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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.

Cheezy Water Rocket Toy with Potential

Discussions about rockets, construction materials, adhesives, nozzles, nosecones and fin design.
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anoymous
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Re: Cheezy Water Rocket Toy with Potential

Post by anoymous » Tue Jun 16, 2015 3:20 pm

have you tested it already? Or are you still stuck with the parachute?


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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Tue Jun 16, 2015 10:31 pm

No it is ready to go. Aiming for Father's Day since we'll need some space and have to travel to a park.


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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Mon Jun 22, 2015 11:10 pm

Here is the new upperstage. The rocket has been named Paso Doble
IMG_20150622_215834.jpg
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Re: Cheezy Water Rocket Toy with Potential

Post by anoymous » Tue Jun 23, 2015 10:19 am

seems very nice!
It looks like a real rocket. ours looked more like a hotchpotch of pieces of junk and wasn't even straight. Only our parachutes looked good.


"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.

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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Wed Jun 24, 2015 9:09 am

anoymous wrote:seems very nice!
It looks like a real rocket. ours looked more like a hotchpotch of pieces of junk and wasn't even straight. Only our parachutes looked good.
Thanks! It is a fairly simple design, just 1 2liter for pressure, The cargo bay is a second 2l bottle inverted with the bottom cut off. It screws into a cap glued on the first. The nosecone is the nozzle end of a 3rd 2l and is removable for access to the cargo bay. Using the USWR radial deploy, the shroud is made out of a 3 liter bottle. Kinda big for a second stage but that's just to make a point. The fins are balsa and are shaped to an airfoil so that along with grinding the nosecone was what took the most work.


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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Fri Jun 26, 2015 11:28 pm

Some pictures of Paso Doble ready to launch.
It is modular so it can launch as single or multi stage.
20150626_203820.jpg
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20150626_205324.jpg
20150626_205642.jpg
20150626_205657.jpg
20150626_205708.jpg
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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Fri Jun 26, 2015 11:58 pm

Hey so does anyone have experience siming a two stage rocket? My best guess is 400-500ft at 100psi. Total dry weight is 600 grams. 2l upper 4l lower.


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Re: Cheezy Water Rocket Toy with Potential

Post by anoymous » Sat Jun 27, 2015 2:43 am

I can't help you here. I never got past the single bottle rockets (at least not yet)


"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.

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Re: Cheezy Water Rocket Toy with Potential

Post by anoymous » Sat Jun 27, 2015 2:45 am

sorry for the double post, I forgot to mention that the rocket looks very good. Isn't there a recovery system for the first stage?


"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.

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bugwubber
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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Sat Jun 27, 2015 10:28 am

anoymous wrote:sorry for the double post, I forgot to mention that the rocket looks very good. Isn't there a recovery system for the first stage?
Thanks! First stage is "tumble recovery" or if needed I'll add a streamer.


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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Sun Jun 28, 2015 9:56 pm

We have success!

And I have no idea where the upper stage is!

We had a false launch detect and then the alTImeter reported an error condition and wouldn't reset. So we launched with just the bare upper with no parachute, no beeping launchpad, and no blinking lights.
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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Mon Jun 29, 2015 1:04 am

Here's the slow motion. There one second, gone the next.

[youtube][/youtube]


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Re: Cheezy Water Rocket Toy with Potential

Post by anoymous » Tue Jun 30, 2015 7:33 am

Always look at the bright side of life: You can always make a new upper stage and you were lucky it didn't happen with the altimeter on board. you might have lost that too


"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.

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Re: Cheezy Water Rocket Toy with Potential

Post by bugwubber » Tue Jun 30, 2015 9:32 am

anoymous wrote:Always look at the bright side of life: You can always make a new upper stage and you were lucky it didn't happen with the altimeter on board. you might have lost that too
I should probably start writing my phone number on the rockets :-)

Onboard- HK altimeter with bluetooth dongle, 2 1s lipos.

Regardless of whether the upperstage is found, I'm happy because I just successfully launched my first two stage rocket, the airstart mechanism worked perfectly, and the glueless PVC coupling on one of the first stage bottles worked perfectly.

I suspect the alTImeter failure was due to low battery, so I will be checking on that.


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Re: Cheezy Water Rocket Toy with Potential

Post by anoymous » Tue Jun 30, 2015 11:17 am

How many launches have you used the battery? With us, after four or five launches the battery was low. We never had an error because of that, tough.


"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.

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