Swing and momentum

While going on a child swing, I was trying to explain the mechanics.

What I found myself stuck on was the momentum. As the swinger goes
higher and higher, the swing velocity on the bottom gets faster and
faster so there does his angular momentum.

Since momentum is conserved where is the other side of the angular
momentum, the only think I can think is the air must be pushed away and
so preserving the angular momentum. Okay if so then a swing should not
work in a vacuum. Which does not sound right!


--
Self control is what keeps us from being rapist.

Observations of Bernard - No 100


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