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How to attach parallel hybrid to prop shaft


 

We have a power cat with twin diesels. Rather than going electric only, or serial hybrid, we are thinking of at least starting by keeping the diesels and going forward as a parallel hybrid.

The parallel hybrid would have a new electric motor to a speed reduction unit (two differently sized pulleys), then by a belt to a wheel attached to the prop shaft. The attachment would be after the gearbox-engine, as our gearbox can freewheel safely and the diesel would be out of gear.

We may start with a Thunderstruck 10kW kit or something similar.

However, I can't see how to connect the electric motor to the prop shaft. Obviously a wheel (what do you call it - pulley?!) to run the belt on, tightly locked on the prop shaft (ours is 40mm). Preferably using a split collar to reduce maintenance cost (haulouts).

Does anyone know any solutions?