Grumman F4F Wildcat - World War II

Grumman F4F Wildcat - World War II F4F Wildcat - Specifications (F4F-4): General Length: 28 ft. 9 in. Wingspan: 38 ft. Height: 9 ft. 2.5 in. Wing Area: 260 sq. ft. Empty Weight: 5,760 lbs. Loaded Weight: 7,950 lbs. Crew: 1 Performance Power Plant: 1 Ãâ€" Pratt Whitney R-1830-86 double-row radial engine, 1,200 hp Range: 770 miles Max Speed: 320 mph Ceiling: 39,500 ft. Armament Guns: 6 x 0.50 in. M2 Browning machine guns Bombs: 2 Ãâ€" 100 lb bombs and/or 2 Ãâ€" 58 gallon drop tanks F4F Wildcat - Design Development: In 1935, the US Navy issued a call for a new fighter to replace its fleet of Grumman F3F biplanes. Responding, Grumman initially developed another biplane, the XF4F-1 which was an enhancement of the F3F line. Comparing the XF4F-1 with the Brewster XF2A-1, the Navy elected to move forward with the latter, but asked Grumman to rework their design. Returning to the drawing board, Grummans engineers completely redesigned the aircraft (XF4F-2), transforming it into a monoplane featuring large wings for greater lift and a higher speed than the Brewster. Despite these changes, the Navy decided to move forward with the Brewster after a fly-off at Anacostia in 1938. Working on their own, Grumman continued to modify the design. Adding the more powerful Pratt Whitney R-1830-76 Twin Wasp engine, expanding the wing size, and modifying the tailplane, the new XF4F-3 proved capable of 335 mph. As the XF4F-3 greatly surpassed the Brewster in terms of performance, the Navy granted a contract to Grumman to move the new fighter into production with 78 aircraft ordered in August 1939. F4F Wildcat - Operational History: Entering service with VF-7 and VF-41 in December 1940, the F4F-3 was equipped with four .50 cal. machine guns mounted in its wings. While production continued for the US Navy, Grumman offered a Wright R-1820 Cyclone 9-powered variant of the fighter for export. Ordered by the French, these aircraft were not complete by the fall of France in mid-1940. As a result, the order was taken over by the British who used the aircraft in the Fleet Air Arm under the name Martlet. Thus it was a Martlet that scored the types first combat kill when one downed a German Junkers Ju 88 bomber over Scapa Flow on December 25, 1940. Learning from British experiences with the F4F-3, Grumman began introducing a series of changes to the aircraft including folding wings, six machine guns, improved armor, and self-sealing fuel tanks. While these improvements slightly hampered the new F4F-4s performance, they improved pilot survivability and increased the number that could be carried aboard American aircraft carriers. Deliveries of the Dash Four began in November 1941. A month earlier, the fighter officially received the name Wildcat. At the time of the Japanese attack on Pearl Harbor, the US Navy and Marine Corps possessed 131 Wildcats in eleven squadrons. The aircraft quickly came to prominence during the Battle of Wake Island (December 8-23, 1941), when four USMC Wildcats played a key role in the heroic defense of the island. During the next year, the fighter provided defensive cover for American planes and ships during the strategic victory at the Battle of the Coral Sea and the decisive triumph at the Battle of Midway. In addition to carrier use, the Wildcat was an important contributor to Allied success in the Guadalcanal Campaign. Though not as nimble as its main Japanese opponent, the Mitsubishi A6M Zero, the Wildcat quickly earned a reputation for its ruggedness and ability to withstand shocking amounts of damage while still remaining airborne. Learning quickly, American pilots developed tactics to deal with the Zero which utilized the Wildcats high service ceiling, greater ability to power dive, and heavy armament. Group tactics were also devised, such as the Thach Weave which allowed Wildcat formations to counter a diving attack by Japanese aircraft. In mid-1942, Grumman ended Wildcat production in order to focus on its new fighter, the F6F Hellcat. As a result, manufacture of the Wildcat was passed to General Motors. Though the fighter was supplanted by the F6F and F4U Corsair on most American fast carriers by mid-1943, its small size made it ideal for use aboard escort carriers. This allowed the fighter to remain in both American and British service through the end of the war. Production ended in fall 1945, with a total of 7,885 aircraft built. While the F4F Wildcat often receives less notoriety than its later cousins and possessed a less-favorable kill-ratio, it is important to note that the aircraft bore the brunt of the fighting during the critical early campaigns in the Pacific when Japanese air power was at its peak. Among the notable American pilots who flew the Wildcat were Jimmy Thach, Joseph Foss, E. Scott McCuskey, and Edward Butch OHare. Selected Sources Military Factory: F4F WildcatChuckhawks: F4F Wildcat

GAME THEORY essays

GAME THEORY essays One of the most famous and most thoroughly studied examples of game theory is the Prisoners Dilemma. In this situation, the police have caught two people and charged them with a crime. The police separate the prisoners into different rooms and give them the option of confessing. The police tell the two prisoners that they have enough evidence of the crime to send them to jail for X amount of years. However, if one prisoner confesses fully to the crime and testifies against the other but the other doesnt, then the prisoner who confessed will get get a much lighter sentence than X and the prisoner who did not confess will get a heavier sentence than X. However, if both of the prisoners confess and testify against the other, then the police have enough evidence to convict both prisoners for a slightly heavier sentence than X. Since neither of these prisoners knows what the other one is saying, we can use a decision tree to determine the dominant strategy for these people. (see fi gure A on attached sheet) In this dilemma, the dominant game strategy for the prisoners is to confess. Although the strategy for these games seems very predictable, there is a paradox that arises. The police are also a player in this game. The police have evidence to put these criminals away for only X years but if the prisoners confess, then they have enough evidence to put them away for slightly more than X years. In this situation, the police want to do all they can in their power to make these criminals confess to the crime. The actions by the authorities have to be included in the outcome of the game. The way the authorities can change the outcome of the game is to penalize the prisoners if they do not do what the authorities want. Therefore the only two actions that the authority can perform are to penalize or not penalize the prisoners. However, the dominant strategy of the authority and the impact of their actions are determ...