Jens True
19fd1eb5be
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75 lines
3.2 KiB
HTML
75 lines
3.2 KiB
HTML
<script>
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function Calculate_Softshackle(obj)
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{
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//All calculations in centimeters
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tail = 53.33 * obj.line_diameter.value;
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length1 = obj.shackle_length.value;
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size = obj.line_diameter.value;
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body = length1 - 5.56 * size;
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//Strech factor
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stretch = 1.2;
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if (size == .2) stretch = 1.1875;
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if (size == .3) stretch = 1.23;
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if (size == .4) stretch = 1.23;
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if (size == .5) stretch = 1.21538;
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if (size == .6) stretch = 1.2;
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//Calculate
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var inner_diameter = body / Math.PI - 1.5 * size;
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var inner_diameter_streched = inner_diameter * Math.PI / 2;
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var load_diameter = (body - 6 * size) / Math.PI - 1.5 * size;
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var length = 2 * tail+ (1 + stretch) * body + 5.33* size;
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var mark1 = tail;
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var mark2 = stretch * body;
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//Assign, round and format
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obj.inner_diameter.value = inner_diameter .toFixed(1) +"cm";
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obj.inner_diameter_streched.value = inner_diameter_streched.toFixed(1) +"cm";
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obj.load_diameter.value = load_diameter .toFixed(1) +"cm";
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obj.length.value = length .toFixed(1) +"cm";
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obj.mark1.value = mark1 .toFixed(1) +"cm";
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obj.mark2.value = mark2 .toFixed(1) +"cm";
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}
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</script>
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<form onsubmit="false;">
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<div class="form-group">
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<label for="shackle_length">Shackle length (Tip of eye to inside of knot)</label>
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<input type="number" min="0" step=".1" class="form-control form-control-lg" id="shackle_length" placeholder="Enter shackle length" onChange="Calculate(this.form)">
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<label for="line_diameter">Line diameter</label>
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<select class="form-control form-control-lg" name="line_diameter" onChange="Calculate(this.form)">
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<option value=".2">2mm</option>
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<option value=".3">3mm</option>
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<option value=".4" selected>4mm</option>
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<option value=".5">5mm</option>
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<option value=".6">6mm</option>
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<option value=".8">8mm</option>
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<option value="1.0">10mm</option>
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<option value="1.2">12mm</option>
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</select>
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<button type="button" class="btn btn-primary" onClick="Calculate_Softshackle(this.form)">Calculate</button>
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</div>
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<hr>
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<div class="form-group">
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<label for="inner_diameter">Inside diameter closed</label>
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<input type="text" readonly class="form-control-plaintext" id="inner_diameter">
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<label for="inner_diameter_streched">Inside diameter closed and streched</label>
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<input type="text" readonly class="form-control-plaintext" id="inner_diameter_streched">
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<label for="load_diameter">Max diameter of load</label>
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<input type="text" readonly class="form-control-plaintext" id="load_diameter">
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<label for="length">Total line needed</label>
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<input type="text" readonly class="form-control-plaintext" id="length">
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<label for="mark1">Mark1 - From end</label>
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<input type="text" readonly class="form-control-plaintext" id="mark1">
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<label for="mark2">Mark2 - From first mark</label>
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<input type="text" readonly class="form-control-plaintext" id="mark2">
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</div>
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</form> |