Water Rocket with 3 boosters

[gettingwarmer]

Thanks :)

[gettingwarmer]

I love your videos!! You're the best, and your rockets are amazing!!

I tried to make one of these but a few seconds after launch the rocket starts rolling over and over in mid air like its doing cartwheels. How should i stop this from happening? Less weight on the front? or a smaller nozzle?

Thanks in advance!!

[gk123434534]

@gettingwarmer Thanks. :) It sounds like the rocket is unstable. Try adding more nose weight, or putting the fins further back. If you go to our main website and look at the "Flying Straight" article it will give you more details.

[zapster2412111]

WOW those are awesome rockets that fly great,nice designs guys.

[gk123434534]

@zapster2412111 Thanks :)

[MrKareemMaleek]

This is Excellent...Just imagine if we could do this with the nasa shuttles...we would save so much money...the Economy would be great

[olderanddecrepit]

I noticed the onboard camera indicating a VERY straight and stable trajectory. Well done, mate!

[sirfokke]

this is realy awesome XD

[persona470]

How much?? did it Cost

[Zbaa12]

Excellent work

[andriusst]

this is soo cool!!!

[BarneySaysHi]

AWESOME!

[jmeverts1234]

Brilliant! Lol

[khidhal]

how to make?

[gig603]

AMAZING



[yopt3]

прикол! =)

[penrox1]

:) a way to see the outside world cool !!!!!! I wish I can fit into one and blast off and survive

[deve20]

nice video :)

what is this music?

[willielajay]

how do u attach parachutes to the boosters.

[gk123434534]

@willielajay The parachutes are held behind two door halves made of PET plastic. The two halves come together very much like a hinge, and the hinge-pin is just a piece of wire. This wire is attached to the main stage. When the booster starts falling back, the wire pulls out of the "hinge" and the doors are free to open and deploy the parachute.

[lonelyday91]

can u suggest whether the length of the pipe in the bottle should be at the same water level or more or less..

[gk123434534]

The water level in the boosters should be below the top of the tube.

[lonelyday91]

thanks.

[DarknesDeja]

10 m ROCET

[DarknesDeja]

why dont you build big rocket

[DarknesDeja]

tnh.I have made a rocket, but i did not pumped enough, so the rocket wont burst, because of that it flew very little, how much pressure can you apply for that 2l plastic bottle

[gk123434534]

The thin walled 2L bottles will burst at around 170psi, but will handle 120psi okay. Make sure the bottle is free of scratches and kinks though.

[DarknesDeja]

I need help for making rockets.how to make one to fly away by itself

[gk123434534]

If you go to our main website and go to the construction section, there are full instructions on how to build simple and more complex rockets.

[derTommy]

what the hell is photon II made of?

[gk123434534]

30mm polycarbonate tube used for protecting fluoro tubes.

[derTommy]

@gk123434534

and it's an water rocket, too? awsome

[eda777kradenaipe]

wow

[alonsoheras99]

pero como chingados lo asen eso es lo k yo kiero saber ya ise uno pero kiero saber como los conectan

[nahalitet11111111111]

THAT THING IS UNIQUE!!! 5+ and in favorites!!!

[heberorozco]

nice vid dude, how do you make the parachute to open when the rocket is going down?

[gk123434534]

Full details are available on our main website.

[TheSwindlz]

You have to buy this on-board computor!

[421250]

You use water pressure to launch it upwards?

[gk123434534]

Yes, compressed air above the water provides the pressure.

[punjabihero101]

What solution did you use to lift the rocket into the air. Was it just pure water?

[jobapi01]

no, water mixed with foam. The same kind of foam you have in a bath. For the boosters they use just water.

[gk123434534]

The boosters use normal water with a couple of drops of food colouring. The main stage uses normal water with around 2% kids bubble bath mixed in. The main stage uses Jet Foaming to produce foam as the rocket flies.

[sgtsn1per]

so how do i make an easy to make homemade 1 with easy things to find around home like drink bottle etc?

[gk123434534]

Our main website has full details on how to make water rockets and launchers, from simple to the more complex ones. Go to the construction section.

[CottenJet]

thk for answer..

[BigHairyTroll]

I don't agree with some comments I have read on your videos: though I usually do not listen to this kind of music (except maybe for Jean-Michel Jarre's "Oxygen") I got to like them all - maybe by association for watching your videos over, over and over again.

Day73 is the one I show my colleagues in the US to try and start a team there.

[CottenJet]

how you calculate cp and cg with booster?

[gk123434534]

First we calculate the CP and CG of the main stage and adjust accordingly to make sure it is stable during flight. The boosters themselves aren't designed for stability, so there was no need to calculate the CP and CG as far as the boosters are concerned. We did not do any overall main stage + booster CP & CG calcs. This was more or less trial and error with a calibrated eyeball.

[gk123434534]

The boosters are attached to the rocket for about 1 second so you only need to worry about stability of the entire rocket during that 1 second. On one of the early flights the entire rocket started pitching over at booster burn out, so then we tripled the fin area, and the whole rocket has been flying straight since.

[akoits]

sooooooooo coooooooooooooool!!!!

[Partisanenkrieg]

wow! cool, man!

[XXKidBeybladerXX]

i wonder if u went on it will it be powerful enough to life a kid

[gk123434534]

The Acceleron V booster could lob a kid about 4 meters into the air. :) .... yes we actually did the calculation.

[Tiger65767]

wow!!!

[Fallashe]

awesome video! i gotta build myself one of those! Good job!... oh and could anyone maybe tell me the name of the song?

[gk123434534]

At the very end of the video are the music details. The song is called "Mystery" by "erase.release". I work with one of the band members.

[Fallashe]

man they shouldnt have to "work". They're damn talented! eitherway thanks :) keep up the good work =)

[ALegendarySanninJiri]

is that a planet?

[skuula]

NICE!

Sorry abt the loss of the - was that a flight computer?

[gk123434534]

Hi Soren,

Yup that was a flight computer that got crunched. :( Luckily we can pull most of the parts off and put them on a new board so not an expensive loss. All part of the fun. :)

[DriveTech24]

From 1:02-1:13 is almost reminescent of zero gravity the way the water droplets appear to float around.

[Danielastronomo]

Hi George,

What type of camera did you put in this rocket?

[gk123434534]

Hi Daniel,

We used the FlyCamOne V2 in this rocket.

[gsxr1002]

That has to be one of the coolest things I have ever seen someone do. Thanks for the vids

[Danielastronomo]

Hi George,

The video is great, my favourite part is when the booster fly over the camera.

I am building the launcher for a water rocket with boosters and I must ask you something:

How the boosters parachutes work?

[gk123434534]

Hi Daniel,

The booster's parachute door latch is like a piano hinge. With the hinge pin being a wire attached to the main stage. When the booster drops away, the wire is pulled out of the 'hinge' and the door pops open and the parachute is deployed.

In some of the onboard footage you can see the wires dangling from the main stage.

It is a very simple lightweight system that has been working well for us. There is a wire for each booster.

[Ganonman2]

do you sell the robinson coupleings? because i dont have access to a lathe

[gk123434534]

Sorry we do not sell the couplings. You can, however, simply build the couplings as Bill Robinson originally made them using a hollow threaded lamp rod and a couple of washers and nuts. I can't post URL here, but if you go to our site and look under Robinson coupling there is a link to the original design.

[Ganonman2]

ok...thanks anyways

[jobapi01]

thanks i was looking for the same thing

[ebarnes419]

totally cool!

[nottie]

Wow great!!

[danratsnapnames]

has got to be the best example of water rockets i've ever seen. fantastic, and above all others, your music level and choice is the best. thank you so much for sharing this. :)

[justbe99]

nice one george. i made a 9l one but i didn't launched it... yet. i'l post a video when i'll do it.

[pachiakun]

Awesome!!

[itsgr82bl8]

Amazing machines, you have absolutely inspired me to start playing with water rockets!

[masterpaperaircrafts]

Amazing flights and machines! Awesome onboard views. Great video.

[benni1879]

he i´m from german and my english is not very god but how did you bould it that the booster rockets are fall down in the raght moment ?????

please answer fast

[gk123434534]

Hi there, If you go to our main website and look in the "how it works" section you will find full details of how the boosters separate.

[FrossardX]

whait music ?

[ZEROPOINT132]

Hi. Look out NASA.

I think NASA uses Pepsi bottles, I think they hold the most pressure.

Would be nice to hear some NASA radio talk to the astronaut's when in flight.

cheers.

[GoGreenHHOhybrid]

When I was a kid my mom & dad got me a little Water rocket toy I loved that toy.

Awesome job on your rockets!!!!!!

Thanks john...

[IceTrey77]

put 200 psi on it

[gk123434534]

200 would be fatal for the rocket without reinforcing. Anything more than 130 and this rocket starts stretching the bottles too much.

[skyastradriver]

10+ very good job

[Macka007]

i'm surprised the rocket elongates as much as it does and doesnt widen nearly as much as i expected it to, is that due to the joins or is it just a property of the bottle?

[gk123434534]

Per unit area the rocket stretches about the same in length and in width ( it is slightly different due to the PET polymer structure and direction of the polymers - the result of the manufacturing process. I think it stretches in a ratio of about 7:8) Because the rocket is much longer than wider the stretch is more obvious in the length.

[Macka007]

so it's mostly an accumulative effect due to the length?

[gk123434534]

that is correct :)

[berni8k]

You could try putting a accelerometer in to it also, i wonder how fast this accelerates at takeoff and how dose it keep going in the air.

[gk123434534]

Acceleration is in the 5-10G range depending on how much pressure we put in. It keeps going after the boosters separate because the main stage has about 5 times more volume, uses a smaller nozzle and also generates foam midflight. These three things combine to give the rocket about 7 seconds of thrust.

[DaanenPleunRockets]

Exelent flight! and superb onboard footage! keep up the good work!

Team.[D&P]Rockets

[gk123434534]

Thanks Daan. I've been following your work closely as well. You guys are doing great work, when will you be posting your next video?

[gk123434534]

Thanks Christian, Yeah the thin walled FTC was just to weak to stand up to the high Gs. Time for T-12 FTC and a bit of reinforcing to stop the flexing.

[TheJadeEmporer]

nice to see a new launch. hoping to do a launch tomorrow but i dont have the money for recording my flights.

the one i hope to launch tomorrow is 3 500ml bottles spliced neck to bottom. with a 4th as the nose cone with a side deploy chute and tomy timer. if all goes well i plan carrying the design to 2 liter bottles.

with a little luck i'll have some video shots early this summer to put up on here and wra2

[gk123434534]

Good luck with the launch tomorrow. Looking forward to the video. :)

[linuxdude1]

That was a very nice video! I always look forward to new videos from you. Your rockets are awe aspiring and fun to watch! Keep them coming!

[nerdboy19]

Ouch but last bit of the video... :'( not good :o im sorry to see your beautiful rockets smashing to the ground :/ ouch!

[nerdboy19]

That onboard video was probably one of the best you have made so far! :D very good job, nice and smooth :) and btw. 1:04 weightless foam xD lmao

[DMarc85]

awesome onboard footage! Very nice alignment you have.

[Andrewinadoghat]

The onboard camera video is really cool, especially when you can see the water droplets failing right next to the rocket

[Danielastronomo]

Very nice work  boys, the aceleration of this rocket is awesome. I love this video 5 stars!

[robojot]

lol im viewer no.1