BRLCAD available on Power Series?

[GJACKSON at TACOM-EMH2.ARMY.MIL]

I am not (as yet) a BRL.CAD user.  However, a colleague and I got into a
discussion about the merits of BRL.CAD and he made a statement something
to the effect that either BRL.CAD did not work on the Power Series, or a
version for the Power Series is unavailable at this time, or that BRL.CAD
on the Power Series had certain problems.  Could someone verify this for
me.  I find this hard to believe.

Also, I am interested in using BRL.CAD.  Some basic questions first:
1)  How does one obtain BRL.CAD?
2)  Is it available to Government and Private Industry alike?
3)  Is there a cost for Government or Private Industry?
4)  How much space does it take on the Iris computers?
5)  Approximately how long does it take one (who is well versed in
      computer graphics and basically understands CAD systems
      in general) to become capable as a basic user of BRL.CAD?

Thanks in advance ... Gerry