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The 1977 Birmingham–Smithfield F5 tornado's damage was surveyed by Ted Fujita and he "toyed with the idea of rating the Smithfield tornado an F6". [13] In 2001, tornado expert Thomas P. Grazulis stated in his book F5–F6 Tornadoes; "In my opinion, if there ever was an F6 tornado caught on video, it was the Pampa, Texas tornado of 1995". [14]
The F in F1, F2, etc. stands for Fujita. The scale was based on a relationship between the Beaufort scale and the Mach number scale; the low end of F1 on his scale corresponds to the low end of B12 on the Beaufort scale, and the low end of F12 corresponds to the speed of sound at sea level, or Mach 1. In practice, tornadoes are only assigned ...
all function keys have been changed over time, to the exception of F1 and F2 who have always been mapped to brightness control. all Apple laptops after 2007 are missing any Num Lock key, even if they lack a keypad (the Num Lock was previously located on the F6 key on older Apple laptops).
Formula Regional is the last category that takes place outside the F1 events format. It was created to take over from the various F3 championships around the world after the FIA deemed that the title "Formula 3" would be exclusively used by the series that runs on F1 weekends known previously as GP3.
Ferrari Tipo 044/1 3.0-litre V12 F1 engine (1995) A 2004 Ferrari model 053 V10 engine of the Ferrari F2004. This era used a 3.0 L formula, with the power range varying (depending on engine tuning) between 600 hp (447 kW) and 1,000 hp (746 kW), between 13,000 rpm and 20,000 rpm, and from eight to twelve cylinders.
F1 F2 F3 F4 F5 April 4 19 1 1 5 9 2 0 1 24 157 $29,948,500: April 5 3 0 0 2 1 0 0 0 0 1 $2,775,000: ... F5-F6 Tornadoes. St. Johnsbury, Vermont: The Tornado Project ...
The deadliest event of the sequence was an F4 tornado family that ravaged Robins Air Force Base in Warner Robins, Georgia, on April 30, killing at least 18 people and injuring 300 or more others. On May 1, a pair of F4 tornadoes also struck Alabama , causing a combined nine deaths and 15 injuries.
F1 F2 F3 F4 F5 Total 5 5 20 26 10 4 1 71 "FU" denotes unclassified but confirmed tornadoes. May 4 event ... F3: E of Lake Worth to NE of Blue Mound: Tarrant: 0120