peter Posted October 26, 2003 Share Posted October 26, 2003 Does anyone know of an online source of a 1:25 scale ruler? Link to comment Share on other sites More sharing options...
dominicgross Posted October 26, 2003 Share Posted October 26, 2003 White lights LX store have stencils with scale rule on the side. Failing that RS have them stock code is 860-082 Link to comment Share on other sites More sharing options...
SparkySteve Posted October 27, 2003 Share Posted October 27, 2003 I got mine from wh-smiths. triangular one with 6 different scales on for about a fiver methinks Link to comment Share on other sites More sharing options...
Brian Posted October 27, 2003 Share Posted October 27, 2003 1:25 ? what a nasty scale. Link to comment Share on other sites More sharing options...
gareth Posted October 28, 2003 Share Posted October 28, 2003 1:25 ? what a nasty scale.Not as bad as 1/4"=1' ... :o Link to comment Share on other sites More sharing options...
Potassium Neuf Posted October 28, 2003 Share Posted October 28, 2003 1:25 ? what a nasty scale.Why is that such a nasty scale ?I thought that was the standard scale for lighting plans and model boxes for scale models of sets Link to comment Share on other sites More sharing options...
Brian Posted October 28, 2003 Share Posted October 28, 2003 Why is that such a nasty scale ?It is indeed the standard for theatre work but not much else. ISO recommend the use of the 1,2,5 sequence ie 1:1, 1:2, 1:5, 1:10, 1:20, 1:50.... The nice thing about the ISO sequence is that you can use an ordinary, non-scale, ruler and do very simple maths in your head. You only need 3 simple operations...times 10 (easy peasy)times 2 (easy peasy)divide 2 (easy peasy) 1:20 is times 10 followed by times 21:50 is times 10 followed by times 10 followed by divide by 2 all of which you can do in your head. To do 1:25 it is not nearly so easy, you could do times 10, times 10, divide 2, divide 2 but you'd need to write down the intermeadiate result. Link to comment Share on other sites More sharing options...
Potassium Neuf Posted October 28, 2003 Share Posted October 28, 2003 Cheers Brian for the explanation ... now it all makes sense .. apart from why somebody chose 1:25 in the first place that is :o Link to comment Share on other sites More sharing options...
peter Posted October 28, 2003 Author Share Posted October 28, 2003 Because its half of 1:50 (which is fine for the maths) - and also because the old imperial scales convert as 1:24 and 1:48, so the metric sizings mean that the drawings would remain almost the same size as the imperial versions. Link to comment Share on other sites More sharing options...
Stu Posted October 28, 2003 Share Posted October 28, 2003 I much prefer to do my plans in 1:50 but thats just me! :o S Link to comment Share on other sites More sharing options...
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