The CAD model is done for the 1st prototype. Not sure when they'll be done (hopefully a week) but i'm making them with an SLS machine to test for fitment.

I need to resolve the upper ball joint issue (or lack there of) as well, since they are not available from honda by themselves.

The arm is paired with the links on either side with a threaded rod and secured by nylock nuts. The holes in the model are small, they will be enlarged and tapped for the threaded rods for fitment. The links then mount to the stock bushing and chassis mount. Once fitment is confirmed the model will be "cleaned up".

 

That rock nadzzz. I may have to lower my car and leave stock class just so I can justify buying some.

 

what metal will you be making them out of? Cool that you designed them yourself, but I would beef them up as much as possible, with no load anylsis it will be tough to find problem area with out it failing while on the car. nice looking piece!

-nate (being a picky engineer)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nate &raquo;</TD></TR><TR><TD CLASS="quote">with no load anylsis</TD></TR></TABLE>

Who says there isnt?

I'm currently looking at a 30mm range of adjustment of the length of the arms. Loading should be able to withstand 2g.

 

solidworks ownzzz i have FEA built right in

what is that software you are uising ProE?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RJ &raquo;</TD></TR><TR><TD CLASS="quote">

Who says there isnt?

I'm currently looking at a 30mm range of adjustment of the length of the arms. Loading should be able to withstand 2g.</TD></TR></TABLE>

Good stuff! I just assumed, and I assumed wrong!

-nate

 

I have not selected a material yet - but the part will be able to withstand 2g (one of my design parameters).

 

see, RJ may be worth a damn after all!

 

Guys like you freak me out. A guy I know here in town designed his own Blower manifold and had it custom made out of billet somewhere in California for his 455 Olds motor used in his speed boat.

Its great to learn from him even though he goes into a Mr. Rodgers way of explaining things sometimes.

 

very nice. makes my 2g crx/4g civic desings on paper for ucas look like...there on paper

 

If anyone is pulling 2g's in a Honda on a turn please let me know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wspr22 &raquo;</TD></TR><TR><TD CLASS="quote">If anyone is pulling 2g's in a Honda on a turn please let me know.</TD></TR></TABLE>

I'd like to know too. But you need to build in a certain saftey margin (usually 200% of the expected load).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wspr22 &raquo;</TD></TR><TR><TD CLASS="quote">If anyone is pulling 2g's in a Honda on a turn please let me know.</TD></TR></TABLE>

It's not just the cornering loads you have to think about. There are momentary forces from hitting large potholes and other similar things (but I'm no engineer so I have no idea what effect they have on stuff like UCAs).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wspr22 &raquo;</TD></TR><TR><TD CLASS="quote">If anyone is pulling 2g's in a Honda on a turn please let me know.</TD></TR></TABLE>
Im sure RJ knows this already, but due to mechanical advantage, levers, and all that other fancy Physics stuff, the actual part could be subject to much higher than 2g forces as well as stress points in the part being subject to higher forces, and also striking forces, not just cornering forces.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elgorey &raquo;</TD></TR><TR><TD CLASS="quote">
Im sure RJ knows this already, but due to mechanical advantage, levers, and all that other fancy Physics stuff, the actual part could be subject to much higher than 2g forces as well as stress points in the part being subject to higher forces, and also striking forces, not just cornering forces.</TD></TR></TABLE>

You could probably see instantaneous load well over 1g. Probably 2g or even higher. 2g is what i'm shooting for with an *actual* failure point of somewhere north of 3g. If you hit something that hard and bend it then, well, i dont know.

Car weight*weight distribution = weight per corner*cornering load*motion ratio = intended part strength. Think free body diagram.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Audipwr1 &raquo;</TD></TR><TR><TD CLASS="quote">solidworks ownzzz </TD></TR></TABLE>

you got that right....and i have the same copy here at work

btw, i believe that is in fact a version of pro-e

for the love of god, please suppress your planar views also...your killing me. Id also love for you to send me a copy of your design, I would run a stress analysis on it and show you where the potential problem areas are...I see at least two stress fractures just waiting to happen by just observation.

nick, who might have done this once or twice at work


Modified by Johnny Tran at 9:55 AM 4/23/2003

 

my humble guess would be the two 90 degree angles where the two arms join

Johnny throw it in solidworks FEA it with the 3 holes as the anchor points and post her up!!!
I wanna see those stress concentrations!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Audipwr1 &raquo;</TD></TR><TR><TD CLASS="quote">my humble guess would be the two 90 degree angles where the two arms join

Johnny throw it in solidworks FEA it with the 3 holes as the anchor points and post her up!!!
I wanna see those stress concentrations!</TD></TR></TABLE>


your humbleness is probably a decent assumption...along with a few other "joints"

I can't post anything, I would however if i was sent the drawings...of course I would need to have a hand in production . Shop standard for prototyping fee only is 40k...and no RJ, we don't accept personal checks from MM boyz

 

Unfortunately the drawings are done in solid edge, solid works' useless little brother.

For now the calculations are done by hand, with tables......

Who's got a copy of solid works they wanna send me? Oh yeah, and checks from team MM are probably not worth the paper they're printed on If this project gets off the ground we wont be fronting a $40,000 molding fee.... i hope.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RJ &raquo;</TD></TR><TR><TD CLASS="quote">MOLDING fee...</TD></TR></TABLE>

i wouldn't take your money to make them. I wouldn't want my name on any plastic upper A-frames anyway

 

erp..... brain fart.

I meant casting. Gotta pay for the mold though ($2000-$3000 on a part like this). Then add the machining process to finish it. Then powdercoating. And assembly, packaging, etc.... Even if i test the prototypes successfully this summer it will be 6 months before the first part is delivered - but im ok with that.

Add more time and more molds to expand the product for more car models (civic, 3g integra, etc)

I have a big *** spreadsheet for the costs with the help of one of my professors. But none of it is actual price quotes since the damn model isnt finished yet.

RJ - who appreciates product development more these days

 

suggestions
1. get solidworks- search kazaa for it etc, if not when i got home this summer ill burn you a copy.

2. How are you planning on manufacturing this? (individual casts for each one?)

3. Johhny who do you work for? I want details!

 

I'd have to contract someone to make a mold and then do the casting for me. I'd then do the finishing, machining and powdercoating....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Audipwr1 &raquo;</TD></TR><TR><TD CLASS="quote">suggestions
1. get solidworks- search kazaa for it etc, if not when i got home this summer ill burn you a copy.

2. How are you planning on manufacturing this? (individual casts for each one?)

3. Johhny who do you work for? I want details!</TD></TR></TABLE>

Suggestions, don't do number 1. Designing a product for public sale on "ripped" software is one of the best ways by far to hand royalties over to someone else at best and alot of bad stuff on the "at worst" end of the spectrum. Always read the EULA's with software that you do not own outright (educational copies, freeware, shareware, etc ...) especially if you intend to market/sell a by-product of it.

 

yeah you are right on that matter
also educational versions cannot be used for real design either

so if you want to do it right spend the 5k on the solidworks package...