how to model the intel cpu fan model e30307-001
i guess you want to modeling a cpu fan. you can download the fam models and you can research how desingers models that in the model step by step .
if you cant find twisted blade you can search the "propellers". same design techiques using i guess.
if you dont know dimensions and if you havent any idea how to start modeling. you can download a simple propeler model from in grabcad. then you can research it step by step.
you will dont need dimensions first. feel free. and start to modeling it with your own dimensions.