Cl1/2rho(Vsquared)S... nigelisom, here is the "ATPL Theory Summary."
They show and illustrate better than I can, but "n" load factor= 1/cos times the bankangle. The squrae root of the load factor= Vstall increasing factor.
http://www.freelancepilot.nl/ATPL%20summary.pdf
Essentially it is just setting up the rigth equation the right function and plugging in the values.
Mario Asselin has a great book from 1997 titled:
An introduction to aircraft performance
On page 270 on Google books too, you may find a more detailed treatment of load factors with different velocity, wind gusts:
ngust= Lgust/W= 1/2 rho (V+-u)^2 SCl/W considers an horizontal gust.
For a full treatment, purchase this inexpensive book, or go on to Google Books and read page 270, (start on page 269, which begins the topic of flying in adverse weather) among other pages... happy trails!
