Racing Sparrow RS-850 – 3D Printable RC Sailboat | STL Set + Build Guide

Racing Sparrow RS850 – 3D Printed RC Sailboat

The Racing Sparrow RS850 is an innovative 850 mm radio controlled sailboat designed for speed, simplicity, and exciting sailing performance.

https://www.youtube.com/watch?v=gBIs4yjMOWI

Featuring a unique twin mast rig, lightweight hull, and deep keel, the RS850 delivers impressive acceleration, excellent balance, and responsive handling. The independent rigs require no stays, making setup simple and sailing great fun.

Designed and tested in New Zealand, the RS850 is easy to 3D print, affordable to build, and capable of performing in a wide range of wind conditions.

Included STL Files

5-part hull optimised for 200 × 200 × 200 mm (XYZ) print volume

Alternative solid and soft bow configurations

Deep printed keel and lead-shot filled bulb

NACA profile rudder and keel foils

Twin mast mounts and rigging fittings

Integrated internal braces and electrical tray supports

Servo tray, hatch, cabin, and deck fittings

Alternative larger rudder and cabin for bigger printers

Editable STEP file for the servo tray

Also Includes

Materials Guide: https://racingsparrow.co.nz/materials-for-racingsparrow-rs850-3d

Comprehensive Online Build Guide: https://racingsparrow.co.nz/racing-sparrow-rs850-build-guide

Lifetime file access and updates

Specifications

Hull length: 846 mm

Beam: 155 mm

Typical all-up weight: 2.24 kg

Keel depth: 420 mm (hull bottom to bulb centre of gravity)

Bulb weight: 950 g

Rig: Twin independent carbon masts, no stays

Print volume: 200 × 200 × 200 mm (XYZ)

Designed for: 2-channel radio (rudder + sail control)

Designed and tested in New Zealand.

The RS850 combines innovative yacht design with practical 3D printing, creating a fast, beautifully balanced model yacht that's straightforward to build and a pleasure to sail.

See sailing videos, photos, and community builds at https://racingsparrow.co.nz