Lockheed F-117 Nighthawk

"F117" redirects here. For the F117-PW-100 turbofan engine, see Pratt & Whitney PW2000.

F-117 Nighthawk
Role	Stealth attack aircraft[1]
National origin	United States
Manufacturer	Lockheed Corporation Lockheed Martin
First flight	18 June 1981
Introduction	15 October 1983
Retired	22 April 2008[2]
Primary user	United States Air Force
Number built	64 (5 YF-117As, 59 F-117As)
Unit cost	US$42.6 million (flyaway cost) US$111.2 million (total program)[3]
Developed from	Lockheed Have Blue

The Lockheed F-117 Nighthawk was a single-seat, twin-engine stealth ground-attack aircraft formerly operated by theUnited States Air Force (USAF). The F-117A's first flight was in 1981, and it achieved initial operating capability status in October 1983.^[1] The F-117A was "acknowledged" and revealed to the world in November 1988.^[4]

General Dynamics F-16 Fighting Falcon

The General Dynamics F-16 Fighting Falcon is a multirole jet fighter aircraft originally developed by General Dynamicsfor the United States Air Force (USAF). Designed as an air superiority day fighter, it evolved into a successful all-weathermultirole aircraft.

Comparison of the AK-47 and M16

The German Sturmgewehr 44

An AK-47 with machined receiver

An M16A1 with 30 round magazine

The Germans were the first to pioneer the assault rifle concept, during World War II, based upon research that showed that most firefights happen within 400 meters and that contemporary rifles were over-powered for most small arms combat.^{[19][20][21][22]} The Germans sought to develop a select-fire intermediate powered rifle combining the firepower of a submachine gun with the accuracy and range of a rifle.^{[23][24][25][21]} This was done by shortening the standard 7.92x57mm cartridge to 7.92x33mm and giving it a lighter 125 grain bullet, that limited range but allowed for more controllable automatic fire.^{[26][27][28][21]} The result was the Sturmgewehr 44.^{[21][29][30][31]}

Classification (BY USER , BY FUNCTION)

By user

- what person or unit uses the weapon

• Personal weapons (or small arms) - designed to be used by a single person.
• Hunting weapon - primarily for hunting game animals for food or sport
• Infantry support weapons - larger than personal weapons, requiring two or more people to operate correctly.

Ancient and classical

Ancient weapons were evolutionary improvements of late neolithic implements, but then significant improvements in materials and crafting techniques created a series of revolutions in military technology:

Prehistoric

Very simple weapon use has been observed among chimpanzees,^[1] leading to speculation that early hominids began their first use of weapons as early as five million years ago.^[2] These would have been wooden clubs, spears, and unshaped stones—none of which would leave an unambiguous record.

Weapon

A weapon, arm, or armament is a tool or instrument used in order to inflict damage or harm to living beings—physical or mental—artificial structures, or systems. In human society, weapons are used to increase the efficacy and efficiency of activities such ashunting, crime, law enforcement, and warfare.