This extra large impeller provides a noise free speed signal, by locating spinner out of boundary layer – away from the turbulence created by the hull.
This impeller is designed for temporary analytical use. It is ideal for measuring the stroke velocity profile – how the boat speed varies through the stroke and how much the boat slows down on the recovery. It is fitted to boat using duct tape. Its size positions spinner 75mm from hull – compared to around 20mm for a standard sized impeller.
The impeller should be mounted as near the bow as practicable. Contact us if you require guidance.