swh,

Your calculation started with " if the two aircraft started of 10 ft apart " then shifted to 100 ft apart.

Yep, if you have 2x737 flying about 10 ft apart, the CGs would be about 100 ft apart.

If the CGs are 10 ft apart, they have collided, the fuselage diameter is around 12 ft.

Do I need to get the crayons out ?

I pointed out your assumption was in conflict with your calculation, not that it was realistic with some aircraft.

If you have 2 BD-5Js then the CGs are only 30 feet apart, but that should be stated as the assumption before making the remainder of the calculation.

I think the whole argument is falling apart at the seams ...