Awblain:
You're not entering into a game of semantics, you're missing the point. You get horizontal gravity variations of about 1 part in 100,000. They don't matter. Period.
Well, you're half right. And I'm open minded on the other half. Just for the record you said:
there isn't any "variable gravity" until you're worried about altitudes that reach tens or hundreds of km high.
...whereas you now say 'there is variation but it isn't enough to make any difference'. I am asking you to put some flesh on this by actually showing us some of this trajectory analysis you claim will not be affected. Because, frankly, compared with the expert opinion of Dr Matthew Greaves of Cranfield University, I find the lack of substance to your contra opinion to be most unconvincing
