Delta R-Frame Mast

The Delta R-Frame Mast from Delta Hydrofoils takes a fundamentally different approach to foil mast design by consolidating the top plate, mast strut, and front fuselage section into a single carbon fiber component. Rather than bolting three separate parts together, the R-Frame eliminates two traditionally problematic joints — the mast-to-plate connection and the mast-to-fuselage connection — producing a unified load path from the board mounting surface down to the front wing. The rear section of the fuselage remains a separate, detachable piece, which keeps the system compatible with different fuselage lengths and allows compact packing for travel.

Delta Hydrofoils designed the R-Frame around the principle that structural rigidity translates directly into on-water stability and control. By removing bolted joints at the highest-stress transition points, the one-piece carbon layup delivers a notably stiff connection between the rider's board and the front wing. Seamless material transitions at each load point help distribute forces through the structure rather than concentrating them at fastener locations.

• Mast Length: 85 cm
• Chord: 11.5 cm
• Thickness: 1.8 cm
• Material: Carbon fiber (single-piece construction)
• Included: Integrated top plate, integrated front fuselage, 2× M8 × 25mm Torx screws
• Available Sizes: 85 cm (single length)

The R-Frame Mast suits intermediate to advanced foil riders who prioritize stiffness and direct feedback through the foil assembly. Its 85 cm length sits in the mid-range for mast heights — tall enough for comfortable clearance in moderate swell and chop, yet short enough to keep the overall setup manageable during transitions and maneuvers. Riders moving into higher-aspect front wings, where flex in the mast assembly becomes more noticeable at speed, will benefit most from the integrated construction.

Because the R-Frame is a Delta-specific platform with proprietary geometry, it is intended for use within the Delta Hydrofoils ecosystem. Riders already invested in Delta front wings, rear stabilizers, and fuselage components can adopt the R-Frame as a structural upgrade without changing their wing selection. It is less suited for beginners still experimenting across brands, since the integrated design is not cross-compatible with standard mast-plate-fuselage assemblies from other manufacturers.

Within Delta Hydrofoils' catalog, the R-Frame Mast is the standalone mast component that forms the backbone of two complete R-Frame kit options: the Progression High Aspect Series and the Performance High Aspect Series, each priced at $1,949 and bundled with front wings, stabilizers, and fuselage hardware. Buying the R-Frame Mast separately at $999 makes sense for riders who already own Delta wings and want to upgrade their mast assembly without purchasing a full kit.

The R-Frame concept competes with other integrated or one-piece mast designs in the broader foil market, such as the Axis one-piece carbon masts and similar monocoque approaches from brands like Unifoil. Where those options vary in their fuselage attachment strategy, the Delta R-Frame is distinct in incorporating the front fuselage section directly into the mast, leaving only the rear fuselage as a bolted connection.