Hi, This is the discussion / build page for the Robolympics 2007 bot. We are looking for ideas, materials, money and expertise. - we will accept anything short of abuse I will update this post with the major design stats so you don't have to scroll thru a long thread.
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Virtual PoP: I will update this post so you can see what we have to work with. The curent PoP is:

Nick: Roboteq 2550 120 amp ESC
Nick: 19mm hardened axle
Nick: Charger PSU
Nick: Seventy CP3600 Cells
Nick: Milling & Fabricating
Nick: Cash

Glen: S. Steel 19mm shaft
Glen: 30mm shaft (what steel?)
Glen: 300W scooter motors?
Glen: Superior Driving skilz
Glen: Dumpster diving

Brett: 7CAP Radio
Brett: 2400 battry packs ?
Brett: Triton chargers

Jake: Electronics/programming
Jake: Welding & fabricating
Jake: Lathe Work
Jake: Wheel hubs & tread
Jake: Possible CP3600 cells

Andrew: RS80D (if repairable)
Andrew: Time & effort
Andrew: Cash

Chris: steel, lots of

Angus: Time & effort

Knight: Programming

Aaron: possibly 3.2mm Hardox

Bisalloy at Jeff J's place

Still Needed or undecided:

Frame construction material
Armour
Wiring harness
Power switch
Drive motors
Gearboxes

Please note: I am adding/deleting stuff from people's contributions in line with the design requirements; it doesn't mean we don't like you or that the material/service might not go back on the list
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Last edited by Nick on Sat Jul 22, 2006 2:07 am; edited 10 times in total

ive got some 16mm stainless steel shaft and 30mm shaft if thats needed.

id be willing to donate the 300w scooters, chains and sprockets for it if no on else can propose a better drive. ive got those pnuematic wheels too but i reckon they would be fairly crappy for a robot.
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

If they are the Oatley ones forget it. They are very brittle.

I think Dumhead andrew took em to make a narkart with Nick, the colsons.
I don't really have much to donate... but I can give time.

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gary - these ones are the same type you get from the trolleys i think, 4 bolts holding them together and pnuematic. i got them from a hardware place for $12 each, but as i said i dont think there that true, the bearings in them look very shoddy and i reckon theyd get punchered in no time flat.

so theres anywhere from Lightweight to super heavyweight. whats everyone interested in?
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http://www.youtube.com/user/HyzerGlen - Videoooozzz

I'd say middle... Buildable and large enough to be spectacular...
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Various problems with bag trolley wheels, the bearings are rubbish, the tube that holds the bearings is only crimped to the rim so it spines etc.

It is going to be a really big job building a competitive big bot given that the big stuff we have locally was just early experimental stuff and even our lightweights are built for a no spinner class.



How about sticking to what we are best at and use a few of the spare Feathers as clusters. As it’s a different weight class you get to drive your other feathers. You guys always liked your tag team events.

I cant think of much I have to *donate* towards such an effort, but I could *loan* a "Team Australia", my US-Ground-Freq-Legal 75Mhz 7C PCM Radio, Battery packs (12v packs - CP2400's x4 and RC3300 x 6) and a rack of 5 Tritons - for the duration of the trip that is.

12v Power for the Tritons would have to be supplied though, as my 20amp supply is a Linear one and wouldnt handle US power.

Given thats over $2K worth of gear, Travel insurance would be nice to see though.

And of course, if you dont know how to program a Futaba 7C radio, then I offer my services as driver

However it occurs to me, that I dont know that I'll be able to stump up the airfare, and seeing as how Glen has said he will, and his Spektrum is just as legal in the states, maybe it would be better .

The batteries and charger offer stands though. We all know what the *expensive* parts of most Robot's are. Radio, Esc, Batteries, Chargers, so that should help.
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If you need any 4140 flat bar, shaft or hollow, I can get it at wholesale + 5% from work Gotta love staff discount

I'm tempted to even donate some 3.25mm Hardox when it arrives... but I'd have to make sure it's going into a worthy design
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Pop updated, thanks all!

Can I presume to put Glen, Jake, Angus, etc down for CAD work?

A thought about the weight: If we build a non-kinetic lightweight, we can fight it back in Australia. If we build anything bigger or kinetic, then its a one use disposable bot as far as Australian comps are concerned. I'm not against a larger bot as such; if it is half way competitive, we can leave it in the states with as many parts as possible and sell it off on the RFL forum. That also saves us the return frieght BTW, which will be expensive for something that size.

Before you go designing your dream combat bot, take Judge Dave's advice on these two points: "Don't bother bringing an untested design" and "Study the opposition". Let's look at the top five bots in the light & middleweight classes and figure out how we would beat them, then come up with a design that can be tested safely.
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

i suggest the wiki as the repository for this bot.
talk about it here but when you change the wiki put a link in to the wiki page.

I'll do software etc, if its legal we can run my radio system, i may go to bluetooth or zigbee (which are legal world wide, but i dont know about RW).

I'll help with welding etc, we have enough space here to store the thing.

what styles are we looking at then.
Spinner - ruled out
flipper
Plan-C style spike
rammer
lifter
crusher
any others?

I don't know how well Plan-C will scale up in terms of height. The shaft in the featherweight is 50mm off the bottom of the bot (excluding armor and clearance) so thats like 60-65 mm and thats already just going to clip cobra.
so scaling that up to a LW would make that say 80 mm.
The power behind it would be truly scary. I am thinking 25mm Ti or SS shaft minimim. Tool steel tip, ~4kg worth of Co2 for lotsa shots.
lol we are talking small cannon here not "big game", Big upside is minimal drive requirements. Needs 2 way radio.

Plan-C style valve works for the flipper (launcher ;->)

Rammer... could be intersting but still... ;-> magnet wheels are a must. I think i have worked out a way we can make them with just flat NiBs and still avoid coging and up the stick force. A123 cells all the way ;-> This becomes more viable if we can get laser guidance running. I may have worked out a way of doing this digitally with just a PIC, photodiode and an amp.

Crusher.
mmm fun ;-> glen we need that actuator ;->
actually i was thinking combined Co2/air pump and hydraulics.
Co2/air for a "snap" closed and hydraulic for the crushing.
weight isnt nice for this though, lotsa bits, and lots of them are heavy, needs lotsa batteries too to power the pump.

lifter.... cmon ;-P
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Other thaught, as the bot will be mostly built in NSW perhaps it can become a NSW bot after the comp, We then help the other states with their State bots, then we have some funky 3 way fun ;->
first team to gang up gets attacked with a peach
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Mechanical engineers build weapons, civil engineers build targets

Thanks Ali, I will get studying.

Personally I like Lifter, then Ram/wedge, then Plan C. Jake would be pretty much in charge of the Plan C effort as only he really knows how it works. For a lifter, we could take the best concepts from Ziggy and Biohazard and make a 4 wheel bot with a four arm linkage weapon, driven by a smaller Plan-C ram or electrics. The Wedge is the easiest and we can increase our chances with high-spec parts like dual Mag 150 drive motors (guess who's paying for them? )
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion