How strong how light and of what material should the beams be going
to the weather hull on a 16' equal L an 8 ' beam ? I know I know its
only 16' but thats all the room I have and can afford. I was thinking
of maybe a 16 or 18'' center walkway between the hulls and two
laminated 2x3s about two to three feet back from each bow connecting
the two hulls at each end. What do you think? To heavy, over kill, or
not strong enough?
How strong how light and of what material should the beams be going to the weather hull on a 16' equal L an 8 ' beam ? I know I know its only 16' but thats...
Todd, That is the question that has been preoccupying me. My thoughts are a 4x 2 in clear tight grained oregon. I was also thinking of bolting another 3'6" of...
Hey Robert, You see the the hollow birds mouth beams on the EQL7. That seems like a good reference point on determining how strong they should be. I'd go with...
Todd, I had a good look. Beautiful joinery but I think I 'll go for box section 6mm plywood with 1" thick oregon reinforcing of the flanges and an extra sheet...
As it is such a small boat I would suggest putting on what you think will do and have a go. Ply box section beams are strong, light and easy to build. If you...
G'day, There are a few variables, but basically, 400 gsm uni glass is about $15 per kg, 300 gsm carbon uni is about $150/kgand carbon tow is $30/kg, epoxy is ...
This is my understanding of the problems of reinforcing. The glass can be too flexible to provide much support to the timber before it goes unless you really...
Where can you find more information on building carbon mast and beams? Todd ... about $15 per ... epoxy is ... are ball ... glass, ... especially ... uni's ......
-Todd, I went over the building of Harrigami and the pictures show the methods. The actual dimensions are another matter. The cost of carbon tow is starting to...
G'day, The reason the booms are wood cored, yet masts are solid carbon is that the beams have to be stiffer (deflect less), therefore they are a bigger ...
Makes sense, Hollow carbon stiffening would be a pain to produce and bucky tubes haven't yet come down in price. Thanks, Robert ... that the ... sufficient ......
Hi!, Just building some trimaran cross beams, and want to talk about what I've found out. Apart from that I should be building a Harry proa - I found that in ...
... You wrote - You have to make a box section, nothing else is remotely comparable. I dissagree I'm no engineer but I do have a tri with round beams Rob and I...
Horses for courses. It is hard to beat bamboo for ability to take loads and torque from all directions but if the bamboo was constrained with the load more in...
I guess I don't know really about other things that I haven't seen, tried or heard about. I wonder what you mean by ring framed etc. I built a beam (markI), ...
G'day Tony, I'm no certified engineer either, but what I said is right. I think you are saying that you made a hollow round section beam - for a proa? - which...
I'm not sure if upper or lower case but I tried to paste it as a symbol into the email and by the looks of it it didn't work. The symbol looks like a 0 with...
Tony, Idiosyncrsies of our medium of communication. That's the upper case omega- as used in electronics to denote resistance. The lowercase looks like a...
Robert Don,t worry about the math because I think Ray is an engineer and may have done it already. I thought they might be weak torsionally but because there...
Thanks Robert. Yes a lot of time, effort and experience goes into each part of the design and we contract the services of a very good composite engineer with a...
Mark, Is the Elementarry building method similar to the Farrier vertical foam stripping building method? (http://www.f-boat.com/pages/construction/index.html) ...
Andrew Dickson
andrew@...
Jun 5, 2004 7:53 am
MessageNo, Ian uses form frames and glasses one side only which then requires the outside surface to be fully faired after glassing. We will be making a female...
Hi DOug The reason is I didn't want seastays They cause lots of drag when underwater, add weight, cost of fittings etc, take more time to initially fit up,...
To Tony, I've forgotten which reply I was making to you, but I remember talking about anything hollow meaning a box as opposed to something solid. I really...
Doug, The latest design of the Harry beams based on four carbon rods on the corners gives plenty of stiffness for the driving hull effect (See Marks comments)....
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