Wiring

[blazerbotics]

Re: Wiring

Window plastic i think is PVC, it will break very easily, its far too brittle and thin. You can get ball casters from RS, ebay, technobots etc.

[roketrhino900]

Re: Wiring

I I bent it about 30 degrees with all my weight, I doubt it will snap from pressure and it is about a 1.5 inch crosssection. It is the thick type, for windows that slide open. I'll check about PVC, if so I'll try and find something else, its no use if it snaps off! In the meantime, does anyone know what sort of pressure Featherweight flippers use? I'm thinking around 150psi?

[blazerbotics]

Re: Wiring

All depends what system you are using. If your going low pressure (off the shelf stuff) then your looking at 10bar (145psi), which is what i suggest you do. If you go full pressure your anything from 250-1000psi depending on the temperature, but that then needs custom rams and hydraulic pipes/fittings.

[roketrhino900]

Re: Wiring

I might go 200psi, the stuff I'm using is industrial, submarine steel, steel reinforced rubber piping, which are 50,000 and 500psi respectively. I don't have anything else yet, but I'll get it to them pressures. Everythings to be strapped down with steel straps. Thanks again.

[jonny]

Re: Wiring

the problem with pvc is it's too brittle. i have a 1.5m by 2.5m 3mm sheet of it in my shed.

[roketrhino900]

Re: Wiring

OK, thanks, I'll be looking at something else.

[roketrhino900]

Re: Wiring

I'll be using ordinary steel for the flipper, an oppurtunity has just come, I can get the body, the armour, made from submarine steel, which is slightly heavier than regular steel, but much stronger, and £800 per square meter. Forgetting the price, because I've got an offer, is it worth the extra weight for the toughness? Its the same stuff used on submarines, if the name isn't obvious enough

[maddox10]

Re: Wiring

Sounds like an hardox equivalent kind of steel, more suited to the marine enviroment. And with DoD pricetag.

If you get the raw material for free, and the work don for a few beers, go for it.

[roketrhino900]

Re: Wiring

I've gone for the deal, a few questions regarding design:
1. I can't find a size for featherweights, is there one? Or can I choose any as long as it does not obscure the match?
2.Do weapon restraints add to the weight penalty?
Thanks in advance, George

[billy breach]

Re: Wiring

Read the build rules they should help. Weight is what you need to master, size doesnt really matter.

To answer the last part its no.

[roketrhino900]

Re: Wiring

Read the build rules they should help. Weight is what you need to master, size doesnt really matter.

To answer the last part its no.

Thanks for your answer, I finished reading the build rules for the 5th time today, they are helpful. As for size, I'm doing about 45cm X 40cm chassis, is that small/large for a featherweight?

[Thunder arrow]

Re: Wiring

That's about the right size.
Just go on the roaming robots website and see what other people have there robots sized.

[blazerbotics]

Re: Wiring

The size of the robot is dictated by the parts you are putting in it as the overall design, you want to keep it as small as possible for strength and weight. Get all your parts together and make a mock-up out of cardboard/wood to get your size and shape.

[roketrhino900]

Re: Wiring

Thanks, I'll see how the model goes. I've been reading build rules, what is a pressure relief?
EDIT: I see, its the complicated name for a bog-standard valve!

[Laser]

Re: Wiring

A pressure relief device (PRV) is a device that relives a set pressure if the regulator fails.