gk123434534

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@awo6895 3 ай бұрын

If you've been watching this video recently and don't have access to PL Premium, Sikaflex Fix works very well for rockets up to 120psi, above that only with reinforcement in the bottle

@ArcturusArcher 8 ай бұрын

New bottle caps, new methods... Trying a 20mm nozzle design with PVC pipe as launch tube and interconnection pieces for bottle butt to butt and variable connections. Bigger nozzle, stronger but shorter thrust lol

@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

@mikehunt9993 Жыл бұрын

Luv ya video,hooked actually!ok so for modern day morons like myself who's just decided playing around with water rockets can be a blast!(haha like that)with a 5yr old for a back up astronaut in a nutshell what was the verdict???a few drops of bubble bath is more than worth it??

@georgekatz6416 Жыл бұрын

Yes, bubble bath does make an appreciable difference to the performance of the rocket. It can be in the order of 10-20% more altitude.

@mrquackerz9346 2 жыл бұрын

how do u even get air into the second bottle? or maybe it is simple and i am just overthinking it.

@Jff4628 2 жыл бұрын

Bonjour sa Sert a quoi collé les bouteille c pas plus lourd collé avec silicone que les vis ensemble

@SirDeanosity 2 жыл бұрын

At 1:10 I see the cap end of one bottle connected to the bottom of the bottom bottle. What connection method did you use?

@SirDeanosity 2 жыл бұрын

How did you reinforce the 2 liter bottles to withstand 205psi?

@richardray6827 2 жыл бұрын

Thanks very much for all your quality educational videos. Any idea where we can get PL Premiumin Australia?

@gk123434534 2 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.

@sun5534 2 жыл бұрын

Hey mate how come I need to use PL premium for the sleeve instead of Stika

@gk123434534 2 жыл бұрын

PL premium is so much stronger than Sikaflex. Sikaflex by itself will fail at much lower pressures. The bottle will burst before PL lets go.

@sun5534 2 жыл бұрын

@@gk123434534 aha i thought they where simmilar

@sun5534 2 жыл бұрын

@@gk123434534 do you know where i can get PL premium in a australian store?

@gk123434534 2 жыл бұрын

@@sun5534 Sorry I do not. I've always ordered it from overseas.

@sun5534 2 жыл бұрын

@@gk123434534 any websites you recomend i got one off amazon and the top of the glue dried so i couldnt use it!!

@otrag_1116 2 жыл бұрын

thank you!

@sun5534 2 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

@sun5534 2 жыл бұрын

could i sue liquid nail for the splice?

@gk123434534 2 жыл бұрын

Liquid nails is not strong enough.

@Gesomaru. 2 жыл бұрын

The quick connector we're having hereis made out of metal, if I follow your instructions but a different connector is it going to give the same result?

@gk123434534 2 жыл бұрын

yes

@wfi2933 2 жыл бұрын

Hi guys i have a problem.When i release the bottle from launcher the bottle doesn't fly up deviates left or right I think it's because of the center of gravity.Because the nozzle itself weighs and this moves the center of gravity upwards I haven't made a rocket yet, I'm just testing with a normal bottle how can I solve this problem ?

@gk123434534 2 жыл бұрын

It sounds like a classic case of rocket/bottle being unstable. You need to make sure your center of gravity is ahead of your center of pressure. This means adding a bit of nose weight to the top of your bottle, and adding some fins to the back of the bottle. If it is a single bottle, then perhaps try 50g as the nose weight. Make sure your fins are light, and are as far back as possible and that they are stiff and don't flop around. That should get your rocket nice and stable.

@MrBellda 2 жыл бұрын

:-)

@MrBellda 2 жыл бұрын

12 years on, and I still enjoy watching this.... Thanks George...

@upmanyubhati 3 жыл бұрын

lol

@istvanfrank9201 3 жыл бұрын

Would be working with pattex epoxy glue ?!

@MrGeemonty 3 жыл бұрын

can i use googone to remove the label adhesive?

@old_guard2431 3 жыл бұрын

(I have this far-fetched notion of putting together a bottle water rocket-firing Gatling gun using some of the concepts found in your and your colleagues' work.)

@old_guard2431 3 жыл бұрын

Nicely done - going to the link I was interested in the difference between the results of the 7mm and 9mm nozzles. Boring or lining the nozzle would give you some options on both size and configuration - I was particularly interested in whether using a conical nozzle would gain some efficiency, as it does with chemical rockets. The web site article on nozzles (www.aircommandrockets.com/nozzles.htm) has some interesting links.

@old_guard2431 3 жыл бұрын

Very good - I particularly like the improvised vertical lathe. I would have been tempted to use a die grinder (aka "Dremel") with a sanding drum at some stages, but it would probably be too aggressive and therefor difficult to control. Hand tools such as files are a better option.

@noahveenink8566 3 жыл бұрын

i need something like this to get a ten for scool. so well made and it goes so far! very good mate!

@istvanfrank9201 3 жыл бұрын

Aluminium és sósav , egy nyomásmérővel kioldó szerkezettel, mit szólsz egész komoly lenne!

@mrjers8087 4 жыл бұрын

This helpt me a lot

@charleshetrick3152 4 жыл бұрын

Cause of the covid my kids and I got into this. I use a male thread QD for the bottle connection and sand off the thread. Then boil some water and heat up the bottle top and swage fit the QD nozzle then right in the ice. Some times it’s a little loose so just hit it with some super glue

@blueskiesspacetechnologies8217 4 жыл бұрын

now, 14 years later, it still looks very cool

@garethwalker5555 4 жыл бұрын

where can i get one of these now ?

@gk123434534 4 жыл бұрын

Unfortunately there are no longer for sale.

@jlions72 4 жыл бұрын

Question ,what did you use to to join the completed set of 2 bottles together you screwed them together what did you use please ?...I did not get that part ...thanks

@Alexander_Sannikov 4 жыл бұрын

how come these are uploaded from a different channel?

@gk123434534 4 жыл бұрын

This is our old channel. we don't upload here anymore.

@kareemsalessi 4 жыл бұрын

So, you achieved a max-thrust===3.5 kg-force. Did you try to launch it?? If so, how much did it weigh at launch, and how far did it ascend??? thanks

@gk123434534 4 жыл бұрын

The intention wasn't to generate useful thrust for launch. It was measuring how much thrust is generated by stretching the walls of the bottle.

@Juno_Beach 4 жыл бұрын

... and pack your parachute

@calderbmx1838 4 жыл бұрын

What were those bottles from?

@AirCommandRockets 4 жыл бұрын

There a few years old now. They were just from lemonade.

@yottaplex2239 4 жыл бұрын

What foam are yu using?

@AirCommandRockets 4 жыл бұрын

Shampoo, or kids bubble bath mix

@yottaplex2239 4 жыл бұрын

@@AirCommandRockets i tried with a mix of dish soap and water, however, the foam is not expelled from the nozzle, and stays inside the chamber, do you have any idea of why that happened?

@AirCommandRockets 4 жыл бұрын

Interesting. Was the foam just sitting on top of the water? Or was the water volume full of foam? How much pressure did you use?

@yottaplex2239 4 жыл бұрын

@@AirCommandRockets i used 150 psi, it was sitting on top of the water.

@AirCommandRockets 4 жыл бұрын

Okay, so I am not surprised that the water just came out ahead of the foam. There is no way for the foam to really come out until the water gets out of the way. So what needs to happen is that the foam needs to be all mixed up with the water if you want the foam to come out when your release the pressure. Have a look at 'Jet Foaming' where it generates the foam when you release the pressure: www.aircommandrockets.com/day105.htm

@007-Bond 4 жыл бұрын

Very professional filming and explaining. Awesome video.

@PaulGreggBYRC 4 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.

@gk123434534 4 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.