The Fairchild Model 24, also called the Fairchild Model 24 Argus and UC-61 Forwarder, is a four-seat, single-engine monoplane light transport aircraft designed by the Fairchild Aviation Corporation in the 1930s. It was adopted by the United States Army Air Corps as UC-61 and also by the Royal Air Force. The Model 24 was itself a development of previous Fairchild models and became a successful civil and military utility aircraft.
Design and development
Fairchild Aircraft was hit hard by the Great Depression in the early 1930s as airline purchases disappeared. Consequently, the company attention turned to developing a reliable and rugged small aircraft for personal and business use. The Fairchild 22 became somewhat of a hit and led directly to the new and much improved Model 24 which gained rapid popularity in the early 1930s, noted for its pleasant handling characteristics and roomy interior. Having adapted many components from the automotive industry (namely expansion-shoe brakes and roll-down cabin windows), the aircraft was also affordable and easy to maintain. In production continuously from 1932 to 1948, the aircraft remained essentially unchanged aerodynamically and internally, with the addition of extra passenger seating and optional equipment. The first models were equipped with only two seats, but in 1933 a third seat was installed and by 1938 a fourth was added. The interior was first created for the Model 24 in 1937 by noted American industrial designer Raymond Loewy. A minor airframe revision was made in 1938 with the redesign of the vertical fin and redesignation from C8 to F24G onwards.
As an innovative concept, the aircraft was available with two powerplants, Warner's reliable Scarab and Fairchild's in-house 200 hp Ranger series in the F24 C8D, E and F. Initially the 1932 model Fairchild 24 B8C used a reliable and popular Warner 125 hp radial engine, and the Fairchild 24 C8C used the Warner 145 hp radial. American Cirrus III and Menasco Pirate inline engines were also occasionally used in some earlier Fairchild 24s. Later models such as the popular 24Ws upgraded to the 165 hp Warner Super Scarab.
Designed for operations from relatively unimproved grass airfields, the sturdy undercarriage construction used a vertical oil dampened cylinder above the wheel with a pivoting strut attached to the lower fuselage. The result was a complex but undeniably solid undercarriage that could absorb large shocks and was also adapted for the fitting of twin floats for water-based operations.
The sturdiness of construction of the aircraft has ensured many have survived to this day. Some suggest the massive spruce main spars can be loaded up to 10g, and while that figure is unproved, all prewar utility category aircraft were designed to withstand at least 4.1g as opposed to the 3.8g postwar design limit standard.
The Fairchild 24 built by Kreider-Reisner Aircraft, Hagerstown, Maryland, a division of Fairchild Aviation Corporation, remained in production from 1932 to 1948, essentially the same airframe but with various powerplant and configuration enhancements. In all, Fairchild constructed over 1,500 Model 24s, with an additional 280 being constructed by the Texas Engineering & Manufacturing Company (TEMCO) in Dallas when that company purchased the manufacturing rights after World War II.
Operational history
In civil use, the aircraft was a quick sales success, with prominent businessmen and Hollywood actors purchasing the aircraft. In 1936, the US Navy ordered Model 24s designated as GK-1 research and instrument trainers. The type was also used by the US Army as a light transport and by the Coast Guard, with the designation J2K-1. The Civil Air Patrol operated many Fairchild UC-61/24s, and some aircraft were fitted with two 100-pound bombs for what became successful missions against German U-boats off the east coast of the United States in the early stages of the Second World War. The UC-61 was also procured by the US Navy as the GK-1 and by the British Royal Air Force as the Fairchild Argus.