3960.1 30 8575.0 4583.4 30 9442.2 5315.0 40 7838.1 3979.4 40 8602.1 4606.0 40 9473.2 5341.5 50 7862.1 3998.7 50 8629.3 4628.6 50 9504.4 5368.2 108 7886.2 4018.2 113 8656.6 4651.3 118 9535.7 5395.1 10 7910.4 4037.8 10 8684.0 4674.2 10 9567.2 5422.1 20 7934.6 4057.4 20 8711.5 4697.2 20 9598.9 5449.2 30 7959.0 4077.2 30 8739.2 4720.3 30 9630.7 5476.5 40 7983.5 4097.1 40 8767.0 4743.6 40 9662.6 5504.0 50 8008.0 4117.0 50 8794.9 4766.9 50 9694.7 5531.7 109 8032.7 4137.1 114 8822.9 4790.4 119 9727.0 5559.4 10 8057.4 4157.3 10 8851.0 4814.1 10 9759.4 5587.4 20 8082.3 4177.5 20 8879.3 4837.8 20 9792.0 5615.5 30 8107.3 4197.9 30 8907.7 4861.7 30 9824.8 5643.8 40 8132.3 4218.4 40 8936.3 4885.7 40 9857.7 5672.3 50 8157.5 4239.0 50 8965.0 4909.9 50 9890.8 5700.9 110 8182.8 4259.7 115 8993.8 4934.1 120 9924.0 5729.7 10 8208.2 4280.5 10 9022.7 4958.6 10 9957.5 5758.6 20 8233.7 4301.4 20 9051.7 4983.1 20 9991.0 5787.7 30 8259.3 4322.4 30 9080.9 5007.8 30 10025.0 5817.0 40 8285.0 4343.6 40 9110.3 5032.6 40 10059.0 5846.5 50 8310.8 4364.8 50 9139.8 5057.6 50 10093.0 5876.1 Corrections to be Added (T=Tangent. E=External.) Int. Angle Curve 5° 10° 15° 20° 25° 30° 35° 40° 45° 50° 55° 60° 65° 70° 100° T=.43 E=.200 .86 .401 1.30 .604 1.74 .938 2.18 1.01 2.62 1.22 3.06 1.43 3.50 1.64 3.95 1.85 4.40 2.06 4.88 2.28 5.37 2.50 5.85 2.73 6.34 2.96 105° T=.46 E=.230 .94 .470 1.42 .700 1.90 .938 2.38 1.17 2.87 1.42 3.34 1.65 3.84 1.90 4.35 2.14 4.84 2.39 5.35 2.64 5.87 2.90 6.40 3.16 6.93 3.41 110° T=.50 E=.260 1.03 .535 1.55 .808 2.08 1.08 2.60 1.36 3.14 1.63 3.66 1.91 4.21 2.19 4.76 2.49 5.31 2.61 5.86 3.05 6.43 3.35 7.01 3.65 7.59 3.95 115° T=.54 E=.307 1.13 .624 1.70 .939 2.29 1.26 2.86 1.57 3.45 1.89 4.03 2.21 4.63 2.54 5.23 2.87 5.83 3.20 6.44 3.53 7.07 3.88 7.70 4.23 8.35 4.58 120° T=.61 E=.339 1.25 .720 1.89 1.08 2.52 1.45 3.16 1.82 3.81 2.20 4.44 2.56 5.11 2.95 5.78 3.33 6.44 3.72 7.11 4.10 7.80 4.50 8.51 4.91 9.21 5.32