Tapered wings aerodynamic loading
 

Can someone plz explain to me why tapered wings experience higher aerodynamic loading at the tip which causes them to stall before the root (no washout) :ugh:

Tapered wings aerodynamic loading
 

Maybe books with full grammar and correct spelling are too confusing for the OP...

Try the archives, e.g., http://www.pprune.org/tech-log/12479...ml#post1250815 .
Another one (in English): http://ocw.mit.edu/courses/aeronauti...s-06/spl8a.pdf . Not that hard to find, and I am sure there are even plenty of web sources in Italian language, too. So no reason for banging your head against the wall ;).