In his experiments with recoilless guns, Leonid Kurchevsky strived to cover a wide range of artillery weapons. Besides their work on field artillery, his team also constructed a special fighter aircraftarmed with 76mm APK recoilless guns (1935), mounted a 305mm howitzer on an automobile, a 305mm recoilless gun on a destroyer, a 152mm recoilless gun on a torpedo boat, etc. Kurchevsky enjoyed the support of Mikhail Tukhachevsky and Sergo Ordzhonikidze in promoting his projects. Among his other inventions were a prototype of a grenade launcher, an all-terrain motor boat for polar conditions, a three-axis all-terrain wheeled and tracked vehicle, a winged torpedo, and a special hydroplane.