Mochi Craft Long Range 23 Hull

[Guido]

What's your opinion of new revolutionary Ferretti 's semidisplacement hull?
http://www.ferrettigroup.com/Linnova...S/default.aspx

http://www.motorship.com/features101...t-developments

Can we consider it a multihull? or what else?

[luff tension]

There was a highly unsuccessful yacht called Silver Bullet in Auckland which is a similar concept - one bow, two sterns and a similar tunnel arrangement - designed by Grant Firth. About 55ft.
Was often called a monomaran but was more often referred to as the silver maggot.
And did I mention it didn't work

[Guido]

Thank you for your reply.
Have you got any picture of it, fuel consumption data, boat test, ecc.?
I'm looking for information/design/experience on boat/prototype similar to Ferretti's one (better if smaller, araound 40'-50' of LOA and 15' of beam) with following features:

• semidisplacement multi "submerged" hull
• Monohull aspect
• Maximum speed about 20-22 Knots
• Average economical speed 15-18 Knots

Thank you everybody

[daiquiri]

One significant difference is that Silver Bullet was a sailboat (heel!) while Mocchi is a motorboat. I am not surprized that this concept applied to a sailboat didn't work. However, it makes sense when used on a powerboat. Wave interference is at work here imho, and it can be much better controlled and used for minimization of resistance on a constant-heel (zero heel, in this case) boat.

[jehardiman]

Looks like a structural nightmare, and I don't think it can be called "revolutionary", just another tunnel hull like a sea sled or rescue minor carried to extreme. I also think some of the add text is disingenuous about powering humps and hollows and where this hull operates compared to " classic displacement" or "planing" vessels of the same volumemetric Froude number. Personally I think they are playing with wake fraction and wheel size along with hump location, all of which can indicate improved "efficency" relative to a standard semi-displacement hull of the size (15-20m?). FWIW, transport efficency (i.e. Tonne-NM/ltr) is a better measure of a hull IMHO.