Let me help you guys out AGAIN. Here's an fireball explosion from moab nosediving and spreads out pretty far and starts to create a pretty big plume:
http://www.globalsecurity.org/military/systems/munitions/moab.htm
A moab is 30 feet (10 metres) in length to give you a comparison to go off of.
It seems to be on its way to making a pretty big plume.
How wide do you think 93's fireball would have been when it hit to expand up to your plume size estimates?
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Your minimum:
Crash angle: "nearly 90 deg"
Fuel upon impact: 7,500 gals
Fuel % burned upon impact: 75%
Wingspan: 38m/125ft
Initial fireball width: ???
Plume width size at time of Val's photo: 600m/2,000ft
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Your maximum:
Crash angle: 40-45 deg
Fuel upon impact: 10,000 gals
Fuel % burned upon impact: 95%
Wingspan: 38m/125ft
Initial fireball width: ???
Plume width size at time of Val's photo: 1000m/3,300ft