This threat is only for information grabbing, to help the developer, 3rd partys or yourself.
Please do not write "thanks" threats or other comments. this is not a discussion threat.
Please write only links to sites, where you can get blueprints and manuals.
For Aircraft:
http://www.cockpitinstrumente.de/
http://www.avia-it.com/
http://avialogs.com/
http://www.aircraft-manuals.com/
http://www.eflightmanuals.com/
http://www.luftfahrt-archiv-hafner.de/
http://www.manualsontheweb.com/ (found through Helzra, thanks)
http://www.flight-manuals.com/index.html (posted by ElAurens in an other thread)
http://aircraftdrawingsdownload.com/index.php
For Vehicles, Cars, and so on:
http://www.smcars.net/
http://www.the-blueprints.com/
http://dreadnoughtproject.org/