You mean the hole pattern? If so, it's simple. All holes are 40mm apart on center and for the insert packs with the smaller distance of inserts lengthwise, the distance is cut in half to 20mm on center.
It looks like your core is just too stiff for the feed rollers to push it down into the rather tight looking core profile you are trying to achieve (how long is this core and what are the thicknesses you're aiming for?). You can adjust the tension of the feed rollers on this sander - check the manua...
www.junksupply.com has wider base material on offer and ships worldwide afaik.
Otherwise I guess it would work to just butt up a couple pieces of base material to get a wider base. A die cut base graphic works the same way. You could do some racing stripe types of patterns for example.
Welcome to the forum! Base material is usually not only sanded, but also plasma or corona treated by the manufacturers to get it to bond properly. I'd suggest you try to get some scraps from other Australian builders and run some adhesion tests with your own abraded/flamed material for comparison. Y...
The triaxial glass should ideally be used wirthe the same type of fibers facing the core - either the 45 or the 0 fibers. Which one of them is up to you. Placing the 0 degree fibers facing the core results in a slightly softer board over the length with more torsional stiffness. If placing the 45 de...
There are some things you could try (or a combination). Many epoxies are quite brittle, so adding a bit of flexibilizer can help with delaminations. Make sure to test if the flexibilizer works with your epoxy on a sample! And as already suggested adding some sort of filler to hold the epoxy, such as...
I think the hairs are probably remains of a fleece-backed topsheet - however the fleece should have only improved bonding if enough epoxy had been used.
Capita builds snowboards by applying the topsheet after the board is fully pressed and cured...I was wondering if this was one of their boards. Still might be, as they produce OEM boards too.
If this has been built the traditional way, then the culprit is probably that they used too little epoxy.
A standout change is the doubling of the tensile strain to failure (and the charpy). I'd expect the laminate properties to be better for the higher cure temperature, especially fatigue properties should be much better because of the higher toughness. Dang, totally overlooked that one! Good thing we...
It is not just the Tg that goes up with post cure, other mechanical properties increase as well, especially compression. For the Sicomin resins we use, that is not the case. E.g. with the Sicomin SR 1280/SZ 8525 combo we use, with longer or higher temp post cures pretty much all relevant properties...