I've bought two watt and sea generators. On its first sea trial from Curaçao to Colon, with just one hydro generator installed I had had all three blades on the prop fold over at not more than 7 knots (we are talking a 42e Hallberg rassy). At this stage I was thinking it must be my fault. Anyways I changed the prop out with a spare I'd wisely purchased.
Well at not more than 6 nts same thing. I couldn't believe it, I thought I'd done something fundamentally wrong in mounting or placement etc. but I asked all the questions? Nothing wrong, the distributor started to blame my mistreatment and/or technique. At the end of the day the watt and sea people replaced these two props and was then informed by word of mouth from distributor that it was a fault plastics issue. I asked them to do a recall
but they would not. No goodwill gesture either, they are French witch often mean belligerent. But what about the people out there who may have defective ones as spares.
I bought the aluminium prop at 600$ or thereabouts as my last defense. I've also had problems with the correct configaration for lithium batteries of their regulators, they promise, no deliver. The method to raise and lower really does have to be engineered by the purchaser or paid help as well. I've had a bit of trial and error, improved but not really satisfactory.
What really annoys me though is they marketed a product that was good enough for the global racers, but all I had was pricy product that failed really quickly. If this had happen halfway across the pacific I think I'd be considering legal
I really like the concept
but it needs to be engineered by Germany
or Japanese rather than the French.
I have photos of these props on another device and will endeavor to post these shortly
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using Cruisers Sailing Forum