AT-450 or Olympus has an O.D. of 5.1 Inches, the AT-400 has an O.D. of 4.7 inches...
And BOTH engines have been succesfully installed on a KingCat.
Thrust at idle is 1.3LB (400) & 1.5LB (450)
Rodney Evans
Chief Technician
US Micro Jet LLC
900 Glendale Milford Rd.
Cincinnati, Ohio 45215
http://www.usmicrojet.com
1-888-894-5387
[email protected]