I recently acquired a great set of scans from a book. Most of the drawings are 1/35th scale but some are not. The book was originally printed in a foreign language, so I think, something may have gotten lost, in translation. On some pages it's, skala 1:17,5th and on some it's 1:17, 5 scale. So two questions here, what is 1:17,5th and how do I convert it to 1/35th. A formula would help, but I can't figure the scale ??? HELP. If it's 1/17.5 ( one seventeenth point five), what does that equal in standard inches not metric??

Tru this programm :

http://www.clubhyper.com/reference/calculatorfc_1.htm

I used it since years with total satisfation.

Halve the measurements of the 1:17.5 to get 1:35.

Thanks guys. I will use both of these.

Don't worry about the measure unit, a scale is just a ratio. 1/17.5 is weird though !

Hi Richard

"Drawing in scale 1/17,5" means that all the drawing dimensions have been divided to 17,5, 1/35 means that all the dimensions have been divided to 35 and so on...units are irrelevant
To obtain 1/35 scale drawings, as rightly Gary told you, you have to halve your drawing (you can make 50% reduced photocopies)

If you have a dimensioned drawing but you don't know the scale, you have to calculate the ratio beetween the actual dimensions and the drawing dimensions

Good luck with your project Richard

Frenchy

Thanks guys. I did the one half reduction and found it to be actually .445 instead of .50. I think it's a little nit picky, but. The differences measure out in ten thousands so not so worried. A scale software utility provided by a link here in the second reply justifies .445 reduction also. Once again THANK YOU.