3D Printed Water Jet with 4 POWERFUL INDEPENDENT NOZZLES

[@nuttyDesignAndFab]

Diverging nozzles only work for gasses. A single nozzle is more efficient than 4 smaller ones.

[@fdfdfsdfful]

But why?? can you explain ??

[@krain.8245]

​@@fdfdfsdfful The diverging section of a supersonic nozzle accelerates a hot gas at sonic speed into supersonic speed. This only works if the speed of the gas is at the speed of sound at the throat, that is it's choked at throat.

[@krain.8245]

@@fdfdfsdfful This simple fact is what "hobby" inventors lack, proper knowledge about engineering and physics.

[@nuttyDesignAndFab]

@@fdfdfsdfful diverging nozzles require a gas to expand at supersonic speeds. water does not expand. a single nozzle has a higher internal area vs perimeter, vs 4 smaller nozzles. the perimeter adds drag to the flow. Not saying this to take anything away from the work, it's awesome when people make stuff. just hoping to spread knowledge

[@Giuliana-w1f]

​@@fdfdfsdfful a diverging nozzle is used to recover extra power from exhaust gasses when the pressure from them is higher than the atmospheric pressure arround. Water cannot expand in the same way, so a straight nozzle of the correct diameter is the best nozzle.

[@russellzauner]

Get a machined spring coupler and join your impeller shaft to a high power offroad skateboard motor you have mounted in your boat, because if you take off the skateboard wheel, you can use the threaded end of the shaft to connect to the impeller, all the gear reduction is already built in and it's built to carry riders down a mountain so pushing the water should be okay, reliability/durability-wise. Thanks for all the inspiration and taking time to produce this upload for us.

[@robertotomasini2072]

It is a nice project. Nozzle design is nice to look at, but not optimal: you are reducing the speed of water by letting it expand. Also, there is the possibility of cavitation in that recessed parts (less thrust and faster failure). Your design works well for gas, but water is a nearly incompressible fluid, so it's the wrong geometry.

[@novaldipadmadisyiffa3022]

Genius design 👍👍, to be honest, I had never thought about how to design a flexible nozzle mechanism like this

[@Brandon_Makes_Stuff]

That's awesome!!! I don't care if it's not efficient, it's cool. 🤙🤙

[@LetsPrintYT]

The key point of the design was to make it cool not efficient. ;)

[@MCsCreations]

Brilliant work, dude! Nicely done!!! 😃 Stay safe there with your family! 🖖😊

[@nunyabisnass1141]

I recommend using a tapered bearing on the shoe, since there's bound to be a lot of friction in that area. It might be a good idea to 3d print that, since metal and water, obviously.

[@WW-bt3tx]

Awesome project. When using transparent FDM only slow and hot extrusion helped a lot for me.

[@nathanieljames7462]

Your comedic timing and accent in dropping, "I fucked up" is hilarious 😂

[@colinsmith6340]

100 percent agree. Its all serious then "i fucked up" hahaha

[@christiansrensen3810]

Very cool. For making costume seals. Its easy with some fdm printed negative molds. Use 2 or 3 cask. But use 2 componet mould Silicone. I have made many costume seals. And can do very complex geometry. You should give af go. Tip...make sure to make small holes in the form for air to escape. Inject with a syringe. When silicone is coming out of the went holes. Close them up and continue to add some extra silone to fill out any cavatiees.

[@LetsPrintYT]

I will look into it!

[@Avidiy]

Wow! Well played.

[@FireN2k9]

M-Jet 35 (printable jet) has 4 outlets and steering too :)

[@LetsPrintYT]

I got inspired by him! He is doing excellent work.

[@BRUXXUS]

Not a fan of HeyGears, but I can't blame you for accepting their sponsorship and free toys! I just hope they also sent plenty of their DRM resin. You can't use their printers with your own resin. Their resin is chipped and printers won't work unless you keep buying their resin. 😐 if they go out of business, I guess you just have to throw those extremely expensive printers in the trash. I don't like that.

[@swecreations]

Really? Yeah that's extremely shitty.

[@BRUXXUS]

@@swecreations Yeah. :( I saw another KZbinr that was sponsored and I looked into them because I thought they looked really nice. And, they are extremely high quality printers, but there's no way I'd buy from a company that locks me into their own consumables.

[@fireheadpet2039]

Another great video! Suggestion for a next video, the USA Air Force mobile firefighting water gun that they attach to their C-130. You should see the cool of that nozzle, a reverse tear drop. I don't have resin prt but will try some experiment. This is right up your alley!

[@mrnlce7939]

Have you tried TPU printed gaskets? That way you can still take it apart without having to reapply the silicon. Great video. Keep up the good work.

[@LetsPrintYT]

Hi, yes I have tried TPU gasket, they don't work they actually make things even worse.

[@32BitJunkie]

What happened? How did the tpu fail?

[@piconano]

Your designs are getting more and more complicated with every video. That's excellent.

[@oOWaschBaerOo]

wouldnt it be best to also have a thrust bearing at the beginning of that shoe ?

[@Rulusto]

scrolled down to the comments to type just that.

[@oOWaschBaerOo]

@@Rulusto propably even better to have it on both sides , incase of thrust reversing

[@rdcabal]

@@oOWaschBaerOo his pumps lack that, causing fine explosions.

[@Br216_7]

The 4 separate nozzles could be used for high precision docking if they were fully submerged.

[@Sir-Dexter]

nice work

[@Rockefeller.69]

Beautiful

[@incognitoalias2808]

Thanks for the Enlightment.......

[@BartJBols]

You would gain a lot of efficiency if you added an open shroud around the nozzles that can pull in water from the front and let it flow around the jet.

[@quantumenergysolutions9128]

You are very talented well done! Did you know ? Ive seen no one on YT take the strongest resin for printing and add FLG Few Layer graphene powder to it? Please can you do a dog bone strength test with eg 2% 3% 4% 5% 6% added FLG? I promise it will get many views....

[@BlackHeartScyther]

Nice video idea! I have seen strength tests with FLG additive in resin, just a few % makes a massive difference in strength. Would need a motor strong enough to utilize the added strength and possibly compare a closed style impeller against the screw style (or maybe a closed screw?) to see if you get any more thrust that way.

[@sleepib]

The expanding portion of the nozzle isn't helping performance. Rocket engines do that only when the exhaust is underexpanded, but water is incompressible, so all you're doing is slowing down the water's exit velocity.

[@SgtCyan]

thrust vectoring boat nice

[@Br216_7]

All boats use thrust vectoring

[@mk-Watch-9000]

Cool!

[@r25012501]

Dude built a rocket gimble for water nozzel!

[@knightrider8020]

please make a speed boat with the 3D printed water jet

[@LetsPrintYT]

Here it is: kzbin.info/www/bejne/bJ_Vq6KZp6ilmaM&ab_channel=Let%27sPrint

[@knightrider8020]

@@LetsPrintYT I meant that you should use your new design on the racing boat and I already watched the video the day it came out

[@GlerpidyGlarson]

The quad blasta

[@kallekula84]

slap it on a boat like rctestflight! :)

[@AhmedTalaat-zd1qh]

Where can someone learn more about these stuff, it's for my grad Project

[@Mustafa_Fpv_3D]

❤❤❤👍👍👍

[@pr3sidentspence]

How much thrust does it produce? From what motors and using how much power?

[@coolcat498]

FINALLY ANOTHER 3D PRINTED JET DRIVE VIDEO

[@coolcat498]

Also i dont really think the decompression in the pocket does much

[@ADRIAAN1007]

Shouldn't there be a thrust bearing between the impeller and housing shoe

[@minetimewithme3947]

Why does the hydro fan sound like the heavies mini gun starting up

[@norbberting3849]

I really like the way he said " You don't need to use your own brain". Very Russian.

[@danbrit9848]

you need a thrust barring on the shoe as you call it

[@louissienna7437]

Wdym only 4.5seconds. I take like 2 seconds per layer, or is this a laser one and not a screen one?

[@unknownflyer90]

Remember: PUMP, not BUMP.

[@RCYGALIH]

bro new water pump design in youtube preassurerizing centrifugal pump by ryouchi yonehara

[@TommyApel]

Is there a reason why you don't create channels for o-rings ?

[@1stPrinciples455]

👏

[@yertzar775]

Hey hey hey Portuguese Pastel de Nata ???

[@andrewprint7523]

you would gave way more trust with with a daul stage propeller and single outlet. also with this setup you lose allot of power because of pressure loss.

[@rjj54321]

why diverging nozzle?

[@nodariel]

Aesthetically I really dig it 😄

[@yuh-321]

Клоунада! Сопло Лаваля для воды 😂😂😂😂😂😂😂😂😂😂😂

[@rdcabal]

Why dump the water in the air? Water cant push against air. What a loss otlf thrust...put the nozzles underwater, please.

[@Fischertek]

That's unfortunately not how things work. Jet nozzle in free air makes a higher push force as the water jet velocity is not restricted by the surrounding water. Watch naval engineering YT channel about waterjets 🙂: kzbin.info/www/bejne/eWrNeH6Xnr98mbM

[@rdcabal]

@@Fischertek is this also why jetski has it underwater or is it not a jet?

[@Fischertek]

@@rdcabal If you see the linked video, you can find the answer. Not all jetski's are jet propulsed.... A propeller in a tube is not a jet. Beside that, it's pure physics.

[@rdcabal]

@@Fischertek so, wj are brutes on power... The way i see it, wj are for toys, where not getting chopped by an outside impeller is critical.

[@geekmidget]

@rdcabal that's how jets work in general, flow pushes against molecules already pushed instants ago. Since air has lower resistance than water, drag from turbulence caused by backwash practically doesn't exist and flow can therefore reach greater velocity.

[@eduardovenegas782]

Water does not comprise as air... Waste of time and money

[@geekmidget]

Not sure the divergent section does much with incompressible fluid, but it's otherwise an interesting steering system. Kudos! 👍 BTW is it my imagination or I see in your projects a little of inspiration from @mjetdevelopment designs? 🙃

[@LetsPrintYT]

I got inspired by him! He is doing excellent work with jet drives.

[@orestwolfgang556]

pathetic design