New Swingarm Design

[Blaner]

Hi guys, well as some of you know I had an incident with snapping my swingarm, I have since done a repair job, which worked quite well, but then proceeded to snap the back shock, I think it took some damage when the swinger broke. Pics of that later,


Anyway, I have been busy doing some designs on a new swingarm, its not yet complete but thought id drop it here for some criticism and input!



















Havent got time for a long post right now, but here goes, will keep ya posted asap...

 

[nick20555]

Nice work. I bet that took some time to make. I don't have the patience when making 3D models to go into that much detail. And I'm sure a swingarm has a lot of angles and measurements you have to match. Makes me wanna brush up on my 3D modeling skills. I kinda wish I could take that to our rapid prototype here at school and display it lol

 

[Blaner]

my idea with the "wings" at the back are that they will be a solid plate that fits down a slot in the rectangular tubings, I will let this run passed the shock mount position as last time I stopped before and it broke there. I then will run the wings along the outside like a spine ontop of the rectangular tubing and around the front of the bearing tubes up front, this will resist any torsion.

You may notice the hole in the spine in line with the shock mount, this is simply to allow fitment of the bottom bolt.

 

[C-H55Blasty]

I really like that design! Do you plan on using aluminum to build this one too? Its easy to see how the faults of your first swing arm influenced this design.

 

[Bluesman]

Wow! All that effort and you're using the stock carrier? It makes much more sense to build it for a roundhouse carrier.

 

[Blaner]

ive considered it, but for me to get a roundhouse carrier is a mission, its just too expensive at the moment with the Rand Dollar exchange. Im doing this as a trial run, I have a plan to do another arm in years to come, hopefully ironing out a few more kinks and doing a linkage setup off a YFZ. When I get to that, I may do a roundhouse.

Ive considered my metal options, Aluminium wont be strong enough. Stainless has a higher tensile strength but a lower resistance to torsion, which is what I need, Chromoly is not available to me, unless imported at ridiculous prices. Im going to go with mild steel. 3mm tubing with 6mm laser cut parts, then weld it all up, im eliminating weld sites by having the pieces cut. Ive also gone for radius' instead of angles which concentrate force.

 

[79 bronco]

Wow that 3D stuff is cool!

 

[Herpderplol]

My question is how much will that weigh?? there should be an option to change material and then you can actually get a good estimate for weight

indestructible, yes

why did you not decide to do the round piping in the middle for cross braces? vs. the I "beam" you have in the design

I like the idea of having the wings go all the way up

 

[Blasturd]

What do you estimate that things gonna weigh?

 

[Blaner]

I have not yet done any weight calculations, I will get to that once im done with all the extras. I do anticipate it to be fairly heavy. Bottom line is I need strength and weight is a secondary factor for me...

Round tubing is still on the cards, the idea for scrapping it is simply welding logistics. Its easier to work with square faces than a round tube. Also, my radiused braces will have more contact with a square tube than a round tube, Im still considering it however. Another reason is that my failure had nothing to do with the rectangular cross members, but rather with a lack of reinforcing along the legs and sharp angles.

I will look into round tubing further.

 

[tfaith08]

I know I'm late, but... Switch it over to a roundhouse carrier. That's my only concern unless you want to get deep into some math and run a mega travel rear.

 

[HillBillyES]

^^ agree if you're gonna go through all the trouble might as well make it a round house... The stock carriers are a pain

 

[79 bronco]

I dont think people want to spend the extra $$$ for the round house carrier!
I dont get it, if they are spending all that $$ on the swingarm why not spend a little more and go for the better roundhouse?

 

[HillBillyES]

Sure the stock carrier works but not well the round house is bullet proof and fast and easy to adjust

 

[Larry's Shee]

Keep in mind that Blaner is in South Africa. What you can get in a day for a buck, may take months and cost 50X more.

If the US had a little tougher import laws and tarriffs, duties, taxes we wouldn't be flooded with Chiwanese junk.

 

[79 bronco]

Keep in mind that Blaner is in South Africa. What you can get in a day for a buck, may take months and cost 50X more.

If the US had a little tougher import laws and tarriffs, duties, taxes we wouldn't be flooded with Chiwanese junk.

Thats right!!

 

[tfaith08]

I'd almost feel comfortable stating that it would be about as difficult to design and create a carrier as it would a swinger.