Knuckleweights...

[mattin]

Hey,

i was using Felsenfestknuckles on my berg, but i wanted to lose some of the weight of the frontwheels. So i made some bearingsupports for the knuckles out of brass.


thats nearly 3oz for the komplete knuckle.






Greetings from Germany

Martin

[JeremyH]

Very nice work!

[CRSMacgyver]

Looks good!

[binaryterror]

Great job man!

[Szczerba]

I really like those knuckles/knuckle weights. I am also diggin' those beadlock rings. Those delrin or metal? I am currently messing with some materials to do some of those rings myself.

[53 willys]

NICE!! you had your thinking cap on for those...they look awesome

[rob_b]

Brilliant idea there I'm intrigued to know how it changes the driving experience by taking out the rotating mass yet keeping the same weight bias. If nothing else the throttle must be snappier.

[mattin]

yup...

[renoirbud]

The weights look really good.

So when are the German championships and when are you guys going to start inviting other contries?

[OrphanRods]

Looks nice i really like it!

[JeremyH]

Originally Posted by rob_b

I'm intrigued to know how it changes the driving experience by taking out the rotating mass yet keeping the same weight bias. If nothing else the throttle must be snappier.

And he'll brake a lot less axle parts...

[Harley]

Originally Posted by JeremyH

And he'll brake a lot less axle parts...

Thats not always true. The weight isn't what breaks parts. Its the sudden stops that usually do. Lots of times having that momentum in the wheel helps keep axle parts alive. It is a delicate ballance. But going lighter doesn't always mean you will break less.

[JeremyH]

Originally Posted by Harley0706

Thats not always true. The weight isn't what breaks parts. Its the sudden stops that usually do. Lots of times having that momentum in the wheel helps keep axle parts alive. It is a delicate ballance. But going lighter doesn't always mean you will break less.

Changes in angular momentum (or moment of inertia) is what will break parts. If you increase that momentum (by increasing either the velocity or mass), then you increase your chances of breaking parts. By moving the weight to the knuckles, he takes it out of the angular momentum equation since it is no longer associated with the rotating parts of the axle...

[Harley]

Originally Posted by JeremyH

Changes in angular momentum (or moment of inertia) is what will break parts. If you increase that momentum (by increasing either the velocity or mass), then you increase your chances of breaking parts. By moving the weight to the knuckles, he takes it out of the angular momentum equation...

Yes, but the flywheel effect of a slightly heavier wheel will help keep a more steady moment of inertia. When you loose that effect is when you can see bigger changes and break more parts. Like I said, I have experimented with this already. Again, its a balance.

[JeremyH]

Originally Posted by Harley0706

Again, its a balance.

I suppose everyone is entitled to their opinions.

[rob_b]

Originally Posted by Harley0706

Yes, but the flywheel effect of a slightly heavier wheel will help keep a more steady moment of inertia. When you loose that effect is when you can see bigger changes and break more parts. Like I said, I have experimented with this already. Again, its a balance.

So whats the magic weight then?

[Harley]

Originally Posted by rob_b

So whats the magic weight then?

Super 300's and forget about it I love the snap of my light weight setup now. Knuckle weights and SLW's with 300's would be great. I swapped knuckles since then though so my knuckle weights don't work anymore.

[rob_b]

Originally Posted by Harley0706

The weight isn't what breaks parts. Its the sudden stops that usually do.

Originally Posted by Harley0706

The flywheel effect of a slightly heavier wheel will help keep a more steady moment of inertia.

Originally Posted by Harley0706

Knuckle weights and SLW's with 300's would be great.

TURN DOWN THE AWESOMENESS I DON'T THINK YOU HEARD MY QUESTION:-P So I'll reword it. In your testing whats the ideal wheel and knuckle weight to limit the shock loading of the axle components? Your posts seam to contradict themselves concerning wheel weight. 300's are just moving the weak link onto the locker/gears? Aren't they still subjected to these forces?

[Harley]

Originally Posted by rob_b

TURN DOWN THE AWESOMENESS I DON'T THINK YOU HEARD MY QUESTION:-P So I'll reword it. In your testing whats the ideal wheel and knuckle weight to limit the shock loading of the axle components? Your posts seam to contradict themselves concerning wheel weight. 300's are just moving the weak link onto the locker/gears? Aren't they still subjected to these forces?

HAHA, my weak link was always the inner axle shafts. It definitely just shifts the weak point but that point wasn't weak enough for me to expierence the same problems. When I went to SLW's with 4 oz's in the wheels I was snapping dog bones constantly.

I was running Thrashers with 9 oz's in each before, no breakage. Slower throttle response.

Took 4 oz's out per wheel and replaced it with knuckle weights. Snappier throttle but started breaking dog bones.

Went to just SLW's with 4 oz's per wheel and couldn't keep shafts in it at all. So that is when I just put 300's in it.

[rob_b]

So now that you have 300's and if your your knuckles allowed, would you take the weight out of the wheels and put it on the knuckles? Sounds like its a no compromise modification if you have snappier throttle, unchanged weight bias and no breakage. Although I still wonder if it would noticeably change the way the truck reacts during ledge jumps and steep downhills.