It's also 2560 m/s, or ~8 x the speed of sound. Good thing the article is satire and not some misguided historical proposal...

I had to reread that... I'm quite curious as to how he arrived at 5757.87.

Assuming it never goes above 5g (which from googling seems to be a realistic maximum sustained g-force limit), it would roughly mean accelerating at 5g for 1 minute, followed by 3 minutes of 6600mph, followed by 5g deceleration for 1minute

Sounds fun :)