Rockbrick Posted February 5, 2015 Posted February 5, 2015 Rigged this up quickly to test some front suspension/steering solid axle to be as similar to real trucks as possible. I now understand why so many use 'normal' steering... took a while too to get the rear wheels parallel... Then coincidentally the lego MB Arocs 3245 came along and seems to have at last produced a truck with realisting live axles all around..... anyhow we will see how this progesses... its just a proof of concept at the moment - i'm no good at body work it drives quite well the rear axles are mirror images of eachother.... Quote
OG_technic Posted February 5, 2015 Posted February 5, 2015 This is pretty cool, but in my (humble) opinion it would be even more realistic if you could mount the pitman arm at angle and incorporate ackerman steering geomtery. Shouldn't be that hard since you don't have to worry about the tie rod being perfectly straight anymore. Quote
Rockbrick Posted February 5, 2015 Author Posted February 5, 2015 This is pretty cool, but in my (humble) opinion it would be even more realistic if you could mount the pitman arm at angle and incorporate ackerman steering geomtery. Shouldn't be that hard since you don't have to worry about the tie rod being perfectly straight anymore. Thanks, I agree ackerman would be nice.... I might move the steering the other way around and have the arm control in the middle and the connection to the steering nearer the wheel as it fouls the tyre on full lock at the moment... Quote
Sylvian Posted February 5, 2015 Posted February 5, 2015 That looks pretty good, i like the front axle. I wonder though, what holds the two rear axles in place apart from the springs and drive axle? Quote
Rockbrick Posted February 6, 2015 Author Posted February 6, 2015 (edited) That looks pretty good, i like the front axle. I wonder though, what holds the two rear axles in place apart from the springs and drive axle? Thanks! Just the springs and the drive axle at the moment - it could do with perhaps a panhard rod at the back - but to my suprise its quite stiff and stable I originally had 6 springs but got it down to 4 at the back and its still good - its a heavy duty truck so its stability will be better the more weight on it at the back I might not ever do a body for it - but a flat bed with hydraulic lifter and a cab stolen from a standard lego truck (there have been many) is very tempting (So far I am using all parts from 8421 exception of a few small parts and extra pair of tyres) Edited February 6, 2015 by Rockbrick Quote
Sylvian Posted February 6, 2015 Posted February 6, 2015 A panhard rod sounds nice,. But i think you could add maybe two beams just to make sure the axles dont move from front to back or vice versa. (And it looks nice i think ) Those four springs and the way you mounted them are allready rigid enough before using a panhard rod i think. Goodluck with your build! Quote
Rockbrick Posted February 13, 2015 Author Posted February 13, 2015 Small Update to test chassis out before going back to being 8421: Quote
Nalyd997 Posted February 14, 2015 Posted February 14, 2015 Nice! I spy a buggy motor, it wouldn't destroy stuff would it? Quote
MajklSpajkl Posted February 14, 2015 Posted February 14, 2015 The chassis looks fantastic, but I find the csb too small. How fast is it with those worm gears on RC motor? Quote
Rockbrick Posted February 14, 2015 Author Posted February 14, 2015 Nice! I spy a buggy motor, it wouldn't destroy stuff would it? Thanks, It has in the past hence worm gears this time and so far so good.... The chassis looks fantastic, but I find the csb too small. How fast is it with those worm gears on RC motor? I agree it should be taller, but i am using parts from 8421 only and ran out of pieces Its not too slow, I geared it up a bit but the ground clearance is not too great, will do a video soon... Quote
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