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Hydroaeropropulsion Rocket Research Labs
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20 september 2002
Yesterday evening, Geert added a lever mechanism to release the nails.
Advantages: nails can't get lost anymore; both of them are always released
(unlike earlier, when we got a nice ... incident when only one
nail released) and because of the lever action, you need to pull the rope
less hard (and we don't need bricks anymore; if necessary, the water supply
bottle could be used for some extra weight).
Today, the colour of Jans arm will be yellow.
The new launcher loaded and ready to shoot.
Our ingenious cork insertion device again.
After two successful launches of a 1.5 liter bottle, we now try a 2 liter one.
Maybe we'd better paint this one yellow too.
A departing 2 liter bottle.
And another one. The large blurry object is probably my finger.