this is the right topic of our team's record submission. Other topic in this forum ("Team Tommaso Valerio & soci Class D record submission") is wrong and should not be considered.
On 31st October 2015 we launched our rocket. There are a photo of the rocket and a photo of the unmodified bottle in the attachment. Two bottles were used: one to build the pressure vessel, another for the payload. Rocket volume is 1,5 liters. Its weight is 150 g. We used launchpad alTImeter to measure height and deploy a parachute which slows the rocket to 7 m/s (descent ratio).
You'll watch first the ground video, then the on board one.
LAUNCH 1
Time: 15:52
Pressure: 6.0 bar (87 PSI)
Water: 470 ml (31% of pressure vessel volume)
Height: 183 feet (55.8 m)
[youtube][/youtube]
LAUNCH 2
Time: 16:27
Pressure: 6.0 bar (87 PSI)
Water: 500 ml (33%)
Height: 157 feet (47.9 m)
[youtube][/youtube]
LAUNCH 3
Time: 16:44
Pressure: 6.3 bar (91 PSI)
Water: 500 ml (33%)
Height: 187 feet (57.0 m)
[youtube][/youtube]
HEIGHT
Averaged height will be: (183+187+157)/3 feet = 176 feet (53,5 meters).
SIMULATOR DATA
Simulator at http://cjh.polyplex.org/rockets/simulation/ for out launches predicted apogee between 50 and 62 meters (using different coefficients of drag).
For any questions ask me
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Thank you for paying attention
![Thank You TH:](./images/smilies/thx.gif)