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Old 07 August 2004, 07:56   #11
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Alloy?

Aluminium hulls much more expensive to produce - only really worth it for a one off custom job.

GRP much cheaper if in series production.
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Old 07 August 2004, 09:47   #12
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Quote:
Originally Posted by Searider
Aluminium hulls much more expensive to produce - only really worth it for a one off custom job.

GRP much cheaper if in series production.

Yes and give a much smoother more hydrodynamic profile - alloy doesn't like complex curves!
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Old 07 August 2004, 12:49   #13
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Quote:
Originally Posted by searider
GRP much cheaper if in series production
hmmmmmmmmmm I need to be convinced on that one and I'm not talking about RIB Eyes, Falcons, RIB-Xs, XS RIBs, Valiants, Humbers and the like, but the more upmarket boats i.e SCORPIONS, SPORT RIBs, OSPREYs etc.

Quote:
Originally Posted by codprawn
Yes and give a much smoother more hydrodynamic profile - alloy doesn't like complex curves!
That I don't know since never been on an aly boat (will be in November though ). I would think that aly made boats will be slower in some cases than fibre glass ones due to weight and engine type (diesel vs petrol). Which I don't think that it matters that much since it makes no difference if your top speed is 45 or 35 knots, if you only cruise between 20-25 knots.
However, looking at prices and comparing the so called 'good' fibre glass production RIBs with aly RIBs it seems that aly RIBs do not cost (relatively in some cases) as much as the 'good' fibre glass boats
Idea, I will see if I can dig some prices out so that we can compare both types of boats.
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Old 07 August 2004, 20:46   #14
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GRP series production

Manos,

We all know that the premium brands cost. - I want a Scorpion and will have one when I have saved the pennies.

However, once you have produced the plug and mould for a GRP hull it will be way way cheaper to churn out GRP hulls than aluminium ones. Have you ever tried welding?

This cheaper production cost can either be seen as cheaper prices for the customer or more profit for the builders.

Anyway, if alumnium hulls were cheaper to produce than GRP then we'd all have aluminium hulls.

QED

Duncan

PS

Have just got back from Cowes where a very good Abba tribute band was playing. This message may contain traces of irony and scarcasm. Please disregard if easily offended.
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Old 08 August 2004, 01:49   #15
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I like the SCORPION too. But I am considering an aly hull also. Prices between the two types are very close if the SCORPION is new. Secnd hand is a lot cheaper.
I have welded a few bits in my life time. And yes is hard.
I think cheaper means less profit for the producers (instead of 200% to 50%) and better prices for the customer
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Old 09 August 2004, 05:37   #16
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If you do a search for "crazyhorse" or "eurocommuter" then you will find lots of stuff about Ali RIBS. Mr Horse who has not been seen anywhere of late alledgedly ordered a sooper dooper Ali RIB from a Canadian builder. However nagging doubts are beggining to surface that it was a "virtual RIB"

Ali seems popular in Canada and NZ and I think its a damn good idea for RIB construction although I would prefer soft tubes rather than hard ones. However there is a well known homebuilt (and that term does not do it justice as its a very smart boat) rib called "Awesome" owned by Andy Micklewright, which has done some serious cruising and is a very capable boat.
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Old 09 August 2004, 06:13   #17
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Is Awesome, not an 11m redbay ????
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Old 09 August 2004, 06:16   #18
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Hi Tim,

Hope you got the goggles OK?

Awesome Explorer is indeed a Redbay but Andy also hand-built an aluminium RIB which he still has - can't remember the name of it though! Richard reckons it's a great boat!

HTH

P.S. Replying in case Alan's gone away from his computer for a while!



Edit: Ooops! Sorry Alan! Didn't see you there!
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Old 09 August 2004, 06:16   #19
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Nahh, "Awesome Explorer" is Andy's 11m Redbay whilst plain old "Awesome" is his Ali RIB. Yes I know, Two monster RIBS. Lucky bugger!

Tim, from what Gavin tells us and from seeing your experiences during RIBEX and Ali hull would be the thing for you as its easy(ier) to knock the dents out!!!
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Old 09 August 2004, 06:52   #20
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Quote:
Originally Posted by Alan
If you do a search for "crazyhorse" or "eurocommuter" then you will find lots of stuff about Ali RIBS. Mr Horse who has not been seen anywhere of late alledgedly ordered a sooper dooper Ali RIB from a Canadian builder. However nagging doubts are beggining to surface that it was a "virtual RIB"
I think you may be correct Alan as far as the 'virtual RIB' idea is concerned.
I have looked and have participated on those threads you mention but I think that the Horse was trying hard to push his idea of the aly RIB and therefore his opinion (IMHO) was biased in many respects.
I also like aly RIBs with soft tubes rather than hard. The ones that they make in Sweden and have had photos and lots of literature about (their marketing manager STIG is a very nice and friendly chap) are made out of PVC and are filled with polyurethane. However, I am investigating the idea of hypalon/PVC.
Will have to see.
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