Why are mats so fast?
all the best
Personally I'm always ready to learn, although I do not always like being taught. - Winston Churchill
Greg, Im sure the other mat-ers will join in but there’s a few reasons.
Because its flexible the pressure inside is the same all over the mat so the pressure it places on the water is evenly distributed too.
Being flexible it has no AOA to the water or rocker.
Due to its buoyancy, there’s minimal water displacement.
The flexible hull absorbs the chop rather than reflecting it away like a board.
So you’re on a soft, rockerless, flexible bubble that makes minimal interaction with the water.
The same lack of drag also makes it difficult to control because they don’t carry the speed when changing direction.
So it’s almost shaped. This carapace or shell will control the distribution of the air and how the craft turns , it also creates a curved shape that *should* prevent buckling but allow torsion so I can twist the craft from rail to rail to fit the curve of the wave.
If I can get if to flex about 10 degrees difference from nose to tail it should allow the nose to be angled into each Turn but keep the tail section flatter for driving.
It’s based more around the flexibility of the deck so I’ll change the Thread title to Flexible Deck Inflatables.
Mold is finished.
Some nose rocker and then flat out the back.
On the deck an even curve to distribute the volume. A little less volume in the nose for duck diving and keeping a fair amount in the tail for drive out on the face.
I’m not going to glass it like standard moulds. As the moulds outside surface becomes the inside of the craft, it doesn’t need a class A finish. I’ve got it on a rocker table and I’ll put a polyethylene bag over the mold and then vac glass over that.
The board seems overly thick for flexing?
Hi Greg, mats are about 3 inches thick and so is this craft too. I didn’t want it to flex too easily or not enough so I’m going to vac 12 layers of glass like on Greenoughs spoon boards to see how rigid or not the shell will be.
When flexing becomes snapping I want to avoid so I’ll try 12 layers and add if necessary.
This is just the mold that I’ll glass over and then pop the shell off and ride that.
The deck shape is done and I’ve got it on a solid platform with a curved ramp around the nose rocker.
Just filling in the gap between board and platform so there’s no undercuts and the glass can pop off easily.
I like this. I’ve always been curious about mats and how they work. (Anticipating when I can no long pop up on a hard board)