Glad you enjoyed it!

It exceeded all my expectations. Thanks again. I am just going through the yachts on Heeson’s KZfaq channel now and they have some beautiful yachts. They’re clearly a high performance yacht builder.

I had the same thought re windows... Guess I'll have to order those on my next and first custom blue water! ; )

😂😂😂. Don’t get me started on “basil” and “tomato”!

@@Yachtsforsaleblog Or "Gigayacht" and "jigayacht." :P

Americans use *aluminum* and Brits use *alumin i um.* ;)

@@Yachtsforsaleblog Or "nuclear" vs "nucular", or "Van Gough" vs "Van Go". Or directly relevantly for yachting... "coupé" vs "coop".

*cough* zed *cough*

Hi Arno, yes...I do a few collaborations with Benetti. I completely agree with you, everybody should allow comments on KZfaq channels, it's great for engagement.

As far as i know Heesen doesn't want to work with composites due to environmental reasons.

My guess would be that if you build using a steel frame, you could go as big as you like with either material...

Hummmm, I thought they answered that question very well.

Someone did :)

aluminium. it is not aluminum

Diesel Electric is great for range and low emissions, but they tend to be very slow. If you want a 20 knot + yacht then diesel electric is not a good solution. Also, due to the size and weight of batteries most diesel electric yachts tend to be at least 150' in length.

As a chemistry student I think I can help answer the first two questions: Classical Diesel engines will be better in the combination of both speed and range and probably even if you focus on just one of the two than electric Diesel propulsion (DEP). Let’s assume of course we talk about identical hulls and only vary the type of propulsion. Looking at range first the reason being that in order of transforming Diesel to thrust in a traditional Diesel engine boat lost energy occurs in the form of heat. This happens at the engine, whereas in a DEP system lost occurs twice; once when the Diesel is translated to electricity (try touching a Dynamo after your next nightly bicycle ride) and again when the electric engine converts that into thrust. In other words you would need to plan more room to accommodate enough Diesel and Battery’s which makes the boat heavier which affects the range. In regards of speed I’d assume the same laws of physics apply as in cars: a Tesla is immensely quick to get to 100km/h and even a little further but the ideal cruising speed is, despite its good aerodynamics, lower than that of a Diesel Mercedes. Putting that into the water it might be possible that a DEP accelerates quicker but at higher speeds the range will be gravely reduced compared to a classic Diesel Engine who will reach the same top speed, depending on the engine that is, but will likely be able to hold that speed for longer.

@@Yachtsforsaleblog i see. they are two different type of uses for each. lol it's funny how specific the yacht industry is, depending on what you need.

@@arno9711 i appreciate the input 😊

If you have a planing boat (not sure about semi-planing big yacht) where your two humps of max efficiency are at idle and 80% max power, it wouldn't help. I assume you are talking about a system where little to none is stored in a battery - but rather the motors and shafts are connected by electric generators, electric motors, and wiring, and not driveshafts. With a top efficiency motor of 98%, and top transformer efficiency of say 96 or 97%, and back to the generator, you are down at least 10% from the transfer, versus a 3% loss from a gear set or universal drive, right angle gear (like in a pod drive), or whatever. But the great benefit can come if you are interested in speeds beyond just the "one best speed". If you normally run at 60% load in a displacement load, but want to run at half that load... a diesel at 30% load is WAY off it's peak efficiency load, so instead with diesel electric you turn off one diesel completely and run both electric motors from one diesel, which is then back at a more efficient 60%. The gain from that optimal load with outweigh the loss in the electrical.... but look at how much more expensive your engine room has become! And you can't repair electric generators/motors in the middle of the ocean, so unless you have space to carry spares there are a lot more failure points. The other reason you do it is when your number of shafts and the number of diesels you need aren't equal... if you want one shaft and two motors, or two shafts and 3 or 4 motors or whatever. Like a big cruise ship will usually have 4 or 5 motors - two for electricity and two for propulsion and they rotate using 4 of the 5 motors so one can be under service/inspection while underway. The reason you might want one screw and two motors is because you don't care about draft and want one hug center screw protected by the keel for efficiency, or you might want two screws to either side of the keel to reduce your draft, if you need that...

@@Sidowse thanks for the detailed and understandable response. Your view of all aluminium yachts now makes more sense.

I wonder... titanium is a very tough metal, which I would think would be important for a hull. Not sure where it is on the galvanic scale and if it could be protected by normal methods. Actually - now that I think about it, aren't navy subs titanium??? Good point.

If you wear willing to spend a lot more money for the Titanium then sure why not .

or plaining hulls

Azimut grande s10.One light hit and sinks,just like a supercar againts a wall at 10 km h.

@@123OGNIAN Carbon Fibre is stronger than steel, maybe supercars are made of tin

Hi Paul, Steel is a much heavier material. It's the same reason that my 60Kg colleague Ed beats me at gokart racing.

Cost.

Only Americans say aluminum, the rest of the world says aluminium.

In Germany we Saint Aluminium.... Yes Yes Yes so.sorry we are not the rest...

Lol

I have only information from my reading, but my understanding is that since both hull materials require annual haul-out and bottom anti-fouling paint, that the cost of that must be at least 90-95% of the cost of corrosion / barnacle hull maintenance costs... so the different can't be more than a few percent.

I think we spell it differently too!