dickylaban Posted December 16, 2021 Posted December 16, 2021 (edited) The review of part # 77107 in NewElementary reminds me of my static model of TMC Dumont. So I challenge myself to build a working one with PoweredUp motor & hub. The model is driven with a PU XL Motor & a PU M motor for the steering. I try to adopt the driving mechanism from the TMC Dumont for this model & it works smoothly, Video can be viewed at here : https://web.facebook.com/LegoKu888/videos/video-electric-hubless-bike/1224850411374345 The steering video at here : https://web.facebook.com/LegoKu888/videos/1283795705467470/ The driving basic concept at here : https://web.facebook.com/LegoKu888/videos/872650606949142/ What do you think ? Edited December 16, 2021 by dickylaban
2GodBDGlory Posted December 16, 2021 Posted December 16, 2021 Very neat! It's great that that Friends part fits in those tires like that. Is it stable enough to actually drive around?
dickylaban Posted December 16, 2021 Author Posted December 16, 2021 59 minutes ago, 2GodBDGlory said: Very neat! It's great that that Friends part fits in those tires like that. Is it stable enough to actually drive around? Thank you. Yes, the 46335 tire wrap around nicely into the frame and make it possible to rotate & very stable when drive around. Please visit my facebook page to view the video. The position of the mounting point of the frame also take part in order to make the tire rotate, I mount 4 pieces 1L liftarm as bearing at mounting frame to help the tire rotate smoothly. I have try to change the mounting point to lower level (as the front wheel of the TMC), and it didn't work since it produced a lot of fraction.
2GodBDGlory Posted December 16, 2021 Posted December 16, 2021 As for the video, I think you might have made a mistake with your links. Is there supposed to be one showing it driving? I see you have an identical link for both the general video and the driving concept, so I think you might have copied the wrong one for the general video. I'd love to see it work, though!
dickylaban Posted December 16, 2021 Author Posted December 16, 2021 4 hours ago, 2GodBDGlory said: As for the video, I think you might have made a mistake with your links. Is there supposed to be one showing it driving? I see you have an identical link for both the general video and the driving concept, so I think you might have copied the wrong one for the general video. I'd love to see it work, though! I just check the link & it works. I have modified the link in order to make it easier for you to watch it. If you have a facebook account, you can see more picture & explanation about the model in my page : legoku888
Andman Posted December 16, 2021 Posted December 16, 2021 Any chance to upload the video somewhere else than Facebook?
dickylaban Posted December 16, 2021 Author Posted December 16, 2021 2 hours ago, Andman said: Any chance to upload the video somewhere else than Facebook? Why ? is the link broken or you can not access the link ? If you want it, I can send it to your email. You can send your request to me via : dickylaban@hotmail.com & I will send you a copy of the video.
Andman Posted December 16, 2021 Posted December 16, 2021 It's just a personal preference. Everything related to facebook is blocked in my home network :-) Will send you a message later today.
aFrInaTi0n Posted December 16, 2021 Posted December 16, 2021 @dickylaban I replied to one of your fb posts, nice work already! Have you already done some tests with more rpm to see if the construction with the 77107 parts working out at high speeds? Funnily I am currently thinking about the same topic.. I would even try to get the rim out too and just have the rubber wheel be driven hub- and rimless.. I will test this in the next week. Lets find out if the rubber alone will withstand the applied forces.. :D Regards!
dickylaban Posted December 17, 2021 Author Posted December 17, 2021 7 hours ago, aFrInaTi0n said: @dickylaban I replied to one of your fb posts, nice work already! Have you already done some tests with more rpm to see if the construction with the 77107 parts working out at high speeds? Funnily I am currently thinking about the same topic.. I would even try to get the rim out too and just have the rubber wheel be driven hub- and rimless.. I will test this in the next week. Lets find out if the rubber alone will withstand the applied forces.. :D Regards! Thank you. I am happy to know that you also have an idea to try it without the 77107 parts. Please share the result after you try it with the wheel.
dickylaban Posted December 18, 2021 Author Posted December 18, 2021 This is the driving mechanism for the rear wheel. I replaced the white rubber band with 0.5" O-ring (non-lego part) to obtained a better grip to the tire. The structure is the best I can achieve for a good scale ratio for the bike.(compact size) if you have better solutions, please share it. The black gear is connected to the same one mounted on the PU XL motor. The red 1L connector (4 pcs) is use as the bearing for the tire.
dickylaban Posted January 6, 2022 Author Posted January 6, 2022 (edited) I made some changes when I create the building instructions. You can get it by PM me in my facebook page. Edited January 6, 2022 by dickylaban
Johnny1360 Posted January 6, 2022 Posted January 6, 2022 I was wondering that too, possible it turns just by leaning?
amorti Posted January 7, 2022 Posted January 7, 2022 (edited) 11 hours ago, Zerobricks said: How do you plan to steer the model? I'm thinking much like a trike IRL. 1) Avoid needing to steer, ever, especially hard, at all costs. 2) If that fails, wrestle the front wheel in the direction you want to go, and pray to all your favourite gods that it doesn't ignore you, nor flip. The trouble with this is the steering motor seems pretty violent, so there's a fair to good chance the bike will topple at the first steering input. 49 minutes ago, Johnny1360 said: I was wondering that too, possible it turns just by leaning? Probably not. There's no kind of rake angle to make it want to self balance, and it's not fast enough even if there were. Even if it's not actually a motorcycle insofar as it can't drive like one, it's still a cool demonstration of a hubless wheel. @dickylaban thanks for sharing. Edited January 7, 2022 by amorti
Johnny1360 Posted January 7, 2022 Posted January 7, 2022 Oh yeah, absolutely cool concept, I have actually toyed with the idea myself, never close to anything like this though. And I also didn't consider, no rake on the front wheel, for steering, maybe something to think about for future builds.
dickylaban Posted January 7, 2022 Author Posted January 7, 2022 (edited) 13 hours ago, Zerobricks said: How do you plan to steer the model? The steering is a push-pull method, it formed a parallelogram where the steering rod parallel to the wheel's mounting rod. here's the video : 2 hours ago, Johnny1360 said: I was wondering that too, possible it turns just by leaning? Yes. but you need to add some side wheel to prevent it falling sideways. :) 1 hour ago, amorti said: I'm thinking much like a trike IRL. 1) Avoid needing to steer, ever, especially hard, at all costs. 2) If that fails, wrestle the front wheel in the direction you want to go, and pray to all your favourite gods that it doesn't ignore you, nor flip. The trouble with this is the steering motor seems pretty violent, so there's a fair to good chance the bike will topple at the first steering input. Probably not. There's no kind of rake angle to make it want to self balance, and it's not fast enough even if there were. Even if it's not actually a motorcycle insofar as it can't drive like one, it's still a cool demonstration of a hubless wheel. @dickylaban thanks for sharing. Thank you, This model works as a real motorcyle does, you can see it here : Edited January 7, 2022 by dickylaban
amorti Posted January 7, 2022 Posted January 7, 2022 5 hours ago, dickylaban said: This model works as a real motorcycle does, you can see it here : Well, I've seen it drive forwards and backwards and I've seen the steering mechanism, but I haven't seen it do both at the same time like this one
aFrInaTi0n Posted January 10, 2022 Posted January 10, 2022 On 1/7/2022 at 2:48 AM, dickylaban said: This model works as a real motorcyle does, you can see it here Sorry but this won't be true - your direct steering approach will never work "as in real life" After watching this viedeo you know what I am talking about...
dickylaban Posted January 11, 2022 Author Posted January 11, 2022 (edited) On 1/7/2022 at 2:31 PM, amorti said: Well, I've seen it drive forwards and backwards and I've seen the steering mechanism, but I haven't seen it do both at the same time like this one Unfortunately I have dismantle the build. You can buy the building instructions to prove it. Your model only works with buwizz. 6 hours ago, aFrInaTi0n said: Sorry but this won't be true - your direct steering approach will never work "as in real life" After watching this viedeo you know what I am talking about... I understand you still can not understand how my steering works, it works as the "hub steering" system does. I re-designed it with moving the pivot of turning from center of the wheel to the back side.The following article will explain the "hub steering" :https://www.cycleworld.com/wrap-your-head-around-this-hub-steering-motorcycle-from-revival/ I hope this helps you to understand how it works & learn more advance technology in motorcyle world's. If you still didn't get it, buying the instructions is the best way to learn & prove it. FYI: the building instruction is available in limited offer. (only for qualified builder) Edited January 11, 2022 by dickylaban
amorti Posted January 11, 2022 Posted January 11, 2022 (edited) 7 hours ago, dickylaban said: Unfortunately I have dismantle the build. You can buy the building instructions to prove it. Your model only works with buwizz. I understand you still can not understand how my steering works, it works as the "hub steering" system does. I re-designed it with moving the pivot of turning from center of the wheel to the back side.The following article will explain the "hub steering" :https://www.cycleworld.com/wrap-your-head-around-this-hub-steering-motorcycle-from-revival/I hope this helps you to understand how it works & learn more advance technology in motorcyle world's. If you still didn't get it, buying the instructions is the best way to learn & prove it. FYI: the building instruction is available in limited offer. (only for qualified builder) When I say "it won't work" I don't mean whether the thing drives forwards and backwards or whether it steers the front wheel left and right, I've seen it do that. I mean whether it does both together at the same time, balancing like a real motorcycle (or balancing at all). I don't need to pay 25€ to learn that your 200 piece model can't do that, and nor does anyone else - if it worked, you'd have made a video. Mine works with a buwizz or a Chinese battery. No it won't work with a Lego battery, but I don't see it as an issue, many MOCs require buwizz. For 3€, you can prove it if you're a qualified builder You don't need to explain me hub centred steering. It looks like yours would work like a real one, but there's simply no way it can, because you're trying to force the bar left when you want to go left, which isn't how motorcycles works (see Afri's video above). Your only chance to prove me wrong is to post a video of your bike, running and steering, without falling over. Edited January 11, 2022 by amorti
howitzer Posted January 11, 2022 Posted January 11, 2022 I would never buy instructions for a supposedly driving and steering RC-motorcycle MOC without seeing a good video of it in action.
aFrInaTi0n Posted January 11, 2022 Posted January 11, 2022 (edited) @dickylaban First of all you are wrong regarding the Fast Street Bike - it has much flexibility when it comes to batteryboxes. Buwizz 2 (I think even 3) and all chinese brands 8x4 boxes can be used. Regarding your design: I think if one claims something to be working that person has to do the proof of it. Sorry but here is my personal opinion: "Oh I disassembled it already" seems like an easy excuse - at least I would be triggered to deliver proof I one challanged me with this - or clearly statethat my claims were wrong. Also charging 25 USD for a manual of a not-really-driving-(or-not-having-a-proof)-motorcycle feels very overpriced to me. Edited April 18, 2022 by aFrInaTi0n
Johnny1360 Posted January 11, 2022 Posted January 11, 2022 Seems like it would be very easy to rebuild it anyway, since there are instructions and not a great number of pieces. I would also expect to see the model in action, proof of function, before purchasing instructions as well. I do know that to turn a two wheeled vehicle, effectively, it needs to lean into the turn. I do like the looks of this model and the entire concept as well and will likely create something similar in the future.
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