I own the Alibi 54 hi-performance sailing cat DIFFERENCE. She was built in 2010 and came equipped with folding props which had two serious drawbacks: very poor performance in reverse and if allowed to freewheel, which can happen, they had a bad habit of flying open when sailing over 15 knots causing enormous vibration and drag. I would say even dangerous for a boat that can sail well over 20 kts. I recently refitted EWOL E3 to my twin 40 hp Volvos with sail drives. Theses props are awesome! Superior handling and maneuvering, easy feathering, full reverse authority and total quiet when shifting. They’re expensive, but wow, are they great.

Paul USA