Old Timers
Sanctioned in the United States by the Society of Antique Modelers, and by a growing number of "SAM" organization chapters around the world (as well as similar national clubs in some nations) so-called "Old Timer" free flight model aircraft, which can be gliders, rubber powered or engine powered models, are flyable reproductions of free flight model aircraft designs that generally originated from anywhere in the world, any time before the US involvement in World War II began in 1941-42. Scaling of the size (enlargement or reduction) of these designs are permitted for most of the event types in SAM competition, with a few specialized categories existing for reproduction models that mandate the models be built in their original size only.
In the United Kingdom, models built to plans or kits published before January 1951 are categorised as vintage and those subsequently but prior to 1960 are categorised as classic. Jim Arnott holds Winding Boy, a classic rubber model designed by Urlan Wannop.
Low-pressure, enjoyable competitions for these models generally follow the modern competition formats, with special categories for these early-design models that re-create the model aircraft events actually held before WW II, and even the "old-timer" movement has seriously begin to embrace electric powered versions of designs originally built for the two-stroke gasoline fueled engines of pre-WW II free flight aeromodelling. Actual pre-WW II vintage gasoline fueled model engines, or authentically operational reproductions of them, are even used on some of the engine-powered designs, and a substantial interest exists in so-called "RC Assist" old timer free flight models within the SAM organization, which takes the engine powered designs of that era, powers them with more modern two and four stroke glow engines or electric motors instead, and adds rudder, elevator and engine control from a radio control transmitter, just as would be done in the regular RC hobby.
Old Timer free flight aircraft specifications, competition rules and guidelines are available from the SAM organization online.
Read more about this topic: Free Flight (model Aircraft)