S4#5. Hybrid Electric Engines - What THEY don't want you to know! Grande Motte Boat Show.

While interrupt our cruising on our Leopard 45 catamaran and the Portofino 52 aluminium boat build this week we travel to La Grande Motte for the Multihull Boat Show where Portofino has a stand.
The big dilemma remains regarding electric, hybrid, regen and hydro-regen with many providers telling us different things but we become aware of the risks to our boats from the hybrid designs that no-one seems to be telling us about and even when directly asked they seem to shrug shoulders and act as if it is not a big deal.... When you risk burning out your gearbox, having to change you cutlass bearing every 2 months and lose you sterndrive seals or damage your prop shaft, these need serious discussion! We also want to hear from all of you about how significant these issues really are....
We check out new innovations for sail handling, carbon fibre and GRP tenders, and give you tips on how to check the quality of the painting of any boats you are looking at and the pros and cons of wraps instead of paint....
Also meet the new owners of the future Portofino 52s and our Patreons who we share time and stories with!
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[@the_ayesha_khan]

Hey guys thanks for the vid, the OC Tender 330 in carbon (most similar to the AST is actually 39kgs

[@juergenzenner4219]

Very interesting arguments… Let see what experience the “Gone with the Wynns” with the Hybrid Electric Engine have.

[@39lp]

Only 9k views? The video and the technical discussion below are the best of any KZbin video. Really knowledgeable and helpful discussion. Much appreciated. But you have to get the view count up.

[@geniexmay562]

As usual very valuable info. Excuse me while I rewind a few times 😄👍

[@MHow1900]

Thank you for the insightful information about electric motor issues.

[@marktaylor484]

Fascinating and must have been like being a kid in a (somewhat confusing in parts) candy shop...

[@mitchellmccaffery4220]

Interesting comments about the OC Tenda I saw the Wynns try to flip one during their testing you should check out that episode they tested lots it may save you some time.

[@kimblemooney2757]

Great review of Regen issues. Systems need to be refined

[@gds6395]

Check out 'Gone with the Wynns' they have a hybrid solution with regen on their new HH44.

[@angusmcbraith]

Thanks

[@gbsailing9436]

Good morning everyone at the show. I apologise didn't recognise Rafaele without his blue spot!!

[@pageadventures]

I was interested in your comments re hydrogen via ‘normal props’. The Wynns are getting 1.5kW from each shaft.

[@geofferyrobertson6608]

hydro-regent will continue to have massive improvements in the next 10 yrs ( my thoughts only ) , cutles bearings lasting 300hrs is a fair bit plus one could easily carry a couple spare ones

[@RGF56]

Very interesting information there especially about the regen .

[@LoanwordEggcorn]

Being able to regen efficiently depends strongly on the prop design. But it also depends on system design. If the electric motor isn't connected to the prop directly it probably can't regen.

[@jackwickman2403]

The big problem in combined propulsion/regeneration systems is the propeller. It is simply not possible to optimize a propeller design for both functions. OceanVolt with their variable pitch ServoProp does better than others. A fixed pitch prop will be so compromised that it won't be good at either job. No amount of Computational Fluid Dynamics magic or salesmen's wishful thinking can overcome this. Consider that for propulsion, one side of the prop blade is high pressure, the other is low pressure. These reverse during regen with a fixed pitch prop. This makes it impossible to optimize the blade shape. Sail drive/pods that rotate 180 degrees offer slight improvement to regen, but now the prop blades trailing edge is the leading edge, so still compromised. Variable pitch improves this situation a lot, but at the cost of added complexity and money. Variable pitch that can adjust near 180 degrees can do well at both propulsion and regen. Adjusting more than 180 degrees can also improve reverse thrust. Having the motor also be a generator is not a problem. A permanent magnet motor and an alternator/generator are the same machine. The only difference is the electronic control unit connected to it. It is simple to make a combination motor/generator and they work fine. Not a problem. The big problem is the propeller. It's a hardware problem, and it can't be fixed with software.

[@user-lr4zk1to8u]

Why don’t you ask Leopard / Robertson and Caine why they are treating the owners of Utopia so abysmally! Seemingly rejecting the same claims that they accept elsewhere. Their after sales warranty can’t leave potential owners with much confidence.

[@ahminmabed5166]

Awesome show guys. I came across your channel when you were showing the Outremer 45 some years ago. I really enjoyed seeing the yachting accessories and hope to see more of what's on offer. As for electric propulsion, I've already done the math on the HH44 and quickly concluded that it's nothing more than a marketing gimmick. EP is only good for an anchor

[@lincolnlincoln27]

GOOD one!!!...... Like the exposure of the "snakeoil" of current regen tech.... at sea redundancy is mandatory IMHO..... diesel probably stil the best. have a separate regen setup to top off batteries if feasible & yield is practical..... looks like john is almost ready to do the barbary pirate thing with a braid & tar!!!!

[@seawench555]

Eli, u look absolutely stunning, John ur ok too😜Did u get me a vest an shirt, I'll pay for them, they look splash. What a fantastic vlog, so much happiness, fun and so interesting, thank u both so much for sharing all ur adventures with us. I'm soooo Excited. Oh size xl 🤣yeah another Aussie for Portofino, good on Clint. 🇦🇺 John, good call stay away from those engines please. I'm looking forward to the Hydrogen engines.