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My 4 Link buildup

muleskinner

muleskinner

Well-Known Member
Location
Enoch, UT
Greg said:
Here's what I'm thinking about...

RearAxle2-Drawing.JPG


Probably out of 1/4" plate, 2.5" wide. I'm not exactally if it would be that tall, just need to take in to account 10" of verticle seperation. Plus, my Fuel Cell sits somewhat above this area.
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Looks good, but I'd move your brackets as close together as possible for more angle.
 
Greg

Greg

I run a tight ship... wreck
Admin
Location
Grand Junction, CO
mbryson said:
Is there a reason you've got the bracket that high off the housing? Just seems like it could be a little more compact?
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It's just a drawing, man. :p

I haven't based that drawing off any measurements, but I am looking for 10" of Verticle Sep. That's the biggest concern as of now and that measurement will play a huge part in what the axle bridge looks like.

Plus, Toy diffs are pretty small, the pic may be decieving?!
 
mbryson

mbryson

.......a few dollars more
Supporting Member
Location
Bountiful, land of rocks
Greg said:
It's just a drawing, man. :p

I haven't based that drawing off any measurements, but I am looking for 10" of Verticle Sep. That's the biggest concern as of now and that measurement will play a huge part in what the axle bridge looks like.

Plus, Toy diffs are pretty small, the pic may be decieving?!
Click to expand...



Hey, I'm new at this .........just trying to learn...........:D
 
Maverick

Maverick

old-school
Location
Anywhere, thanks to my geeky droid
Greg said:
Just for refrence, I'm going to be building the 4 Link for 40" tires.... ;) 10" of verticle seperation at the axle end.
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Why 10"? (meaning, how did you arrive at 10", vs 8" or 12"?)

RockMonkey said:
I have a prediction of my own about which set of holes he's gonna end up using, but I'll just keep it to myself.
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Would your prediction be what I think it is? Or have you changed your opinion? I know I changed my opinion about that after seeing how yours worked.

I Lean said:
...the amount of horizontal convergence of the links.
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wow: Verbal Advantage!
 
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Maverick

Maverick

old-school
Location
Anywhere, thanks to my geeky droid
Greg said:
So the pinion will drop... it ain't a Baja truck that will be getting aired out, it's a rockcrawler. The diff is going to stay mainly centered while the axle is twisting up. If I were jumping it, than it might be best to go with a diffrent design.

Does that make sense or am I up in the night?
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yes and no...see below


I Lean said:
Keep in mind that there is another thing that affects whether the pinion will drop when the suspension does, or not....the amount of horizontal convergence of the links. Even if the uppers are shorter than the lowers, if they converge toward the front they'll tend to keep the pinion pointed toward the Tcase. Just like everything else, it's a balance/trade-off kinda deal.

That said, you're right in putting the other considerations first--but when you say it won't be getting aired out....I'm guessing you're wrong. :)
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Greg, you are right about the fact that the diff will be mainly centered while the axle is twisting up. Carl is right about the horizontal convergence (ohh, now I'm saying it).

One thing to remember is that whatever the geometry tells the diff to do, that is what the diff will want to do under a torque load. So even though you may not think you care what it does...I'm guessing you still care what it wants to do under a torque load (wants to lift the axle, wants to push down the axle, neutral, etc)

Brett (looking forward to the day when I drive differently because I have a 4-link)
 
Maverick

Maverick

old-school
Location
Anywhere, thanks to my geeky droid
Hickey said:
Of course, all of this is just guesswork for now, we haven't taken any measurements, in fact, we haven't even consulted with an engineer. Is someone on RME an engineer that could help us out? :rofl:
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Nice one. Is anyone an engineer? You tell me.

You all are, actually, to some degree. Pretty impressive ones too. :)

rant mode on:

:rofl: Ouch. WTF. Not really sure why some of you are mocking me or anyone else that has studied and passed the science behind this stuff, especially when this is the stuff that got us through all the hell. :confused:

I'm guessing that in 3 years when Kurt gets done with his hell that he'll no longer be allowed an opinion. Then, after 4 years of proving his poop to senior engineers to get licensed, he really won't know anything. I suppose that I should throw away the chassis engineering book that he gave me, also written by an engineer, cuz the guy in there must not have a clue. :rolleyes:

The stuff you guys build is pretty impressive, and I learn a lot, even though I know it is unlikely that you are using Euler bending equations for the UCA's and LCA's, stress/bending calcs of any kind for the structural members, etc. Do I ram that down your throat? Nope. Do you need them? Maybe, maybe not. How would you know? :eek:

Sorry I ever offered my services, and that it frightened or offended any of you, especially when I considered you friends. Folks like Carl and Braden have known me for a while and know that I don't throw it out there as an ego trip, sorry if it was seen that way. I'm not here to be a know-it-all god, cuz I'm not. I don't pretend to be anything I'm not, but I am what I am, just like you all are whatever you are...and I don't recall mocking any of you because of it. :rolleyes:

Brett (talk about moving on...)

rant mode off

PS: Greg's 4 link - you're doing pretty good so far.
 
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Caleb

Caleb

Well-Known Member
Location
Riverton
Maverick said:
Nice one. Is anyone an engineer? You tell me.

You all are, actually, to some degree. Pretty impressive ones too.

rant mode on:

Ouch. WTF. Not really sure why some of you are mocking me or anyone else that has studied and passed the science behind this stuff, especially when this is the stuff that got us through all the hell.

I'm guessing that in 3 years when Kurt gets done with his hell that he'll no longer be allowed an opinion. Then, after 4 years of proving his poop to senior engineers to get licensed, he really won't know anything. I suppose that I should throw away the chassis engineering book that he gave me, also written by an engineer, cuz the guy in there must not have a clue.

The stuff you guys build is pretty impressive, and I learn a lot, even though I know it is unlikely that you are using Euler bending equations for the UCA's and LCA's, stress/bending calcs of any kind for the structural members, etc. Do I ram that down your throat? Nope. Do you need them? Maybe, maybe not. How would you know?

Sorry I ever offered my services, and that it frightened or offended any of you, especially when I considered you friends. Folks like Carl and Braden have known me for a while and know that I don't throw it out there as an ego trip, sorry if it was seen that way. I'm not here to be a know-it-all god, cuz I'm not. I don't pretend to be anything I'm not, but I am what I am, just like you all are whatever you are...and I don't recall mocking any of you because of it.

Brett (talk about moving on...)

rant mode off

PS: Greg's 4 link - you're doing pretty good so far.
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OK Brent (yes, I said Brent not Brett:D)...now take a deep breath and breath through your nose. I think you are reading into that WAY too far;)

I dont think there is aperson on here that does not respect what you do or you as a person. I am also willing to bet that just about every person on here at some point in their life has wanted to be an engineer...I know I have, but damn thats a lot of schooling:p

:D
 
Maverick

Maverick

old-school
Location
Anywhere, thanks to my geeky droid
Supergper said:
OK Brent (yes, I said Brent not Brett:D)...now take a deep breath and breath through your nose. I think you are reading into that WAY too far;)

I dont think there is aperson on here that does not respect what you do or you as a person. I am also willing to bet that just about every person on here at some point in their life has wanted to be an engineer...I know I have, but damn thats a lot of schooling:p

:D
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:D :rofl: :D Ya, maybe so. Goes a little deeper, and Shawn & his approved Hickey touched a nerve, maybe on purpose, maybe not. Don't like being mocked, especially where I go to escape. (I can get that at home) (after putting up with Civ's all day) (& clients that want free engineering via proposals)

4-links and suspensions are cool stuff, let's get back to it.

Thanks,
Brett
 
Caleb

Caleb

Well-Known Member
Location
Riverton
Maverick said:
:D :rofl: :D Ya, maybe so. Goes a little deeper, and Shawn & his approved Hickey touched a nerve, maybe on purpose, maybe not. Don't like being mocked, especially where I go to escape. (I can get that at home) (after putting up with Civ's all day) (& clients that want free engineering via proposals)

4-links and suspensions are cool stuff, let's get back to it.

Thanks,
Brett
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:cool:
 
onetuff76

onetuff76

Guard Rail Tester
Location
Lehi
Hickey said:
Is someone on RME an engineer that could help us out? :rofl:
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Studying to be an engineer... although aeronautical. All I can tell you is that thing isn't going to generate lift, and will produce more drag than Shawn. :D:D

As for the Toy rear axles I read a stress test and they were running up with D44's
 
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