I don't know of any paper. I'm an engineer so I just know how to develop such linkages. I might do a video in the future explaining how to calculate it, but more towards the end of the year.
Great work! Im actually in the process of building a 2WD one myself Im basically at the stage you are at with a "working Chassis" , Just wondering how you went about designing your linkages? Did you do any caluclations for the trail etc or did you just go with what seemed correct? Surprised at how well the 3d printed linkages held up I may have to try that to prototype some different linkage dimensions to see if it makes any differnce to how it rides , Did you just use PLA? 😃
Hey, I did not do any calculations on the linkages at the time of designing them. At least not for things like trail etc. I did do calculations for bearing forces and for the milled aluminium arms I did do FEM analysis to make sure they will hold up. For the next version I will do some trail calculations by calculating the instant center of the front axle. I would also like to do some testing on how different amounts of trail and caster impact the handling. Currently I'm running 15° of caster angle. Having tried 0°, 5°, 10° and 15° of caster angle: 0° is pretty hard to ride, 5° is much improved, 10° is improved again, but not much difference to 15°. That might just be my configuration of trail tho, your results may vary. I too am pretty surprised how well the 3D prints held up. It was indeed just PLA, but with 90% infill. Took forever to print haha. I did the linkage dimensions so the front wheel would have the most amount of articulation possible with the shortest length of linkage arms possible. And I also wanted to stay within the 230mm/9" deck width for the mounts on the frame, so that limited things as well.
Thanks for sharing. I really liked the no power down hill.
Great build, how did you get the geometry for the front steering? Is there a paper you could recommend that i could read
I don't know of any paper. I'm an engineer so I just know how to develop such linkages. I might do a video in the future explaining how to calculate it, but more towards the end of the year.
Thank u for a detailed video i wanted make my own 😁
Great work! Im actually in the process of building a 2WD one myself Im basically at the stage you are at with a "working Chassis" , Just wondering how you went about designing your linkages? Did you do any caluclations for the trail etc or did you just go with what seemed correct?
Surprised at how well the 3d printed linkages held up I may have to try that to prototype some different linkage dimensions to see if it makes any differnce to how it rides , Did you just use PLA?
😃
Hey, I did not do any calculations on the linkages at the time of designing them. At least not for things like trail etc. I did do calculations for bearing forces and for the milled aluminium arms I did do FEM analysis to make sure they will hold up. For the next version I will do some trail calculations by calculating the instant center of the front axle. I would also like to do some testing on how different amounts of trail and caster impact the handling. Currently I'm running 15° of caster angle. Having tried 0°, 5°, 10° and 15° of caster angle: 0° is pretty hard to ride, 5° is much improved, 10° is improved again, but not much difference to 15°. That might just be my configuration of trail tho, your results may vary.
I too am pretty surprised how well the 3D prints held up. It was indeed just PLA, but with 90% infill. Took forever to print haha. I did the linkage dimensions so the front wheel would have the most amount of articulation possible with the shortest length of linkage arms possible. And I also wanted to stay within the 230mm/9" deck width for the mounts on the frame, so that limited things as well.
I made a poor man hub steering for a motorcycle using similar type linkage for the front wheel. I copied rake and trail from my dirt bike geometry.
nice!