At 10:59 AM 1/17/00 +0100, Per Lindgren wrote:
>Just a typical, estimated guess, I believe I have read somewhere that turbine
>speeds of 100.000 rpm is not unusual. Of course, this can vary form one engine

Just in general, they try to make them as small as possible, i.e. least
angular momentum, to minimise turbo lag -- consequence is higher rpm to get
the same effect.  They had 80,000 rpm turbos fifteen years ago if I
remember correctly, and I have a niggling recollection of hearing of 140k
somewhere.  That's up in dentist's air-drill territory - 2000+ revs per
second...must be fun to balance them.

d
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"