4 link crawler with torsion bar. Exists ?

[setecastronomy]

There are the 'torsions' and there are 4 link crawlers with shocks. I wonder if somebody has ever realized a 4 link crawler replacing the shocks with torsion bars.

Thanks
Filippo

[Kamikaze]

Yeah buddy......... Kamikaze's '09 Komp Rig Build Thread

http://www.youtube.com/watch?v=HD1Aq7xcKYs

[wojin]

i posted that up last night, but since RCC got rebooted, it got deleted

[inline6power]

Originally Posted by Kamikaze

Yeah buddy......... Kamikaze's '09 Komp Rig Build Thread

http://www.youtube.com/watch?v=HD1Aq7xcKYs

WOW. i am super super interested in this kami. only question i have is it looks to work great with zero torque twist from the berg setup but how will this setup work with a shafted setup? looks amazing. please keep me informed.

[Kamikaze]

Originally Posted by inline6power

WOW. i am super super interested in this kami. only question i have is it looks to work great with zero torque twist from the berg setup but how will this setup work with a shafted setup? looks amazing. please keep me informed.

I'll know about the shafty in a day or so.............

[inline6power]

Originally Posted by Kamikaze

I'll know about the shafty in a day or so.............

please pm me when you find out, i am super super interested in this. thanks.

[Duuuuuuuude]

Very cool chassis Kami, I too am looking foreward to the shafty results...


However, I think the OP was refering not to a torsion chassis but to torsion springs as opposed to regular coils.

I haven't seen any around here, though that doesn't mean that they don't exist. I've thought about trying that myself. I've got some thin music wire that might work. I just haven't decided whether to run two torsions per axle or one. Either way, I don't think it'd be very hard to do.

[Kamikaze]

hmmmm.........

[Harley]

Originally Posted by Kamikaze

hmmmm.........

So how did it drive?

[setecastronomy]

Originally Posted by Duuuuuuuude

However, I think the OP was refering not to a torsion chassis but to torsion springs as opposed to regular coils.

You hit the nail in its head (I suppose you say something like this when somebody is absolutely right). I have a very unusual suspension systems
as described here:
A revolution in suspension ?

Updates on that thread are coming.
After some tests I think that suspension system can be successful only if I can replace the coil shocks with torsion bar but I have no experience with torsion bar at all.
The benefits of not having coil shocks connected to the axle are that the axle twist would be completely decoupled from the vertical movement of axle. Besides I have a lot of problems with tires scrubbing against the coil shocks.

Bye
Filippo

[setecastronomy]

Originally Posted by Kamikaze

Yeah buddy......... Kamikaze's '09 Komp Rig Build Thread

http://www.youtube.com/watch?v=HD1Aq7xcKYs

Thanks, but unfortunately it is not what I'm looking for.
Anyway I really like your extra long links . I too try to make them as long as possible with a very narrow skid plate.

Bye
Filippo

[littleskull99]

Maybe like this from about post 7 down.

http://rccrawler.com/forum/showthrea...t=bull+torsion

Matt

[run2jeepn]

I did this one here..

[Duuuuuuuude]

Originally Posted by run2jeepn

I did this one here...

Still not what he's talking about. Nice though...

Originally Posted by littleskull99

Maybe like this from about post 7 down.

http://rccrawler.com/forum/showthrea...t=bull+torsion

Matt

Much closer, still not quite there though. He's using the rod as a kind of pseudo leaf spring.

In 1:1 a torsion bar twists as the load of the vehicle is applied and released. It doesn't bend, it doesn't flex. You will only find them in IFS setups though, not with a straight axle, as there is one rod per side. You could do it easily enough with one rod here in the RC world if you could get your angles right so that it would twist but also follow the axle movement without binding anything up.

I've got an idea how to do it, but I'm already two projects deep at the moment...lol. I'm definatly giving it some serious thought though...

[littleskull99]

So all of these 'torsion' setups are actually flexing the metal not twisting it.

Could you use a eg. 'c' channel piece of metal running lengthways on top of the chassis same height as where the shock tops would be. Then run an arm/link from the end of the 'c' channel on top down to the axle to provide spring. So you use the twist of the 'c' channel as the springs.

Thats a pretty weird idea, if it makes no sense then take no notice.

Matt

[inline6power]

Originally Posted by littleskull99

So all of these 'torsion' setups are actually flexing the metal not twisting it.

Could you use a eg. 'c' channel piece of metal running lengthways on top of the chassis same height as where the shock tops would be. Then run an arm/link from the end of the 'c' channel on top down to the axle to provide spring. So you use the twist of the 'c' channel as the springs.

Thats a pretty weird idea, if it makes no sense then take no notice.

Matt

isnt that what the pimp cane basically is?

[inline6power]

Originally Posted by Kamikaze

hmmmm.........

any results yet?

[littleskull99]

Originally Posted by inline6power

isnt that what the pimp cane basically is?

Using the 'c' channel as the spring not as the whole chassis. You would have your normal chassis and 4 link setup underneath this. I think he is trying to replace just the shocks with a torsion spring, not the whole chassis.

I see your point though inline6 because with a cane, you dont need the 4 link or chassis.

Matt

[inline6power]

Originally Posted by littleskull99

Using the 'c' channel as the spring not as the whole chassis. You would have your normal chassis and 4 link setup underneath this. I think he is trying to replace just the shocks with a torsion spring, not the whole chassis.

I see your point though inline6 because with a cane, you dont need the 4 link or chassis.

Matt

i got what you are saying now. still using a 4 link setup and a torsion c channel. so basically taking a pimp cane and over laying it onto a chassis setup with a a arm or some sort of link setup that ataches from the cane part to the axle. that way you still get 4 link with the torsion effect. that could work. i am really anxious to hear back from kamikaze. seems like the perfect idea anc chassis in my eyes.

[Kamikaze]

Originally Posted by inline6power

i got what you are saying now. still using a 4 link setup and a torsion c channel. so basically taking a pimp cane and over laying it onto a chassis setup with a a arm or some sort of link setup that ataches from the cane part to the axle. that way you still get 4 link with the torsion effect. that could work. i am really anxious to hear back from kamikaze. seems like the perfect idea anc chassis in my eyes.

There would be problems using a cane type setup with a 4 link, you would have to get the center of the cane to sit right in the center of the 4 links center rotational point or it would bind up.