featherweight shells

Something to tickle your fancy.

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tweedermeister
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Re: featherweight shells

Postby tweedermeister » Tue Dec 20, 2011 9:50 pm

it's ok now i'm getting a polycarb shell and i'm going to extend the wedge with hardox once I get it and add hdpe skirts like panic attack and for the uk champs i'm going to use steel skirts

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terminaldamage
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Re: featherweight shells

Postby terminaldamage » Tue Dec 20, 2011 11:42 pm

To be perfectly honest, I wouldn't bother with skirts. They're a waste of material and weight.
Have a look at the current crop of active featherweights. None of them (even the pushers) have skirts. There are a few reasons for this, some of which include;

- uneven floors. If you compete at Roaming Robots or Robots Live events, the chances are the floor will have taken a battering from the heavyweights, so there will be several bumps and uneven patches that skirt edges will easily get caught on. If they don't there's still a chance that there will be gaps underneath the skirts at certain points on the floor, rendering them pointless.
- self-inflicted immobilisation. Unless your skirts are made of pretty thick material, there is a likelihood they will get bent from impacts. They will then either scrape along the floor, hindering your driving abilities, or get bent in underneath your wheels, leaving you beached and unable to move.
- ineffectiveness. The flattest floor for featherweights is the Robo Challenge arena, which means that not only will your skirts be flat against the floor, but so will many flipper blades. If your skirts are on hinges, they're only held down by gravity, whereas most flipper blades will be held down partially with bungee cords. In a head-to-head clash, the held-down flipper blade is more likely to get underneath the flappy skirt.

Add to that the general maintenance (which will be regular if they're thin and keep bending) and they seem to be much more hassle than they're worth.

Just my tuppence worth anyway.
Jamie McHarg
RogueTwo Robots
www.rogue-two-robots.vze.com

With great power, comes great reliability.

tweedermeister
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Re: featherweight shells

Postby tweedermeister » Tue Dec 20, 2011 11:49 pm

what do you think I should do then because the wedge will obviously scrape the ground but the sides and back have quite high ground clearance so how will I lower the ground clearance or make a substitute for it ?

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terminaldamage
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Re: featherweight shells

Postby terminaldamage » Wed Dec 21, 2011 12:09 am

Just keep the wedge pointed at opponents at all times if possible. It doesn't matter if it's a melee or one-on-one fight, your robot's gonna get flipped, regardless of how much or how little ground clearance you have. I don't know the shape of the robot but if possible, design it so that it can run upside down.

Alternatively, rather than making hinged skirts, make some solid side panels that screw directly on top of your existing side panels, but are a few millimetres taller than the current ones (or however much of a gap there is to cover). This way you can make the panels thicker, not have to worry about hinges and things getting bent, and reduce your ground clearance as well.
However to stand a chance of not getting stuck on the RR or RL arena floors, I'd recommend a minimum ground clearance of 5mm. Most of my robots tend to have 8mm-10mm of clearance and getting beached isn't usually a problem.
Jamie McHarg

RogueTwo Robots

www.rogue-two-robots.vze.com



With great power, comes great reliability.

tweedermeister
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Re: featherweight shells

Postby tweedermeister » Wed Dec 21, 2011 12:14 am

It can run upside down and has 6mmground clearance all over before I get the wedge extender made

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terminaldamage
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Re: featherweight shells

Postby terminaldamage » Wed Dec 21, 2011 12:16 am

In that case I wouldn't bother trying to reduce the ground clearance. Add the wedge extender and have 0mm at the front, but I'd keep the 6mm round the sides as it will save you a lot of grief in the arena.
Jamie McHarg

RogueTwo Robots

www.rogue-two-robots.vze.com



With great power, comes great reliability.

tweedermeister
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Re: featherweight shells

Postby tweedermeister » Wed Dec 21, 2011 12:19 am

Ok I'll just do that then, thanks

anttazz
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Re: featherweight shells

Postby anttazz » Wed Dec 21, 2011 12:19 am

We saw a video of his FW at the weekend Jamie, was the one next to the Reaper feather shell. Nice simple 4WD shell to start with, can't go too wrong with it the way it was when we saw it and at least it'll get you in the arena.

tweedermeister
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Re: featherweight shells

Postby tweedermeister » Wed Dec 21, 2011 12:44 am

There's also a vid of it called bulldozer drives again ( mine will be faster because it's going to be running 12v drills on 18v)

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Team Invade
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Re: featherweight shells

Postby Team Invade » Wed Dec 21, 2011 9:27 am

Jamie's right, a pusher will always get flipped :wink:
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haz
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Re: featherweight shells

Postby haz » Wed Dec 21, 2011 11:31 am

will probably be about the same speed actually

tweedermeister
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Re: featherweight shells

Postby tweedermeister » Thu Dec 22, 2011 8:56 pm

decided that after i've been to some events and had some practice with minor tom i'm making minor tom a crusher with around 500kg of power ( watch out explosion :wink: )

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Team Invade
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Re: featherweight shells

Postby Team Invade » Thu Dec 22, 2011 10:29 pm

tweedermeister wrote:decided that after i've been to some events and had some practice with minor tom i'm making minor tom a crusher with around 500kg of power ( watch out explosion :wink: )

Yeah right :P

And you plan to do that how?
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tweedermeister
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Re: featherweight shells

Postby tweedermeister » Thu Dec 22, 2011 10:35 pm

get the strongest linear actuator I can find and do alot of maths to work out the best blade i can make for it in terms of dimensions to maximise crushing power

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bitternboy
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Re: featherweight shells

Postby bitternboy » Sat Dec 24, 2011 4:08 pm

If this is a featherweight, good luck, it can be done.
If it is an ant, don't go there. Seriously.
Jonathan
Before you criticize another person, first walk a mile in their shoes. Then, when you critisize them, you'll be a mile away and have their shoes.


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