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A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

1 stage to 944'

Post your team or personal best. To be displayed on the WRA2 standings page(Altimeter Data and Videos are optional)
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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 5:40 pm

Reptiglorandrockets wrote:
Water Rocket Expert wrote:I posted a picture of the pet part of it in the Q & A part of this forum under "Spambot" which is locked.
That looked like a PET bottle rocket, didn't you say it was a 11' FTC Water rocket?
That part was destroyed an desposed of yesterday. That was the second stage that didn't work.


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Re: 1 stage to 944'

Post by arjan » Sun Dec 15, 2013 6:17 pm

Are you saying that the rocket in the picture was the second stage? So you where using the ftc as the first (booster) stage?


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 6:47 pm

arjan wrote:Are you saying that the rocket in the picture was the second stage? So you where using the ftc as the first (booster) stage?

Yes that was the booster the 11' included the pet bottle 2nd stage.


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Re: 1 stage to 944'

Post by arjan » Sun Dec 15, 2013 6:53 pm

So you put the altimeter in your booster?


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Re: 1 stage to 944'

Post by Reptiglorandrockets » Sun Dec 15, 2013 7:12 pm

Water Rocket Expert wrote:
arjan wrote:Are you saying that the rocket in the picture was the second stage? So you where using the ftc as the first (booster) stage?

Yes that was the booster the 11' included the pet bottle 2nd stage.
How does the booster not buckle during launch?


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 7:25 pm

The rocket fell off during flight at appogee but I did not relize my staging mechaism did not work and it had no pressure in it. They both went the same height. Why are you so suspicious of this launch? I told you the altimeter could have malfunctioned.


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 7:26 pm

By the way I looked at the benjamin .357 and liked it. You should get it. That would be swell/awesome.


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Re: 1 stage to 944'

Post by WRA2 » Sun Dec 15, 2013 7:56 pm

Water Rocket Expert wrote:The rocket fell off during flight at appogee but I did not relize my staging mechaism did not work and it had no pressure in it. They both went the same height. Why are you so suspicious of this launch? I told you the altimeter could have malfunctioned.
Usually people do not report an altitude close to 1000 feet as their first "team best". Usually the team will make progress in "steps" and will build several rocket designs "on their way" to that altitude which demonstrates the "team capability". You have not posted any successful flights "on your way" to 1000 feet. The design as described now (with the malfunction of the staging mechanism also has little chance of achieving the altitude you are reporting).

In case you did not know it, 1000 feet is difficult to achieve and only has been accomplished by a handful of teams. Your first flight reported is close to that. What you should do to "prove yourself" is to rebuild the rocket and fly it again and this time take lots of video and still photos. Then post the results to the forum.

Your "flight data" you posted looked like it was copied and pasted directly from one of the online simulators. Most people would not have bother to post the "thrust time" from a real flight (which the only way to get would be from a video or a simulator).

How is the weather where you live right now?


For the competitions we require 2 flights of the same rocket within a 2 hour time period to be eligible.


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Re: 1 stage to 944'

Post by Reptiglorandrockets » Sun Dec 15, 2013 8:02 pm

Water Rocket Expert wrote:The rocket fell off during flight at appogee but I did not relize my staging mechaism did not work and it had no pressure in it. They both went the same height. Why are you so suspicious of this launch? I told you the altimeter could have malfunctioned.
Don't take this the wrong way, I'm having a hard time believing your flight. How do you not realize that the rocket did not stage untill the last minuet? And a booster carrying the sustainer (second stage) to over 609'? I mean good knight, you should be able to tell if it was wrong? And above all, the FTC booster holding the sustainer? If you could post a video on your next try would help.


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 10:03 pm

WRA2 Administrator, I am new to the forum but am not new to water rocketry. I have been at this for several years now. I posted a personal best as designed by my friend kevin and I. I did paste the thrust imformation from a simulator because I thought they were reliable. This might be wrong.

Repliglorandrockets. As I said, the altimeter may be wrong. As stated the rocket hit the ground at highspeed. Also I have check this altimeter with a estes altimeter and they read differently by about 80' when the GPS said we were at about 500' above start point. The second stage valve did not let air to the second stage so it failed but did release.


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 10:05 pm

Right now I am building a 5 liter rocket from PET bottles. I have calculated it to achieve about 550'. I will pressurize it to 100 psi. Soon I will post the "work in progress".


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 10:06 pm

My people sure think I am a sketchy troll just because I claim a launch without much data. Besides the altimeter was not a logging on so think why don't they allow these for competitons? Duh. this is recreational. This is a personal best.


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 10:08 pm

WRA2 wrote:
Water Rocket Expert wrote:The rocket fell off during flight at appogee but I did not relize my staging mechaism did not work and it had no pressure in it. They both went the same height. Why are you so suspicious of this launch? I told you the altimeter could have malfunctioned.
Usually people do not report an altitude close to 1000 feet as their first "team best". Usually the team will make progress in "steps" and will build several rocket designs "on their way" to that altitude which demonstrates the "team capability". You have not posted any successful flights "on your way" to 1000 feet. The design as described now (with the malfunction of the staging mechanism also has little chance of achieving the altitude you are reporting).

In case you did not know it, 1000 feet is difficult to achieve and only has been accomplished by a handful of teams. Your first flight reported is close to that. What you should do to "prove yourself" is to rebuild the rocket and fly it again and this time take lots of video and still photos. Then post the results to the forum.

Your "flight data" you posted looked like it was copied and pasted directly from one of the online simulators. Most people would not have bother to post the "thrust time" from a real flight (which the only way to get would be from a video or a simulator).

How is the weather where you live right now?


For the competitions we require 2 flights of the same rocket within a 2 hour time period to be eligible.



I live in Maryland. It is cold and snowy. But even so moist air comes through now and then. Like when I launch!


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Re: 1 stage to 944'

Post by Water Rocket Expert » Sun Dec 15, 2013 10:10 pm

Reptiglorandrockets wrote:
Water Rocket Expert wrote:The rocket fell off during flight at appogee but I did not relize my staging mechaism did not work and it had no pressure in it. They both went the same height. Why are you so suspicious of this launch? I told you the altimeter could have malfunctioned.
Don't take this the wrong way, I'm having a hard time believing your flight. How do you not realize that the rocket did not stage untill the last minuet? And a booster carrying the sustainer (second stage) to over 609'? I mean good knight, you should be able to tell if it was wrong? And above all, the FTC booster holding the sustainer? If you could post a video on your next try would help.
Atually I have posted 421' and 556' on different parts of this forum like the general forum and then like maybe the splicing or something.


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Re: 1 stage to 944'

Post by Reptiglorandrockets » Sun Dec 15, 2013 10:24 pm

Water Rocket Expert wrote:WRA2 Administrator, I am new to the forum but am not new to water rocketry. I have been at this for several years now. I posted a personal best as designed by my friend kevin and I. I did paste the thrust imformation from a simulator because I thought they were reliable. This might be wrong.

Repliglorandrockets. As I said, the altimeter may be wrong. As stated the rocket hit the ground at highspeed. Also I have check this altimeter with a estes altimeter and they read differently by about 80' when the GPS said we were at about 500' above start point. The second stage valve did not let air to the second stage so it failed but did release.
Can you answer my question? How are you preventing the FTC booster from bending at launch? Some kind of reinforcement?


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