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Old 01 November 2009, 15:24   #11
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Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
Interesting

What company is it you build RIBS for
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Old 01 November 2009, 15:25   #12
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Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
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Posts: 6,298
Quote:
Originally Posted by Rogue Wave View Post
What company is it you build RIBS for
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Old 01 November 2009, 15:26   #13
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Country: UK - England
Town: Knutsford
Boat name: Red Jelly
Make: Narwhall 520
Length: 5m +
Engine: 1998 Mariner 75hp
Join Date: Dec 2008
Posts: 71
dont plan to ever sell the boat, and if i do it will be sold without the engine anyway espcially if it does have a nice shiny new evinrude on lol - it will be worth more than the boat !!!

Havnt asked insurance but i presume it wont be too extreme - am I way wrong ? By the time this project gets completed i will have my advanced powerboat certificate + Certificate of competence which i imagine should counter the system ?

I had wondered about the wave issue and spoke to my personal nav arch and he said that if I do commit to it and buy the engine, in exchange for a spin when its done he would design brackets proffesionally on CAD but he deemed it a small issue with the right fabs. He reconed similar fabs on the inside or maybe solid 2" Stainless Pipeing all welded then its completely solid- No play! But as he said, for that to be efficient we need to get the measurements and angles spot on !!! He went on about forces and there directions i.e. the transom will hopefully only have the engine weight on it, all the forward backward forces go through mainly the deck !
I also wondered about creating a floating transom like some of the Atlantic Pacific boats do, like a chunky a frame with built in transom but that will move the weight of the engine further back and leverage and moments etc may not fun lol

By tension, I meant that theres no play between the bottle screw and bracket on deck + transom i.e. I throttle up and the engine pushes the transom then that directly transferred to the brackets then finally thru the bottle screw and into the deck !
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Old 01 November 2009, 15:31   #14
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Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
Oh

I see

Quote:
Originally Posted by Rogue Wave View Post
What company is it you build RIBS for
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Old 01 November 2009, 15:32   #15
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Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
A word of warning about insurance. I recently was involved with a boat with a 90 Suz on it - the boat sank (fully - with 3 adults & 2 kids on board ! ) - the insurers despite knowing the make of both boat & engine and having taken the premium for 2 years declined to pay out. The boat was rated to a max weight of about a 50 -2stroke . So with hefty four stroke Suz on it - it got swamped.

Just be very carefull - but good luck !
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Old 01 November 2009, 15:32   #16
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Country: UK - England
Town: Knutsford
Boat name: Red Jelly
Make: Narwhall 520
Length: 5m +
Engine: 1998 Mariner 75hp
Join Date: Dec 2008
Posts: 71
Quote:
Originally Posted by JSP View Post
If the lad wants to do it and thinks he can achieve I say good luck to ya. Just be safe!!
Thats the attitude I like!!!


About the Company....I'd prefer not to disclose the company on here as I know this is a wild + crazy plan and DONT WANT MY PLAN TO BE CONNECTED TO THE COMPANY IN ANYWAY. But I will say that the company is a very respected, commercial boat building company with customers worldwide !
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Old 01 November 2009, 15:37   #17
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Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Quote:
Originally Posted by Downhilldai View Post
Am I right in saying you have a 1998 75 Mariner (according to your profile) which you believe is 80kg lighter than a 300 etec?
?
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Old 01 November 2009, 15:41   #18
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Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Quote:
Originally Posted by Willbrooksy View Post
... all the forward backward forces go through mainly the deck !
Does your Narwhal still have the original moulded GRP deck?
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Old 01 November 2009, 15:44   #19
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Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
Quote:
Originally Posted by Willbrooksy View Post
About the Company....I'd prefer not to disclose the company on here as I know this is a wild + crazy plan and DONT WANT MY PLAN TO BE CONNECTED TO THE COMPANY IN ANYWAY. But I will say that the company is a very respected, commercial boat building company with customers worldwide !
Ahh must be MST, excellent boats
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Old 01 November 2009, 15:45   #20
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Country: UK - England
Town: Knutsford
Boat name: Red Jelly
Make: Narwhall 520
Length: 5m +
Engine: 1998 Mariner 75hp
Join Date: Dec 2008
Posts: 71
Quote:
Originally Posted by Downhilldai View Post
Does your Narwhal still have the original moulded GRP deck?
Yep
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