Splicing bottles allows you to build bigger water rockets. This tutorial demonstrates how to splice 2L bottles. For more details see: www.AirCommandR...
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@YknotLearnall8 жыл бұрын
A quick thank you to and the Air Command Rockets site for the tutorial. The hot water dip to shrink the bottle evenly to make a slip joint a pretty slick idea. Again thank you. I always enjoy learning something new. - chase -
@AirCommandRockets8 жыл бұрын
Thanks but we can't take credit for that idea. That had been done for many years by water rocket pioneers. :)
@gk12343453413 жыл бұрын
@MrTomcarnahan I always use a thick nail that I insert into the cartridge nozzle. The diameter of the nail is slightly bigger than the hole I make in the nozzle, so that when you force it in it seals around the edges. You normally have to use pliers to remove it again, but the nail leaves a nice channel inside the nozzle for the PL to come out.
@dericcchen4010 жыл бұрын
wow. my friends were so impressed by the rocket. thanks for the splicing tutorial! it helped me a lot.
@gk12343453412 жыл бұрын
Generally it's only been available in the US. Most hardware stores carry it there. Have you tried looking on-line to see if they will deliver it? If you can't get a hold of PL, try looking for any other Polyurethane based glue as these are the best glues to use on PET. But you would need to test the strength yourself.
@007-Bond5 жыл бұрын
Very professional filming and explaining. Awesome video.
@Dontcopit10 жыл бұрын
Force is measured in Newtons. Pressure is measured in the following: mm Hg (Millimetres of Mercury), in Hg (inches of Mercury), PSI, Bars, and Pascals/Kilo Pascals.....not sure of any more. In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or a flexible object to deform, or both. Force can also be described by intuitive concepts such as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F. The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time. If the mass of the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object. As a formula, this is expressed as: F=ma (Remember it is a vector as stated below, hence direction must follow the value) where the arrows imply a vector quantity possessing both magnitude and direction. Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object. In an extended body, each part usually applies forces on the adjacent parts; the distribution of such forces through the body is the so-called mechanical stress. Pressure is a simple type of stress. Stress usually causes deformation of solid materials, or flow in fluids. The SI unit of force is the newton (symbol N), which is the force required to accelerate a one kilogram mass at a rate of one meter per second squared, or kg·m·s−2.[46] The corresponding CGS unit is the dyne, the force required to accelerate a one gram mass by one centimeter per second squared, or g·cm·s−2. A newton is thus equal to 100,000 dynes. The gravitational foot-pound-second English unit of force is the pound-force (lbf), defined as the force exerted by gravity on a pound-mass in the standard gravitational field of 9.80665 m·s−2.[46] The pound-force provides an alternative unit of mass: one slug is the mass that will accelerate by one foot per second squared when acted on by one pound-force.[46] An alternative unit of force in a different foot-pound-second system, the absolute fps system, is the poundal, defined as the force required to accelerate a one pound mass at a rate of one foot per second squared.[46] The units of slug and poundal are designed to avoid a constant of proportionality in Newton's Second Law. The pound-force has a metric counterpart, less commonly used than the newton: the kilogram-force (kgf) (sometimes kilopond), is the force exerted by standard gravity on one kilogram of mass.[46] The kilogram-force leads to an alternate, but rarely used unit of mass: the metric slug (sometimes mug or hyl) is that mass which accelerates at 1 m·s−2 when subjected to a force of 1 kgf. The kilogram-force is not a part of the modern SI system, and is generally deprecated; however it still sees use for some purposes as expressing jet thrust, bicycle spoke tension, torque wrench settings and engine output torque. Other arcane units of force include the sthène which is equivalent to 1000 N and the kip which is equivalent to 1000 lbf. Pressure (symbol: P or p) is the ratio of force to the area over which that force is distributed. Pressure is force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure (also spelled gage pressure)[a] is the pressure relative to the local atmospheric or ambient pressure. Pressure is measured in any unit of force divided by any unit of area. The SI unit of pressure is the newton per square metre, which is called the pascal (Pa) after the seventeenth-century philosopher and scientist Blaise Pascal. A pressure of 1 Pa is small; it approximately equals the pressure exerted by a dollar bill resting flat on a table. Everyday pressures are often stated in kilopascals (1 kPa = 1000 Pa).
@rms5911 жыл бұрын
This was a well done and informative video and I want to say thanks for that. I will be building my first rocket using this method.
@CocoAlvarezsantyjuan10 жыл бұрын
muy buenos sus tutoriales. Nos gustaría saber como se llama el pegamento o adhesivo que usa para pegar las botellas.Le agradeceríamos que nos contestara.Saludos desde Rio Negro Patagonia Argentina.
@mateocontenla59169 жыл бұрын
El adhesivo que utilizan se llama PL Premium fabricado actualmente por Loctite
@gk12343453411 жыл бұрын
It helps to strengthen the edge as well as making the bottle nice and round at the cut. Without the curl you'll find that the cut bottle is a little wavy and uneven. The rounded shape also helps with forcing the glue into the join as you press the two halves together.
@christl30112 жыл бұрын
Wow that was really cool, I wouldn't be surprised if this guy helped build the Space Shuttle.
@gk12343453412 жыл бұрын
Yes you can. We found that because the PL bubbles when it cures and becomes a little porous. We've had a few leaks with the 2L bottles when using PL premium only and so we started using the sikaflex as a sealant and haven't had a single leak since then. Even though the PL leaked it always held the splice together.
@gk12343453412 жыл бұрын
Hi, We use both commercial tornado tubes bought from CoolThings Australia (can't post link here) and ones we make ourselves from 3/4" BSP irrigation connectors. The BSP ones are used on the higher pressure rockets, and the commercial ones on the lower pressure rockets.
@PaulGreggBYRC5 жыл бұрын
I'm wondering if acetone wipe, then wipe off in one direction with dry cloth might be a better surface preparation than sanding. Adhesive bonds are chemical, not mechanical, bonds. The surfaces must be free of oil or any other contaminant, to avoid weak layers in the bond. I'm not sure the surface needs to be rough as much as it needs to be clean. I know in aerospace bonding, sanding is seen as more operator-dependent than acetone wipe, because different people will sand differently. I also think it's recommended you solvent clean after sanding. But whatever works, I guess.
@gk1234345345 жыл бұрын
I believe sanding to some extent also cleans the surface exposing fresh materia underneath. I'd imagine it also creates a greater surface area for the glue to bond with. We only sandy it fairly lightly as we don't want to weaken the plastic too much. But I agree solvent cleaning after sanding can only help.
@JacobWard10112 жыл бұрын
is it just me or is this guy a perfectionist
@gk12343453413 жыл бұрын
@thunderrockets The commercial tornado tube threads match standard PET soda bottles, as that is what they are designed for.
@gk12343453413 жыл бұрын
@MrTomcarnahan Hi Tom, going beyond 4 couplings makes the rocket quite long and starts to be too flexible. Unless you use fiberglass for the bottles and fairings then you could probably do a couple more. The fiberglass provides extra stiffness. Each of these spliced pairs holds about 3.15L. How much water to add depends on a number of factors but 1/4 to 1/3 is about right. As long as the coupling has a larger diameter than the nozzle then you can pass water through them.
@gk12343453413 жыл бұрын
@MrTomcarnahan The fairing is just made of two bottle sections that overlap about 1cm. You don't need a lot of PL for this. I assemble them on a cardboard tube to keep them aligned. The length I worked out by trial and error. I just kept cutting sections off until it was the right size. We have different lengths depending on type of bottles and whether they have reinforcing or not. You want the fairing to be tight when you tighten the bottles in the coupling.
@sun55343 жыл бұрын
Instead of using the tube connector do you think I would be able to just cut the nozzle like top and connect them with the glue
@dominicbaglione86918 жыл бұрын
Are there any tutorials that just teach you how to make one of those long rockets??
@gk12343453411 жыл бұрын
Great, go for it! The more tutorials that are out there the better. :)
@siddharthrm63854 жыл бұрын
Oi , instead of using tape , will it be better if I use silicon .
@gk12343453412 жыл бұрын
Good question. The tape is used as a masking tape to make the splice look neater when finished otherwise you get the glue all over the bottle and it is difficult to remove.
@gk12343453411 жыл бұрын
Psi stands for pounds per square inch. The units are essentially force applied to an area. (in this case force measured in pounds and the area being a square inch) F=ma only refers to the force. A pressure gauge is used to measure pressure in psi.
@gk12343453413 жыл бұрын
@thunderrockets Oh okay. I'm not sure what the thread is, as it is unique to bottles. It's a non-standard thread, and is why you can't find components to fit. You can't easily get taps or dies for this thread either.
@gk12343453413 жыл бұрын
@AnCRockets What glue are you using? With PL premium cure time is very dependent on atmospheric humidity. We live in fairly humid conditions so after 5 days our splices are pretty much as strong as they can be. With these splices the bottle bursts before the splice does.
@KoN31213 жыл бұрын
Very clear instructions! Good Tut!
@gk12343453412 жыл бұрын
Thanks. :) Yes we have tried a Sikaflex only splice but it burst at around 80psi IIRC. This means you could only use it for launch pressures of perhaps 50psi. Sikaflex is just too soft. PL premium is 3 x stronger than Sikaflex 11FC. if you can get your hands on PL it will be worth your while. Wear gloves when handling it as it is very difficult to get off skin.
@Dontcopit10 жыл бұрын
And I was just going to use some gaffa tape lol ! Thank you for that its an excellent tutorial. Where do you get the couplers from ??? I think you called them "Tornado" or something like that?
@gk12343453413 жыл бұрын
@pudresful For these particular bottles, the unreinforced one is 102grams and the one with the reinforcing is 136 grams. The capacity is around 3.15 L.
@gk12343453412 жыл бұрын
You could try alternatives like Tornado tubes or Robinson couplings.
@gk12343453413 жыл бұрын
@promethium144 PL is not available in Oz and needs to be imported from the US. It only costs about $5 per tube. If you have friends or family in the US you could try asking them to send you some. You may be also able to find online stores that will ship it to you.
@OutFishedTv13 жыл бұрын
Hey gorge I just thought of what would happen if u made the tornado coupler by to bottle caps and u weld them to gather then drill the insides out in please try this
@gk12343453412 жыл бұрын
We've tested them to 270psi without them breaking, but not sure what the max pressure is. I wouldn't recommend using them above about 220-230psi.
@gk12343453411 жыл бұрын
Sikaflex by itself isn't very strong at all. The splice would fail at perhaps 50-60psi. We only use it as a seal because PL premium (which holds the splice together) can be porous.
@sun55343 жыл бұрын
Can you give me a link to the binning website what the pl premium
@gk12343453411 жыл бұрын
Loctite has a huge selection of glues. Did you have a specific one in mind?
@ruisimoes433711 жыл бұрын
thanks for the video! I love rockets and I'll try to make one
@fumcpi11 жыл бұрын
What is the purpose of curling the edge of one of the bottles? Is it for cosmetic purposes or is there another reason?
@bbwillii12 жыл бұрын
why do use the tape, is it primarily for strengthening purposes or as a marker? Thanks
@zeeleo1ify12 жыл бұрын
can u please tell me the exact name of the material which u r using here for joining the two bottles? and please tell me from which kind of shop i will get it ... like somewhere from the mechanic shop or from an electric shop?? please tell me m really upset i have made 4 bottle rocket with hardwork n spend 4 days on it and at the end it burst while experiment it did'nt bear even 40psi pressure :(
@gk12343453412 жыл бұрын
We do fly regular MPR as well, but water rockets present a different challenge. They are also have a much lower cost per launch. :)
@NGJIAXINMoe-v5fАй бұрын
Hi may i know what is the product of bottle you using it?
@gk12343453412 жыл бұрын
Not sure, we have never tried it. You would have to test it to see how much pressure it could hold.
@daftrucktwaalf363910 жыл бұрын
do you really need tornado couplings or you just can splicing it all the way
@gk12343453411 жыл бұрын
Ha ha good spotting. :) All filmed on the same day with one spliced bottle prepared a day earlier.
@FourDollaRacing9 жыл бұрын
How can you possibly drink that much lemonade!?
@nathanielbean31192 жыл бұрын
Lol
@gk12343453411 жыл бұрын
The sikaflex here is used as a seal, so pretty much any equivalent polyurethane based glue that doesn't bubble should be fine. If you are using PL premium you may be able to get away with just that instead of using the two glues. Where we live it is humid and the PL bubbles while it cures which makes some splices leak slightly. Hence why we are using the sikaflex which doesn't bubble as the seal.
@gk12343453413 жыл бұрын
@bobilol24 It's called a tornado coupling or tornado tube. You can buy these for a few dollars on line.
@Basrockets13 жыл бұрын
Very nice tutorial !
@gk12343453412 жыл бұрын
We bought ours from CoolThings Australia. There are lots of them available on line from different suppliers. Just google for "Tornado Tube" and you'll find them.
@yellowboxofdeath12 жыл бұрын
George have you made spliced bottles completely by Sikaflex - 11 FC,or should i try and get some of the PL Premium.thanks for the great videos
@slugfest968512 жыл бұрын
Wow! Now I can make some neat rockets that go almost as high as some of my 1700 foot launches! You are very skilled at water rockets, try actual model rockets though. not very expensive, 1700 foot launches.
@gk12343453413 жыл бұрын
@fatpeople249er This indeed has been tried before. Dan from British Water Rockets has had some good success heat welding the caps together to make Tornado tubes.
@Jff46282 жыл бұрын
Bonjour sa Sert a quoi collé les bouteille c pas plus lourd collé avec silicone que les vis ensemble
@juhorasimus0010 жыл бұрын
A HELPFULL ADVICE FOR ALL!!!!! Dont try to do this splicing with the epoxy glue! I tried it and it worked as long as I added pressure into the bottle. Becouse dried epoxy is very hard and not flexable at all, it broke when the bottle changed its shape while adding pressure. So then there was a huge explosion in my garage when these two bottles came separate again. I write this here, so you other can bee wiser than me.
@gk12343453410 жыл бұрын
I agree, Epoxy is not an ideal glue for splicing as it can crack. The more flexible polyurethane based glues work the best.
@istvanfrank92013 жыл бұрын
Would be working with pattex epoxy glue ?!
@ignacioburgos752411 жыл бұрын
amigo, admiro mucho lo que haces, SE PUEDE UTILIZAR UN TAPAGOTERAS SELLADOR BUTILICO ?
@46danz6 жыл бұрын
I hope nasa’s watching this,that’s a serious glue job
@gk12343453413 жыл бұрын
@bobilol24 Did the bottle explode or did the splice fail? How long did you let the glue cure?
@thunderrockets93013 жыл бұрын
@aircommand waterrockets, Actually what i meant was the size , like 1/4" 3/8" or something like that
@gk12343453413 жыл бұрын
@annoo4 We get the bottles from the shop but also friends and family give them to us when they are done. They know which bottles to buy. :)
@TheBiloxiBay13 жыл бұрын
so are you like a aerospace engineer or something?
@gk12343453411 жыл бұрын
Sorry, I don't have time to think about my age, I'm having way too much fun with water rockets.
@markymarco25706 жыл бұрын
Can you please use it as a roof lamp for us to see?
@tonystack75725 жыл бұрын
This bottle can withstand several atmospheres
@tonystack75725 жыл бұрын
???
@supremeAFA11 жыл бұрын
how do you measure psi ,because i only know how to calculate newtons or force by f=ma
@mitz0001 Жыл бұрын
Thanks for this George, its a great tutorial, very clean and easy to follow. I’ve been doing a bit of research into glues readily available in the UK that are polyurethane based, Sika do one called ebt+ have you come across it? It’s very elastic, like a silicone but seems to have good adhesion. I’ve got a bottle curing so time will tell. Otherwise I’ll be on the hunt for some PL premium!
@mitz0001 Жыл бұрын
After a few tests I can confirm sikaflex EBT+ works great here’s our latest rocket kzbin.infoPWY9-Tle0A8?feature=share
@thunderrockets93013 жыл бұрын
What is the size of the threads in the tornado coupling?
@richardray68272 жыл бұрын
Thanks very much for all your quality educational videos. Any idea where we can get PL Premiumin Australia?
@gk1234345342 жыл бұрын
Master's hardware used to sell in here in Oz, but I don't think they are around anymore. I would just order it through e-bay or Amazon. The brandname is Locktite these days, but it is the same adhesive.
@gk12343453411 жыл бұрын
That is a commercially available "tornado tube" they usually cost a couple of dollars.
@MoritzSimon0312 жыл бұрын
With how many psi can the tornado tubes handle?
@gk12343453413 жыл бұрын
@bobilol24 Sorry, I thought before you said you used PL premium. You need to give the splice at least a full week to cure. 1 day is not enough.
@gk12343453413 жыл бұрын
@Abalancedproduction They are available commercially. Search for "Tornado Tube".
@fathkalaidji11 жыл бұрын
can I make a similar tutorial in spanish. A and very good tuto it helped me alot
@ctk.academy12 жыл бұрын
handy man...so good
@sam8003611 жыл бұрын
I ask you a question what is the red one??
@zeeleo1ify12 жыл бұрын
i use plastic cement ... it was useless ... i dont know where can i find this PL Premium :(
@erikw78913 жыл бұрын
where do you get PET bottles?Please answer me soon.
@ThePremiumsmore11 жыл бұрын
Hey just asking do you have a tutorial on how to MAKE a rocket
@zeeleo1ify12 жыл бұрын
well thanks alot :) i will search for it in all hardware shops and also on Internet :) Thanku so much .. i will contact later if i would find any difficulty in making this rocket :)
@add11149711 жыл бұрын
What is a substitute for sikaflex? I can't find the stuff anywhere!
@MrGeemonty3 жыл бұрын
can i use googone to remove the label adhesive?
10 жыл бұрын
Very good tutorial! :)
@trantrongphuc154611 жыл бұрын
that very very nice, i like it, thankyou so much
@carlosbuitrago681910 жыл бұрын
And what other type of glue can I use?
@bobilol2413 жыл бұрын
wath piece do you take to screw your bottle to an other
@peroperic2310 жыл бұрын
whether the exchange can use sanitary silicone
@Bigboiwil10 жыл бұрын
Is it possible to achieve around 200psi if I had Pl premium,sikaflex and glass fibre tape? If not how could get that?
@gk12343453410 жыл бұрын
200psi would be pushing it fairly close to the limit. It all would depend on how many layers of the glass fiber tape you would use. You always want to keep some kind of safety margin too to allow for variation in joint strength between different joints, and variation in bottle strength.
@bbwillii10 жыл бұрын
gk123434534 I've bought some fibre glass tape and pushed around 150 FOR 1 layer. The only thing is finding the balance between strength and weight! I don't want to put too many layers. I wonder how I can calculate for those values...hmmm
@Jsut21011 жыл бұрын
I have found that any solvent labeled "Paint Thinner" will take the labels right off.
@bbwillii12 жыл бұрын
where did you get the orange tornado tubes from??
@daftrucktwaalf363910 жыл бұрын
do you really need pl premium or not
@fathkalaidji11 жыл бұрын
Okey thank you very much
@jasonoutdoors50747 жыл бұрын
what's the purpose of curling the shrunk bottle? thanks for responding to this question
@gk1234345347 жыл бұрын
It keeps the edge nice and round, and makes it easier to insert into the other bottle.
@jasonoutdoors50747 жыл бұрын
im making "relatively" high-pressure water rocket and im having fun doing with.. im following your techniques thanks for that
@gk12343453411 жыл бұрын
Sorry, not sure whether loctite 401 is suitable.
@charliethomlinson94411 жыл бұрын
What are the names of the two glues that you use?
@gk12343453411 жыл бұрын
The splice will hold more than the burst pressure of the bottle. ~180psi
@LawrenceWalton-k5b12 жыл бұрын
Hello, I am Taiwanese, you will make a model of grain rocket? I want to learn, but my English is not good, I use a translator to translate see Please reply me?? Thank you very much ~
@nanotechx7 жыл бұрын
Can you please tell me any alternative for pl premium polyurethane construction adhesive? Do you know any similar material in Sika brand?
@georgekatz64167 жыл бұрын
Sorry. I haven't yet come across any other glue that is as good as PL premium.
@nanotechx6 жыл бұрын
Hi finally i have found PL premium now but again another problem I don't find Sikaflex 11fc can you please suggest an alternative for that? Please.
@add11149711 жыл бұрын
Ok I'll try that Thanks!
@ReptigloRand12 жыл бұрын
Can you use all PL premium?
@nimthedib11 жыл бұрын
You join them with what?
@autumngamboa176211 жыл бұрын
Thank u for the vid I am now going to make one (wish me luck)