Reply
 
Thread Tools Search this Thread
 
Old 16 June 2014, 16:23   #1
sea
Member
 
Country: Canada
Length: 3m +
Join Date: Aug 2013
Posts: 13
how do the tubes on an ocean rhib not get beat off?

I always wondered seeing vids and pictures of rhibs 7.5m plus in the ocean pounding and jumping off waves in big swells/seas. All that force that is subjected surprisingly the tubes never get beat off. I know on larger ones they are bolted not glued but still just flaps of hypalon right? what gives or should I say what gives the inherent strength of the tubes not coming loose in rough pounding seas? If someone was to stuff the bow in a big one would it survive same fate?
__________________

__________________
sea is offline   Reply With Quote
Old 16 June 2014, 17:33   #2
Member
 
Country: USA
Town: CA
Make: Zodiac RIB-P
Length: 7m +
Engine: Suzuki 250
Join Date: Aug 2010
Posts: 1,122
I got 160 reasons for you. On my boat it's 160 bolts, give or take. The hypalon flange is like 3/8 of an inch thick. I'm sure there is an engineer who can explain it better, but id bet it's something along the lines of the water not being able to apply enough force to a tube for it to detach before it either bursts or can flex enough to ride it out. I'd guess the attachment point is not the weak link

Jason
__________________

__________________
Bigtalljv is offline   Reply With Quote
Old 16 June 2014, 17:47   #3
Member
 
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
The assumption that tubes don't 'ever' separate from the hull is incorrect. There are quite a few pics of that here in various threads. The bow peels back quite dramatically and its pretty catastrophic for both the boat and crew.
__________________
captnjack is offline   Reply With Quote
Old 16 June 2014, 19:21   #4
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 captnjack View Post
The assumption that tubes don't 'ever' separate from the hull is incorrect. There are quite a few pics of that here in various threads. The bow peels back quite dramatically and its pretty catastrophic for both the boat and crew.
Indeed - some of the more 'extreme' boats have a strap that goes over the top the tube each side of the bow to prevent them being detached / stop them being ripped right back if they start to go.
__________________
Poly is offline   Reply With Quote
Old 17 June 2014, 13:14   #5
sea
Member
 
Country: Canada
Length: 3m +
Join Date: Aug 2013
Posts: 13
amazing though when you think of the abuse in rough seas/ rescues. They are certainly well engineered and tested before production.
__________________
sea is offline   Reply With Quote
Old 17 June 2014, 13:22   #6
Member
 
kubcat's Avatar
 
Country: Australia
Town: Sydney
Boat name: Lunasea
Make: Ribtec 890SX
Length: 8m +
Engine: Yamaha ME 421STI x 2
Join Date: Aug 2009
Posts: 470
I have had tubes separate on a 5m RIB. Not a good feeling considering it's what keeps the boat afloat.

Luckily I nursed it home without them becoming completely detached.

This model had them glued on.
__________________
kubcat is offline   Reply With Quote
Old 17 June 2014, 14:38   #7
Member
 
Country: UK - England
Make: Valiant
Length: 5m +
Engine: 75HP 2 Stroke
Join Date: May 2012
Posts: 59
I know someone that tore the tubes off a 4m rib all the way to the back end of the bench seat. I think they'd been sent out on a bit of a search and rescue mission for a missing flotilla yacht in a nice sunny resort somewhere abroad. Apparently it was a bit too rough for the rib and they ended up stuffing the bow into a wave a bit too hard. :S

Obviously a proper offshore rib is going to be properly engineered for that kind of stuff. This was just a titchy little rib meant for making sure that kids in Picos don't drown or get blown out to sea. :L
__________________
bad_moose is offline   Reply With Quote
Old 17 June 2014, 17:33   #8
Member
 
Country: UK - England
Town: alnwick
Make: avon
Length: 4m +
Engine: outboard
Join Date: Sep 2012
Posts: 2
I bought a 4.5 m assault from humber this December and 3 weeks ago I split the material which holds the tubes on . the repaired it under warranty
__________________

__________________
nidge 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 08:53.


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