M-Jet Sprint - 3D Printable RC Jetsprint Boat Model 3D print model

Vacation update: From 16.7. to 31.7. 2021 I am on a vacation and will not respond to any comments or product support. I will answer everything afterwards. Thanks for understanding.

Note: This is not a physical product. After purchase, you can download computer files which you can use to manufacture your own parts on a 3D printer.

Fully functional and complete RC boat model. You get 18 STL files for 18 parts of the boat, designed to be FDM 3D printed, 16 of them with no supports. You can 3D print it and assemble it with help of the manual, link below. You need to buy all electronics, screws and other necessary parts yourself - part list is in the manual, too.

The f3d files, STEP files or any similar CAD format is not included. I cannot share it for various reasons.

COMPLETE PDF MANUAL: https://drive.google.com/file/d/1JXAqPCIegU0TW2XvNSiWBZ-T3o3yTSlP/view?usp=sharing

Includes part list, printer requierements, print settings, assembly guide.

M-Jet Sprint overview

1/10 scale, 39cm hull length. My boat weights 1200g, the weight depends on the electronics you choose.

Two stage jet pump, meaning it has two impellers. 27mm diameter. The pump is integrated into the hull body. It achieves very consistent performance and has no issues with priming, like many single stage pumps do. My impeller mounting system does not use any glue or grub screws, therefore makes the maintenance very simple. All thrust is absorbed into a thrust bearing, there is no force on the motor shaft. It is based on my M-Jet 30 jet drive and shares the key features with it, read reviews here: https://www.cgtrader.com/3d-print-models/hobby-diy/other/m-jet-3d-printable-jet-drive-for-rc-boats

Integrated watercooling: Both inlet and outlet for your watercooling loop are integrated into the design.

Self righting works thanks to a flood chamber - a chamber that gets filled with water when the boat flips over. The side with the chamber gets heavier and flips your boat back. When driving forward again, all the water flows out.

Optional pilots and V8 engine are included in the STL files.

Integrated mounts for the motor, battery, ESC and receiver.

Motor choice: You can use up to 3660 size brushless motor. Read more in the manual.

Please note that this final version of the M-Jet Sprint does not contain the receiver drybox anymore, which was seen in my one of my previous youtube videos showing the development of this boat. After testing the drybox, I found out it would not work as I intended - water was getting inside anyway and it was taking too much space. Therefore I reworked and improved the main cover seal of the hull and removed the drybox completely. Now I recommend just using a plastic bag, which in combination with the new main seal works better overall.

Update 27.03.2021: The Motor choice section in the manual was edited after testing more motors with the boat.

Update 25.04.2021: A new folder Mods_for_M-Jet_Sprint was added to the files. It includes new modifications of the boat design with some ideas coming from the community, which suit different needs. Added mods: thicker hull mod, thicker cover mod, ride plate mod.

  • ddelvecchio1971
    2021-03-23 15:44
    I have your original M-Jet with the motor Turnigy 3660-1700kv, Is that to low of a kv for this boat?
    • stepanmullerstepanmuller
      2021-03-23 15:47
      If you run it on 4S, it will be slower than what I show in the video. But you can use higher voltage if you have a small 6S battery for example.
      • stepanmullerstepanmuller
        2021-03-30 11:58
        Update: I tested the 3660 1700kv motor and it actually spinned the pump better than the original 3660 3180kv motor that is running in the video.
    • pphoenixdragp
      2021-04-06 21:57
      Good Work
      • aaraydotcn
        2021-04-11 13:47
        Great job! I just purchased your model. It will be perfect if you can provide the hull STL with one piece because I have a 3D printer with 400mm Z height. I wish the boat hull will be perfect if it can be printed with one piece. Thanks
        • stepanmullerstepanmuller
          2021-04-11 17:48
          Thanks! You might have some trouble with the front part of the hull, where the slot for the cover seal is normally supposed to lie flat on the build plate when printing the Hull_front. But anyway, I will send you the STL for the hull as one piece tomorrow. Stepan
          • stepanmullerstepanmuller
            2021-04-12 16:25
            I sent you the new STL in a message. Stepan
            • hhegedus-rp
              2021-07-20 07:58
              I had problems with the lid sealing, and I think it is because the joint in de hull. My printer is capable of printing quite high in Z so I could benefit from the one piece hull .stl . If it is possible please send me the file.
          • sschultz1918
            2021-05-28 11:47
            did you get it to work all one piece?
          • CChristking53
            2021-04-13 07:42
            You did a very good job with that boat! I purchased it. Do you think you could make a 4200 size motor with watercooling (48mm) fit in that boat? Or is that just too much power?
            • stepanmullerstepanmuller
              2021-04-13 07:50
              Hi, the 3660 size is the biggest possible that I can fit in a boat of this scale. Any bigger would cause problems with the height, width and weight of the motor, and the electronics would hardly fit inside as well.
              • CChristking53
                2021-04-13 08:08
                Ok thanks for the fast reply!
                • CChristking53
                  2021-05-24 09:37
                  I have an other question Could I get the files for the driver with the head seperated for multicolor printing? I already bulid the rest of the boat and it is like a rocket! Thanks!
                  • stepanmullerstepanmuller
                    2021-05-24 10:34
                    Hi, unfortunately I modeled the heads directly into the helmets and body in a way that cannot be changed without major modifications. But I think some slicers have a feature that allows painting the requested colored areas in the slicer and then using multicolor printing. Stepan
          • 3dAssetBazar3dAssetBazar
            2021-04-14 08:17
            Item Rating70
            • hhoskinanthony239
              2021-07-07 09:35
              Prints nice just got to put all the electronics in and test it soon
            • llandonl97
              2021-06-25 20:37
              I've been eying this model for a while and finally pulled the trigger. The pieces I have printed so far look great and fit together flawlessly, also the creator was very good at answering any questions I had. Excited to try the boat out once I get the rest of the parts printed and purchase parts in!
            • nnarvaezjesus17
              2021-05-29 03:41
              Excellent quality.
            • kkellegubben
              2021-04-17 09:26
            • nnarkymark
              2021-04-12 20:54
              Wow! Amazing in every aspect, I've finally printed all of the parts and everything fits together perfectly! Well worth the money in fact worth more. Can't wait to get it out on the lake. On a side note: I "think" the intake grate is mirrored in the download files. The lug is on the wrong side when it is installed as shown in the images. It's really no big deal I just mirrored in my slicer.
            M-Jet Sprint - 3D Printable RC Jetsprint Boat Model
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            The product can only be used in an editorial manner (educational, non-commercializable<br/> personal project, in newsworthy and of public interest events) and may not be used for any<br/> commercial, promotional, or merchandising purposes.<br/> <a href='/pages/terms-and-conditions#general-terms-of-licensing' rel='nofollow' target='_blank'>Read more</a>
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            3D model formats
            • Stereolithography (.stl) (2 files)-
            • PDF (.pdf) (2 files)-
            3D model details
            • Publish date2021-03-23
            • Model ID#2941615