Reply
 
Thread Tools Search this Thread
 
Old 20 December 2005, 14:10   #11
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by MadMat
In that case, what's the point of having em. Might as well have a hard boat.
Not at all - think about it - what would you rather hit if you fell off a building - a big squashy thing or a big hard thing.........
__________________

__________________
codprawn is offline   Reply With Quote
Old 20 December 2005, 14:11   #12
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 9,454
why not fill with foam?

Quote:
Originally Posted by codprawn
Also there is less bouyency with anything other than air.
I doubt that is a real concern. The benefit of permanent bouyancy probably outweighs the very slight increase in volume required to achive the same bouyancy (or the marginal loss in bouyancy from the same volume filled with foam instead of air).

But I think the disadvantage is that most foams - even closed cell foams - eventually start to soak up some water if there is any leak and drying it out is a nightmare.

Thanks,

Neil
__________________
Poly is offline   Reply With Quote
Old 20 December 2005, 14:24   #13
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,860
Quote:
Originally Posted by Madmat
..... they're almost useless against, for example, a stuff - unless you're prepared to pump your tubes up over 70psi.
Depends on the boat and tube shape because you are ignoring the fact that the direction of the water flow is altered and the angle of attack of the tube is significant in preventing the bow going down in the first place. Also, in proper ribs, the shape of the hull will be designed with the tubes in mind and the two can work in harmony. This is in contrast to a hard boat hull with toobs stuck on.

The pics below may give you some indication of what I'm blethering about. You'd have a bit of a job getting that lot to submerge. I've never stuffed my bow but I have often had a big wall of water issuing outwards from a semi-submerged tube. The tubes flexed inward but they never were squeezed to collapse. That doesn't mean I believe the thing is unstuffable, of course.
Attached Thumbnails
Click image for larger version

Name:	Humber bow 1 x640.jpg
Views:	80
Size:	82.4 KB
ID:	16509   Click image for larger version

Name:	Humber bow 2 x640.jpg
Views:	84
Size:	48.8 KB
ID:	16510  
__________________
JW.
jwalker is offline   Reply With Quote
Old 20 December 2005, 14:35   #14
Member
 
Country: USA
Boat name: The Boot
Make: Avon SR5.4
Length: 5m +
Engine: Suzuki DF70
Join Date: Aug 2005
Posts: 270
stability at rest- Mines a Searider so even more so since it sinks in. I don't get sinusoidal rocking like a hardboat would.

keeping the boat level when traveling across the chop in the channel. The tubes really absorb alot of wave impact keeping the boat more level than an equivalent size hardboat.

buoyancey safety factor.

Simplicity of maintainance: tubes won't fill with water like foam. If its leaking you will know soon enough and fix it.

I also think the fact that it has tubes allows the hull to be a complete V throughout giving the specific characteristics of a rib at such a small size. The V hull for on the go, the tubes for keeping stable in chop and while at rest. The tubes complement the v hull and vice versa.
__________________
boatster_sr4 is offline   Reply With Quote
Old 21 December 2005, 03:57   #15
Member
 
Country: UK - England
Town: Binfield
Boat name: merlinless now
Length: no boat
Join Date: Jul 2004
Posts: 447
Ribs, will provide you with Stability and Buoyancy they also have good load bearing capacity. I think thatís why people are beginning to go for cabin ribs over hardboats, we intent to do so,,,if we can find the right one
__________________
Jimbob is offline   Reply With Quote
Old 21 December 2005, 04:03   #16
Member
 
Pete7's Avatar
 
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,837
Toobs mean you don't have to polish all that fibre glass, so can go out and use it more often. Just look at all those speed boats sat in harbours never being used

Pete
__________________
.
Ribnet is best viewed on a computer of some sort
Pete7 is offline   Reply With Quote
Old 21 December 2005, 04:14   #17
Member
 
Country: UK - England
Town: Farnborough
Boat name: Eleven
Make: Arrow
Length: 8m +
Engine: 557cu, 700hp
Join Date: Jul 2003
Posts: 1,255
Ah, but less polishing time merely means you have more ole drilling and console changing time.
__________________
Matt is offline   Reply With Quote
Old 21 December 2005, 05:00   #18
Member
 
Pete7's Avatar
 
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,837
lol, 15 all
__________________
.
Ribnet is best viewed on a computer of some sort
Pete7 is offline   Reply With Quote
Old 21 December 2005, 05:19   #19
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,538
I'd like to take this opportunity to point out that we will be stocking a new and exiting range of Cleaning materials in our chandlery at Drivers Worf.

It's called 606 and it's twice as fkkn good as anything with a three in it


I have always though of toobs as outriders really and I think they are kinder to you when you hook than a hard boat, but they do reduce speed!
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote
Old 21 December 2005, 05:31   #20
Member
 
Country: UK - England
Town: Farnborough
Boat name: Eleven
Make: Arrow
Length: 8m +
Engine: 557cu, 700hp
Join Date: Jul 2003
Posts: 1,255
Scratcher, do you have a space heater in your shed?
__________________

__________________
Matt is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 00:41.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.