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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,977
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In the old days a "heavy" meant any plane over 500,000 pounds. The whale (B747) and such were all heavies. Had to do with wake turbulence and anyone flying behind a heavy needed more space to let the wake die down. Now we have the Airbus series, B75/76/77 series and military planes that all need extra room for traffic.
Penalty box is where you wait until the ATC (air traffic control) gets you up in the system. Nothing that you have done, just that you are not allowed right out in line.
Online guide? Its called experience and grey hair... By the time you spend 30 years sitting in the pointy end you mumble this in your sleep! 
JoeA
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2021 Subaru Legacy, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB
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