Water Rocket with Boosters - Axion G2

In preparation for flying the Polaron G2 rocket we flew the smaller Axion G2 a couple of times at NSWRA's new HPR launch site.
For more information please visit:
www.AirCommandR...

[@taofledermaus]

For the second launch to be a "failure" it turned out pretty well! That was really fun to watch.

[@CustomcrowdMitroc]

+TAOFLEDERMAUS nice meme

[@victorgalvez927]

Im a big fan of your channel...!!!!

[@tootk90]

I really love your channel. Now I'm wondering if you can manage to test this big "slug" lol

[@jhayrgarcia8253]

@@tootk90 im thinking the same thing!..😂

[@pratwurschtgulasch6662]

i'm a fan too. i always love the mercury and pachinko balls in syrup, so soothing i can fall asleep to that over and over :D

[@VulpisFoxfire]

Nice performance...it's amazing how close water rockets get to the range of usual solid-fuel models.

[@rickgauger2895]

Years ago, when these plastic bottles first appeared, I wondered if you could make a water rocket with them. You fellows have answered that question for all time. Great video.

[@jeffkrutsinger2903]

Thank you for taking the time to document and share your hobby with the ret of the world.

[@AirCommandRockets]

Cheers Jeff :)

[@dcairns61]

Amazing, I had not idea water rockets could be developed to that degree! Great work!

[@MilanKarakas]

I don't know what is more exciting to watch - the altitude reached, or the beauty of parachute opening. Keep good job!

[@AirCommandRockets]

Cheers +Wild Maniac :)

[@Matlockization]

I have never seen such expert organisation in all levels of your rocket project. Very impressed.

[@AirCommandRockets]

Cheers :)

[@Warriorking.1963]

I'm not a rocket scientist, that's my excuse and I'm sticking to it. I never knew you could build multi-stage water rockets, and even though you claim both launches were not without their problems, to me that was SERIOUSLY impressive!

[@AirCommandRockets]

Cheers :)

[@OP_opal]

It shined short but very *beautiful...*

[@bubblezovlove7213]

I used to make the easy version of this as a kid. I can hardly believe you actually have discarding fuel tanks?! That's brilliant!!

[@shonaoneill5151]

Well done George, incredible.

[@harshtsingh6963]

I am big fan of your channel sir. ( Love from *INDIA* ) and I want to become a scientist , my age - 14.. Thanks..

[@fast_and_curious9144]

Seeing U have Acces To KZbin at 14 U could gain More Of It, Till you Get To study Ur Bachelor's

[@nicparker3809]

That was really amazing, Super fast and well built. Water is so cool. I been floating steam around not sure how safe it would be. H2o is so magical..

[@AirCommandRockets]

Steam is definitely a little more tricky and also a little bit more dangerous, though it can have better performance. Hot steam around kids is only slightly more dangerous then a fully pressurised rocket. :)

[@spieltmit]

You have to make them land again (without parachute) ^^- just jokin - well done!

[@latifajagdal6127]

لرابوا

[@vuthap99]

Water Rocket That have strong power.

[@Raberuji]

"one day you'll hit the dome" said a flat-eather somewhere when he watched this... even if he was finding this way to cool to say it. Nice video, bring back childhood memories with a booster pack xD

[@AmIonArock]

Nice video's very good narration. I wish you luck. May I ask, At the end of this journey, what is the prize? other than it seems to be something that the whole family is enjoying. why not something burns why water. ? is it because of safety issues.

[@AirCommandRockets]

+AmIonArock Thanks, ... there is an end to this Journey? :) The prize is getting out with the kids and away from their computers and iPods, and learning a little about science and engineering. We do fly both pyro rockets as well as water rockets. Water rockets are a lot cheaper per launch though. ;)

[@kevinswithenbank2614]

Outdoors in good weather with the kids and no iPod. mobile phone. internet. and science. This is the best thing on the planet. Or off the planet. Top man.. Great to see someone doing something. Kill TV .

[@Macy_Freya]

I like the different colored booster propellants :)

[@QuarktaschemitSenf]

Very impressive Job! Could you please explain me some things i haven't understood yet? The boosters will seperate from the main rocket because they dont applie force upwards anymore and the way they are attached to the main stage. (will slide downwards) What i really dont get yet ist this: How were you able to launch the mainstage controlled after the boosters? Is this also solved mechanically somehow?

[@AirCommandRockets]

Here is how the boosters work: www.aircommandrockets.com/howitworks_1.htm#DropAwayBoosters the launcher is electronic and the timing is adjusted so that the main stage releases slightly after the boosters. Here is a video where we adjust the timing: kzbin.info/www/bejne/o3bLoYiNrqyNotE

[@ti994apc]

Well thought out. Good job.

[@pnachtwey]

There is a lot of rocket science even with the pressurized water rockets. I do a lot of simulations involving differential equations. I wonder what these guys did.

[@AirCommandRockets]

We use simulators that use differential equations.

[@2150dalek]

Very impressive engineering. Great launch.

[@supriyonovpfisinfo8538]

Truly extraordinary

[@jester17282]

Very well guys, All successful launches in my eyes.

[@bertkraan2817]

great, sustainable rocketry! no polution, less noise, fast reusable boosters, no dangerous chemicals/heat/burning stuff. Cool!

[@davec.6456]

Someone do the math, please. How many of these boosters would it take to launch the space shuttle?

[@calvinthedestroyer]

I can watch these launches all day :)

[@Hongqie]

i really appreciates the great efforts you guys put into this short excitement though personally i will not feel any fun at all by doing this kind of stuff.

[@jamieclay007]

Beautiful work - do you find the boosters offer any lifting advantage? How high will it go without the boosters?

[@AirCommandRockets]

+Jamie Clay Yes they do. They add around 40% more altitude to the main stage.

[@jsbrocketry1728]

Hello Air Command, nicely composed video as always. I like the fact that you talk us through the mechanisms and how the rocket works. Its simple, clever devices that really do the trick. The launch was AWESOME! If this is just the small one I can't wait to see how high the Polaron goes! Interesting though, how high the Axion G5 went with a 9mm nozzle at a high pressure.

[@AirCommandRockets]

Thanks Jamie. We too are keen to see how the Polaron G2 will fly, although it is not being built for altitude. It is being built for a long duration burn. The boosters are needed to get it up to speed as the small nozzle would not get it off the ground with sufficient speed. We're happy with how the Axion G5 performed, and it should be possible to push that performance a little further when launched at 250psi. We'll have to wait until next time to try again.

[@janbobis]

didn't know that there really are water rocket scientists! Anyhow, neat job you got back there! Wish i could also create mine and would be very happy if it reach 100ft.

[@fjon4060]

All this from water. Way too cool!

[@pratwurschtgulasch6662]

i would say you are on par with blue orgin

[@wasderrocketswasserraketen8025]

Nice first launch! And the second one wasn't too bad... :D! Greetings from Germany!

[@bugwubber]

Wow the lighter weight rocket sure gets off that launch pad in a hurry. Might be easier to sync the larger rocket since it will launch slower. I've found even with a mechanical linkage release (steel bar), multiple rockets will not launch together unless everything is exactly the same-weight water, nozzle, release mechanism, friction on the launch tube etc. So much so, I'd say any leak on the boosters should be cause to abort. Good luck, that is one impressive rocket.

[@AirCommandRockets]

Thanks bugwubber. It always surprises me too how quickly it does get going. At lift-off the rocket with the water weighs ~11kg (24lbs). The final rocket will be over 20Kg. The sync issue was due to us just trying to release the sustainer as close to the boosters as possible. On earlier flights with the launcher and normal pressure rocket we had a longer delay and there were no problems. The timing worked okay on this first launch but there is a little variance between launches I guess so we'll just delay the sustainer perhaps another 5ms, and should be all good. On the big rocket launch we'll make sure all leaks are eliminated before launch. One of the reasons we are trying with a smaller rocket first. :)

[@Starcruiser81]

Beautiful.... concept, design, function, very well done, wish I could play with such things >)

[@_xzvf2557]

Really nice rocket. Good job! In the future please build a rocket with large boosters, that have fuel-crossfeed, so when thoose burn out, the sustainer stage is still full. I know that, that's hard, but please try it at least. Or a three stage rocket.

[@AirCommandRockets]

Thanks Peter. This rocket we are building (Polaron G2) is specifically designed for a long burn rather than to go as high as possible. Because we are using a small nozzle, the rocket doesn't have enough thrust to get off the pad fast enough, and hence the need for boosters to get it up to speed. Static tests of the Polaron G2 rocket have given us burn times of over 10 seconds. "In the future please build a rocket with large boosters, that have fuel-crossfeed, so when thoose burn out, the sustainer stage is still full." Something like this? :) : 2-Stage Water Rocket to 864 feet - A project from several years ago.

[@_xzvf2557]

No, I mean that there is a pipe or something that drains the fuel from the booster and use it in the sustainer, so that the sustainer is still fully fueled when the boosters detatch.Such systems are used in real(space) rockets,that have liquid fuelled boosters(hydogen,oxigen). And please build another high preassure rocket.

[@AirCommandRockets]

Peter Simon Bohner Interesting, I wasn't aware there was such a configuration. Do you have a link, or an example of the rocket that uses this system?

[@_xzvf2557]

The soyuz rocket (1st stage) used that or the space shuttle(the main shuttle drains first the fuel from the big orange tank) or the delta IV rocket

[@AirCommandRockets]

Peter Simon Bohner But the shuttle external tank is not a booster, it is essentially just like a drop tank on military aircraft. With the Soyuz, I wasn't aware that there was any transfer fuel/oxidizer between the liquid boosters and the main stage. With the Delta IV I assume you are referring to the Delta IV Heavy as that has liquid fuel boosters? I also wasn't aware that there was any transfer of fuel/oxidizer between the cores. Am I understanding correctly the configuration you mean?

[@Y13A]

Ingenious mechanism and design.. :)

[@Whatdyoumean]

I dont know how you mad the stages sepreate but very cool, adn seams to work very well.!!

[@AirCommandRockets]

www.aircommandrockets.com/howitworks_1.htm#DropAwayBoosters

[@earlmorris8452]

I loved your video , I am a middle school math teacher in the state of Florida and I would like to construct a rocket very much like your own. do you have plans to construct a launcher and the rockets where i can convince my school district to purchase? It would be very appreciated. Again Thank you for the video on KZbin.

[@AirCommandRockets]

Sorry don't have specific plans for any of our rockets or launchers. They are always evolving and changing.

[@laimo87]

Soooooo Amazing! Nice job!!!

[@Norman92151]

I wonder how much useful thrust those boosters add. Granted they look cool parachuting back but perhaps lengthening the central core would give better efficiency due to the light weight of the "fuel tank"/rocket skin and the associated reduction in complexity would eliminate leakage and potential failure points.

[@AirCommandRockets]

They add about 30% to the overall altitude when compared to the sustainer alone.

[@11moonshot]

What a beautiful hobby!!

[@TheReaverOfDarkness]

I love how on the second launch, the first stage just goes completely haywire but the second stage makes a full recovery and continues its mission. Very KSP!

[@angel621100]

Congratulations George ... Oops tremendous force in the last release was the parachute that broke off ?

[@AirCommandRockets]

Thanks Jairo, No the parachutes stayed attached to all boosters and the sustainer. One of the boosters broke off a fin on the sustainer as it released. The fin was the only damage, which is easy to glue back on.

[@charcoal386]

What a great hobby

[@WSCEngineering]

How much of this technology did you get from the AWARS from back in the 1990. Pretty impressive.

[@AirCommandRockets]

AWARS?

[@Basrockets]

Very nice video and some good test to see where you can improve, i can not wait when you launch the complete G2! But the booster have a own locking system on the launcher why would you made those steel rings if there is no fore on that section? Because the booster are held in place by the launcher it self.

[@AirCommandRockets]

Thank you Basrockets. :) That's a good question why we need the strong connection on the boosters when they are held by the launcher. The individual booster retaining mechanisms are there for safety. They reduce the stress on the central nozzle while filling the rocket. If the central nozzle failed while the rocket is only partially filled that may be worse than if it failed at full pressure. However, with the boosters being released slightly before the main stage, the full static force is then transferred through the retaining mechanism for a few milliseconds before the main stage is released. When it leaves the pad the peak thrust is actually higher than the static force (I think in the order of 550N peak per booster), although at that time the main stage is also producing thrust (~180N peak) which partially cancels this force on the retaining mechanism. We also wanted to incorporate a safety margin in the strength of the connections. We tried thin aluminium sheet for the pins and loops, but they were too susceptible to bending.

[@HANDBALLDIEHARD]

Looks like flying soda bottles ! Maybe paint those boosters up as your Favorite soda! Just for fun ? LOL

[@maruivanrico2996]

+HANDBALLDIEHARD uhh it IS made from coke bottles, and then wrapped with fiberglass.

[@LoveNature153]

Good job

[@rstaff3]

Very impressive, as always!

[@AirCommandRockets]

Thank you Dick:) Had lots of fun flying this one, even if the 2nd flight was sub-optimal.

[@ftswarbill]

Failure or not it was a good watch. Cheers.

[@guntherultraboltnovacrunch5248]

Are there laws in Australia that prohibit flying those anywhere? Seems you guys always drive crazy distances to a "launch" site of some sort.

[@AirCommandRockets]

+Gunther Ultrabolt Novacrunch Yes there are. If you are flying below 400' then you can pretty much launch anywhere. Anything higher and you need permission. We mostly fly with the NSW Rocketry Association at our approved launch sites where we have permission from: CASA (Air Services), Insurance, land owners and council. Because a lot of the members fly rockets to significant altitudes we have to do that away from built up areas and as a result you end up having to travel further. We bring our bigger rockets to these locations, and smaller rockets to our Sydney launch site.

[@guntherultraboltnovacrunch5248]

Thanks for answering!

[@ShizzakGamer]

this CarolinaWaterRockets and i must say even though you had a pretty big mishap with the 2nd launch aswell as a fin breaking off, the rocket didn't seem to care it was missing one

[@AirCommandRockets]

Yup, that was surprising. The rocket is over stable so the extra missing fin didn't bother it that much. What was interesting though with the fin gone, the rocket had an rotation behaviour that was starting and stopping.

[@BrightBlueJim]

Wait. You're in Australia. People keep telling me that only the U.S., Liberia, and Myanmar use "U.S. customary" units. Yet you measure your pressure in PSI.

[@AirCommandRockets]

Yeah, its a funny thing. In water rockets we measure altitude in feet, weight in grams, nozzle size in mm, pressure in psi. I think its mainly because the magnitude of the units are easier to deal with. Converting back and forth during calculations is annoying. :)

[@teamlucrockets]

The construction of the launcher and rocket seems to be verry good. Do you think that he's going to have a height above 300 meters? I have a little suspicion that this is going to happen. What a great launchsite with great space. Meanwhile I've launched Antares 3 B again and I've had the seem problem . LEAKS!!! These are fixed and ready for a next attempt as you will certainly do. The GoPro hero is still making nice shots. All well done.

[@AirCommandRockets]

Hi teamlucrockets, I think once the rocket is flying properly, and at the designed 250psi pressure we should get over the 300m mark. The final large rocket will be interesting as it will have a small nozzle, but we are trying to get a long burn out of the rocket rather than have it go to a high altitude. We prefer the long slow burns. The new launch site is great, we are looking forward to trying some other projects we are working on there. :) Best of luck with the next Antares 3B flight. I'm looking forward to the video. :)

[@craigcowley7560]

Great stuffI guess we are looking at a green rocket. LOLKeep up the good work

[@youtubespeedruns4784]

Great analysis!

[@eromadroleromadrol5171]

Congrats ! Keep on rockettin' !

[@pschroeter1]

Rocketry, where failures are just as fun to watch as successes.

[@ankurage]

pschroeter1 And neither are cheap as well.

[@lolwtnick4362]

right? like when the challenger exploded

[@24Medddia]

Unless your nasa

[@Reckone12]

This is so cool! Well done!

[@AirCommandRockets]

Cheers :)

[@HadidHasanHemel]

The background music is so good..can anyone mention the original soundtrack?

[@wingmanalive]

You drove 6 hours to shoot off water rockets? That's commitment!

[@spnwaterrockets8473]

Hi George congrats to all the team for these great launches….I was wondering why do you put the fligthcamera facing downwards?Is it because it gives a better notion of distance and speed of the flight? Becouse personally i find that facing the camera sideways is faaaar more beautifull at least the view is. Also i wanted to thank you guys for the amazing tutorials, since I'm finishing my 2 stage rocket =D and I'm getting MUCH MORE professional and perfectionist thanks to you guys and raketfued….Keep up the amazing work and btw as I've written high gloss paint paints the rocket perfectly and id doesn't flake off, although it takes 3-5 days to dry depending on your climate. AMAZING VID Congrats from India!!! ;D Shiva

[@AirCommandRockets]

Thank you Shiva. :) Great question about why we point the camera downwards. There are a few reasons. We find there are more interesting things to look at on the ground than up in the air. Also if the rocket is spinning on the way up looking sideways gives you a more smeared video. The other reason is that we attach the parachute cord so the rocket falls sideways so on the way down the camera can film the horizon or essentially the "sideways" shot. I think the ideal view would be mostly down with perhaps the horizon at the top of the frame, a lot easier to do with wide angle lenses. But having said that, I'm all for multiple camera angles. Also thanks for the paint tip. I have replied to your other post.

[@kgill99]

great stuff guys! one funny bit tho-'launch site'=a random field!

[@AirCommandRockets]

Cheers. :) Actually it is a proper launch site. It took the club close to a year to get the paperwork done to be able to launch at this site. You need to get permission from the council, land owner, fire brigade, CASA (air services), and the insurance company.

[@lebommjohnson8101]

That pounding, penetrating bass background is just too much ! ! Ditch it !

[@Axgoodofdunemaul]

Thanks for doing this. I've wondered for years if plastic soda bottles could be inflated to high pressures to make powerful water rockets. I'm sure you know this already, but a typical soda bottle inflated to 100psi will explode like a bomb if it gets the slightest puncture, so be careful. My own research isn't as constructive as yours -- I was trying to make a fireless super-firecracker!

[@jucknorreyne]

great video guys - are you using a kit or is it all home made

[@AirCommandRockets]

Jucknor Reyne All home made. :)

[@Shastavalleyoutdoorsman]

That is just awesome.

[@김태우-e5q]

와아익 페이커!

[@cpoky]

"From failing you learn. From success, not so much." Great work

[@RaketfuedrocketsDeutschland]

Wow, that's a really well made video. Especially the combination of background music and the video files is great! It seems like the Axion G2 performs very well, I'm sure you can fix the problems at the second flight. :) I really like the parachute mechanism for the boosters, it looks very easy and reliable. We will use a similar mechanism at our Swallow 2 rocket, thank you for the great idea. Can't wait to see the flight of the Polaron G2. :) Cheers Julian from Raketfued PS: If you are interested, I would make a nice little video/trailer for you and your rockets. I'm so thrilled of your rockets and your videos, it would be a pleasure to do something like that. Just say if you're interested, and choose a nice piece of (free to use) music.

[@AirCommandRockets]

Thank you Julian. We were happy with how the Axion rocket performed in these tests. The couple of small issues are easy to fix, with just a new washer and slight adjustment to the timing. We are taking small steps with the launcher and rocket as we want to see how each of the systems behaves before flying the big rocket. The rocket and launcher are designed for 250psi, but the big rocket will first be launched at 200psi, and then if the flight is successful we'll try again at 220psi and then at 250psi. At the higher pressures there is a much greater risk of something breaking so we want to at least get a couple of flights in first. Re videos, I'll send you a PM. :)

[@RaketfuedrocketsDeutschland]

AirCommandRockets Alright, thank you for the information. Have you ever considered about painting your rockets? It would look absolutely awesome. Cheers

[@AirCommandRockets]

RaketfuedRockets We haven't had a lot of luck with painting PET bottles because the paint seems to flake off after several pressure cycles. We've tried vinyl paint which is stretchy, but expensive. The other reason is that we use a lot of tape on the outside of the rockets to hold things on, and when we remove it the paint can peel. When building rockets like the Shadow with a nice finish, then yes we paint them. :)

[@spnwaterrockets8473]

AirCommandRockets George about the paint i had the same problem…. what i found out is that high gloss paint does the job after some 20 launches it stills hold pressure perfectly

[@AirCommandRockets]

SPN WaterRockets Good to know, thanks for the information, we may have to give that a try. Do you know how well it holds out against applying and removing sticky tape/electrical tape?

[@AirCommandRockets]

@badley wrong : Thanks, yeah it was sad to see Antares disassemble like that today.

[@nathantrigg5399]

l got a long way to go yet, still on single stages. Keep up the good work, you have to commercialize all your good work.

[@AdilsonPinheiro7339]

Amazing. Very good indeed.

[@maruivanrico2996]

Just what was that whistling after the mainstage burnout?

[@Spoif]

AirCommandRockets Would there be any benefit of connecting the boosters together (in the same arrangement that you have them) so they share the same liquid and gas pressure, as well as release together ?

[@AirCommandRockets]

This is something we considered early on in the design, but for that you need high pressure linkages between the boosters. The problem then is that they are permanent and it makes it difficult to separate from the rocket without the fins getting caught up on the linkages. You could have detachable linkages but that adds weight and complexity. In the end we just went with the launcher manifold doing the pressure equalization between the boosters. There is a tube inside each nozzle that emerges above the water level in each booster that allows the pressure to equalize without transferring any of the water. Here are more details: www.aircommandrockets.com/howitworks_1.htm#DropAwayBoosters For the higher pressure launches the stress on the central nozzle is too high to hold the main stage and boosters like described above. So for this reason we have a new launcher that holds everything individually. G2 Cluster Launcher Tests but we still use the pressure equalizing manifold.

[@ckdigitaltheqof6th210]

Prsssure burst is greater then flame, flame consumes an atmosphere rappitly to be exploited as momentum in say, a cone, although pressure burst can get out of control or over exirt. If you could manage to covert density level of fuel, say from multi mix or single solid to liquid to gas phase chambers, eventually reaching a pressure unit, it would save thrust duriation time, before the final chamber/booster to exirt. While separation of fatal high combo fossils, to link only during thrust chamber areas.

[@davidxiao9175]

For the Axion G2?

[@franciscoosuna259]

nice roll of the main stage after boost stages drop

[@jackas5658]

This is Amazing

[@Sparky-Tim]

You guys are amazing!

[@jonathantamayo242]

Hola podrías explicarme el paso a paso para hacer uno tengo un proyecto de física para la universidad y quiero lograr tus mismos resultados y luego explicarlos saludos desde ECUDOR

[@andrelindolfo4111]

Hi, what was the second stage drive mechanism you used? Was it electronic or mechanical?

[@AirCommandRockets]

Hi, this is not a 2 stage rocket, but a main stage with boosters. This means that the main stage fires at the same time as the boosters on launch, rather than firing when it is already in the air like a normal 2 stage rocket. Having said that the release on the launch pad is electronic. The main stage is released just slightly later than the boosters so that the boosters remain connected to the main stage. When the booster stops producing thrust it falls away by itself.

[@heyimamaker]

Really cool! What do you use to launch the rockets?

[@AirCommandRockets]

In terms of the launcher, or how we pressurise them?

[@heyimamaker]

Just the launcher, I was curious how something holds the pressure in but can release it so easily.

[@AirCommandRockets]

Here are some details: kzbin.info/www/bejne/o3bLoYiNrqyNotE kzbin.info/www/bejne/gnelXnaKn759ja8

[@Tonythemann5150]

I appreciate your videos and can tell theres alot of hard work in them. i am in the USA. one thing that drives me nuts with most people in the UK, even my Buddy in Westchester, you guys say "A L U M I N I U M" (AL-LOO-MIN-YUM) however here in the USA its "A L U M I N U M" (AL-LOO-MIN-UM). Even my spell check on my phone has both spellings. do you know if it was changed by Europeans? or did America change it. i could look it up but want to hear the answer straight from the source. Awesome rocket BTW!!!

[@AirCommandRockets]

Short answer: I don't know. There are plenty of other words that have different spelling in the US.

[@ThirdDegreeWitchExplores]

Blimey , impressive !!!!!!!

[@richardt.dobrowolski7850]

what would happen if you used carbonated water?

[@AirCommandRockets]

+richard t. Dobrowolski Not sure, but it would be worth testing.

[@AirCommandRockets]

+pleindespoir Then you would have to go to the naughty corner.

[@evanogburn]

+pleindespoir It wouldn't ignite unless they had a heat source

[@CSJiGSaW08]

Its a bottle rocket with water, not October Sky movie... Why would you drive 6 HOURS!!!!! WOW

[@AirCommandRockets]

What do you mean? 6 hours is just a drive around the corner here. :)

[@seanb3516]

A total blast! How fun is amateur engineering, right?

[@mandolinic]

This is impressive stuff.

[@AwesomeWoodThings]

That's amazeballs! Wow!

[@McRocket]

Pretty cool stuff.

[@richardhawkes]

You drove two hours to a field?!

[@AirCommandRockets]

+Richard Hawkes No, this launch site is ~5 hours from home. :)

[@richardhawkes]

AirCommandRockets LOL, that's OK then! Nice launch though.

[@alexanderx33]

Is it just me or does that seem like obsurd overkill for a non-flamable rocket made of plastic. I would have just walked to a local park or empty lot, anything with a radius above 450 feet on a day with mild wind.

[@Schmidtelpunkt]

Well, think of a worst case scenario: the rocket immediatly going sideways, maybe one of the boosters getting jammed and opening after impact and then hitting someone on the head sideways while still half full. Or worse: hitting a car, scaring the driver and make him evade the obstacle hitting a person as a result.... The fact that the risk of something like that happening could be reduced to 0 simply by finding a more suited location makes it impossible to see it as an accident afterwards.

[@alexanderx33]

Herr Schmidt Yeah but you gotta weigh the risk by multiplying it by the probability of occurance, I dont expect you to do the math but its just something to consider, and often will lead you to take larger risks rather than go to greater lengtjs to avoid them. Just a logical way of balancing things for the best average result.

[@garundip.mcgrundy8311]

What the hell is Al-lu-min-i-um? Where I come from we just call it "Pepsi bottles." One might get them at any grocery store. FYI. Also, did it achieve LEO (Low Earth Orbit)?

[@maruivanrico2996]

He meant the braces tho. LOL

[@cfeigel]

If you can't get Aluminium where you live, just try some Aluminum - - it's almost as good.

[@victorgalvez927]

So how long will take to bring my Rc-model roadster to mars...?

[@spnwaterrockets8473]

Hi George! sorry to bother ou guys again but i found that the glue that my friend was using is synthetic rubber glue?!!!! What do you guys make of it??? Well, as for what he told when the splice exploded only the bottle was damaged, not the splice....For me that seems promising.Any way im trying out by myself today ill give details about the result. I just wish to know what is your opinion?Do you think it might work? Did you ever tried? Thanks, Shiva =D

[@spnwaterrockets8473]

And lastly from where do you guys buy pl premium?

[@AirCommandRockets]

Hi Shiva, I don't have any experience with synthetic rubber glue, so I can't comment how effective it is. But if pressure tests have been done and it is holding up to the intended pressures, then it should be good to use. Does it get affected by moisture? We get our PL premium from the US. Every time we go over we bring some tubes back with us. People here have ordered it through their local hardware store as well. Perhaps you may be able to do the same?

[@RosssRoyce]

You guys should make gliders innitially propelled to altitude by water :D Great videos!

[@maruivanrico2996]

Follow up question: How fast do you think the main stage is traveling after reaching 500 feet? (speed of rocket @500-520ft)

[@yves-noel-mariegonnet1043]

Clean énergie! Bravo!