zensuni wrote:The rounded edge looks safer, but in case of a brutal collision with a human body the aluminum won't break or bend.
Why aluminum by the way ?
I work in a factory with laser cutting machines, I am used to working with these materials, aluminum, steel, bronze ... on the other hand, and in my place I have adequate tools to work with aluminum. I do not have a welding machine, it hurts
next to my house there is a warehouse and sale of aluminum, they sell me aluminum plates and profiles that want to 4euros a kilo
The raw material for experiments is very very cheap. the density, weight of aluminum is the same as the material g10 fr4, so I have the same weight in the fins, but this is a lot more expensive and polluting
carbon and fiberglass when they start explode, like ceramics, blades like blades. It is not very common for it to pass in one fins but the aluminum will bend without causing cuts.
working time. Now that I know how to do them, I take very little time to do the keels, in fact, as its base is removable 3 + 3 + 3mm, it goes to screw, I just have to make the thin part 3mm sheet. to make 2 keels snow just need 30 minutes of work.
to make them in another material g10 for example I have to buy a sheet of 10mm, I do not see the system of 3 + 3 + 3mm in this material, and spend ohas wearing, too much work to get a result that I do not know if it would be suitable. keel shape, aera ....