How can i get mechanical plans with dimensions for design ?
to begin modling i need design for parts how can i get it for engine as example ??
The simplest thing is design your own part.
Than dimensions come as you go along.
Reverse modeling is nice and easy but real modeling from scratch
can bring out the best in you.
My suggestion to you...be a desingner and design....
Good luck and succes..
Google what you want to model and add something like "dimensions" or "engineering drawing" to your search.
If you have something at hand you want to try and model then a tape measure, rule and measuring callipers are pretty much all you need other than pencil and paper to write down the dimensions.
There-after, refer Hans's answer