THE Jet Pump I Have Always Wanted. M-Jet 35 Reveal

[@mjetdevelopment]

The M-Jet 35 development has been finished! Buy the files here and make your boat fly: www.cgtrader.com/3d-print-models/hobby-diy/other/m-jet-35-3d-printable-jet-pump-for-rc-boats

[@MrJob91]

A man, A pool and his diy pump. What a beauty

[@bccanoe]

What a beast of a pump, well done! Would love to see thrust measurements for it.

[@mjetdevelopment]

Thanks! Thrust measurement and all details will follow in further videos:)

[@sepultura1981]

Congratulations! the wait was worth it

[@joedifrancesco8182]

Looking forward to your 60mm version! Love the steering mechanism...so elegant.

[@ianhoffman3891]

Off to solidworks I go.

[@michaelshaughnessy9809]

Great work, truly unique and innovative.

[@ricardooreamillan3674]

I've been following you for a long time from Spain, and this version really impressed me! very good work! Hopefully I can get my design to work half as well!

[@mjetdevelopment]

Thanks! I wish you good luck with your build, maybe this gives you some inspiration as well

[@ricardooreamillan3674]

@@mjetdevelopment Thank you very much! your ideas really are a great inspiration!

[@louis_sckr42]

awesome job!!

[@Zane65205]

I have a very mild knowledge of fluid dynamics and design, but it is pretty apparent that this thing is a masterpiece.

[@mjetdevelopment]

Thank you!

[@MrDesperadus]

Wow, I taught I would never find anything I would rather buy than heroin, I was mistaken - this is so lit

[@Antonp21654]

That Pump is a beast. I would love to one day buy the STL files from you and Print my own for a build that I'm working on. Who knows one day perhaps.

[@thomashogg2341]

This is jawdroppingly incredible. When can we expect to be able to buy the STL files? The sooner the better, I need to instal the jet drives first before I can even start on the rest of this boat I'm trying to build. No pressure though, but HURRY UP!!!

[@thomashogg2341]

@@mjetdevelopment I fully understand and will be first in the queue when you decide to sell them physically.

[@Pascal_Robert--Rc_Creations]

Thats looks really nice man! Good job! So, can we buy something like this? When?

[@DeMoN_Ek9]

Would love to buy one and install it into my ski tiger rc jet ski from 1999. It would be so awesome!!

[@mjetdevelopment]

Ah sounds great!

[@rumbleman]

I can't wait for the thrust numbers I wonder how big one would have to be to move a full size jet boat... 🤯

[@mjetdevelopment]

For a small jetboat, I estimate like 100mm pump to at least move it

[@Emaxxspeed]

Wow amazing work such power in that drive, can't wait to start building one! Are you releasing the files soon?

[@mjetdevelopment]

I have different plans. Since there is so much work in this and at the same it is relatively simple to manufacture, I would rather start selling it physically in future than share the files. So I will not share them yet.

[@poggersgaming5395]

I really want one and just got my 3d printer but don’t have the money to buy one but really nice job 😊 Btw I’ma kid not an adult

[@DeMoN_Ek9]

If compressing the water like a turbo does with air would that increase pressure out the nozzle? Less rpm the motor would need but definitely more torque.

[@mjetdevelopment]

Hmm how do you mean? Unlike air, water pretty much cannot be compressed. The water is just accelerated in the nozzle, which increases pressure at the impeller because of the Bernoulli equation. Making the nozzle even smaller would increase this impeller pressure and water would come out faster, but it would increase amp draw and decrease flow rate, decreasing thurst force.

[@DeMoN_Ek9]

@@mjetdevelopment That makes more sense now. Never thought of the pressure making more draw on the motor. Fine line between efficiency and performance and reliability. I’m just very intrigued with the engineering and data testing.

[@OnlyFins]

I'm really curious about how much thrust this makes, as well as current draw. I've been trying to figure out how to rig a pair of jets on my kayak. 🤣💀

[@mjetdevelopment]

I measured the thrust and all specs in the following video! kzbin.info/www/bejne/qHfaoHmFeNqqbJI However the size of the pump is still way too small for a kayak.

[@blackowll3]

Is the model scalable to attach to a kayak?

[@mjetdevelopment]

There are many problems arising if you attempt to change scale of any M-Jet design. All fastener sizes, bearings, shafts, seals, motor mount, servo mount all become incompatible and possibly generating non-existing requirements for dimensions of these parts. Solving this requires a lot of additional effort.

[@dragonconley44]

Awesome when are the files going to be released? It looks like it’s going to be a really fast and powerful pump that can move some serious water.

[@mjetdevelopment]

Thanks! It is powerful. I am not sharing the files though, I explained how the things are in my pinned comment:)

[@dragonconley44]

@@mjetdevelopment ok bummer. I guess I will have to wait until someone else comes up with a similar design. Keep up the awesome work.

[@mjetdevelopment]

@@dragonconley44 As I said, there will be the option to buy it physically. But I understand that buying a complete pump might not be your goal.

[@dragonconley44]

@@mjetdevelopment I hope you incorporate it into the jet boat design as I just purchased the files and started printing it as well last night. Since I purchased the files do I get future updates of your design in the future or will I have to purchase it as a separate mod?

[@mjetdevelopment]

@@dragonconley44 If I do any updates to the M-Jet Sprint, you will get all of them. There are also many mods available already in the "Mods_for_M-Jet_Sprint" folder. If you need to decide which one to pick, you can join the M-Jet RC Jetboats facebook group, there are many people who use different mods and can discuss them.

[@emory442]

How big of a boat are you planning to build around that monster?

[@mjetdevelopment]

50cm sprint hull. I could go much bigger with this pump but I dont want to. I will run a 3674 motor accordingly, even though the pump could handle a bigger one.

[@vortkes4684]

How can I find out when it is being sold? Do you have an eta?

[@mjetdevelopment]

@@vortkes4684 It will definitely take some months and I dont know how well my current steps will go. Firstly I need to build the sprint boat and do a lot of testing. But if you watch my youtube channel you will not miss anything.

[@vortkes4684]

OK good luck with it

[@UppfinnarAXEL]

That jet drive really has incredible power! If you plan on selling the files, I would really like to buy them.

[@ElTelBaby]

@@mjetdevelopment Selling this Jet Pump on;... in the open Market... Opens U up 4 all kinds of copies from all over the world... U will B 4 ever chasing concept infringements... Sell that concept with royalties attached;... while reserving the rights to build a better version... Then live your life in relative luxury...

[@ElTelBaby]

@@mjetdevelopment I didn't mention patent 4 that reason... It is your concept U R protecting;... the inner working of your design... Which U pretty much have buttoned up here as all videos R Date Stamp along with a unique identification number... Make sure U have several copies... U need that in a Sealed Register letter;... posted 2 yourself & 1 2 the courts... Marked NEVER 2 B opened... 2 B opened by a Judge as proof of concept is challenged along with a explanatory letter explaining your concept & dates etc along with what is in your sealed letter;... so they can B compared... If & when it does go pear shaped... U only give PERMISSION 2 a JUDGE on OATH 2 open it... He must then seal it back up with court seals...

[@mjetdevelopment]

​@@ElTelBaby Interesting what you are saying right here, I am not experienced in this field but if I get an opportunity I will ask someone how exactly this works in my country and then do with it.

[@ElTelBaby]

@@mjetdevelopment I'm NOT legally trained either;.. nor would ever want 2 B... But what I do;... do well;... is my due diligence & intensive research... & good luck;... your Jet Motor is awesome... GR8 work & dedication...

[@ProtonFilms_Mark]

This shall be the most fun water gun ever lol. Out of curiosity, what do you reckon the complete package will cost?

[@ProtonFilms_Mark]

@@mjetdevelopment I mean, I saw kits on AliExpress with plastic impellers and nowhere near the performance for right about that price, so sounds like a bargain to me.

[@ProtonFilms_Mark]

@@mjetdevelopment I hope you don't mind me prodding you for info. Do you reckon that for my water gun purposes with the M30, will I need water cooling? I highly doubt I will be able to sustain fire for more than 60 seconds at a time. I also have trouble wrapping my head around kv, is more than 1750 overkill? If I understand correctly, the more kv a motor has, the more power it will have (power as in torque*revolutions per minute), but will conversely have less torque. Will probably need torque to produce a proper stream from the get go.

[@mjetdevelopment]

@@ProtonFilms_Mark For any brushless motor spinning a jet pump, I would recommend watercooling, unless your motor is oversized (like a 4074 in this case) and placed outside with free air flowing around it. KV is indirectly proportional to your battery voltage. The optimal unloaded RPM for the M-Jet 30 to get the best overall performance from it is around 27000. That means your battery voltage multiplied by motor kv should be around 27000. Now, sorry for a long explanation but the thing with torque is not that simple. Torque depends proportionally on current and indirectly on motor kv. Therefore low kv motors produce more torque for the given current, however they heat up more with this given current, therefore they cannot take as much amps before they start smoking. Because of this, it is equal to load a 2000kv motor on 10 volts 100 amps and load a 1000kv motor on 20 volts 50 amps, both will produce same rpm and torque, you just need different batteries and escs. What I like to do is to run 6s lipo and choose a low kv motor to get the desired rpm. Because of higher voltage, this makes the amps lower with the same power, and requires a smaller esc. So finally, For your particular application I would recommend running a 1000-1200kv 4074 motor or similar on 6s, and expect 55 amp draw. Or a 1550-1800kv on 4s and expect 80 amp draw.

[@ProtonFilms_Mark]

@@mjetdevelopment not to worry, I love in-depth explanations. Thanks!

[@rogierpluylaar3610]

Sell the hardware not the printing

[@mjetdevelopment]

Why are you suggesting that? Would you like to get one, but you don't have a 3D printer?