These mast spreaders are designed for radio-controlled sailboats. They help maintain the correct angle of the shrouds by pushing them away from the mast, improving rig stability and sail performance.

This model includes two matching spreaders (one pair) ready to print.

Features

• Lightweight design
• Aerodynamic tapered profile
• Pre-drilled mounting holes
• Large centre mounting hole
• Easy to print with no supports required
• Suitable for PETG, ASA, ABS or PLA

Dimensions

• Overall Length: 210 mm
• Maximum Width: 25 mm
• Thickness: 10 mm
• Centre Hole: 10 mm
• Outer Hole Diameter: 4 mm

Recommended Filament

Best Choice ⭐

PETG

• Strong
• UV resistant
• Slight flexibility
• Ideal for marine environments

Premium Option

ASA

• Excellent UV resistance
• Great for permanent outdoor use

PLA

Suitable for testing or display models but not recommended for boats left in the sun.

Print Settings

• Layer Height: 0.20 mm
• Walls: 4
• Infill: 40–60%
• Supports: None
• Brim: Optional
• Orientation: Print flat on the bed

Applications

Suitable for:

• RC Trimarans
• RC Catamarans
• RC Sailboats
• Custom sailing projects
• Scratch-built yachts

Notes

These spreaders were designed for my own RC trimaran project after testing different designs. They are intended to provide a strong yet lightweight solution that can be easily modified for different mast sizes.

Feel free to remix or scale them to suit your own build.

Included Files

• Left Spreader
• Right Spreader
• STL Format