SNIPE Posted March 12, 2015 Posted March 12, 2015 Hi I was just wondering, how come the lego 8258 lorry can steer equally from left to right when the bevel gear driving the gear strip is not in the centre of the gear strip? Very cool set though, busy modding it. I'd say this is very very close to the 42009 in terms of complexity, it has some design techniques that are unique to this set as far as I've seen. Quote
Saberwing40k Posted March 12, 2015 Posted March 12, 2015 It's because of the fact that steering doe not use the full length of the rack, therefore the bevel gear driving it can rotate an equal distance left or right. So, effectively, the bevel gear is driving a smaller gear rack, that is not placed on center. I have actually used the off center gear rack on several creations, because most vehicles are actually like that. Quote
Erik Leppen Posted March 12, 2015 Posted March 12, 2015 The official instructions are on LEGO's own website. www.lego.com, go to the bottom, where you find a link to building instructions, then on that page, enter the set number 8258. Or go to technic.lego.com and you'll find your way there. I'm telling this, because if you have the parts to recreate the steering mechanism, you can use the instructions and build that section yourself. You will learn everything you're asking here, and probably more. If you do so, please come back and tell us about your findings. Quote
DrJB Posted March 12, 2015 Posted March 12, 2015 ... because most vehicles are actually like that ... Precisely Quote
dr_spock Posted March 12, 2015 Posted March 12, 2015 How does it limit how far it goes? When the wheel mounts hit the frame. Quote
ifilin Posted March 12, 2015 Posted March 12, 2015 Designer-Han made several mods for 8258 including the steering - see http://www.designer-han.nl/lego/download/8258%20modification%20package.rar 2 months ago I built this set - it's incredible. :) Quote
SNIPE Posted March 12, 2015 Author Posted March 12, 2015 (edited) I'm adding a differentiall to each axle and hopefully steering and suspention to each axle too. I have tried using the hube from the 8448 with the 7L steering rack but the steering arms are too long. the wishbones were from the green snowmobile of 2014. the wishbones have to be 3x3 in order for them andthe hub to fit inside of the recess of the rims, (the rims are turned back to front ). I will build the setup soon and yeah its probaly the best way to learn. Hopefully the L motor will be suitable instead of the L motor, it is driving the same geartrains though so there's nothing added there. Ill add seperate motors to control the rest of the functions. don't think I want to RC it though, doesn't really suit the set IMO. Does anybody have some ideas on how to have steering, drive and suspention within 13L? Edited March 13, 2015 by SNIPE Quote
flyboy01157 Posted March 17, 2015 Posted March 17, 2015 Hopefully the L motor will be suitable instead of the L motor, it is driving the same geartrains though so there's nothing added there. the L motor or the XL motor or the M motor? Quote
bonox Posted March 18, 2015 Posted March 18, 2015 Does anybody have some ideas on how to have steering, drive and suspention within 13L? have a look in this forum for the general "axle design" thread. There's also a recent one on front wheel drive, which covers the same thing you want. Quote
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