100px|The two Northrop YF-23s
The Northrop YF-23 was a single-seat, twin-engine fighter aircraft
designed for the United States Air Force (USAF). In the 1980s, the USAF
began looking for a replacement for its fighter aircraft, especially to
counter the USSR's advanced Su-27 and MiG-29. Several companies
submitted design proposals; the USAF selected proposals from Northrop
and Lockheed. Northrop teamed with McDonnell Douglas to develop the
YF-23, while Lockheed, Boeing and General Dynamics developed the YF-22.
The YF-23 was stealthier and faster, but less agile than the
competition. After a four-year development and evaluation process, the
YF-22 was announced the winner in 1991 and entered production as the
Lockheed Martin F-22 Raptor. The U.S. Navy considered using one of the
ATF aircraft types to replace the F-14, but later canceled these plans.
The two YF-23 prototypes were on exhibit in museums as of 2009.
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Today's selected anniversaries:
Henry Bolingbroke, Duke of Lancaster, deposed Richard II to become
Henry IV of England, merging the Duchy of Lancaster with the crown.
The AH-64 Apache, the primary attack helicopter for a number of
countries, made its first flight.
Construction of the Kwun Tong Line, the first line of Hong Kong's MTR
rapid transit system, was completed.
Xerox, Intel and Digital Equipment Corporation published the first
Ethernet specifications , currently the most widespread wired local
area network (LAN) technology.
The first photographs of a live giant squid in its natural habitat were
taken by Japanese researchers.
Wiktionary's word of the day:
1. (from the Latin word for skin, "cutis") To form skin, as, the wound
area was left to cutify.
2. (from "cute" + "-ify", perhaps modeled on "beautify") To
as, she cutified her room
Wikiquote quote of the day:
Observe the wonders as they occur around you.
Don't claim them. Feel the artistry
moving through, and be silent.
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