New Boat Design: "Velocity"

Excellent suggestion!
The OP's current experience is in elementary CAD, which is certainly not
sufficient to assess the viability of high-speed vessels. He needs to learn
some maths and engineering instead of talking about drawings.

Broaching whales would be fun too. (I hope we will see some during the next
America's Cup to add some interest.)

 

Leo, can you extend on this point? is the Faltinsen book a good source to read about this limitation?

 

Skin-friction is the killer.
A 70 knot, "standard" displacement catamaran would need a very large
powerplant, so there would be little weight left for fuel and cargo.

I compared cats, tris, SES and ACV in:
"Hydrodynamics of advanced high-speed sealift vessels"
http://digital.library.adelaide.edu.au/dspace/handle/2440/37729
Essentially, as a very rough guide:
cats are good up to about 50 knots;
stabilised monos (i.e. tris) aren't bad up to about 55-60 knots;
SES are better for speeds up to 75 knots, and
hovercraft are the best choice for 100+ knots.

Of course, there are all sorts of variations too, e.g. foilers, WIGs etc. you
could consider, but these are just novel ways of reducing skin-friction.

I haven't considered planing vessels becasue they can't carry much cargo
and have problems in very rough waters.

Faltinsen's book is an excellent modern reference and well worth reading.

 

Have you guys looked at the 'Atlantic Glider' website link I posted?

If not, here it is again: http://www.atlanticglider.com/


Also, here is their Facebook Page (not that any of you really care about this, but its worth showing that they are going forward with the idea)

https://www.facebook.com/GliderMarine?ref=ts&fref=ts

 

Wow. That render stinks of ********. I am willing to bet $100 that it will never result in anything. Lets define anything by anything weighing over 20 tons and going over 40 knots.

I am willing to make this bet without knowing anything else about the project or people behind it.

Edit:
- seems that Henry S does real designs and this render might be unrelated to the project. It looks suprisingly lame imo.

 

Here's some clues, a Savitsky paper on trans-Atlantic freight at 50 knots.

View attachment Savitskyreport.pdf

 

Yes, starting a Facebook page means they are really moving forward now.

Am I missing something or is this design so radical that it doesn't need a
propulsion system?

 

Okay, maybe the Facebook page wasn't so great an idea to post. But have a look at their website: its professionally-led, real, and the boat will be built.

Leo -- The craft is powered by diesel engines and 4 waterjets (2 main ones and 2 booster jets).

 

As with the Harth boat you started with, you are again arguing that the
existence of a slick web page means something will definitely happen.
They haven't even got a physical model yet, let alone a protype.
Where you see things happening, I see only cloying marketting promises and
proposals that haven't resulted in anything real and practical.

That is not apparent on the drawing you supplied.

 

Great read on the discussion about displacement, semi-planing and planing hulls. I found this interesting bit to consider

"Waterjets:
Waterjet propulsion appears to be the present day preferred propulsion system for high-speed vessels. Unfortunately, large 50 kt ocean going displacement ships require very large amounts of power to be transmitted to the waterjets for propulsion. The largest near term waterjet that is currently being designed is the KaMeWa 325 (inlet diameter = 10.7 ft) which is expected to absorb 49 MW ( 66,000 bhp). Thus for the present application, nine such waterjets, each combined with a Rolls Royce 325 turbine, will provide the required thrust. The installation of nine waterjets will be difficult but can be"



Compare that analysis to the ACTUAL current worlds fastest ship using twin hulls.

"The World’s Fastest Ship - Incat High Speed Ferry Excels"
http://www.incat.com.au/domino/inca...7F29061E7E78BBCDCA257B8E00176876?OpenDocument


"The vessel’s high speed can be attributed to the combination of Incat wave piercing catamaran design, the use of lightweight, strong marine grade aluminium, and the power produced by the two 22MW GE LM2500 gas turbines driving Wartsila LJX 1720 SR waterjets."
http://www.marinelink.com/news/dualfuel-claimed-worlds355811.aspx


"Incat’s High Speed Record

The fastest previous vessel built by Incat was Juan Patricio, delivered also to Buquebus, with a top speed at 53.8 knots. Juan Patricio was delivered in 1996 and remains in commercial service.

Francisco is the fourth Incat built vessel with service speed over 50 knots.

The past three consecutive winners of the Hales Trophy, the Transatlantic Blue Riband record for commercial passenger ships, were all built by Incat. The average speed over the 3 day (unrefueled) voyage of Incat hull 049 was 41.284 knots."

 

Leo,

You got things confused. The 'Atlantic Glider' website and the HARTH website are two completely DIFFERENT things. I showed the Atlantic Glider because it is a boat that represents best some of the HARTH concepts. Again if you look at the website the Atlantic Glider team is professional, well led, and will succeed. They are a well organized group, not 'dreamers' as the Hydrolance Corporation (owners of the HARTH design) may be.


This is what the Atlantic Glider company has told me (after asking them about the start of sea trials and record attempts):

 

They are dreamers, soon to build a prototype (yet to be built, exactly as Leo Lazauskas says "They haven't even got a physical model yet, let alone a prototype."), still dreamers (nothing wrong with that) until something is built as Leo says "real and practical."

What are your qualifications to make these assessments??

How would you have assessed the Azimut Challenger or Jet Ruban Blue if they sent you good press response emails in their design phase?

A few remarks to put your Blue Riband fantasy in perspective:

(from http://www.ssusc.org/ , a site put together to rescue the SS United States before she is sold as scrap.)

"The design of the SS United States was so innovative that the details of her construction were kept top-secret. She was the first passenger liner to be built almost entirely in drydock – safely out of the public eye."

"On her maiden voyage, the SS United States shattered the trans-Atlantic speed record in both directions. She was the first American ship in 100 years to capture the coveted Blue Riband (awarded to the fastest trans-Atlantic ocean liner). Amazingly, she still holds the record more than 60 years later."

"Since 1996, the SS United States has spent her retirement years at a dock on the Delaware River in Philadelphia. As of 2013, the ship has been in Philadelphia for 17 years – the same number of years she plied the seas."

 

It's not the concepts of Harth and this other mob I'm talking about, rather it
is your assessment that both are somehow realistic because they have slick
websites and marketting.

Here's what you served up to us before to justify that Harth claptrap...

"I believe that it can be done...otherwise they wouldn't have put the hours
of thought into it like they have to make a website and a video
demonstrating the concept. Heck, they wouldn't have formed the company
at all if they didn't know what they were doing!"

You have now shifted to the atlantic glider, which is still years away
from anything resembling reality.

I really hope that you haven't put any money into these projects.
You don't have any qualifications to assess why they are unrealistic, nor do
you seem to have taken any advice about trying some actual modelling yourself.

Why are you trying to sell this complete rubbish to us? Is it your brief?

 

Sorry I can't see any propulsion system
Joke~I know it's just render. But you can search for website of the engine manufactures, and it's easy to get the dimensions of the engines which is mentioned above. Then you'll find there's nowhere to put the giant engines and transmission system, not to mention that the bouyancy of the floating body can't hold the weight of it.
And watch this~http://fondationjacquesrougerie.fr/en/
This french guy has a foundation, which is suppoted by Institut de France. But is it possible to build his ocean skyscraper?

 

The caption of this picture on that site says "Create a new relationship between man and his natural environment": http://fondationjacquesrougerie.fr/...cslide/images/large/fond_laureat_espace_1.png