The airplane you are talking about was called the Tigress.  It was a IV-P
with the firewall pushed back to accomadate the V8.   After pushinf the
firewall back it was a two place side by side IV.  The Sentry was built as a
Walter Power airplane from the start.  I believe the airplane is owned by Lee
Behel (sp?).

Wally, Skip, et al,

 

Yes, the Tigress - a one and only donated to the EAA museum.  Don Goetz would not fly it there for its final trip without wearing a parachute.  It must have been a bit touchy in the air.

 

Grayhawk