Learning to draw technical illustrations in inkscape?

"I personally wouldn't recommend Inkscape for technical drawings. It's much of an hassle to get everything just right.

Inkscape is more vector drawing oriented.

What I would suggest is Google SketchUp. It's quite easy to use and suits better for stuff that requires drawing accuracy.

Also combining both of them might be a good idea. The objects that require precision do in SketchUp and later combine them in Inkscape with additional artwork (eg. hands, text).

SVG plugin for SketchUp, is a nice tutorial how to combine Inkscape and SketchUp

Very good book Inkscape: Guide to a Vector Drawing Program (there's the free web version and the book - I highly recommend the book, it really is worth the money). It explains quite nicely Inkscape from beginning to end with nice examples.

Must read chapters for technical illustrations in there are: layering, sub-layering, connectors, tracing bitmaps and isometric projection.

Learn how to do diagrams. Basically you should know how to use clones properly.

How I usually do those kinds of illustrations is:

Draw (with a pencil) a basic outline what I'm going to do.
Then import that into Inkscape and draw all objects with really simple shapes.
I don't draw one thing twice nor do I duplicate it. I clone it - it has a nice feature that when I change the original all the clones change.
Usually I keep the originals off the page and use only clones on the page. (of course if there's more than one object of that type).
Then do the generic outline with all the things
Finally add the text to separate layer.

Also it's quite useful to have ""library"" of objects in a .svg you often use."

"Well, as far as books go, there is this one from O'Reilly, although, I beg you to reconsider your plan.

Inkscape is not something technical drawings are drawn in. For such purposes, Autocad is the industry standard in 2D with some 3D capabilities, CATIA and ProEngineer are often used (depending on preferences of the company really, ProE maybe a little more in the field of mechanical engineering) in full 3D development through all stages, and Rhino from McNeel is fast gaining popularity in the last years, being significantly cheaper and responsive (not to mention an excellent NURBS support).

I'm not saying such work cannot be done in Inkscape (a skilled hand could probably do it in Paint) - just that it usually is not done. And therefore I seriously doubt you will find an Inkscape book specifically oriented towards technical drawings."