search google, for "super star destroyer length"
every link I've clicked has something pretaining to the 17.6 km length...be it by someone else, and ppl who have been contacted by theforce.net guy and agreed with him.
Here's a few examples just to prove myself:
found in the 3rd Paragraph:
http://www.geocities.com/Area51/Dimension/4733/empexctr.html"according to calculations based on visual observation made by Curtis Saxton in his extensive Star Wars Technical Commentaries, the Executor was actually between eleven and twelve times the length of an Imperial-class Star Destroyer. This would then place its length at between 17,600 and 19,200 meters and make it even longer than the later Eclipse- and Sovereign-class Super Star Destroyers."
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http://www.hyperjump.net/swguides/sdguide/ssdstat.htmlThis site states the "8 km" length, but also has a note at the bottem of the page by the author of the site, about the 17.6 km length idea from again "Theforce.net guy"
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Now, something from the official Star Wars Site:
http://www.starwars.com/databank/starship/superstardestroyer/bts.htmlThey say it's 12.8 km in length, BUT, it started out as 8 km long.
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I looked over the model of the SSD in XW:A it's missing 2 engines, and the hull is...well...rather smooth with just maps...there's supposed to be a whole bunch of greebles on it...but LucasArts skipped the greebling...too bad too...I really like the game other than that.
Now it's up to the campaign makers to see this info, and make up their own minds, should they change the length, or keep it?
That's my 2 cents worth for now.
Cor