Solar kayak - new propeller test

Why an aircraft propeller? More on that here: DIY 18V electric outboard motor. HRS 775 cordless drill motor and gearbox, APC 8“ x 4“ model aircraft propeller. First successful test with a brushless motor and new panel: Trolling motor construction video: Nearly triple the propulsive power compared to the drone prop ( ). No battery or MPPT electronics. The aim of this project is to optimise th