To max beam or not to max beam
Submitted by Swompa on Mon, 2022-08-01 19:58
Working on an ally boat design and not sure on 2.7m deck beam or 2.5.
Boat LOA will be around 7.8 from tip to tip so don't want something that is going to broach in a blow.
Has anyone got pros or cons of either from amtowing point of view. I know of the towing restrictions.
carnarvonite
Posts: 8627
Date Joined: 24/07/07
Vertical sides
Go vertical from the chines up so you have the widest allowable beam at the chines not at the gunwhale so you can get away with the towing regs. The flare at the bow should take most of the spray away
Rob H
Posts: 5744
Date Joined: 18/01/12
Broaching is as much a
Broaching is as much a factor of bow design and weight distribution as it is waterline beam.
A sharp forefoot and/or bow heavy will over ride broad shoulders but they all contribute
I am building right now @ 2.7, and noticed that the waterline beam on the Bill Plugs/Oceanics look to be much the same at 2.5/2.7M. (2.2M)
In hindsight I'd likely go 2.5 but you do gain abit between the coamings and especially cabin sides which equates to between the seats.
You mentioned you are aware of the towing restrictions, in general?, or the difference between 2.69 and 2.71M?
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The older you get the more you realize that no one has a f++king clue what they're doing.
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Swompa
Posts: 3781
Date Joined: 14/10/12
Bring a broad shouldered
Bring a broad shouldered gentleman, more space between the seats would be quite nice though i guess it all depends on how much value (both financial and space wise) is between the |__| or \__/ hull shapes.
We will likely be going Plug.
I am aware of the need to get a permit every 3 years between 2501mm and 2700mm and you are unable to drive on the freeway, need oversize signage and a 4 flags.
Rob H
Posts: 5744
Date Joined: 18/01/12
plus flashing beacon at
plus flashing beacon at night
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
letsgofishing
Posts: 33
Date Joined: 23/03/12
No beacon required
There is no requirement for a beacon unless your boat exceeds 3mtrs in width. In which case you can't travel at night anyway.
Rob H
Posts: 5744
Date Joined: 18/01/12
Yes there is.Towing at night
Yes there is.
Towing at night up to 2.7M is allowed but requires a beacon
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
Ericl
Posts: 450
Date Joined: 02/05/11
Off topic a bit
Off topic a bit but does anyone know what the max width was before metrication ?
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