Ofsted/my friendly uncle/I don't know

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mole55
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Re: Ofsted/my friendly uncle/I don't know

Post by mole55 »

It won't break the sound barrier. The drag goes up exponentially as you approach the speed of sound. Unless you start designing the bar to reduce transonic drag, which will be nigh-on impossible without an aerodynamics degree, you'll max out at 550-600 mph tip speed tops.
Occashokka
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

Degree level aerodynamics here I come :) nah I'm going to design it so it could max at 680 but make it drag/downforce heavy so it only does like half that and doesn't fly
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

Pre-AWS update:

Babymetal: very slight chamfering of the back so it can be tilted further before beached and I have replaced the old scoop with a new hinged one which can also fall to the floor when upside down, will try and post a picture when it's finished

Exuberant:In order to fix an issue I ripped the whole electronics out the chassis and reconfigured it so it's now a firestorm style flipper, but 2 pieces of metal with 2 different hinges, who knows how it'll perform but it's temporary and a bit more interesting

Buffy: haven't changed anything but I've found out how to make it turn on properly every time and we are still trying to engineer some sort of motor protection that weighs 2g or less.Possibly sponge

Sorry for randomly long post :p
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Occashokka
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

How easy is it to add a second servo? Do you just solder both directly onto the pins?
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Occashokka
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

So I'm probably ditching the plan that need 2 servos (a elastic flipper) but for the new Buffy I need to know where I could source 1mm x ~400mm x 16mm of hardox, nothing at all suspicious about needing 16inches of spinner blade material, right?
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Shakey
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Re: Ofsted/my friendly uncle/I don't know

Post by Shakey »

1mm Hardox doesn't exist. The thinnest still made is 3.2mm, a few bits of stray 2mm around.
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Occashokka
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

That's the 1 things you weren't supposed to say Alex, I had just designed something spectacular
:(

How expensive is 2mm Ti?(weighs about the same)
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

1. Do people think a 3mm titanium rod would hold up as a spinning device and how bendable and/or hingeable or attachable is it

2. Do the rules ban sharing of parts between robots I.e having 2 modular robots and having weapons used on both at some point that day
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BeligerAnt
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Re: Ofsted/my friendly uncle/I don't know

Post by BeligerAnt »

1. I think you'd need some sort of hub to fit the motor, with a cross-drilling to take the Ti rod. A 3mm Ti rod would probably be strong/stiff enough but it wouldn't have a lot of mass. You'd want a big heavy weight on the end of it! :D

2. There are no rules against sharing parts within a team, but bear in mind that it could give you a common "failure" point in your team. Not quite as bad as having a single (flat/damaged) battery shared between robots but you get the idea...
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Occashokka
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Re: Ofsted/my friendly uncle/I don't know

Post by Occashokka »

I'm looking at having two identical (except colour) bots and having, say 5 different attachments each designed especially to fight a certain type of bot and just pick one for each fight based on what it's fighting.

As for spinner stuff, the spinner would weigh 40g which is plenty, and yes it's goin to be *that* big, my issue will be machining it as I could really do with a 90 degree bend and also I need to hinge it, you can hinge it in a way it goes against the hinge so won't fold back in, so will retain the shape while spinning but I don't know if I can design or buy a hinge that can absorb impact(the hinge would be between about 5-10mm high of a sheet metal and the rod so there will be a bit of an attachment surface)
Team Badger
Has a 3d printer now yay
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-cool modulated printed thingy
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