You don't think its a bit odd a 36 year old launching water rockets?"
No, I know dozens of people who do it.
What, in the whole world?
Something I've started playing with lately are 'water rockets'. These devices basically consist of a 'PETE'
soft drink (Soda) bottle part filled with water and pressurised with compressed air. If the bottle is
inverted when pressure is released, the air pushes the water out, and in line with Newtons 3rd law (For
every action there is an equal and opposite re-action) the bottle is propelled upwards. Actually if you do
it right, propelled doesn't really describe what happens, its more like
"BANG! Huh? where did the bottle
go?" followed some seconds later by "klonk" as bottle lands.
Of course once you've launched a plain bottle a few times the urge to improve sets in and bottles with fins
and nose weights start appear. Before you know it you're searching through recycling bins for those 'cone
neck' bottles and dreaming of multistage launches and parachutes.
I'm not alone in these endevours, it turns out that the 'net' is crawling with people of like mind, and
entering "water Rockets" in your favorite search engine will reward you with hours of fascinating reading.
A description of my Cable-Tie launcher.
Some photos from Ian's Clark & McNaughton's water rocket Regattas.
Other water rocket sites, in no particular order...
Interesting Water rocket guff, that I had to put somewhere or I'd lose it..
- The highest pressure I've measured in a 1.25 litre PETE bottle with
carbonated soft drink was 25 PSI in a soda water bottle.
- a Moss G235 quick disconnect to 12mm fitting fits perfectly in a
- An No. 8 'O' ring is 14 mm across and 2.5mm thick
- A No. 8.5 'O' ring is 15mm across and 2.5mm thick
- A No. 9 'O' ring is 16mm across and 2.5mm thick (size used in quick
- A No. 10 'O' ring is 17mm across and 2.5mm thick
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