Nah just be aware the 18 is light in the bow. They had many goes at getting the 18 right, then they gave up!
Nah just be aware the 18 is light in the bow. They had many goes at getting the 18 right, then they gave up!
Diablo,
Are you talking uoyancy as in say foam filling the hull?
If so, wont make a scrap of difference.
If you are talking re-designing the hull, then you are biting off more than you can chew.
The downfall with the majority of 18' cats is the windscreen / cabin is too far forward and therefore the weight of the driver / passenger/s causes it to be nose heavy.
The best thing you can do is get your weight distribution of everything on board correct.
Cheers
Pete
man cats are complex little beasties, thanks for the explaination
Re: Scary Cat
Yeah pete I was just wondering whether foam would have any effect,re-designing a bit beyond me,thanks to you also Kerry, will put some photos on soon as so you guys can help me identify what year she is as this intrested me in previous discussions Ive read.
a lot here might disagree on this, but aside from the lack of lift in the bow ANY (almost) 18 foot Sharkcat, would be the most forgiving boat bar none, Mono or Cat, unless you are a complete ninnny you can run then with pretty badly adjusted trim and they still go good, in the breakers, in big chop, side on anyway they will go (given good power that is)
I would love to have a play with an 18 footer and add wave piercers to the front of the hull....
I think this may go a long way towards fixing the droopy bow problem without affecting the ride.
Cheers
Pete
Hmmmm, interesting concept Pete.
Just how do you think one might go about such an exercise?
Also, are their noticable advantages having a wavepiercer, aka the marlin broadbills? Antone ridden one with and without?
Damo
Give a man a fish, and he'll eat for a day. But ,flogging him into submission will result in him taking up crabbing.... and once he gets a taste of that sh*t, well, he may never return again.
Hi PeteOriginally Posted by Grand_Marlin
Local boat builder has built a 6m concept cat, displacement boat, orignally powered by twin 25hp motors achieving a WOT of 18knots still in displacement. Back to what you said. He at one time fitted wave piecers to get bow lift and cut them off again put lifting chines for a far better result.
Currently the builder for cape cats
cheers
blaze
Yeah Blaze, I remember you mentioning something about that boat in another thread that died b4 you could elaborate.
I'm eager to know more, e.g. size(is it trailerable?), sponson configuration, build material etc. I also remember you saying that this boat was about to be upgraded to bigger motors. Any news on that front?
If all this is true (and it sounds too good to be), then surely it warrants further investigation. Please, Mr Blaze, sir, any more info would be greatly recieved.
Damo
Give a man a fish, and he'll eat for a day. But ,flogging him into submission will result in him taking up crabbing.... and once he gets a taste of that sh*t, well, he may never return again.
Hi Damo
If member seabug sees this he has some recent pics of it, he was showing some interest in purchasing when it come on the market (think he is haveing second thoughts). I havnt seen the boat for sometime but he is upgrading to 60hp etecs and I think he is trying for about 24knts cruise at about 1/2 throttle with the boat still running in displacement. It was been built of a close cell foam sheeting and glassed over (name of product is slipping my mind ATM). I would buy it tomorrow if I had thge money. If you would like his PH number I can get it for you and you could talk direct to him. Nice fellow and would discuss it with you just because of his belief in the product and his love of design and boats.
cheers
blaze
Ps
Couple of things I really like are that there are no scrubbers, no need as there is only a stainless rail at the back of the boat, hard top, left hand helm and the thing goes for bloody miles on minimum of fuel
Yep, cool, pm me the info. Also, what the blimmen 'eck do you mean by 'scrubbers'?????
To me, scrubbers were the dirty girls at school who used to invite you behind the bike shed at lunch. Oh, to have that time again............woops, ah...yes, sorry, you were saying?
Give a man a fish, and he'll eat for a day. But ,flogging him into submission will result in him taking up crabbing.... and once he gets a taste of that sh*t, well, he may never return again.
Slight side track, how do the single stern drive models handle in rear 1/4 on sea's? With only 1 motor to trim do they suffer the nose dive worse than twin o/b's? Thanks Leigh
Interesting concept Pete, I am currently redesigning a cat hull because it is a pig. The thing had a bow in the middle of both sponsons (as much as 50mm), and it is a early assymetrical hull (no beers for guessing the make) with a "tail"which was used for the single motor setup. Overall result, a very bad ride, dancing all over the place with no real ajustment on the trim. This left the boat slow, never really getting off the plane eventhough there is a heap of HP. All the strakes are wrong or in the wrong position.
As part of the exercise I will be extending the hull down by a heap, symetrical design, fuel tanks will be lower (and bigger) as well and I will be reshaping the entry point of the sponsons so there is more boat in the water, and the boat will be cutting the wave earlier. There are a HEAP of other mods as well when the boat gets flipped right way up
Iwill endeavor to get some pics up
blaze , could you pm me the info as well thanks! I am finding this thread very interesting, especially for new owners of cats like myself, and would like to find out as much info as possible.
The wave piercer concept and current fleet of Incats actually developed from an 8m concept way back in the 1980's. However this wave piercer concept is really not adaptable or modifiable to the typical 5-6-7-8m cat as most are accustomed too.
Some alloy makers have tried an extended (bulbous) bow type concept but it's really not close to the typical wave piercer and questionable if in fact it actually worked?
Regards, Kerry.
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