Flap may refer to:
FLAPS, originally based on Two Four Jacks or Black Jack, is a shedding-type card game for two or more players that is popular in the United Kingdom and Czech Republic. The sole aim of Flaps is to discard all of the cards in one's hand; the first player to play his final card, and ergo have no cards left, wins the game.
The game uses a custom deck of cards written in both English and Czech. The game has seven levels, each level adding new functionality.
FLAPS is played with a custom deck of playing cards.
Each player at his turn may play any card from his hand that matches the suit or the rank of the card previously played; for example, if the previous card was a seven of clubs, the next player may put down any seven card, or any club card, from his hand. Should the player not have any card available to play or not wish to go, he must pick up one card.
Players are initially dealt seven cards. The remainder of the deck is placed face down and serve as a "pool" or drawing stack. At the beginning of the game the topmost card from the "pool" is revealed and play begins.
Flaps are devices used to alter the lift characteristics of a wing and are mounted on the trailing edges of the wings of a fixed-wing aircraft to reduce the speed at which the aircraft can be safely flown and to increase the angle of descent for landing. They do this by lowering the stall speed and increasing the drag. Flaps shorten takeoff and landing distances.
Extending flaps increases the camber or curvature of the wing, raising the maximum lift coefficient — the lift a wing can generate. This allows the aircraft to generate as much lift, but at a lower speed, reducing the stalling speed of the aircraft, or the minimum speed at which the aircraft will maintain flight. Extending flaps increases drag, which can be beneficial during approach and landing, because it slows the aircraft. On some aircraft, a useful side effect of flap deployment is a decrease in aircraft pitch angle which lowers the nose thereby improving the pilot's view of the runway over the nose of the aircraft during landing. However the flaps may also cause pitch-up depending on the type of flap and the location of the wing.