wood chipper help

[IRON MAN]

I have a drum type chipper
what should the clearence be for the knife's

and can someone ID this chipper?

http://i276.photobucket.com/albums/kk18/greg31-31/Image005-4.jpg

http://i276.photobucket.com/albums/kk18/greg31-31/Image000-1.jpg

 

[ddivinia]

That looks like a serious rig.