WACO VPF-7
The Waco F series is a series of US-built general aviation and military biplane trainers of the 1930s from the Waco Aircraft Company. The UPF-7 was a tandem trainer with wide-track undercarriage and 220 hp Continental R-670 (designated PT-14 by the USAAC). The VPF is essentially a model UPF with a 225 hp Jacobs L-4 engine. It was designed as a trainer/combat aircraft for the Guatemalan Air Force.