Propeller Design
A propeller designed for your boat, not pulled off a shelf
Every design starts with a careful workup of your vessel: hull form, displacement, engine make and model, gearbox reduction and operating profile. We model blade area, pitch distribution and cup to deliver maximum thrust at the RPM the engine was built for — which is what saves fuel and extends engine life.
Deliverables include detailed CAD drawings, blade pitch and area curves, a predicted power/speed curve, and a casting/finishing plan that any competent foundry can work from.
Features & benefits
CAD-based design
Every blade is modelled in 3D before any metal is cut.
Matched to RPM
We optimise for the engine’s rated continuous output.
Fuel efficient
Correct pitch and area means less slip and less burn.
Hull-form aware
Semi-displacement, planing or displacement — the design changes.
Full documentation
Drawings, curves and build spec supplied with every design.
CNC-ready
Drawings machine-ready for high-precision casting and finishing.
Step by step, from first call to delivery
Vessel data
Hull drawings or lines, engine info, gearbox ratio, operating profile.
Modelling
3D CAD model of blade and hub, then performance simulation.
Review
You review the predicted RPM/speed/fuel curves.
Manufacture
Casting is coordinated or supplied as drawings for your preferred foundry.
Typical range & options
| Diameter range | 12″ to 60″ (standard); larger by arrangement |
|---|---|
| Blade count | 3, 4 or 5 blade |
| Materials | Manganese bronze, nickel-aluminium bronze, stainless |
| Hub options | Keyway + taper, flanged, splined |
| Lead time | 3–5 weeks typical from design freeze |
| Documentation | CAD + performance pack supplied as PDF |