conversion Camair 480, 2 Continental O-470-B, 240 hp each. Camair 480C, 2 Continental IO-470- 260 hp each. 25+- built. X-16 Bi-Navion One twin-engined (130hp Lycomings) prototype designed and built by Dauby Equipment Company in 1952, production by Riley and later by Temco. Temco Riley 55 Initial version of the twin engined Navion conversion. D-16 Twin Navion Production version of the X-16 with two 150hp Lycoming O-320 engines and strengthened wings, 19 conversions by Riley and 46 by Temco. Temco D-16A Improved D-16 conversion with two 170hp Lycoming O-340-A1A engines, nacelle tanks and 20 gallon each tip tanks, 144 gallons fuel total. 45 conversions. Military L-17A Military designation for NA-154s delivered to the United States Army, 83 built, re-designated U-18A in 1962. QL-17A Six L-17As modified by TEMCO as remote-controlled drones for the United States Air Force. L-17B Military designation for Ryan-built Navion As delivered to the U.S.Army, 163 built, re-designated U-18B in 1962. L-17C L-17As modified by Ryan with improved brakes and increased fuel capacity, 35 modified, re-designated U-18C in 1962. XL-17D Three former XL-22As for evaluation. XL-22A Two Ryan-built Navion Bs for the U.S.Army, re-designated XL-17D. U-18A Former L-17As re-designated in 1962. U-18B Former L-17Bs re-designated in 1962. U-18C Former L-17Cs re-designated in 1962. Operators Civil The Navion is popular with private individuals and companies. Military Royal Hellenic Air Force United States Air Force United States Army Air National Guard Massachusetts Air National Guard Specifications (Super 260 Navion) See also References Notes Bibliography Bridgman, Leonard. Jane's All the World's Aircraft 1951–52. London: Sampson Low, Marston & Company, Ltd., 1951. Bridgman, Leonard. Jane's All the World's Aircraft 1952–53. London: Sampson Low, Marston & Company, Ltd., 1952. Harding, Stephen. U.S. Army Aircraft Since 1947. Shrewsbury, UK: Airlife Publishing, 1990. . Huber, Mark. "Accidental Classic". Air & Space, October–November 2008, pp. 42–47. Garrison, Peter. "Navion". Flying, May 1973, Vol. 92, No. 5. pp. 42–48. Gilbert, James. "Used Aircraft Pilot Report: The Navion". Flying, April 1966, Vol. 78, No. 4. pp. 54–58. Lert, Peter. "Globe/Temco Swift & Ryan Navion." Vintage Aircraft Buyer's Guide & Price Digest. Challenge Series, Volume 3, 1989. Ryan Aeronautical Company. Navion Operation Manual 3rd ed., February 1, 1949. Simpson, R.W. Airlife's General Aviation. Shrewsbury, UK: Airlife Publishing, 1991. . Simpson, Rod. The General Aviation Handbook. Hinckley, UK: Midland Publishing, 2005. . Swanborough, F. G. and Peter M. Bowers. United States Military Aircraft since 1909. London: Putnam, 1963. Taylor, John