Team Tommaso Valerio & soci Class D record submission

[Lost on a tree]

Hi,

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: 15:45
Pressure: 5,9 bar (86 PSI)
Water: 480 ml (32% of pressure vessel volume)
Height: 157 feet (47.9 m)

[youtube][/youtube]

LAUNCH 2

Time: 15:52
Pressure: 6.0 bar (87 PSI)
Water: 470 ml (31%)
Height: 183 feet (55.8 m)

[youtube][/youtube]

LAUNCH 3

Time: 16:27
Pressure: 6.0 bar (87 PSI)
Water: 500 ml (33%)
Height: 157 feet (47.9 m)

[youtube][/youtube]

LAUNCH 4

We launched the rocket again but this time the rocket "self-launched" (as you can see nobody pulls the release string) because of gardena connector failure (it was not properly locked). I don't know if this launch is valid. If this launch is valid, record height will be the average of launches 2, 3, and 4. If not, height will be the average of launches 1, 2, and 3.

Time: 16:44
Pressure: 6.3 bar (91 PSI)
Water: 500 ml (33%)
Height: 187 feet (57.0 m)

[youtube][/youtube]


HEIGHT

If launch 4 is valid, height will be: (183+187+157)/3 feet = 176 feet (53,5 meters). This is the average of launches 2, 3, and 4.

If launch 4 is not valid, height will be: (157+183+157)/3 feet = 166 feet (50.5 meters). This is the average of launches 1, 2, and 3.

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 .

Hoping launches are valid,


(P.S. Sorry for terrible grammar)

[Lost on a tree]

I forgot the attachments

[WRA2]

There is nothing in the rules that would prohibit the use of the "self launch" flight.

Which launches does the team wish to declare for the official record attempt?

(I fixed the issue where the video players were not showing too).

[Lost on a tree]

We would like to submit launch 2 (183 ft - 55.8 m), launch 3 (157 ft - 47.9 m) and launch 4 (187 ft - 57.0 m).

Averaged height is 176 feet or 53.5 meters.

If necessary I can post again links and launch details.

[WRA2]

Please repost the vidieos and info for the chosen flights in a new topic (makes it easier for members to find the info during the review and voting process).

[Lost on a tree]

Ok, I have just posted again the details and the viedos in a new topic.