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Once you've set up your terrain and prepped your vehicle, there's still one thing that can affect your total speed: what you do on the hill. As an obvious example, a running start will launch you more quickly than a push. However, this can be difficult to pull off, especially if multiple people are trying to squeeze into one vehicle.
Speaking of those extra passengers, their weight will boost your speed—at least, up to a point. "The more kids you get in a sled, the faster it goes," says Bagley, but "there does seem to be a tipping point." If you're in a long, flat-bottomed sled, then add a passenger or two; however, inner tubes won't safely accommodate more than one person.
Tube - Speed - Weight - Arms - Rider—but
That doesn't mean you can't boost an inner tube's speed. To add weight, just link arms with another rider—but don't try to join too many tubes together. Bagley's students have experimented with connecting more than two inner tubes, but, he says, this actually slowed them down instead of increasing the...
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