Next Gen Boards

General Discussion
1

A board made of aluminum Boat style construction 2mm thick sheet , press moulded top and bottom sections , internal ribbing to add strength top and bottom, sections sprayed with non- expanding foam to rejuice the hollow sound and feel. Joining top and bottom with fine rail weld to join the sections then rubbed down to give standard rail shape. The way you get it to float with

positive bouyince is inflate the boards cavity with air which can be ajusted for a surfers weight if board heats up in the sun it will not

pop as it has a pressure release valve. If you ding the board bubbles of air coming out of the ding will tell you where to repair it with aluminum based epoxy glue. Can use any fin system which

is placed inside the board at time of moulding.

Regards Rod

P.S. Should I invest in the idea your comment’s please would be

appreicated.

2

Probably a really crap idea because of limited elasticity of ally. I knew a guy in NZ who tried ally stringers and found that to get anough strength to prevent the board getting bent,( bugger all springback), the ally would make the board too heavy. Basically very liittle spring back with ally so dead feeling board was his discovery but hey lets hear some other observations, you could be on to something but my gut says not.

3

It may be a good thing , but remember DENNIS LILLEE, he did his arse on an aluminiun cricket bat that worked, so becuase it works doesn’t matter at the end of the day to the punter . that is were the invester has to look. Good luck

4

I say build it , ride it , and let us know how it goes !

my only concern would be hot queensland summer sun , wax melt / feet burn

other than that , heck yeah , why not try it eh ?

 cheers



    ben
5

I was one of the founding members of Hydro Epic, where we made hollow boards from carbon fiber, kevlar, and aluminum honeycomb using epoxy resin. I’m no longer there but they are still going strong. They’re aking boards with Merrick, Brewer, Walden, and Hynson, among others. Hydro Epics are made in a similar way to what you’re talking about - a top and bottom joined together with an internal reinforcement - and they use aluminum.

One problem you’ll encounter with aluminum is that it reacts badly with salt water. You’ll need to seal it to protect it from corrosion. We had all kinds of problems when salt water found its way into the aluminum skin. It would blister, deform, and turn into a mushy powder really fast and lead to board failure.

They other thing to consider is flex. I’ve found this to be the most critical part of making the boards feel right. Too soft and they get stuck in turns - they bog and don’t react to changes in input. Too stiff and the feel dead and lifeless - they don’t react at all to rider input and just go where they want. When you find the right flex the boards are lively, load up in turns, and spring back quickly - returning energy and creating forward momentum.

I’d forget the foam (or at least be prepared to forget it) since I think it will deaden feel as well as the sound. Also how will you get the foam to stay in place when you weld the parts together? You’ll also want to consider the effect heat and atmosphiric changes will have on the air inside the board. We had to put vent plugs (as has everyone else who’s made hollow boards) on to keep the pressure inside the board constant.

The last thing… hollow boards can leak. Solving that problem is more difficult than it sounds.

Good luck.

6

My Home break as I will call it is a deep paddle…more than a 1/2 mile when it’s small…had a hollow wave once,back in the days…it took on so much water in such a short time I literally had to swim it in…nearly drowned me…lol…but by all means keep with it if your heart is in it and maybe you can beat the water saturation thing.

7

flotation is displacement.

It won’t matter how much you pump air into it, it’ won’t effect the boyant force.

8

D.O.A.

9

Just a quick reminder from the construction safety point of view -

When welding an enclosed object, you’ve gotta be very carefull to avoid blowing yourself up!

Welding creates enough combustables that when you seal a “canister” type object, the thing rapidly fills with nasty explosive gasses, and if you get to the stage of a dangerous air to “fuel” ratio, you’re giving it the perfect conditions for a serious explosion… egnition source and everything…

People blow their hands/heads off regularly.

The usual trick is to fill the whole thing with water while welding to avoid having the air space in side, then drain it afterwards.

This of course may not be really what you want to be having to do in this case of course.

Just something to be aware of.

Otherwise, give it a shot!!

The craziest projects are the most fun ones.

Kit

10

" flotation is displacement.

It won’t matter how much you pump air into it, it’ won’t effect the boyant force.

" It wouldn’t effect the force, but it would actually bring down the net bouyancy of the board. Assuming the shell is rigid, the weight of the extra air would slightly counteract the bouyancy of the board. Now if we could fill it with helium?

11

Sounds like someone has inherited some money.

Whatever, happened to investing in what you know about or… learing about the Stock Market and compound interest.

Aluminum boards???

I suggest you do alot of internet searching for everything you can on the

Hollow W.A.V.E. surfboard, it was a fantastic failure…a weekends worth of searching will tell you why.

Promoted by Mike Purpus and built by Karl Pope.

Here is not a very good start…but of help

This link below doesnt mention any of the nightmares, financial troubles, the overstock of surfboard models that went out of style

within 6 months due to a changing market,design refinements and fads,and the high cost of developing a model and the production costs.

http://hollowboards.blogspot.com/

12

but ony a negligable amount, unless you’re intentionally trying to weight the board…which I assume is the opposite you’re trying to accomplish

Quote:

13

Here is what I found.

http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=JP2001206286

sounds stupid…probably no future.

What I liked where these Bamboo boards…actually just Epoxy boards I guess but bamboo veneered. Or did they have a core?

14

Well guy’s thanks for all your positive and negitive thought’s on the subject great to see your input on idea’s will take time to consider all the option’s.

Kindest Regards

Rod

Finfektion

15

There is a guy in england who built a hollow aluminium longboard. I read about it in a long board issue of Carve a few years back. He said it rode fine but the hollow sound was really annoying. He is a really well known logger, based at bantham I think and is into old cars also if someone can identify him.

16

This blog states that WAVE was the first when Aqua Jet was first stated in 1968 by Neil Townsend a steakhouse owner who wanted to make motorized surfboards with advanced materials. The shortboard revolution hit and he switched to shortboards,they used hexel aluminum honeycomb epoxy sandwich shells bonded with urethane at the rail.He latter used nylon honeycomb.3 years latter WAVE was formed.Its no big deal but this is a good example of how things are miss reported in surfing.

17

Archimedes Principle: The buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.

Buoyancy is a combination of weight and displacement.

Two vessels will have the same buoyancy if they are the same exact shape and weight. For example, if you were to place two identical Tupperware bowls in water and fill one with 6 oz. of lead and the other with 6 oz. of feathers they would displace the same amount of water. If you add 6 oz. more material to one of the bowls, the water line would then change. The water surrounding the bowls doesn’t care what’s inside the bowls. With two objects of exactly the same shape, it is their difference in weight that will determine the floatation.

Let’s say you were sitting in a boat in a pool with a large rock inside of the boat and you were to toss the rock out of the boat into the pool. The boat now sits higher on the water and the water level of the pool lowers. When placing the rock which has little displacement into the pool, it lowers the pool’s water line because the rock displaces only its volume. While the weight of the rock was in the boat the rock displaced its total weight, so the boat displaced much more water, raising the level of the pool’s water line.

• Buoyancy is a concept that can be difficult to comprehend at times. However, with a simple consideration of forces it can be made clear.

• The buoyant force is a consequence of the variation of pressure with depth.

• The pressure on the bottom of the object is larger than the pressure at the top.

• This leads to a net upward force on the object.

• If this upward buoyant force is larger than the weight, then the object floats!

• The difference in the weight of two vessels with identical shape will determine the difference in how high or low they float.

• The difference in the shape of two vessels weighing the same will determine the difference in how high or low each floats.

• If they have the same weight and shape, they will float the same, no matter what material they are made of.

So you can fill it helium and as long as the weight does not change, it floats the same.