VKTechnic Posted October 11, 2015 Posted October 11, 2015 Hope the name doesn't give the car away, but I'm back to building! Here's the first prototype of the rear axle: Version 1 by VKTechnic, on Flickr Just a few small revisions need to be made (such as strengthening the sway bar mount), but the suspension is functional and even has proper geometry! Front axle is coming soon (ish). Quote
Doc_Brown Posted October 11, 2015 Posted October 11, 2015 ooooh. :D Does the new pneumatic help a lot? Quote
Kman860 Posted October 11, 2015 Posted October 11, 2015 Will those pneumatics actually overcome the strength of the springs? Quote
VKTechnic Posted October 11, 2015 Author Posted October 11, 2015 On 10/11/2015 at 3:15 AM, Kman860 said: Will those pneumatics actually overcome the strength of the springs? Overcome? In what sense? On 10/11/2015 at 2:45 AM, Doc_Brown said: ooooh. :D Does the new pneumatic help a lot? Helps with making this realistic, yes. Quote
skppo Posted October 11, 2015 Posted October 11, 2015 On 10/11/2015 at 3:15 AM, Kman860 said: Will those pneumatics actually overcome the strength of the springs? I assume the pneumatic cylinder is used as a shock absorber, not as some sort of adjustable suspension. Quote
Vectormatic Posted October 11, 2015 Posted October 11, 2015 That is an awesome looking axle, im impressed with the ARB design, and the pneumatic shock absorber My only concern (from my own vantage point) is that the design is rather high, one problem i ran into on modding 42039 is that in race cars especially, you need axles to be low and thin to get them into a decent bodywork shape, so im very curious what kind of car this thing is going into Quote
Lipko Posted October 11, 2015 Posted October 11, 2015 Looks very good, but what is that stabilizer thing there (with the push rods)? You effectively locked the left and ride side together, or do I miss something? And won't that one-stud axle connection of the wheels too weak for such a big car? Quote
Vectormatic Posted October 11, 2015 Posted October 11, 2015 On 10/11/2015 at 7:29 AM, Lipko said: Looks very good, but what is that stabilizer thing there (with the push rods)? You effectively locked the left and ride side together, or do I miss something? It prevents body roll in corners, in real life the will be rubber bushings, or in the case of an anti-rollbar, a bar which can be torqued a bit to not link both sides 100% Quote
Lipko Posted October 11, 2015 Posted October 11, 2015 On 10/11/2015 at 7:45 AM, vectormatic said: It prevents body roll in corners, in real life the will be rubber bushings, or in the case of an anti-rollbar, a bar which can be torqued a bit to not link both sides 100% I know but it this case it's locked 100% (if you are not relying on bending parts by design) Quote
Zerobricks Posted October 11, 2015 Posted October 11, 2015 That looks like a good start but some questions/remarks. - Why are you using an old differential? - I suggest you to extend teh anti-roll bar pin (#2 connector) so its a bit more flexible and does its job. - Is this going to be a driven axle? - The axle outputs are only 1 stud long, why not use the small wheel hubs? Quote
2LegoOrNot2Lego... Posted October 11, 2015 Posted October 11, 2015 Even though I agree with Zblj's remarks I really love this axle. Looks impressive and great use of the new cylinder!!! Quote
Edwin Korstanje Posted October 11, 2015 Posted October 11, 2015 (edited) I don't hope your building this MEGA car . Edited October 11, 2015 by VFracingteam Quote
Kman860 Posted October 11, 2015 Posted October 11, 2015 On 10/11/2015 at 4:42 AM, VKTechnic said: Overcome? In what sense? Helps with making this realistic, yes. On 10/11/2015 at 7:06 AM, skppo said: I assume the pneumatic cylinder is used as a shock absorber, not as some sort of adjustable suspension. Ya, I realized after, it's part of the shocks, not an adjustable suspension On 10/11/2015 at 1:36 PM, VFracingteam said: I don't hope your building this MEGA car . :laugh: :laugh: :laugh: :laugh: Quote
VKTechnic Posted October 11, 2015 Author Posted October 11, 2015 First, responding to some questions/comments: On 10/11/2015 at 7:12 AM, vectormatic said: That is an awesome looking axle, im impressed with the ARB design, and the pneumatic shock absorber My only concern (from my own vantage point) is that the design is rather high, one problem i ran into on modding 42039 is that in race cars especially, you need axles to be low and thin to get them into a decent bodywork shape, so im very curious what kind of car this thing is going into At ride height, the top of the rear wheels is at the same height as the cylinder body (the inlets stick out 1 above), which should fit under the bodywork. On 10/11/2015 at 7:29 AM, Lipko said: Looks very good, but what is that stabilizer thing there (with the push rods)? You effectively locked the left and ride side together, or do I miss something? And won't that one-stud axle connection of the wheels too weak for such a big car? On 10/11/2015 at 7:45 AM, vectormatic said: It prevents body roll in corners, in real life the will be rubber bushings, or in the case of an anti-rollbar, a bar which can be torqued a bit to not link both sides 100% On 10/11/2015 at 7:56 AM, Lipko said: I know but it this case it's locked 100% (if you are not relying on bending parts by design) There is some slack in the frictionless pin, so it's not "locked". On 10/11/2015 at 10:04 AM, Zblj said: That looks like a good start but some questions/remarks. - Why are you using an old differential? - I suggest you to extend teh anti-roll bar pin (#2 connector) so its a bit more flexible and does its job. - Is this going to be a driven axle? - The axle outputs are only 1 stud long, why not use the small wheel hubs? All of the mounts for shock absorbers and suspension arms were at even stud widths, so it made sense to use the 4-wide diff. There is some slack in the pin that the #2 connector is mounted on, so it still does its job. The axle will probably be driven by 2 XL motors, not sure of the final gearing quite yet. I personally don't like the wheel hubs, as they limit the ability to create realistic suspension geometries. Plus, the wheel hubs have quite a bit of slack. ------------------------------------------------------------------------------------------------------- Now for an update! I stayed up pretty late last night and rebuilt the rear axle using a 3L differential. The sway bar still has some slack in it but not as much as before, which should be nice for the realism factor. I also started working on the front axle, where the main challenge is to keep everything as low as possible. A few revisions still need to be done to limit the travel of the suspension, but the geometry is still accurate and the dimensions aren't far off at all. Version 2 + Front Axle by VKTechnic, on Flickr Progress will be slow for the next few days, as I have work and university classes. I'll keep building when I have the time! Quote
Saberwing40k Posted October 11, 2015 Posted October 11, 2015 (edited) You're not building a Koenigsegg Regera, are you? It's a low, sleek car, and it has been called a Megacar, due to the engine putting out 1 Megawatt of power. Edited October 11, 2015 by Saberwing40k Quote
VKTechnic Posted October 11, 2015 Author Posted October 11, 2015 On 10/11/2015 at 11:37 PM, Saberwing40k said: You're not building a Koenigsegg Regera, are you? It's a low, sleek car, and it has been called a Megacar, due to the engine putting out 1 Megawatt of power. Oooh, you're really, really close. Quote
pluto7443 Posted October 12, 2015 Posted October 12, 2015 On 10/11/2015 at 11:39 PM, VKTechnic said: Oooh, you're really, really close. I think I got it then. A One:1? Quote
VKTechnic Posted October 12, 2015 Author Posted October 12, 2015 On 10/12/2015 at 1:04 AM, pluto7443 said: I think I got it then. A One:1? Nailed it. Quote
Saberwing40k Posted October 12, 2015 Posted October 12, 2015 On 10/12/2015 at 1:08 AM, VKTechnic said: Nailed it. d'oh, I was just about to post that as the other possibility. Well, good luck with it. Maybe you could actually replicate the power:weight ratio, like newtons to grams. Quote
Lipko Posted October 12, 2015 Posted October 12, 2015 With active aerodynamics? Front axle looks very good. I envy you building speed and/or time. Quote
VKTechnic Posted October 13, 2015 Author Posted October 13, 2015 On 10/12/2015 at 4:19 PM, Lipko said: With active aerodynamics? Front axle looks very good. I envy you building speed and/or time. Still unsure about that. It would be really cool to do it, but space is very limited. Rear wing will definitely be adjustable though. Quote
Pvdb Posted October 13, 2015 Posted October 13, 2015 Nice job on the rear suspension incorporating the sway bar. I am also working on a One:1 at the moment (well for the last 6 months). I am using the standard wheel hubs as my end product will no doubt be played with by a 3 year old (he may be 4 by the time it is finished) Anyway, I look forward to seeing how your model develops and I will start a thread with my WIP. Quote
VKTechnic Posted October 19, 2015 Author Posted October 19, 2015 Update time! Back to the drawing board... by VKTechnic, on Flickr Spent an hour or two working on the rear drivetrain and getting a rolling chassis, then I realized that the front axle is 2 studs too wide. Time for a new front axle... Quote
Jurss Posted October 19, 2015 Posted October 19, 2015 Interesting suspensions. But... 1. Isn't it too wide? From this angle it looks so for me. 2. Isn't motors too close to rear wheels? Is ther one stud or even half? From this angle it also looks so. As it's pretty hard to fix wheels, their axles, they could in some cases touch motors at this setup. Quote
VKTechnic Posted October 20, 2015 Author Posted October 20, 2015 On 10/19/2015 at 10:47 AM, Jurss said: Interesting suspensions. But... 1. Isn't it too wide? From this angle it looks so for me. 2. Isn't motors too close to rear wheels? Is ther one stud or even half? From this angle it also looks so. As it's pretty hard to fix wheels, their axles, they could in some cases touch motors at this setup. 1. The front axle is two studs too wide, but aside from that, the proportions are accurate. 2. The motors are a half stud away from the wheels, which should be enough. The current axle design has very little wobble in the wheels. Quote
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