E-foil Propeller Design
Shape an e-foil or foil-assist propeller around its drive interface and operating point. PropShaper combines a live 3D model with editable blade geometry, water analysis and CAD export.
Start from your motor and battery
Quick design, the default panel, asks for motor kV, battery cells and capacity, the current limit, rider and board weight, cruise speed, foil type and the largest prop the drive allows. It picks diameter, pitch and blade count, checks thrust, takeoff thrust, current, cavitation and tip speed, and puts the blade on your drive hub, such as the 65161 pin-and-slot interface. Every result stays editable.
Start with diameter and drive fit
The E-foil workspace offers 130 mm foil-assist and 145 mm or 161 mm e-foil starting points. These are editable design defaults, not copies of a commercial propeller. Diameter and pitch display in millimeters. Check bore, drive pin, hub height and the fit notes for the selected interface before making hardware.
Shape the blade and check the operating point
Edit chord, twist, thickness, skew and rake through the Curves panel. Root and tip sections can use parametric contours or the foil.tools catalog. Under Analysis, set RPM and shaft depth, then inspect thrust, power, root loading and cavitation-related readouts. The water model is not a cavitation simulation or a substitute for a measured drive test.
Export a prototype
Export the propeller as an STL mesh or a STEP solid. An optional duct exports as a separate part. Toroidal blades currently support STL rather than STEP. Confirm the selected rotation and hub dimensions; a model that fits on screen has not established physical fit or safe operating speed.
Fit your motor
Browse the hub standards: bore, bolt pattern and pin dimensions for common drone, RC, e-foil and trolling motor mounts, with sources.
Understand the calculations
Read the geometry, performance and export methods for assumptions and validation, or use the propeller analysis API.