Rigid Inflatable Boats

[kach22i]

Foam filled aluminum boat that looks like an RIB, but is it?

http://home.caloundra.net/~oceancraft/

[kach22i]

http://www.koldacorp.com/english/rescueboats.html

The design incorporates a modular closed-cell foam sponson

http://www.portcities.org.uk/london/...he-Thames.html

The E-class boats are built of an aluminium alloy with a closed cell foam collar or sponson.

http://www.safeboats.com/default/collar.html

The Standard SAFE Boats Collar system has been proven to stop small arms fire from penetrating the side plate of the hull. With the addition of ballistic material either behind the collar or laminated in the collar it can stop up to 7.62 mm. Test (LEFT) was performed at a 3 meter stand off and with both hard ball and jhp rounds.

[Sander Rave]

Hi guys,

sorry for bothering if I don't understand you right. Are you realy discussing the sea worthyness of RIB's like the ones with a V-hull bottom?

From experience I can tell you the smaler ones (<5meters)without fixed seats I don't trust, with bad weight distribution / fixation they can be blown over when driven too hard upwind in heavy seas.

The larger ones can be driven hard, some realy hard. The the Dutch coast rescue fleet should by now all be replaced by alu-inflateble self righting vessels:
http://www.knrm.nl/actueel/06Fotomateriaal/
on the site you can find pictures of the stabillity tests too:
http://www.knrm.nl/vlootschouw/10Type_Arie_Visser/

[Sander Rave]

Don't know if you know these ones:
http://www.zodiacmarine.com

[kach22i]

Originally Posted by Sander Rave

Hi guys,

sorry for bothering if I don't understand you right. Are you realy discussing the sea worthyness of RIB's like the ones with a V-hull bottom?

From experience I can tell you the smaler ones (<5meters)without fixed seats I don't trust, with bad weight distribution / fixation they can be blown over when driven too hard upwind in heavy seas.

The larger ones can be driven hard, some realy hard. The the Dutch coast rescue fleet should by now all be replaced by alu-inflateble self righting vessels:
http://www.knrm.nl/actueel/06Fotomateriaal/
on the site you can find pictures of the stabillity tests too:
http://www.knrm.nl/vlootschouw/10Type_Arie_Visser/

RIB's like the ones with a V-hull bottom
Yes, that's one of the types - the main type I guess.

Looking at some of the craft you have provided links to, poses a new question; When does an RIB become a just boat with an inflatable collar?

Is that all a RIB really is, a boat with an inflatable collar?

[Sander Rave]

Nope,

when you look at the smaler crafts, like a small Avon or Zodiac, the inflatable collar and the hard bottom go hand in hand. The collar (and the inflatable keel) give the panels their rigidity, who in their turn give the colar its rigidity. Push- and-pull.

The largest ones like the one above use it for stabillity and bouiancy at the least. look at the picture in this page:
http://www.knrm.nl/vlootschouw/10Typ...eanine_Parqui/
You understand it won't be this sea going as non- inflatable.
Not to mention to keep it light weight and in one piece.
The tubes consist of a couple of inner tubes. the outer tube is made of closed cell foam.

[kach22i]

Originally Posted by Sander Rave

The tubes consist of a couple of inner tubes. the outer tube is made of closed cell foam.

That is the way I am interested in the most.

See here:
http://www.special-operations-techno....cfm?DocID=607

Somewhat larger in size, Zodiac’s (9.2 meters) Hurricane 920 (H-920) cabin RIB is in use by the Coast Guard for extended patrol missions. Recent company literature refers to Zodiac’s new DuraRib II foam tube collar system. The design uses a combination of either a tough polyurethane outer coating, or neoprene Hypalon, over a hollow block of flexible closed-cell foam and an inner inflatable bladder. Program descriptions note that the “H-920 can be equipped with Zodiac’s patented DuraRIB II foam tube collar system that allows the boat to remain operational even with bullet punctures.”

[safewalrus]

Remember they are still only motorised contaceptives after all

[Wellydeckhand]

Nice Thread...........

[safewalrus]

shame you had to come and spoil it!

[Wellydeckhand]

Originally Posted by safewalrus

shame you had to come and spoil it!

IT TAKE EVIL TO KNOW EVIL ...... ......... ........

May the thread be as long as u may want......leaving for foreign land full of female walrus to expoilt........Chao.....