Posts by maddox

    The 190/200 is an about indestructable ESC, Team RCC is using them since Valkiri 2

    And even with a small supply in our spare part/project box, never had one fail.

    On motors. Why the limit on 40mm length? In Nebelwerfer we have a 3650 inrunner. 90° gearbox tough.
    DX11 and DX12 use the NTM5060 370KV or SK3 5055 500KV

    Oh well. Getting Nebelwerfer ready for FACTS.

    Armor will go from 5mm on the thinnest spots to 6mm. Just to be sure. To compensate this, the 30mm part is reduced to 20mm
    Most aluminium is removed, and replaced with more titanium.

    Batteryspace is increased with 30%

    The spaghetti wiring is being rerouted and upgraded to "Wet Noodle".

    Oh, that kind of job is not unknown to me. Worked a few months on Case and Poclain excavators and simular machines. Got a story from one of the "old hands". They tried nylon and simular bushings to lower mainetance and cost. (Bonze is expensive compared to most plastics)

    The hardened shafts wore out superfast. Every bit of sand and such that got in between shaft and bushing got embedded in the plastics and formed a kind of grinder.

    Warning Bredero, the way those are build is less "weight" consious.

    I did build vacuüm chambers (and other parts/tools) to help with casting silver, bronze/brass/copper and even gold.

    What reminds me. Need to find a steel tube 300mm inner diameter 250mm length, 5mm wall.

    304 is rather soft.... And can't be heat treated to give it a harder surface. (unless you get very fancy with plasmacoating, cementing, cladding or simular technologies)
    Is more expensive than carbon steel or even Hardox.

    One redeeming feature. It's heavier than carbon steel.

    I hope you'll return, ready to kick robot ass and have a good time with the rest of the roboteers.

    You joined a exclusive club as a roboteer...


    Simplicity and cost. Wear isn't an issue, and friction loses in modern bronze "oil" bushings are not crippling.

    As I said in the past, if bronze bushings were good enough for 40 000 ton+ Battleships, it should be good enough for us. (I have to admit, bronze was used for the 100rpm drive shaft bearing, the 1000ton+ turrets rotated on roller bearings, for 1rpm...)

    If you make the equation between ease of use*, weight, reliability and cost, bronze bushings beat the snot out of any ball, needle or roller bearing.

    On the other side, we added trust needle bearings in Nebelwerfer as an upgrade, and we like the effect. But we keep bronze rings as replacements at hand.

    * Turning a bronze bushing to size in a hardox disk is simple.
    Adapting a ball/needle/roller bearing to fit the laser/watercut hardox hole, or finishing the hardox part , that's another story.

    Hannover came.

    Perun had 1 failure. The 2 motors uncrewed themselfs from the frontplates. Still, 3th place with a non pushing brick.
    Just getting more motorsupport, and Perun is ready for FACTs.

    Nebelwerfer. Look at the opponents, and that with only worn out belts as damage.

    We didn't even lose any wheels this event...

    After Dortmund Life had other plans for Team RCC.

    But with Hannover comming up, we got together and started on Nebelwerfer earlier this evening.

    Armor looks chewed, but isn't weakened. So, we're still running the original parts. We'll replace the stickers tough. And maybe add some extra .

    The disk. Bushings are cracked and running on Ti is wearing them out faster than expected. So, we installed the spare disk, and the old one is getting new bushings later this weekend, becoming the spare. Try that with bearings, 4 events , and still working.

    Frame. 6mm Ti. Nothing to see, repair or replace.

    Electronics. Replaced some gaffatape labels and connector taping. Tested the whole, and we declare Nebelwerfer 4 ready.

    Perun. The wonky scoop-slider plate is replaced with a nicely curved one. Now to drive a few kilometers over road to grind it down.
    All the rest, just like Nebelwerfer, looks chewed, but nothing wrong in itself. Some new stickers ,and ready to rumble.

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    Since a few years Team RCC uses a cross between a torsion bar and leaf spring suspension. We call this the T-frame setup. Hannibalito 3 mk IV used it extensively, and I doubt anyone will call H3 unsuccesfull.

    Allied teams took the system over, and the results don't lie.

    Due the light weight of this construction methode, it is easely adaptable to 4 or even 6WD setups.