Reply
 
Thread Tools Search this Thread
 
Old 04 September 2011, 16:20   #1
Member
 
Country: UK - England
Town: Hindhead
Make: Cobra
Length: 7m +
Engine: 300hp Yamaha
Join Date: Sep 2011
Posts: 3
What is the point of the tubes?

When RIBS first came out, the boats sat in the water floating using the tubes. On modern RIBs the tubes hardly touch the water, and in some cases don't at all, so what are they there for? I don't mean to be controversial, I just am interested to know. Are they lighter than all-rigid boats?
__________________

__________________
GeorgeR is offline   Reply With Quote
Old 04 September 2011, 16:25   #2
Member
 
Country: UK - Channel Islands
Town: Jersey
Boat name: Archangel
Make: Ribcraft
Length: 6m +
Engine: ETec 225
MMSI: 235063789
Join Date: Sep 2008
Posts: 1,005
They add to the buoyancy and stability of the boat, useful in these sort of conditions:

__________________

__________________
www.flickr.com/photos/gj0kyz
GJ0KYZ is offline   Reply With Quote
Old 04 September 2011, 16:56   #3
Member
 
Bigmuz7's Avatar
 
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,068
Good Vid .. was waiting to see the end of that but it cut off
__________________
Bigmuz7 is offline   Reply With Quote
Old 04 September 2011, 17:59   #4
Member
 
Country: UK - England
Town: Hindhead
Make: Cobra
Length: 7m +
Engine: 300hp Yamaha
Join Date: Sep 2011
Posts: 3
That is a great clip. And I suppose if the Navy use them, they must be better than all-rigid hulls.

I would be interested to hear if you or others have used performance boats of each type (rib vs all-rigid) in lumpy conditions at speed, and have first hand experience of the comparison. I have a rib now, but am thinking of moving to something with sides instead of tubes. Sacrilege, persuade me out of it!
__________________
GeorgeR is offline   Reply With Quote
Old 04 September 2011, 18:07   #5
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: 10,114
Quote:
Originally Posted by GeorgeR View Post
When RIBS first came out, the boats sat in the water floating using the tubes. On modern RIBs the tubes hardly touch the water, and in some cases don't at all, so what are they there for? I don't mean to be controversial, I just am interested to know. Are they lighter than all-rigid boats?
the topic has been discussed many times before. there are pro's and con's to both approaches...
__________________
Poly is offline   Reply With Quote
Old 05 September 2011, 03:39   #6
Member
 
Country: Other
Town: Rosas
Boat name: Conqueror
Make: Valiant
Length: 7m +
Engine: Outboard 150hp Merc
Join Date: Dec 2010
Posts: 541
Send a message via Skype™ to Courageous
Not RIB related but equally impressive!

__________________
Courageous is offline   Reply With Quote
Old 05 September 2011, 04:04   #7
Member
 
Country: UK - England
Town: Plymouth
Boat name: 2XS
Make: Halmatic Pacific 24
Length: 7m +
Engine: 135hp Honda X2
Join Date: Jan 2004
Posts: 509
saves putting fenders out when towing yachts
__________________
Ian A

www.austinmarine.co.uk
Ian Austin is offline   Reply With Quote
Old 05 September 2011, 05:26   #8
Member
 
TomLinley's Avatar
 
Country: UK - England
Town: London/Devon
Make: Linley Swan /Ribeye
Length: 6m +
Engine: Yamaha F150
Join Date: Mar 2011
Posts: 113
You have to remember also that alot of the commerical boats with tubes that are very high are designed for heavy pay loads, once they are at there capacity they then sit in the water at a better level.

Most performance RIBs are just shy of the water as to not create drag once up and running, however this can make some craft unstable and rock from side to side at rest, I personally think it is perfect to have the aft section of the tubes either just above or just touching the water for stability at rest, then if you have a hull with good lift for the tubes to ride just above the water when planning.

However then you get into the situation where some dont like the tubes to touch, as they may keep the boat on a mooring and not want the tubes to get grubby etc so really it is down to your personal choice and what you prefer.
__________________
TomLinley is offline   Reply With Quote
Old 05 September 2011, 07:55   #9
Member
 
Country: Other
Town: Rosas
Boat name: Conqueror
Make: Valiant
Length: 7m +
Engine: Outboard 150hp Merc
Join Date: Dec 2010
Posts: 541
Send a message via Skype™ to Courageous
The rear of my Valiant touch the water and I must admit the grime and growth on the mooring is a bit of a pain......

Is there a proprietary anti foul for ribs?
__________________
Courageous is offline   Reply With Quote
Old 05 September 2011, 08:08   #10
Member
 
Zodiac Spindrift's Avatar
 
Country: UK - Scotland
Town: Kinross
Boat name: Spindrift
Make: Zodiac Futura FR Mk2
Length: 4m +
Engine: 20hp two stroke Yam
Join Date: Jul 2011
Posts: 57
The nice thing about the inflatable tubes is that they deform nicely absorbing the shock should you get things wrong, particularly at speed in a following sea.
__________________

__________________
Zodiac Spindrift 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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 14:08.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.