Join the official M-Jet facebook group! https://www.facebook.com/groups/623045356071128
PDF MANUAL FOR SPRINT: https://drive.google.com/file/d/1JXAqPCIegU0TW2XvNSiWBZ-T3o3yTSlP/view?usp=sharing
PDF MANUAL FOR SUPERSPRINT: https://drive.google.com/drive/folders/1f-epKNBlcqGcuJU5rGvYQleL7ayPnrRe?usp=sharing
This file package contains: Original M-Jet Sprint & Supersprint
Supersprint is the newest update, which brings the most recent M-Jet features developed by M-Jet Development and the community into a brand new design, while keeping the style of the original M-Jet Sprint.
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. All parts including the jet pump and pilots are included.
Sprint includes:
STL files for all parts of the boat, including the pump, designed to be FDM 3D printed, mostly with no supports.
STEP file of the whole boat.
Supersprint includes:
STL files for all parts of the boat, including the pump, designed to be FDM 3D printed, mostly with no supports.
STEP file of the whole boat except for the pump (the pump is only included in the STL format).
You can 3D print it and assemble it with help of the manual, links above. You need to buy all electronics, screws and other necessary parts yourself - part list is in the manual, too.
M-Jet Sprint overview
1/10 scale, 39cm hull length.
Two stage jet pump, meaning it has two impellers. 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. The M-Jet 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.
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.
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.
Update 02.08.2021: New boat stand by Landon_L was added to the Mods_for_M-Jet_Sprint folder. Thanks for sharing!
Update 10.08.2021: New bilge pump mod by Landon_L was added to the Mods_for_M-Jet_Sprint folder. Thanks!
Update 14.9.2021: New single blade impeller design mod was added to the Mods_for_M-Jet_Sprint folder. This impeller design was not tested on this pump yet, but was found to dramatically improve efficiency on a different pump. Feel free to try it and leave feedback!
Update 06.05.2022: New extended long ride plate mod by Landon_L was added to the Mods_for_M-Jet_Sprint folder. Thanks for sharing!
Update 31.07.2022: New thicker hull with bilge pump by Justin Janes was added to the Mods_for_M-Jet_Sprint folder. Thanks for sharing!
Update 13.8.2022 Thanks to Macandnews, we now have a manual in French language! Thanks for your work.
Update 23.8.2022 New longer hull for bigger motor or battery by Justin Janes was added to the Mods_for_M-Jet_Sprint folder, thanks again!
Update 18.11.2022 Modified steering rod for thicker servo arm was added into the Mods_for_M-Jet_Sprint folder.
Update 04.03.2023 Pilots with separate heads for easier painting were added into the Mods_for_M-Jet_Sprint folder.
Update 20.03.2023 Pilots with separate heads, as well as separate rollcage piece, were added into the Mods_for_M-Jet_Sprint folder.
Fix 18.04.2023 Some users reported missing mods in the mods folder. The latest version of the mod folder Mods_for_M-Jet_Sprint_18.4.2023.zip was uploaded to ensure proper function.
Update 03.06.2023 STEP file of the whole boat was added into a new folder M-Jet_Sprint_STEP_file.
Update 27.06.2023 Modified version of the longer cover by Jeff Jackson was added into the mods folder. A steering rod for a TRX servo by KpopRC was added as well. Thanks for sharing!
Update 14.09.2023 A new ride plate mod by Alexander Binninger was added into the mods folder. There are now 3 different ways to use a ride plate, all reorganized in a Ride plate mods subfolder. Thanks for sharing!
Update 18.09.2023 A new txt file FAQ_M-Jet_Sprint with answers to frequently asked questions was added to the files.
Update 19.09.2023 Thanks to the help of Andrew Westrop and Daniel Chapman, steps were made to fix an error with the cover lid size in the Longer hull mod. There are now two versions of the lid for the standard and bilge pump hull version, which should work better than before.
Update 27.11.2023 A paint handle by Dana Hager for holding the hull during painting was added to the mod folder. Thanks for sharing!
Update 04.02.2024 A new improved long ride plate mod by Peter Maurits was added into the mods folder, thanks for your design!
Update 12.02.2024 Two versions of a front bumper were added into the mods folder.
Update 12.02.2024 (new) Multiple versions of a hull with turn fins by Peter Maurits was added into the mods folder. Thanks again for your great work.
Update 13.02.2024 A new ride plate version by Peter Maurits for the thicker hull was added into the mods folder, thanks.
Update 12.03.2024 Supersprint V0 was uploaded.
Update 14.03.2024 Supersprint V0.1: A quick small patch. An issue with too low wall thickness on hull middle in front left part of the lid interface was fixed - thanks San Xu for reporting this. An instruction about ESC placement was added into the manual.
Update 17.03.2024 Supersprint V0.2: Some more information was added into the manual, part list and the drawing. Length of the flat spot on the driveshaft in the motor coupler area was slightly decreased.
Update 20.03.2024 Supersprint V0.3: Slot for a third threaded insert for an option to adjust the ride plate was added onto the pump based on suggestion by Ryan Frair. 3 new ride plates with a hole for a third screw were added. The default tolerance on the main bearing in Hull rear was slightly decreased for a tighter fit. After a discussion with Justin Wombwell, a tolerance mod for tighter tolerances on both seals and both bearings was added into the MODS folder. Also, based on a feedback from Justin Wombwell, the TPU lid corner was extended for better grip. Tiny changes to file naming and part list were performed. Thanks everyone for your feedback!
Update 26.03.2024: Upon a request, a single piece hull STL was added into the hull folder. Furthermore, the motor KV chart was modified based on measurements of the Supersprint's pump. Maximum recommended KV for 3650 and 3660 motors was decreased. Recommendations of battery capacity were added. The STEP file was renamed to match the version V0.3 but there are no changes to it.
Update 21.04.2024: Supersprint V0.4: Optimisation of the pump is finished with the optimised impeller. Improved Lid_base geometry thanks to suggestion by Lenny B - thanks for your contribution!
Update 29.04.2024: A 3D printable watercooling jacket for 36xx motors designed and kindly shared by Lenny B was added into the MODS folder in Supersprint V0.4. Thanks for sharing!
Update 15.05.2024: A note about TPU Lid hardness was added into the Supersprint manual and Supersprint part list. The TPU hardness should not exceed 40D / 85A to generate proper seal of the lid.
Update 19.05.2024: A long bumper for the Sprint was added into the Mods_for_M-Jet_Sprint folder, front bumper.
