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Old 25 May 2006, 08:49   #31
ADS
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Quote:
Originally Posted by codprawn
Most true offshore RIBs have turned up noses and big tubes - look at Ocean Dynamics - Delta - Tornado - Humber/Quinquari - Avon etc etc.

They do make a stuff a lot less likely - although when the stuff DOES occur they prob do make things worse!!!

http://www.riblog.co.uk/blog/media/chris-and-brad.wmv

This video shows it clearly - look which boat stuffs - it is NOT the one with the upswept nose.
They are both Ospreys though, which are generally regarded as capable offshore boats and not shallow v type med style day boats. I think Hugh's nose was a little higher due to firstly the design, secondly he has a bloody great 200 opti on the back and finally he was trimmed out a little.
Downhilldai, probably got the wrong end of Hughs wake, and it wasn't a true stuff as far as I can see, just taking the top off a wave.
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Old 25 May 2006, 08:57   #32
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and different speed
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Old 25 May 2006, 08:58   #33
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Quote:
Originally Posted by ADS
They are both Ospreys though, which are generally regarded as capable offshore boats and not shallow v type med style day boats. I think Hugh's nose was a little higher due to firstly the design, secondly he has a bloody great 200 opti on the back and finally he was trimmed out a little.
Downhilldai, probably got the wrong end of Hughs wake, and it wasn't a true stuff as far as I can see, just taking the top off a wave.
Agreed.
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Old 25 May 2006, 09:38   #34
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Unless I'm mistaken, one of them is a 6.5m RIB and the other is a 5.5m RIB. You can't ever compare the performance of two hulls with 18% LOA difference!
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Old 25 May 2006, 09:49   #35
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Originally Posted by Richard B
Unless I'm mistaken, one of them is a 6.5m RIB and the other is a 5.5m RIB. You can't ever compare the performance of two hulls with 18% LOA difference!
Your right as usual Richard, they are infact drastically different boats: I ve just checked Downhilldai's profile and its a Northcraft
So my post was infact utter bollocks anway!!
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Old 25 May 2006, 10:00   #36
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i was going to say that they are not both ospreys.....

brads boat has a lot less bow rise than mine but also he had loads of fuel strapped into the front of his boat making matters even worse

i have a clear 1.5 m advantage as my boat is nearer 6.9 m than 6.5 and when the boats are side by side the difference is quite noticable.

brad got wet quite a lot during the day and i would venture to say he never really stuffed it in the true sense of the word he just got splashed a lot. main prob was the heavy load at the front of the boat and the vid was actually the worse one of the day by all accounts. we had a fair bit of wind and a bit of chop which swept any airborne water over the boat which did not help.

Brad Roy and myself will be out and about on the water over the next few days so we shall have some fun and we can do some more pics and vids hopefully

with the 200 we have been airborne a lot of times and the vid was a tiny tiny airbourn incident but i must say that it always lands very nicely and softly so very chuffed, does nto seem to be in any way tail heavy so far
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Old 25 May 2006, 10:08   #37
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Originally Posted by ADS
So my post was infact utter bollocks anway!!

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Old 25 May 2006, 17:52   #38
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I'll try moving my fuel load aft this weekend, where it belongs. It's been fine back there for the last 12 years, but you have to experiment with these things.
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Old 26 May 2006, 06:15   #39
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on the subject of ospreys, i can think of one example of a non big upswept bowed boat that is good in following seas!! a lynx! why cause its hard nose cuts, and goes through the waves.... which reminds me... new post!
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Old 26 May 2006, 18:42   #40
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Quote:
Originally Posted by codprawn
Most true offshore RIBs have turned up noses and big tubes - look at Ocean Dynamics - Delta - Tornado - Humber/Quinquari - Avon etc etc.

They do make a stuff a lot less likely - although when the stuff DOES occur they prob do make things worse!!!

http://www.riblog.co.uk/blog/media/chris-and-brad.wmv
Can I change the subject slightly, to ask: what is the likelihood of damaging the engine over-revving if your prop comes out of the water like happens on the leading RIB as it comes past in that vid? I have had a couple of little surges in mine when hopping waves but it is something I am a bit paranoid about! On the other hand I suppose it is not uncommon for outboards to do this so should I be worried about it or not? Maybe new sexy engines have rev limiters on but I am pretty sure mine doesn't.
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