Alioth has been designed by RC Sailing Lab to be manufactured using 3D printing technology.
The project gathered the experience of the lead project designer Juan Egea, who contributed with his extensive experience in the IOM Class and the design team, who worked exhaustively in achieving modern, functional and harmonic shapes.
The purpose is to put on the water a 3D printed IOM hull, easy to assemble at home, and at a low price, capable of winning races at the highest level.
Alioth was launched in December 2020. Thanks to the early Alioth owners and the design team, several upgrades have been made to both the hull shape and the 3D printing files. Alioth V4 is the most recent version and it was released in March 2025.
FOR HOME 3D PRINTERS
For FFF/FDM printers with 210 x 210 x 250 mm build volume or larger.
EASY ASSEMBLY
All hull sections and internals are designed and tested for easy assembly.
FAST MODERN DESIGN
The design team worked exhaustively in achieving modern, functional and harmonic shapes.
Users
More than 380 Alioth licensed users worldwide.
Countries
Countries ranked by number of licensed users: GBR-112 USA-50 AUS-47 SWE-25 FRA-22 ESP-16 NZL-14 ITA-11 GER-9 FIN-9 POR-7 DEN-7 POL-7 CAN-6 CHN-6 BRA-5 CRO-5 NED-4 HUN-4 CHI-3 SIN-2 SUI-2 NOR-2 JPN-2 RUS-1 MLT-1 EST-1 MNE-1 IRL-1 MTQ-1 BEL-1
RESULTS
1st ESP Cup Championship 2025 . Full results
1st ESP Championship 2025 . Full results
2nd ESP Championship 2024 Full results
1st and 2nd IOM UNICORN OPEN MEETING 2024 (GBR) Full results.
9th European Championship 2023. Full results.
6th Torrevieja International Meeting 2023. Full results.
3rd ESP Championship 2023. Full results.
1st BRA Championship 2022.
4th ESP Championship 2022. Full results.
8th Torrevieja International Meeting 2022. Full results.
1st Encontro Sul-Brasilero 2022. Full results.
7th ESP Championship 2021. Full results.
1st Andalucia Champiosnship 2021 day 1. Full results.
7th Torrevieja International Meeting 2021. Full results.
WHERE TO BUY
3DP FILES
You can purchase the G-Code files through the RC Sailing Lab store.
3D PRINTED KIT
If you don´t have a 3D printer but would like to build an Alioth, 3D printed kits are available for that purpose. See Licensed Alioth Factories.
ALIOTH APPENDAGES
Licensed Alioth Factories are able to sell the carbon fin, rudder, and bulb, designed for the Alioth hull.
LICENCES
USER
The User License is included when purchasing a 3D Printed Kit from any of the Licensed Factories.
You get access to the guides, repository 3D, and all products related to the boat, as well as special prices on promo products.
MAKER
The Maker License is included when purchasing the Gcode FIles. You can print the files as many times as you like for your own use, not for commercial use, nor for third parties.
You get access to the guides, repository 3D, and all products related to the boat, as well as special prices on promo products.
FACTORY
Licensed Factories are able to print and sell 3D Printed Kits as well as their accessories.
List of Licensed Factories.
If you are seriously interested in being a Factory send us an email to info@rcsailinglab.com
WHAT IS HAPPENING IN THE ALIOTH COMMUNITY?
Facebook Group
Forum
Get troubleshooting support from the community and help identify bugs for the development team
RC Sailing Lab Forum
Troubleshooting
FREQUENTLY ASKED QUESTIONS & ANSWERS
Does Alioth design cumply with the IOM class rules?
Yes. Although the design has not been on the market for a long time, there are already some that have been registered with measurement certificate.
I am interested in home build an Alioth yacht but I don´t have a 3D printer.
If you don´t have a 3D printer but would like to build an Alioth, 3D printed kits are available for that purpose.
I´ m thinking of purchasing a printer, which one would you recommend for a nice finish?
Most popular low price printers are good to print PLA material if they are well calibrated and work in a suitable place away from drafts or vibrations.
Make sure the build volume is 210x210x250 mm or larger.
Typically, you need to spend some time understanding and calibrating a 3D printer.
What material do you recommend to print the Alioth files?
PLA+ is stiff, has low shrinkage and is easy to print. The disadvantage is a low glass transition temperature.
Darker colours warp on direct sunlight as the temperature of the surface builds up fast. To avoid this, use bright clear colours.
Don’t leave printed parts in a car on hot summer days, as the temperature can easily rise above 50°C.
Is the hull designed to be printed in vase mode?
Yes. Vase mode guarantees good layer adhesion and the best surface quality, and it reduces a lot the printing time.
What sailwinch servos can I use?
Files include three different servo trays for:
- Standard size (40×20 mm) sailwinch servos, like DSNA SW22HV.
- S100 sailwinch.
- RMG and ARS808 sailwinch servos.
GALLERY
YOUTUBE VIDEOS
ALIOTH ESP-190, white 3D printed hull
ALIOTH ESP-90, green 3D printed hull.