saraf0005
New Member
Would also say that the Normal Noblesse 655 drove well but highlighted limitations of small boat in the water around Dartmouth
Rib to sportboat
- Thread starter saraf0005
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grumpy_o_g
Well-Known Member
I've always assumed that it was because the hull is much narrower and deeper than the equivalent beam non-inflatable and that the tubes are mainly here to give it stability and buoyancy at low speed and rest (no promises that's a sensible answer).
grumpy_o_g
Well-Known Member
White Shark? I've noticed them at Cobbs before - they certainly look seaworthy and very nice with a blue hull (and that's from a raggie) http://www.finedesign-marine.co.uk/2016-white-shark-228-cabin.html
Portofino
Well-Known Member
Ah I can climb on my hobby horse
I think the most "solid technical reason " is the deep ness of the V ,ie Deadrise .There may be others happy to hear?
Rib,s have excessive deadrise ,deep at the transome, mid section ,and a fine entry @ the bow sections .
This means they can part the waves more than ride over and crash/slam down .
A simple analogy is to think of a knife and a shoe box in a test tank , moving through.One will be smooth ,t,other bouncy.
A hull is a compromise twixt the two.
The deeper the V the greater wetted area, the more friction /drag .This means more Hp is needed to push it along at a given speed ,not a problem in Outboards these days .
Another performance /planning factor is weight ,or power to weight ratio ,again hardly a problem with a pair of Yam 350 Verado,s .
So it's the plastic hull form really and the easy ability to match the power to get the right power/weight ratio .
The tubes re performance ,I think just instilled confidence in the operator .
Other small light none tubed hulls like Cap Camerat,s and White Shark , Bigger Bostan Whalers like Outrage 320 etc ,also have a high deadrise , and are outboard able , plenty of power to overcome the wetted area of the deeper V
Once you start -morphing - going down the cabin /accomodation /inboard diesel route ,dare I say it fly bridge ,then you pile on the Kg ,s
Now to get it to plane restricted by a given Hp of the inboard * ,to get lift to plane builders start to flatten the aft sections
If they prat about with the weight distribution as well -shoving the E room further astern to create the fashionable and sellable owners mid cabin ,then again to get the interior volume the mid and rear sections are flattened at the expense of ride /seakeeping .
With a rib none of this applies
* bigger inboard diesel engines cost more ,bigger tanks etc -weigh more -final price has to be competitive ,so sacrifice some deadrise in the name of lift -so we can make do with engines on the " edge "
Stats007
Well-Known Member
In addition RIB hulls are generally much thicker, fuel tanks are generally below the waterline and as there's no need to design around accommodation etc the centre of gravity and buoyancy are very low.
saraf0005
New Member
By way of closure just to say we bought an AMT 200 DC at the boat show yesterday
rafiki_
Well-Known Member
Looks fantastic. Congratulations. How about sharing some more detail please?��
MapisM
Well-Known Member
From your first post asking for suggestions to actually buying the thing in less than one month.
That's probably a forum record of some sort...
Well done, and all the best for enjoying some great time with her! :encouragement:
saraf0005
New Member
Sea trial at Sal Marine Lymington today and thoroughly enjoyed it. Will take delivery February next year
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lenten
Well-Known Member
maybe a silly question but how do you anchor it---can t see any fittings
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It's only a small boat - it has hand anchors in lockers that tie to the fore and aft cleats.
saraf0005
New Member
It has an anchor point at both fore and aft and comes with one anchor and chain. Will wait and see if worth having two for convenience
Hot Property
Well-Known Member
PalmaTarga
Well-Known Member
delete. just seen this is an 2016 post
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Thalassa76
Active Member
And no cabin at that size