engine. 100 built for Colombia. Chilean Falcon O-1E design built under license in Chile, 10 later sold to Brazil. One example ended up in Paraguay as passage fee for the remaining aircraft. It operated mostly as a VIP transport, but made at last one reconnaissance flight over the Chaco war fields armed with two machine-guns from a Potez. Bolivia Cyclone Falcon Similar to Colombian Falcon, it was fitted with the Wright SR-1820F-2 Cyclone radial piston engine. A total of nine were built for Bolivia in some odd variants from the Colombian ones. Bolivian Cyclone Falcons mounted one frontal .30 MG and most also one rear .30 MG instead of the two wing-mounted ones. Two had semi-cockpit canopies over pilots cockpit; two had windscreens instead of canopy in both cockpits, these two had no ring mount for rear machine gun. Operators Military operators Bolivian Air Force Public Force of São Paulo State Brazilian Air Force Chilean Air Force Colombian Air Force Finnish Air Force Paraguayan Air Force Peruvian Air Force Philippine Army Air Corps United States Army Air Corps United States Marines United States Navy Civil operators National Air Transport operated 14 aircraft. Specifications Model 37H (A-3B) See also References Bibliography Hagedorn, Dan and Antonio Luis Sapienza. Aircraft of the Chaco War. Atglen, Pennsylvania: Schiffer Publishing, 2000. . External links Curtiss A-3 fact sheet on National Museum of the USAF website Curtiss A-3B fact sheet on National Museum of the USAF website Curtiss Falcons History and specifications from the reference book American Combat Planes of the 20th Century by Ray Wagner "The West Point Of The Air"" Popular Mechanics, June 1930—photos pages 936 (middle), 939 (top) and 940 (bottom) Falcon family Single-engined tractor aircraft Biplanes 1920s United States attack aircraft 1920s United States fighter aircraft 1920s United States mailplanes Aircraft first flown in 1925