Ha !!
, It's still in the 'pipeline'....
My 'old' work on this was on another old laptop, using real-time 2D physics, which I just recently found !
I had coded the Java/Javascript to take into account various physical size/shape & Mass bodies in space,
with both Gravitational &/or Magnetic properties, involving real time forces both from surface to surface,
as well as between centres of such masses. (Graphically demonstrated in real time).
This also applies for a shape 'inside' of a shape. However...
Awhile back, 'CatalinaWOW' said in answer to me....
A little thought shows that the last statement is not generically true. As I sit in my totally enclosed region of space (my house) I am not floating off of my chair. The symmetry of the matter outside the hollow does matter.Well...Obviously the scale/masses of a person in a chair reacting to his 'house', and while 'ON' the Earth's
surface, has
NO bearing on the original question what so ever xxx, but
one thing I realized I should clarify,
is that
MY comments about being inside a 'hollow shell', should state, (as that's what I mean), that the
WALLS of
such a 'shell' should be of
EVEN thickness/mass, be it a circle or an ellipse etc !!!
(NOT obviously (for example) like an 'egg' shaped Hollow, inside a 'cube' outer shape !!)
That put me off, but if interested, I will re-create the scenarios/info, with a real time video-clip of the action.
P.S.
I know you are
'stirring', however in regard to your proposed new 'travel Company'.....
....
The Earth, as it is not hollow, is 'different' than the scenarios talked about, and so the 'Gravitational-Pull'
on you as you '
descended', would only '
gradually' decrease, until at the 'centre' where the 'balance' of the
gravitational 'pull', is now 'equal' in all directions !, (although 'effectively' now zero) .
Have a great day !