Hancha Rear Lower Control Arm

[turbo_jimbo]

What price range are you targeting?

[jamal]

Originally Posted by Hancha Group

Correct. However, 4G is a very extreme load. I don't expect most to do be doing that at a regular basis. I did do a fatigue analysis of the control arm under more realistic loading conditions (1.5G cornering, 1.5G braking, 2G bump) and here is the result:

Do you have an estimate of what a small pothole impact works out to? Or maybe just a big expansion joint at freeway speed?

[u/Josh]

Originally Posted by jamal

Do you have an estimate of what a small pothole impact works out to? Or maybe just a big expansion joint at freeway speed?

Adding to this, how did you calculate the forces encountered in 4G bump? The damper force will be proportional to velocity not acceleration, so did you make some assumption about the wheels upward velocity in this bump?

[Hancha Group]

Originally Posted by Dimman

I only pay attention to Grades 2, 5 and 9 and their 'E' is ~ half of steel give or take.

As for the design, with the FEA that you're doing, the colours represent stress? So the more to red the more stressed? Could you basically just subtract material where it's blue and add it where it starts to become yellow? Same for fatigue? Get it do it stays a universal colour at whatever loading you decide for your safety factor?

The colored bar on the side will tell you how much stress is in the part. For the Fatigue study, it's the number of cycles until failure.

Originally Posted by turbo_jimbo

What price range are you targeting?

I want to make this at the most cost efficient way possible so there may be simple design revisions. It also depends on how many we order at a time due to the scheduling for the machines. I should have pricing early next week.

Originally Posted by jamal

Do you have an estimate of what a small pothole impact works out to? Or maybe just a big expansion joint at freeway speed?

Typically around .3 G's. .5 G's if it's particularly severe.

Originally Posted by u/Josh

Adding to this, how did you calculate the forces encountered in 4G bump? The damper force will be proportional to velocity not acceleration, so did you make some assumption about the wheels upward velocity in this bump?

Based on corner weights, known spring rates, and basic vehicle dynamics. It's not exact, but they're reasonable estimates. I did not reduce force from the damper working on the system, so the loading conditions for the FEA were even more extreme than what they would actually experience in real life. This is just an added factor of safety. If I could model and analyze the part more accurately, I'm sure I could take even more weight out of the part.

[Hancha Group]

I was able to test fit our simplified prototype (this does not reflect the final design) yesterday and spot check everything. While I wasn't able to translate it to degrees (which depends on ride height anyways), you can shorten or elongate the arm about 20mm from stock.





Since we opted to use a linkage adjuster, adjustment was a breeze. With other thin adjustment bolts, you're going to have to get creative to turn it when it's in the subframe.



We are working on final pricing and will put it up shortly.

[GTB/ZR-1]

Nice piece.

[johnb831]

Looks really nice!!

[Hancha Group]

Thank you very much. We are so confident with our product, we are offering a three year warranty for our products to be free from manufacturer's defects. This INCLUDES some forms of motorsport.

There are companies out there that say their product is intended for motorsport use, but will void your warranty if you participate in motorsports. That doesn't sound like much of a warranty to us.

Warranty is also transferable. So, if you buy it second or third-handed, we can still cover you!

For more details, please read our terms of sale on our blog here

[DriftEightSix]

Will you cover people that are from Australia too?

[Hancha Group]

Originally Posted by DriftEightSix

Will you cover people that are from Australia too?

We will cover warranty globally, but please remember shipping is the buyer's responsibility. If you have any specific questions, please PM or email us.

[Hancha Group]

Stopped by the manufacturer's shop. The LCAs are almost complete and they look terrific. Quick video of them milling the pockets.

[ame="http://youtu.be/-D3TWK7I43c"]http://youtu.be/-D3TWK7I43c[/ame]


A few pictures during the build steps. The sides were milled and our logo etched



Then the radii were added



Then the pocket milled



And the hub fork milled



They should be finished tomorrow, then it will be sent off for anodizing.

Our arm does NOT change the damper height. It retains the OEM damper position and adjusts the camber arm length only.

[Dezoris]

Originally Posted by Hancha Group

Stopped by the manufacturer's shop. The LCAs are almost complete and they look terrific. Quick video of them milling the pockets.

A few pictures during the build steps. The sides were milled and our logo etched



Then the radii were added



Then the pocket milled



And the hub fork milled



They should be finished tomorrow, then it will be sent off for anodizing.

Our arm does NOT change the damper height. It retains the OEM damper position and adjusts the camber arm length only.

Finally a designer/vendor close by. Where are you guys at in Chicagoland? Going to likely need some of your stuff for projects.

[kanundrum]

hmmm delicious

[Hancha Group]

Originally Posted by Dezoris

Finally a designer/vendor close by. Where are you guys at in Chicagoland? Going to likely need some of your stuff for projects.

Most of the time I work from Glenview, but I'm mobile so I can always meet you at a convenient time and place. Paul and Zach are based out of Indianapolis and Lawrence is based out of San Francisco. We operate like a 21st century tech company :]