Just got our altimeter - an alt15k. First trial on Sunday with "Old Faithful II" as follows:
- Rocket volume 1300ml
- water volume 400ml
- nozzle 17mm
- weight 225g approx
- pressure 200psi
- recovery horizontal descent (not as stable as usual due to weight of altimeter)
- apogee 454 feet or 138m
attached is altimeter trace
Sysonby team best
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Sysonby team best
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Re: Sysonby team best
Isn't it cool how the spinning parachute can make the curve so bumpy on the way down? It amazes me that the sensor is that precise.
Spaceman Spiff
"What goes up, must come down"
"What goes up, must come down"
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Re: Sysonby team best
We've seen that type of "bumpy" descent when using a really stretchy shock cord. The springy cord allows the rocket to bounce a lot. It makes for cruddy video of the descent too.Spaceman Spiff wrote:Isn't it cool how the spinning parachute can make the curve so bumpy on the way down? It amazes me that the sensor is that precise.
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Re: Sysonby team best
Actually that rocket is a backslider and noremally comes down perfectly horizontally, but the small weight of the altimeter unbalanced it slightly and it tumbled quite badly, almost becoming a lawn dart.
It does make you realise how narrow the scope for error is with backsliders, and how it is best to launch with an equivalent weight "dummy" camera and altimeter before using the expensive stuff!
It does make you realise how narrow the scope for error is with backsliders, and how it is best to launch with an equivalent weight "dummy" camera and altimeter before using the expensive stuff!
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Re: Sysonby team best
160psi wrote:Just got our altimeter - an alt15k. First trial on Sunday with "Old Faithful II" as follows:
- Rocket volume 1300ml
- water volume 400ml
- nozzle 17mm
- weight 225g approx
- pressure 200psi
- recovery horizontal descent (not as stable as usual due to weight of altimeter)
- apogee 454 feet or 138m
attached is altimeter trace
You personal best altitude has been added to the official water rocket record standings page.
http://www.wra2.org/WRA2_Standings.php
Keep up the good work
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Lisa Walker,
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The Water Rocket Achievement World Record Association ![WRA2 :WRA2:](./images/smilies/icon_wra2.gif)
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