Recently acquired many drawings from Germany and other European countries. If course, all the parts, etc are dimensioned using metrics.
I remember reading, many, many, years ago, that if you use the metric dimensions and put them over 32, changing it to a fraction, you will construct the design about 20% larger than originally drawn. For example, if a part is 5mm, then 5/32 = 0.156 is the Imperial conversion, plus 20% enlarged, IF the finished size of the project is not critical. All dimensions are converted into fractions, and you don't have to figure out the direct metric/Imperial conversions.
The above is TOTALLY by memory and may not be valid. Disregard it all, if it's a crock. I did Not try this out before posting this question.
Are there any rules-of-thumb for QUICK conversions, assuming final size of object is not critical. I wouldn't mind if my next engine is 20% larger than drawn if it saves me time converting everything to inch equivalents.
Just asking.
Frank
I remember reading, many, many, years ago, that if you use the metric dimensions and put them over 32, changing it to a fraction, you will construct the design about 20% larger than originally drawn. For example, if a part is 5mm, then 5/32 = 0.156 is the Imperial conversion, plus 20% enlarged, IF the finished size of the project is not critical. All dimensions are converted into fractions, and you don't have to figure out the direct metric/Imperial conversions.
The above is TOTALLY by memory and may not be valid. Disregard it all, if it's a crock. I did Not try this out before posting this question.
Are there any rules-of-thumb for QUICK conversions, assuming final size of object is not critical. I wouldn't mind if my next engine is 20% larger than drawn if it saves me time converting everything to inch equivalents.
Just asking.
Frank