JRF Goose airplane model. The Goose, originally made by Grumman, is a light amphibian transport plane in 1937. Grumman JRF Goose has a wingspan of 50'10", and a length of 39'7". A twin-engine amphibian American designed monoplane seaplane based on a pre-war G-21 design, the Goose had showed remarkable durability. Originally envisioned as ...