See post 23 on this thread

http://forum.keypublishing.co.uk/showthread.php?t=79328

There are pictures around as I re-call see some in the Airfix Magazine many years ago (Decemebr 1970)

One here http://www.spyflight.co.uk/chipmunk.htm

Also http://www.planepictures.net/netshow.php?id=684091