Portofino
Well-Known Member
Whilst not gods gift to boating so feel free to shout me down but in my view it would take an awful lot to make a 65ft hull slam.
I had a Cranchi Endurance and god would that slam so I do know all about slamming. See a white cap - SLAM
I drive boats not to excess by a long chalk but I pick a speed and stick to it until the sea finally annoys me so much I slow down. The speed i pick is for comfort by and large, but I don't hang about. The T40, S65 and now S58 have never slammed if you exclude the 65 disappearing into a huge hole that shook the poor thing to its very core ( on my first not local trip in the boat ... ).
Fairline ( Princess and Sunseeker etc) all know what they are doing and I would not think any of them would make something that would easily slam.
I do however not understand it being slower and heavier than a S65.
I am sure an Itama can for 50 knots all day but I am with Mapsm those people are in the minority in my view. The mind who taught me was a skipper called Richard. He constantly pointed out ..... remember this is a pleasure activity!
Let's move away from how we use our own boats to the current predicament FL are in .
It's no accident the 31 knots C 18 , nor is it a prop issue .
MapishM has drawn attention to " wider chine " ---
JRudge to " all the other F L ,s " did not slam
But looking at the vid and running pay attention to the water line length , how fwds it goes .Or to turn that around it's not pointing up ,so say 2/3 or so of the hull is in the water and the fine V is cutting or starting to cut / part etc ,like you see on a Squaddie 65 vid etc --- old failine .Old fairline have good seakeeping reputation , this is NEW
I reckon it's deadrise is low 12 degrees max .Vripack and Mancini ,hmm - Dutch river SD boats and super yachts
The vertical acceleration is inversely proportionate a sq of each degree , so you will notice a diff of say 12 and 15 in the same sea , and 15 and 18 and 18 and 23 really deep V ,s
Speed
Drags a killer -- wetted area --- well if it can,t lift then it drags -- then its slow .Get it out of the water lift it then it will fly .
Shaft angle too , every angle i.e. 10 from say 13 degrees means a greater % less power lost ,or more pushing .
That's my E room bulk head vs accommodation argument .The further back you site the engines the greater the angle -- not good - it's a straight shaft ,imagine the power loss if a V drive and extra Kg ,s .
So Looking at it so far unless we get a sea trial in 1-3 M waves to prove me wrong it does not bode well .
I,am off to Genoa next week -- I,ll find out the dead rise ---- any takers of over 12 ?
Remember it's a sports cruiser with an evocative name " GTO " rest of its competitors are in 30 knot cruise ,territory-wether you like it or not . 60 ftr and shafts .
As a FB floating family caravan ,fine 25 knots for more accommodating interior --- in that sector wins hands down
But you have to wear your " sports cruiser hat ". --- take the floating caravan hat off -- you are sat in a sexy boat
As said it's need to sit just under 2000 rpm " all day " ideally 18-1900 not 2200 with mid season growth .
Last edited: