Originally Posted by shecky
"Tornado" I haven't heard of. "Torpedo" on the other hand was used by Sachs (and still by SRAM).
If you can read German, take a look at this site of various Sachs two speed hub gears:
http://www.3gang.de/3-gang/2-gang_naben.htm
Thanks for the info. I'll put my glasses on and look at the hub again.