Hopper car outlet gate mechanical flap to prevent pellet loss

An outlet gate/gate assembly for a hopper car, the outlet gate/gate assembly comprising:

• a trough section, wherein the trough section comprises opposing slanted sheets and an end sheet at each end of the opposing slanted sheets, wherein the trough section defines a trough, and wherein each end sheet provides a trough discharge opening fluidly connected with the trough;
• and
• an end tube/end adapter assembly fluidly connected with each end sheet, wherein the end tube/end adapter assembly comprises an end adapter, an outlet cap, and an end tube seal/end adapter gasket, wherein the end tube seal/end adapter gasket is positioned between the end sheet and the end adapter, wherein the end tube seal/end adapter gasket comprises a base plate and a primary/main flap, wherein the base plate defines a gasket discharge opening, and wherein the primary/main flap is connected to the base plate and configured such that, in a closed position, the primary/main flap completely covers the gasket discharge opening, wherein the outlet cap is positioned on a first side of the end adapter that is opposite of a second side where the end tube seal/end adapter gasket is positioned.