Alan B
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| posted on 25/1/07 at 11:48 PM |
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Some work on my rear suspension
One corner under way...trying to make a lot of use of the plasma.
 
Rear corner 01
 
Rear corner 02
[img][/img]
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DIY Si
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| posted on 25/1/07 at 11:51 PM |
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Looks good that. One thing, are you happy with the bottom two bolts in single shear? Would they not be "better" inside the hub carrier?
PS, you may have already thought of this and considered it ok, in which I'll just shut up! 
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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Alan B
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| posted on 26/1/07 at 12:28 AM |
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Yep, I'm happy....I used to despise single shear arrangements, but they are commonly used to good effect. The shaft that the rod ends are
mounted on will be high tensile steel with just enough threads for a nut at end..i.e full shaft diameter in shear....for example a shaft of grade 8 or
equivalent material would require over 8,000 kg to shear it.
Good question though, and I appreciate the input.
Cheers, Alan
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DIY Si
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| posted on 26/1/07 at 12:33 AM |
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That's quite ok, just curious really. The rest of it looks quite tasty too, I quite like the design of the bottom bone. I may have to pinch it
when I need to make some! 
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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James
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| posted on 26/1/07 at 12:57 AM |
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Looks great!
I don't know the correct metal work terms for this...
But would it not be advantagous to have the large arcing tube merge into the main longitudinal tube. Rather than sealing the end and welding it to the
tube?
Would give a larger area to weld, and would save sealing the tube up!
Just an idea not properly thought through!
Cheers,
James
------------------------------------------------------------------------------------------------------------
"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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locost_bryan
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| posted on 26/1/07 at 01:30 AM |
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I'm an engineering novice - what is the difference between single and double shear? A bolt supported at one end versus a bolt supported at both
ends?
Bryan Miller
Auckland NZ
Bruce McLaren - "Where's my F1 car?"
John Cooper - "In that rack of tubes, son"
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Alan B
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| posted on 26/1/07 at 01:54 AM |
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James, you are absolutely right, however it would make for a horrendously difficult joint to make. Good idea, just not easy to do
Bryan, yes that's pretty much it....in single shear the the shear load is in one place rather than being shared in two places.
Again thanks for the feedback.
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kb58
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| posted on 26/1/07 at 02:20 AM |
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What is that bolt-on spindle off of?
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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Alan B
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| posted on 26/1/07 at 02:24 AM |
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Spindle/hub unit is Chevy Cavalier. I'm planning to use them all round.
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Sven
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| posted on 26/1/07 at 08:20 AM |
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quote:
Originally posted by Alan B
Spindle/hub unit is Chevy Cavalier. I'm planning to use them all round.
Will you have to have custom axles made?
-Steve
"Lightheadedness through quickness"
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ecosse
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| posted on 26/1/07 at 09:21 AM |
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Theat bottom bone looks terrific, not seen one like that b4 
Will the shock mount roughly where the string is tied, or on the further out of the tubes? If so will it require additonal bracing at this point?
Looking good though
Cheers
Alex
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bodger
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| posted on 26/1/07 at 01:10 PM |
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How come your garage/wokshop is so bloody clean?
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Alan B
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| posted on 26/1/07 at 01:13 PM |
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quote:
Originally posted by ecosse
Theat bottom bone looks terrific, not seen one like that b4
Will the shock mount roughly where the string is tied, or on the further out of the tubes? If so will it require additonal bracing at this point?
Looking good though
Cheers
Alex
Thanks for the kind words.
It may end up being a pushrod and rocker arrangement, but either way the string is roughly at the mounting point, and yes it will braced diagonally.
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Alan B
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| posted on 26/1/07 at 01:14 PM |
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quote:
Originally posted by bodger
How come your garage/wokshop is so bloody clean?
Do you really think so?.....if you do then it's down to my Dad sweeping up after me...
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Alan B
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| posted on 26/1/07 at 01:23 PM |
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quote:
Originally posted by Sven
quote:
Originally posted by Alan B
Spindle/hub unit is Chevy Cavalier. I'm planning to use them all round.
Will you have to have custom axles made?
-Steve
Yep, it was the plan from the start...gives me a lot of freedom to mix and match transmissions and change track width.
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kb58
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| posted on 26/1/07 at 02:11 PM |
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I learned the hard way to be very careful measuring how long the axles need to be. Be sure to anticipate all suspension and engine motion,
otherwise the combination of the two can bottom out the CVs.
That said, having custom axles made is a great way to "bridge" between different makes of parts. For example, it's then easy to use
a Miata diff with Nissan 240SX rear uprights.
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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Alan B
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| posted on 26/1/07 at 03:20 PM |
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quote:
Originally posted by kb58
I learned the hard way to be very careful measuring how long the axles need to be. Be sure to anticipate all suspension and engine motion,
otherwise the combination of the two can bottom out the CVs............
Good point kb.
It is something I'd considered but still well worth mentioning. I will mock up a set of axles and test them before committing to the finished
length.
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sgraber
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| posted on 29/1/07 at 05:54 PM |
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Holy crap Alan! This is neater than the original Meerkat design in leaps and bounds. I approve, not that you need my approval... but I give and give.
LOL.
Interesting that you should be using the Cavalier hubs, as those are the same units that come with the 2.2L Ecotec I am using on my next car. I am
continuing the use of the deDion at this point and bolting those GM hubs to a carrier tab. Front uprights using the same GM hubs to maintain the bolt
pattern which is a not too common 5x100 btw.
Rorty's website has a nice pictoral on determining the length for custom half-shafts. Not that you need any help, but there it is.
Graber
Steve Graber
http://www.grabercars.com/
"Quickness through lightness"
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