building a rib

pop · 18 March 2006, 19:21

my brother and i want to build a rib we have a small boatyard in the north of new zealand we just do anti fouling, general boat building,fibre-glassing etc etc. we are going to build a 8-10m rib, a commercial rib much like the ocean dynamics or redbay, with twin engines. the rib would be used as a volunteer life boat for the bay of islands and needs to be able to take on heavy weather. what other heavy duty ribs would you look at to get inspirtion. all opinions would be great

donutsina911 · 18 March 2006, 19:37

rayglass protector.

Petrov · 18 March 2006, 20:06

Ring Powercraft

pop · 18 March 2006, 20:32

rayglass are not what i was thinking they are a little pretty. they have a good hull but they are a little close to home i think being built in auckland. and they dont like to fit hamilton jets in there ribs, which i like.

ring are a great racing rib but they are a little light weight for what i want. i looked at the ring hull and was not that impressed. however they definately have the speed

what about the big deltas,humbers etc. have a look at this http://www.woodymarinefabrication.co...iad/custom.htm this is what i want, the 12m but make it as a 10m. is there any good rib manufacturers in the netherlands ? i was there and saw a great rib but i was sailing the other way and am still trying to find out what it was.

Alice · 18 March 2006, 20:45

You'll find Jardon Marine, Surrey, England very helpful and forthcoming with advice.

Petrov · 18 March 2006, 20:51

Quote:

light weight

A 10,5m (3,05m beam) with console, seatings and tanks is 2,000 kg (ex electronics and engines), only tubes and hull is 1,320 kg.

pop · 18 March 2006, 21:09

i have not been out on a 10m ring so i can not say what they are like at that size. however we are looking at building a rib that weighs in at between 6,500- 8,000 kgs when its all done, the ring 10.5 weighs in at 4,000 odd kgs at the end with all engines etc etc. plus the bow is quite low and doesn't suit the weather conditions, and i dont need all the speed of a ring. i need a rib that does 30-40 knt max but can sustain 25-30 in all weather conditions.

Petrov · 18 March 2006, 21:24

Will you have a cabin on it or are you talking open boat, 8 tons on a 10m, thats 800kg per meter in a open boat, for me it wouldnt be any advantages in the ruff seas at a speed of 30 knots, than i would go for a longer waterline instead.

Quote:

plus the bow is quite low

You are right, maybe to low

Petrov · 18 March 2006, 21:28

You also have Halmatic Cabin and Halmatic open, MST, TP Marine in Holland, Boomeranger in Finland, Rupert Marine in Sweden

pop · 18 March 2006, 21:40

the rib must have a cabin not for sleeping but a space for a stretcher and have seating for 6. the halmatic is a nice rib have you been in one? what are they like? do they have a outside helm ? what do you think is best fibreglass or aluminium ribs?

Petrov · 18 March 2006, 21:49

Quote:

the halmatic is a nice rib have you been in one? what are they like?

Only couple of times but its some years ago, heavy duty, not very fast, absolutely a boat for what they are build for.

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do they have a outside helm

Dont know but it would suprice me if they cant make it.

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what do you think is best fibreglass or aluminium ribs?

Cant tell, lots of ribs are made for different purposes so it depends of what they will be used for.

pop · 18 March 2006, 22:10

i will have to put jet drives in it so that she can go up creeks and on beaches. i would prefer to build the rib out of fiberglass i can do it myself. i like the halmatic rib but somthing in between that and the ocean dynamic rib worker 40 rib . have you been on the ocean dynamics?

Petrov · 18 March 2006, 22:17

Quote:

have you been on the ocean dynamics?

I have been on one but not driving it so i dont know how they handle but they look really heavy duty.

pop · 18 March 2006, 22:25

aren't they all fitted with hamilton jets in ? there factory is big and busy so they cant be bad. the rib is essential to the diving safty in this area, and will have a low easy access on the sturn. the ribworker has the cabin quite far forward, this would give extra space to build this in. whats the sturn on the halmatic like? is it a self draining transom or not ?

Petrov · 18 March 2006, 22:30

They are definetly not bad, i have seen them with outboards and sterndrives but when it comes to details i think there is better persons to talk to than me.

pop · 18 March 2006, 22:35

ok thanks for the web sites ill have a look at them in detail. if anyone knows about ocean dynamics or any rescue ribs out there i would like to here more info. thanks

pop · 19 March 2006, 10:48

after talking to my brother about the rib we are thinking a 10m rib based on the ocean dymanic with a wheel house seating for 6. the rib would be built out of fiberglass with ham jet drives in it. has anyone tryed getting a jet rib mca coded? i cant think there would be a problem. would you do fiberglass tanks as well? i like the way you can fit them flush to the hull and get bigger tanks in there, condensation is much less. has anyone seen a hydroulics platform that can be fitted on the transom? only needs to lift 30 stone. thanks people

pressman · 19 March 2006, 10:55

Have a little

experience of building a 9M with twin Hamiltons if you like you can pm me!

pop · 19 March 2006, 11:24

we have fitted 3 hamilton jet in small 12ft powerboats but i dont know what they are like in a big rib. has anyone used them in a over 8m rib ? they are a good package in a small boat and our reasonabley reliable. has anyone used the american jet? are they any good? thanks

pop · 19 March 2006, 13:27

what do you think of this platform? http://www.floridabowthrusters.com/swimplatforms.htm how hard would it be to copy it? just seems like two hydraulic arms lifting a platform. i guess you could just make a smaller one for a rib. pressman had a good idea of getting divers on by deflating the tubes partly on one side, and getting them in that way. however this may not be the flatest way to get persons to get on the rib? any thoughts