to add the rudder trim to the earlier airplanes advertised. 108-3 The 108-3 introduced a taller vertical fin with a rudder featuring a straight trailing edge. Larger fuel tanks ( versus ) were also fitted. The -3 has a higher gross weight than its predecessors of . 1760 built by Stinson and Piper. 108-4 The 108-4 was a higher powered model 108, sn 108-4693, NX149C, not certified, flown experimentally by Stinson, later by Piper, 1 built. Flying Station Wagon The "Flying Station Wagon" version was an option available with the -1, -2 and -3 models, had a utility interior incorporated wood paneling and a reinforced floor, allowing of baggage in the passenger compartment. The aircraft could be fitted with wheel, float or ski landing gear. The single 108-4 built was a Flying Station Wagon. 108-5 A single 108-5 was built by Univair, who purchased the Stinson 108 type certificate from Piper, in 1964. The 108-5 used a Franklin 6A-335-B1 engine. Univair offered kits to convert earlier aircraft to this standard. The 108-5 brought total model 108 production to 5,261, of which 5,135 were built by Stinson, 125 by Piper, and 1 by Univair. Operators Spanish Air Force operated eighteen 108-3 aircraft, with the designation L.2. Specifications (108 Voyager 150) See also References Further reading External links High-wing aircraft 1940s United States civil utility aircraft Model 108 Single-engined tractor aircraft