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14 hours ago · Development Origins YF-16 and YF-17 prototypes being tested by the U.S. Air Force The United States Navy started the Naval Fighter-Attack, Experimental (VFAX) program to procure a multirole aircraft to replace the Douglas A-4 Skyhawk, the A-7 Corsair II, and the remaining McDonnell Douglas F-4 Phantom IIs, and to complement the Grumman F-14 Tomcat. Vice Admiral Kent Lee, then head of Naval Air ...
- 18 November 1978; 44 years ago
- F/A-18A/B/C/D: 1,480
14 hours ago · Development Previous projects The origins of the Mirage 2000 could be traced back to 1965, when France and Britain agreed to develop the "Anglo-French Variable Geometry" (AFVG) swing-wing aircraft. Two years later, France withdrew from the project on grounds of costs, after which Britain would collaborate with West Germany and Italy to ultimately produce the Panavia Tornado. Dassault instead ...
- 10 March 1978
- Dassault Aviation
14 hours ago · An ice surface in fresh water melts solely by free convection with a rate that depends linearly on the water temperature, T ∞, when T ∞ is less than 3.98 °C, and superlinearly when T ∞ is equal to or greater than 3.98 °C, with the rate being proportional to (T ∞ − 3.98 °C) α, with α = 5 / 3 for T ∞ much greater than 8 °C, and ...
- 1.309
- 3400 to 37,500 kg-force/cm³
- 5 to 18 kg-force/cm²
14 hours ago · As noted, Pennsy colors and paint schemes were standardized. Locomotives were painted in a shade of green so dark it seemed almost black. The official name for this color was DGLE (Dark Green Locomotive Enamel), though often referred to as "Brunswick Green." The undercarriage of the locomotives were painted in black, referred to as "True Black."
- April 13, 1846–January 31, 1968, (renamed to Penn Central Transportation Company)
14 hours ago · Definition and applicable elements Unless otherwise noted, this article describes the most stable form of an element in ambient conditions. [b] While arsenic (here sealed in a container to prevent tarnishing) has a shiny appearance and is a reasonable conductor of heat and electricity, it is soft and brittle and its chemistry is predominately nonmetallic. Nonmetallic chemical elements are ...
