Rear Suspension Link

[masterfabr]

I think you have explained what most of us have been saying.It is not a disagreement about whether or not it works but rather one of terminlogy.

[Pacman]

So....any results from the testing??

[Jet09]

As an Auzzie, and feelow buggy builder.

THIS IS FUCKING REDICULOUS.

how grown adults can, i just cant even think of the correct word.

anyhow, enough from me.

[Pacman]

Originally Posted by Jet09\";p=\&quot

As an Auzzie, and feelow buggy builder.

THIS IS w00tering REDICULOUS.

how grown adults can, i just cant even think of the correct word.

anyhow, enough from me.

I was serious.......I want to know what he found out....I believe like you do that it is a bunch of points in space that work..... not an "Axis" but I base that on the drawing and my knowledge of Geometry....not any real world test.....he's doing a real world test....I want to know if I'm right or wrong!!

[RickS.]

From my very first post I tried to explain that the sweet spot as viewed in a 2D rear view moves in a very tiny arc. It's so tiny that if you place the link midway on it you can treat it as though it is an axis. Hell, it's so tiny that you can place the link anywhwere on on it and it will work. Go all the way back to where this all started (In Doug Heim's build thread) and you will see that this is all I ever tried to point out. My model is done and has been for a few weeks. It does exactly as I said it would and posting it will not prove anything. I can't win this argument even though I have the proof. It's really something you have to see for yourself. *The model is in my shop & I will be happy to show it to anyone that wants to stop over. It does prove the point without a doubt.

Damian, you understand what I've been trying to get across completely.
(With the link at 45 degrees.) If you lock the link at the upright the .001 shows up as linear travel on the axis. If you lock the link on the axis the .001 shows up at the upright. As you move the link out longer (greater than 45 degrees) the linear movement gets even less. Just as trig will tell you.

Damian, I disagree when it comes to unequal length arms though. My new rear end has unequal length arms and my cad findings are the same. A very tiny arc exists and it too can be treated as an axis without creating any deflection of more than a few thou.

Like I said above, If you are close enough to swing by and check it out please do.
If you have something you need done on the lathe or mill bring that along too.
I'll help you out no charge.

Rick S.

[masterfabr]

For my part rick s I see wha t you describe and fully agree with the explanation you just gave.It was just the nitpicking of whether it was a true axis or not.You gave a very good explanation there of what it really is.Please do put up your model for others to see. What this is pointing out in a way is that just because something can't be done with 3D due to it's rigid way of processing things doesn't mean that in the real world with clearances,deflection and such *that it won't work.

[trojan]

Sorry to be late off the mark here.

Can someone give the formula that describes the line of movement of a point on the rear upright,
in terms of arm lengths and upright height and arm spacing height and upright measuring position ratio?
I've tried, but it seems it's just too long since I last did complex geometry *[smilie=banghead.gif]