Hancha Rear Lower Control Arm

[7thgear]

people can do 1.5G sustainable on A6s, spikes can easily get into the 2.0 category

in your picture the bolt bends nearly 45 degrees at 2.0 side load

thats... kind of catostrophic, is it not?

[SubieNate]

Originally Posted by 7thgear

people can do 1.5G sustainable on A6s, spikes can easily get into the 2.0 category

in your picture the bolt bends nearly 45 degrees at 2.0 side load

thats... kind of catostrophic, is it not?

The visual deflections shown in FEA analysis programs are exaggerated to make it easier to visualize what's going on. If you were to adjust the program to show the actual deflection it would be quite a boring image.

What you're looking for in those pics is for peaks in the stress/strain the part is being put under. blue usually represents a very low stress level, yellow is higher, orange higher, and red is usually bad. That is, if the material properties and unit scaling are setup properly. The pics show that according to that analysis, everything is well within acceptable stress/strain levels.

Cheers
Nathan

[7thgear]

excellent, thank you.

[Hancha Group]

Thanks Nathan! Correct, the images are exaggerated, the actual deflection will be fractions of a mm, almost impossible to spot with the naked eye so the program automatically exaggerates it for visualization. We've also increased the adjuster size from 5/8's in the prototype model to 3/4's in the production version. It will add a good amount of stiffness and strength. The final OTS arm will look like this to remove debris build up and allow for bottom mounted adjusters to be reached:

[JackSmiley]

ETA?

[Hancha Group]

There is one prototype version available. The revised version will take roughly four weeks to receive from date of build order

[Tansey86]

How much camber adjustment will this allow for the rear?

[Hancha Group]

Originally Posted by Tansey86

How much camber adjustment will this allow for the rear?

It depends on your ride height and which side it's on. We haven't had a chance to rack it with a car at stock ride height, but you should be able to get over -3 degrees at stock ride height. More when lowered.

[Tansey86]

Originally Posted by Hancha Group

It depends on your ride height and which side it's on. We haven't had a chance to rack it with a car at stock ride height, but you should be able to get over -3 degrees at stock ride height. More when lowered.

What about dialing back in? If you want less camber and you are dropped around 2 inches and have -3*, could you dial it back to around -1.5*?

[Hancha Group]

Originally Posted by Tansey86

What about dialing back in? If you want less camber and you are dropped around 2 inches and have -3*, could you dial it back to around -1.5*?

Yeah, that shouldn't be an issue, the arm shortens about 15mm vs. stock.

[eckoflyte]

Out of curiosity, have you considered lowering the mounting point of the shock to decrease ride height while maintaining bump travel. For e.g., Stance and GTSpec have this sort of design. If not, what were your reasons? Would a lower point have an adverse effect on the geometry?

[DriftEightSix]

has anyone fitted these yet?

[ft_sjo]

The thing that worries me about these (and no doubt similar design items) is as is shown on the first page, with just 2G force (on multiple planes), the arm fails. what about when you lose the rear end a bit and tap the rear wheel against a curb? That's a LOT more than 2G!

[DriftEightSix]

Even a stock arm wouldn't survive that kind of impact.