Yes. You are very correct.This will be difficult. It is in an experimental stage. There will be loads of testing and I may fail. Richard Woods recommended buying a mast.
I am following some articles I detailed in my previous post. One from this website and another by Ted Hugger of “Profession Boatbuilder”.Also with what the local market can bear.
I live in Beijing. China is not a DIY culture. Anyone here will tell me that building a boat is the wrong game here, Still I persist.
I’m gleaning information from any and every source that I can. I don’t have a set formula or theory. It would be great to have this experience and back ground.
I first compared aluminum spars, wall thicknesses and profiles. I need my carbon fiber to be as strong or perhaps stronger. I am using 3k 220gm carbon fiber twill fabric. It is 0.28mm thick. So I estimate 4 layers to be 1mm. I’m not calculating epoxy or thickness added to the fabric.
Wall thicknesses of aluminum T6 or T7 extrusion are 1.5 to 2.5mm thick. So to get that strength I calculate that I need 6 to 10 layers of carbon fiber, perhaps more.
Everyone seems to be waiting for some deep thought or emotion
Someone to get the devotion of what they do
Here I laid up 1 meter wide, 3 layers of glass fiber. I think I should have put only one layer. This is to provide something more solid for the carbon fiber to adhere to. Also I wanted to see if I could wrap the whole length without having to cut the fabric into 2 50cm strips. It went well.
Everyone seems to be waiting for some deep thought or emotion
Someone to get the devotion of what they do
Most masts use internal line/cable routing. Can’t have a solid core. Also you want the upper side of the boat as light as possible. The weight isn’t the critical issue, the material properties related to flex, fracture and torsion are the big deals.
My already completed 'Lil Bit'. A Martens Goosen V12 set up to sail me to the fishing holes.
Currently working on making a Helms 24 our coastal cruiser.
“Mark Twain/Samuel Clemens” wrote:Eat a live frog first thing in the morning and nothing worse will happen to you the rest of the day.
Jaysen wrote: ↑Mon Apr 29, 2019 3:44 pm
I tried to say something but God thought I was wrong and filled my mouth with saltwater. I kept my pie hole shut after that.
Looks good from the picture and hope it works out good for you.
"that it isn't just an ordinary sort of boat. Sometimes it's a Boat, and sometimes it's more of an Accident. It all depends." "Depends on what?" "On whether I'm on the top of it or underneath it."
A. A. Milne
Thanks for the input. All things considered, and I have considered most things, weight, strength, flex etc.
I have considered foam core, and wood core (if I could only get veneer). I would like an anodized
aluminum mast and boom, that would afford me an easier way out, lol.
No replies from spar companies abroad and no one builds them in China. Again I’m in the wrong game,
or so they say. But no complaints either, I’m a stubborn old man.
So we’ll see how it goes. I’ve done preliminary testing with the cross beams and fore beam.
It’s all looking pretty good but there really is no way to be sure, until it all comes together.
Everyone seems to be waiting for some deep thought or emotion
Someone to get the devotion of what they do