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| weird results with a sine bar. |
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| Jasonb:
I think its your maths Working it out for the 0.407" stack I get 4.669 which is near as dam it your 4.7actual 0.407 / 5 = 0.0814. sin 0.0814 = 4.669 For the 1.509 stack I get 17.566 again closer to your 17.6 actual than your 16.9 theory. 1.509 / 5 = 0.3018 sin 0.3018 = 17.56574 What are you using to "check" the angle Just twigged you are using tan not sine there is a clue in the name of the bar :doh: J |
| mklotz:
--- Quote from: Jasonb on December 05, 2013, 03:36:29 PM ---I think its your maths ... sin 0.0814 = 4.669 ... sin 0.3018 = 17.56574 --- End quote --- Don't add to the confusion. You should have written: arcsin (0.0814) = 4.669 arcsin (0.3018) = 17.56574 |
| wheeltapper:
I thought I was using the wrong formula. I said I was no good at maths. Oh well , back to the drawing board, I'll just get my coat. cheers Roy. Edit I just figured my mistake, thanks guys I know were I went wrong now. |
| mklotz:
--- Quote from: wheeltapper on December 05, 2013, 04:37:28 PM ---I thought I was using the wrong formula. I said I was no good at maths. --- End quote --- Here are the pertinent formulae: Let: h = stack height L = sine bar length (distance between roll centers) A = angle then: sin(A) = h/L h = L * sin(A) A = arcsin(h/L) |
| wheeltapper:
cheers for that. Roy. |
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