[gamegoblin]

On a 1km runway you could get up to 700kph with 3g of acceleration over 10 seconds. I think some rollercoasters pull higher G's than that.

[squeaky-clean]

Rollercoasters generally warn the elderly and those with heart conditions not to ride them. Commercial aircraft pull about 1.3 G maximum.

[kaba0]

Oh, I imagined a much smaller runway — of course longer ones could be more than good from this aspect.