Stringers !! everyones favorite subject

[AZMIDLYF]

[GIL_CV21]

Let me know when you have a Asian product that was designed/conceptualised in Asia in any part of your life..
They aren't stealing everything they can from the west because they are creative and can think for themselves, they just have cheap labour.

[GIL_CV21]

Looks just like a F22 , industrial espionage is the only cleverness Asians posses .

[powerabout]

Looks just like a F22 , industrial espionage is the only cleverness Asians posses .

its all Russian

[0412go]

Something that has never had a mention or been discussed is the shape of stringers !!
Skinny stringers like ply wood on edge exerts a tremendous localised pressure over a very small narrow area !!
Even mounted on top of core this pressure is capable of bending the panel quite significantly !!
If there is no core on to a solid glass hull then the bending of the hull panels is really significant !!
This shows up with boats fitted with grids where the Actual lay up of the hull has not been changed to anticipate the hard pressure points and micro cracking of the gel coat begins to appear as the boat ages and gets used more !
To anticipate this bending and to spread the load out wider then a glass pad needs to be made by laying strips of glass !! NOT just any old glass but a decent fabric with glass strands going it the right direction to spread the loads better also that is going to add strength and flexibility yet become stiff enough to distribute the loads imposed outwards ! 1708 is possible the best fabric available and a minimum of 2 layers with staggered edges so there are no hard points and is tapered where the layers finish ! the actual glassing of the stringer to the hull is going to add even more to this pad as well .

Ok that's narrow stringers !! How about making wider stringers !! These can be made from Foam !!
foam has been used for longer that I can remember !! Easy to work with !, easy to lay , easy to shape ! and wont rot ,wont fall over when extreme pressure is applied get covered 100% with glass and because they are wide distribute and spread the loading over a much wider area

The glass use over the foam is what's going to do all the work !! There is a natural force upwards from the hull when pressure is applied so the glass layers need to be able to carry this pushing load without buckling or compressing and deforming in any way
so again any old glass is not good enough
Triaxle is the best I know of BUT when you lay it there's ways of making an even significantly better stringer !! ok lets look at what's been written !!
First layer , this is against the foam -45/45/90 ,second layer 90/45/45 !! now you see the 90 degree vertical strands are buried and encased between layers of 45 stands both sides so the bulk of the load is taken by the vertical 90 stands which are impossible to bend in any direction and the loads imposed are all carried and spread out onto the hull bottom !

Tunnels never finished this part !! what happens along the top of the stringer that's not got mentioned any where !!
If it supposed to be a eye beam this isn't !! does anyone know how the top is finished ?also does the glass go up and over and down the other side ? made like this its still a bendy beam!