Writing as an Aerospace Engineer?

I think it doesn't really matter which kind of engineer you are - Writing will be very important. I am an E.E. Engineer working in the space industry. Now to answer your questions:

1) Emails are an ever present thing. Both internal emails with questions and answers, and external emails to industry partners or ESA and NASA representatives. However, the biggest part of writing is the documentation. Technical Documents and Non-Technical Documents with analyses and reporting about tests and design of products.

2) I write Design Reports, Test Reports, Test Procedures, Technical Notes, Analysis Reports, Requirements Analysis, Verification Documents etc.

3) Unclear writing will make it problematic to co-operate between departments and also, for the documents which will be reviyewed by NASA and ESA representatives, it needs to be clear why we are doing the stuff we're doing, what we did and how we did it.

4) We produce documents using a given format, many times these formats are given by NASA and ESA.

5) All the time. Depends on the product we are developing. Internally I work closely with our Mechanical department and Software Department.

6) Technical Notes from industry. Documents I can find from universities. Books. (Physics Forums ;) )

7) I write documentation and emails every day (in general). Sometimes much, sometimes only a few lines.

8) Not necesarily. It all depends on the context and what I am writing. I try to be clear and precise in what I write (in all cases), staying clear of ambiguity.