Ah, it took me all of two minutes, but somebody kindly put "Geographical Background of the First Voyage of Columbus" on the net. See paragraphs C, D, and E.caliburn said:to Peter Ebbesen: I thought that funding was the issue for the later Columbus voyages, not the first. For the first voyage, as I recall there was almost no funding (he got three rotten, today we would say decommisioned ships and crew that needed to be completed with convicts). I think that if the Earth was round was an issue in order to get the support from the church which had a great ingluence on Castillan court, hence the trials, but I might be mistaken. Read about a long time ago. I'll browse the net a bit to confirm/oppose that.
http://muweb.millersville.edu/~columbus/data/geo/ODLCASE1.GEO
Alternatively see this article on the "flat earth" and Columbus:
http://www.lawrencehallofscience.org/pass/passv10/flat-earth.html
It goes into the distance measurements in more detail than my memory, but that should not be surprising.
All in all, it looks like those who believe the "Columbus proved the churchmen wrong by proving the world was round" story are happily deluded people who jumped on the bandwagon created by Washington Irving in his "Life of Christopher Columbus" and happily propagated in stories ever since. I have to say that that, to me, sounds much more plausible than that the learned churchmen of the council of Salamanca ignored the previous 1800 years of knowledge on the matter.
EDIT: Found a couple more academic links while searching and not surprisingly all were of fundamentally the same opinion on this subject. It would be fun if anybody could dig up an academic link that did not.
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