[CONCEPT] Wheels with Proper Offset

[Saberwing40k]

So, I was fooling around with one of my many bins of parts, and I came across some X-pod parts, specifically these:

Milan had me thinking about building wheels with good and realistic offset, and that got me thinking, would this fit in a 94.8 tire?

As it turns out, it totally does. And, it's a pretty nice fit. I can't move the tire relative to the wheel at all.

Wheel Idea by Saberwing007, on Flickr

Wheel Idea by Saberwing007, on Flickr

One thrown together hub piece later, and you can see that the pivot point is now a whole lot closer to the center of the tire.

Wheel Idea by Saberwing007, on Flickr

Also, a turntable would totally fit in here. I just don't have one lying around to show.

[aminnich]

Good idea! It is a creative wheel/tire combo, that for sure. But i do have a question of curiosity;

What does getting the pivot point closer to the center of the tire do?

[Saberwing40k]

This .gif is worth a thousand words:

Courtesy of Mahjqa, this animation shows that if the pivot point of a wheel is closer to the center of the wheel, then the fenders can be made much tighter. This is important for making models look correct. A problem with some models is that if the wheel wells are too large, it makes the wheels look out of proportion. Aside from looks, having the pivot point in the center reduces tire scrub, and make it easier to steer the vehicle, while reducing bump steer.

[aminnich]

Ok that makes a lot of sense, i have to increase my level of love of this now, haha. That's an easy solution to a big appearance issue. Great work

[TheItalianBrick]

Courtesy of Mahjqa, this animation shows that if the pivot point of a wheel is closer to the center of the wheel, then the fenders can be made much tighter. This is important for making models look correct. A problem with some models is that if the wheel wells are too large, it makes the wheels look out of proportion. Aside from looks, having the pivot point in the center reduces tire scrub, and make it easier to steer the vehicle, while reducing bump steer.

Sorry but that's definitely not the main point!!! It's not about how cool the thing looks like...it's about how differently it works! When offsetting a wheel we generate positive, negative or zero scrub radius. With zero scrub radius there is very little or almost no kickback from bumps,

a positive/negative scrub radius will create more kickback from bumbs at sensible degrees. The good thing is that it provides more road feelings....that's why it's used by race cars.

It also effect the turning radius as change due to the toe angle.

Anyway it's a good thing to go deeper into the topic by looking at videos and explanations.

It's such a complex and huge topic!!

Edited October 22, 2015 by TheItalianBrick

[Rockbrick]

see this thread too:

http://www.eurobrick...showtopic=98037

centre point was easier to steer in real cars with no power steering, also torque steer is reduced on accellerating and braking

Edited October 22, 2015 by Rockbrick

[braker23]

That's an awesome idea, but how would these wheels hold up under high torque? Did you test the tire slippage? My main interest is Truck Trial ;)

[Vectormatic]

Awesome find!

Id love for lego to put out some large rims which allow for the turn point to be inside the wheel rather then outside

[MajklSpajkl]

So, I was fooling around with one of my many bins of parts, and I came across some X-pod parts, specifically these:

What is this part again? Can you please provide more info.

Thx,

Miha

[Jurss]

http://lego.wikia.com/wiki/X-Pod

http://brickset.com/parts/4218533

Edited October 22, 2015 by Jurss

[MaxSupercars]

Saberwing... interesting Idea... I must test it if I got the parts... :)

Max...

[Kristof]

Brilliant idea, thank's a ton for sharing! I walways wonder how do you people come up with such inventive ways to use certain parts, especially these parts that I barely know about or almost don't consider a part :D

[hadidi1999]

I am finally writing this! So, what I wanted to say was that a couple days ago I stumbled on this thread, and one day later I stumbled on this New Elementary Review of the Jurassic World Dilophosaurus Ambush set 75916.

And then I though, "Well wouldn't that Sphere make an even better wheel?"

So, that is what I thought, I would love to see someone try it out. Maybe with a video of the results this time?

That is it.

[BusterHaus]

So, that is what I thought, I would love to see someone try it out. Maybe with a video of the results this time?

It won't work. The tire twists on the ball much too easily:

[Didumos69]

This .gif is worth a thousand words:

Courtesy of Mahjqa, this animation shows that if the pivot point of a wheel is closer to the center of the wheel, then the fenders can be made much tighter. This is important for making models look correct. A problem with some models is that if the wheel wells are too large, it makes the wheels look out of proportion. Aside from looks, having the pivot point in the center reduces tire scrub, and make it easier to steer the vehicle, while reducing bump steer.

Sorry but that's definitely not the main point!!! It's not about how cool the thing looks like...it's about how differently it works! When offsetting a wheel we generate positive, negative or zero scrub radius. With zero scrub radius there is very little or almost no kickback from bumps,

a positive/negative scrub radius will create more kickback from bumbs at sensible degrees. The good thing is that it provides more road feelings....that's why it's used by race cars.

It also effect the turning radius as change due to the toe angle.

Anyway it's a good thing to go deeper into the topic by looking at videos and explanations.

It's such a complex and huge topic!!

A very nice idea, although I can't judge the stability of the whole thing. As far as I can judge the photo's, I also see that the ball joints of the hub are still not positioned on the center plane of the tyre. A custom wheel hub might be inserted into the wheel even deeper and could be combined with kingpin inclination, bringing the whole setup even closer to true center point steering.

I wonder if this would fit (it does fit the rim for this size tyre):

LDD-file

[hadidi1999]

It won't work. The tire twists on the ball much too easily.

There goes my only chance of revolutionizing Lego Technic wheels and hubs. It was a nice experiment though. Maybe wider or bigger tires would do, Something like Tumbler tires( I just happen to have the Bat-Pod, just need that Jurassic World Ball), or the anticipated new Xerion tractor Wheels? I don't know.

[BusterHaus]

Maybe wider or bigger tires would do, Something like Tumbler tires( I just happen to have the Bat-Pod, just need that Jurassic World Ball), or the anticipated new Xerion tractor Wheels? I don't know.

I doubt they would be any better. The issue is not the width, it's the lack of a bead groove on the ball. The bead isn't very resistant to twisting unless it is held in place, so this problem will exist unless you use a rim with grooves.

[hadidi1999]

I doubt they would be any better. The issue is not the width, it's the lack of a bead groove on the ball. The bead isn't very resistant to twisting unless it is held in place, so this problem will exist unless you use a rim with grooves.

I know but I thought maybe wide enough tires could get some grip on the satellite dish at the end of the sphere.