[Urban]

Generaly my source are :

First,Constructor data :

http://www.sukhoi.org/eng/planes/military/
http://www.dassault-aviation.com/fr/defense
http://www.as.northropgrumman.com/by...ity/index.html
http://www.migavia.ru/eng/
.... and a lot

Second or for old aicraft, specialised site like :
http://www.vectorsite.net/
Ordata ...

At last ressort wiki

Maybe a good start to avoid this kind of discution (i have the best source, no it's me..) is to give a list of "trusted" sources ?