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Old 06 February 2003, 08:19   #21
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On a small RIB (up to 7/8 mtrs) trim tabs are not of much use (no that high free board, low boat weight, easy to move things on the boat to correct trim (i.e. leaning left or right ), engine trim use etc etc )!!!

I put the trim tabs on my 7m because due to the heavier inboard, and the thought was to bring the nose down and stop or cut down the slamming in a head on sea, the thought of actually trimming the boat, on a beam sea was there, but was not that important to me really.
The difference is quite noticable, when getting going, and on a long head on journey, if the weather is ok, then they are simply trimmed all the way up, and clear from the water, so do not affect performance and all that.
The original question was putting them on a 7m - and how effective they are/would be - my experience - made a difference, and would fit them again, if need be.
Have been on an 11m with trim tabs, and the difference was virtually Bog all, much more on the 7m.

Easyiest was is for you to come up to sunny Skye and take a spin (well it is sometimes sunny)

Pete F
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Old 06 February 2003, 08:21   #22
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Manos, thanks for that last post, all crystal clear now!!

Why study "basic naval architecture" when I can always ask you.

As for a serious discussion, how about reviving your old thread about the problems of drilling holes in stainless, and the possibility of a forest fire. I liked that one!

As for my degree, I thought I might study Greek Mythology, maybe research your boating knowledge.
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Old 06 February 2003, 08:41   #23
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Hey Manos! Calm down!
And Dirk, try not to wind him up. Please!

For my 2p worth (possibly over priced!) there is no question that trim tabs will work on small boats, but I would still question the need for them -- by small I mean under about 7 metres.

For fore and aft trim a reasonable weight distribution plus the engine trim should be sufficient. On the other hand a small boat with a diesel engine may well benefit from trim tabs.

For lateral trim I'm not convinced that trim tabs would be particularly effective on a small RIB. In conditions likely to make their use necessary, the course driven will be endlessly changing as you drive between the waves so the trim would have to be constantly adjested. One more thing to fiddle with!

On a bigger boat they have several applications: to compensate for windage; assist with getting over the hump onto the plane; keep the bow down in a head sea. The first of these is fine, but I can't help thinking that there ought to be more efficient ways of dealing with the other two situations.

Having said all this, I doubt that the average powerboat driver has the skill or knowledge to use trim tabs effectively anyway. From a quick glance around the Solent on a busy day it's clear that most can't even master the most basic for and aft trimming and bounce around with their bows pointing to the sky . . .

John
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Old 06 February 2003, 08:54   #24
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Quote:
Originally posted by John Kennett
Having said all this, I doubt that the average powerboat driver has the skill or knowledge to use trim tabs effectively anyway. From a quick glance around the Solent on a busy day it's clear that most can't even master the most basic for and aft trimming and bounce around with their bows pointing to the sky . . .

John
John, I am suprised at your last post, you are obviously an intelligent man, but are you seriously suggesting that the average rib owner has greater skill and knowledge by virtue of owning a rib.

I always thought that the majority of rib owners bought them because they lacked the necessary skills required in close quarter manouvering, hence the large inflatable fender that they come equipped with. IMHO
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Old 06 February 2003, 09:55   #25
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Nothing to do with this

Here Dirk

See in your boat type box thing it says ' A very disappointing Falcon

just to keep the peace and all that - why not start a new thread telling us why ?

Not Stirring or anything...

Pete F
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Old 06 February 2003, 10:55   #26
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Originally posted by Dirk Diggler
John, I am suprised at your last post, you are obviously an intelligent man, but are you seriously suggesting that the average rib owner has greater skill and knowledge by virtue of owning a rib.
Absolutely not. I include RIBs in the generic term powerboat. What ever made you think anything different?
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I always thought that the majority of rib owners bought them because they lacked the necessary skills required in close quarter manouvering, hence the large inflatable fender that they come equipped with.
I don't know about the majority, but I can certainly think of a few cases where this applies!

John
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Old 06 February 2003, 10:57   #27
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Falcon

Hi Dirk

Whats up with your Falcon then???.


Julian
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Old 06 February 2003, 12:12   #28
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Seafariskye & Julian.

So you load em and I fire em. I don't think so.

All that I'm prepared to say is that the Falcon represents good value for money, ( I have to say that cos I've got a punter) as long as you accept the fact that you only get what you pay for.

Not wishing to upset our South African Members, I think my Falcon is a classic example of the obvious lack of skilled workers in SA.

I believe you can buy one of these boats, ie: hull & deck, tubes, console seats etc for less than the price of a tube from Henshaws, me Greek mate could probably confirm this.

The boat is good looking, and has a good turn of speed with a 115 four stroke mercury, but the ride and handling, together with the banging, crashing and rattling is pretty poor.

To finish, I would say that if you are on a tight budget, or you aren't interested in quality, then a Falcon might be worth considering.
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Old 06 February 2003, 12:19   #29
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Dirk

Hi Dirk

Interesting to know thats all. Allways good to get people opinions of boats etc.

Julian
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Old 06 February 2003, 12:26   #30
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Dirk

Out of interest what size was the Falcon you had, was it the 7 mtr one. If your looking for a scorpion there is a few second hand ones on the Scorpion website.

If you want a run in one to get an idea how they handle give me a shout and i'lll take you for a run.

Julian
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