Bit of 3D printed fun - portals with underdrive Hello from a long time listner first time caller, I picked up a new (to me) FTX Mini 3.0 / RGT Adventurer v2. I realised straight away that what I should've bought is an SCX24, as the parts / community support is massive. Anyhoooo, as the mod potential without DIY was low, I set about designing my own parts - I'm just that kind of guy So fully 3d printed portal axles with underdrive it is then. Underdrive (rear) ratio is about -20% https://i.imgur.com/uK0IBMMl.jpg Pictured is the smallest reliable prototype of these axles. Design considerations were: - reliable gear mesh (so herringbone) - fully printed (torque load is low in 1/24) - must be essentially "bolt-on" replacements for current wheels so: (1) gears at least 5mm thick to accomodate stock 7mm hex axles (2) must accomodate stock steel axle length without fouling tyre (3) no cutting etc of standard components - must be as small as can be reliable Here they are partly disassembled https://i.imgur.com/41w650Sl.jpg Consequences of this mod: - track is wider than wheelbase! - springs are softer with more articulation due to leverage - portals themselves are chonky, so may hang up? - 14mm lift raises CoG - slight cheating with "bolt-on" requirement - to use underdrive a smaller gear that fits directly to the axle has to be used, instead of the stock 7mm hex (which has to be removed) I hope you like this little adventure in printing - happy to hear comments and questions below |
Re: Bit of 3D printed fun - portals with underdrive That's awesome! Great idea to underdrive it, beyond the size constraints, how's it crawl? |
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