There were three. a 35 a 41 and something like a 25 at one time
I think the 41 is the only one around now?
They are closely related to the Quadra engines
Klaus Nowak
Aerrow Inc.
905 440 4435
[email protected]
www.quadraaerrow.com
Thomas Hajek
Rolf Group International
860 633 1931
[email protected]
Hanspeter Naef
[email protected]
or
http://www.usqaero.com/