boat sides thickness

[laugag]

http://www.sportsfish.com.au/forum/images/icon_mi_1.gifPosted - 09 Nov 2008 : 02:21:28 AM http://www.sportsfish.com.au/forum/images/icon_profile.gif (http://www.sportsfish.com.au/forum/pop_profile.asp?mode=display&id=13155) http://www.sportsfish.com.au/forum/images/icon_email.gif (javascript:openWindow('pop_mail.asp?id=13155')) http://www.sportsfish.com.au/forum/images/icon_edit_topic.gif (http://www.sportsfish.com.au/forum/post.asp?method=EditTopic&REPLY_ID=38035&TOPIC_ID=38035&FORUM_ID=44) http://www.sportsfish.com.au/forum/images/icon_privatemessage.gif (http://www.sportsfish.com.au/forum/privatesend.asp?method=Topic&mname=laugag) http://www.sportsfish.com.au/forum/images/icon_reply_topic.gif (http://www.sportsfish.com.au/forum/post.asp?method=TopicQuote&TOPIC_ID=38035&FORUM_ID=44) My tinney 4.32 Snyper is 3mm bottom and 1.6mm topsides..
50hp yammie on it (I believe this is the max you can put on a vessel with 3mm bottom)

I want to do estuary and some close inshore reef fishing .

I have never been too concerned about heavy sides on a vessel because to me it is the bottom of the boat that takes most of the punishment, but is this line of thinking flawed? is it important to have thicker sides if going up in horsepower? I have noticed that many of the stacer and quinnes use 1.6mm topsides under the 5m length.

I drive for the conditions and go slow when rough (not gunn it like some do) to reduce the strain on the vessel (and increase safety)

Is the thinness of my sides going to cause me problems in the longrun if I go "outside" to often? I have also put in extra ribs to help strengthen the hull overall.
I have heard stories of some people with their quninne dorys have extradordinary long lives and having been frequently used 'outside

[3rd degree]

I have a Dory and use it outside as often as I can and have had it welded up no less than 4 times.

You've got the right idea putting in extra ribs!

Cheers

Jim

[Mike Delisser]

(I believe this is the max you can put on a vessel with 3mm bottom)

My 4-35 Bluefin Wildcat has 3mm bottom & 3mm sides and is rated to 60hp & I know the Savage 480 Pro Angler has 3mm bottom & 2mm sides and is rated to 90hp. I think there is a formula the manufacturer uses to work out the max hp.

[laugag]

I have a Dory and use it outside as often as I can and have had it welded up no less than 4 times.

You've got the right idea putting in extra ribs!

Cheers

Jim



Jim, When you say welded up , are you reffering to the bottom or sides?

[3rd degree]

Where the side meets the bottom, has split through the weld up to 80cm long.

The last time I had it welded up I asked them to make it a particularly chuncky weld and it is holding for now.

Fingers crossed it lasts till the new one arrives!


Cheers

Jim

[Noelm]

of course the side thickness is important, no use having a 10mm bottom and tinfoil sides, they contribute to the overall strength of the Boat and give it a rigid structure.

[black runner]

Transom thickness also varies from side thickness.

[iceknight]

all the tinnys seem to crack. esp the quinnys. I had a new one a small dory and the first wave i hit the esky moved. and split it where the side meets the bottom, an ex boss of mine also has a 610 quinny, and his has cracked at least 3 times. and been used about 5-6 times. seems they dont make em like they used to! another fellah i know had a side consol job, and it split the tank and caused major problems. it either ate the floatation foam out, or it had to be replaced.. cant 100% remember,

[ShaneC]

They certainly dont make them like they used to. I have an old 4.5 Quinny Fish Raider in the garage and while it has been looked after, it certainly has had its days of pounding across the bay, and it doesnt even look like cracking It has a very small crack on the topside on the gunnel, but I dont think this would compromise saftey so I never worried about it and it never got any worse. Not bad for a tinny thats cracking on for 27 year old I think. I just cant bring myself to get rid of the old girl now the new rig has arrived, for what I'd get for it I would be struggling to replace it with a tinny even close to it.