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Author Topic: Front suspension  (Read 190 times)

TheGiantTribble

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Front suspension
« on: 09 September 2022, 09:31:44 am »
Good morning all.

Looking at the inspiration car, it has twin trailing arms as it's front suspension, now how in the heck do I do that easily???
Let me emphasis the easily bit!!!
Any one know of an old light weight car I could rob, or can think of an simples way of achieving this?
Preferably using no more than scraps of plywood, empty sweet wrappers, and the change found down the back of the sofa!!!

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Jimr1999

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Re: Front suspension
« Reply #1 on: 09 September 2022, 11:05:01 am »
Are they not twin a frame torsion bars in the front end? https://www.motorsportmagazine.com/archive/article/march-1990/37/maserati-v8-ri-part-three

... ALfa Cyclekart vid... https://www.youtube.com/watch?v=lC-8ewUnhg8

... Torsion bar out of 3/8" socket extension ... https://www.youtube.com/watch?v=hAMQDjyAJCg&t=2s
« Last Edit: 09 September 2022, 11:23:33 am by Jimr1999 »
... You can lead a horse to water, but a pencil must be lead.

TheGiantTribble

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Re: Front suspension
« Reply #2 on: 10 September 2022, 10:06:21 am »
Interesting, very interesting...a socket extension!

Thanks for those ideas.

synthpunk

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Re: Front suspension
« Reply #3 on: 12 September 2022, 05:07:42 pm »
Whilst messing about designing my rubber rear suspension for my kart,I came across the Tucker 48/ Tucker Torpedo, which used rubber in torsion and rubber in shear for its rear and front suspension respectively. Once I’ve got my kart all squared away for this year and back on its wheels (it’s currently being painted) I’m thinking of having a play with making a modular, bolt on front independent suspension system based on the Tuckers front suspension, using Volvo transmission mounts as the shear rubber. Basically it’s a big rubber block sandwiched between the upper and lower control arms.

TheGiantTribble

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Re: Front suspension
« Reply #4 on: 15 September 2022, 08:53:36 am »
Tuckers front suspension...never come across that before, thanks for the info.

StefanN

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Re: Front suspension
« Reply #5 on: 16 September 2022, 03:22:46 pm »
Intriguing Bill, what inspiration car are you thinking of building?

Chris L

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Re: Front suspension
« Reply #6 on: 17 September 2022, 10:55:45 am »
Are they not twin a frame torsion bars in the front end? https://www.motorsportmagazine.com/archive/article/march-1990/37/maserati-v8-ri-part-three

... ALfa Cyclekart vid... https://www.youtube.com/watch?v=lC-8ewUnhg8

... Torsion bar out of 3/8" socket extension ... https://www.youtube.com/watch?v=hAMQDjyAJCg&t=2s
Note to Builders; This type of Double wishbone / "A" Arm Independent suspension set up is not within CKGB  Rules and Guidelines, more suited to Post War Race cars of the Colin Chapman era.   Please see section 3 and read the Rationale 3.5.  Builders are asked to follow the Pre war inspiration car for type of suspension.

Jimr1999

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Re: Front suspension
« Reply #7 on: 17 September 2022, 01:00:34 pm »
Sorry Chris, my bad I should have payed more attention to the rules. I was just looking at Bills profile and it had a Maserati V8R1 as inspiration car, which I believe had torsion bar suspension not dissimilar to the old 1930's Citroen traction avant hence the torsion bar links. I think the set up in the second video actually has a solid front axle mounted to the torsion bars via drop links in his future videos.
If you need the post removing I will gladly.
Jim
... You can lead a horse to water, but a pencil must be lead.

TheGiantTribble

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Re: Front suspension
« Reply #8 on: 19 September 2022, 10:18:47 am »
Ok, Ok, lets try and answer some questions

Stef...the inspiration car is a 1938 ERA 'E' type GP1.
Sorry to Jim for any confusion, the Maserati is as finished as it's ever going to be, admittedly in a few pieces at the moment.
The reason for the original enquiry is, as anyone who has had a go in my Masser knows, the pedals are in a shall we say 'unique' position, however they make Xan sit too low, if I change them to suit him, I can't get in it let alone drive it. Can't make the pedal position adjustable because of a reinforcing bar in what is now the wrong place...it seemed like a good idea at the time...DOH!
So Xan and I have decided to build a new CK, one to suit both of us, with pedals that are adjustable, thanks to a  car seat adjusting mechanism I have going spare. My first attempt at building a CK was GP1 so seems a good time to go back and give her another go.

The GP1 has twin trailing arms front suspension, a unusual arraignment worthy of copying if easy to achieve with my meager/none existent skills.






Jimr1999

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Re: Front suspension
« Reply #9 on: 19 September 2022, 10:41:59 am »
That would make it torsion bars in the transverse position from a quick google
 "Front suspension was by trailing links and transverse torsion bars."
The trick would be a solid mounting in the front middle of the chassis to take 4 matched socket extensions to the trailing arms, A bushed mount to the outside of the chassis on each side, adjusters in between the middle mount, a king pin through an upright connecting each pair of trailing arms and a set of Gemini spindle carriers?

Way from orthodox, but in keeping with the original. Also a lot of head scratching to make sure it can't come to bits under load or flex too much with side load.
Probably best to simplify this  ;D
... You can lead a horse to water, but a pencil must be lead.

TheGiantTribble

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Re: Front suspension
« Reply #10 on: 19 September 2022, 10:59:27 am »
Probably best to simplify this  ;D

Hang on a second, you'll be suggesting I go all sensible next...Bahhhhh humbug, never going to happen, not on my watch, I mean where's the fun in that!!!  ;D ;D ;D

Jimr1999

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Re: Front suspension
« Reply #11 on: 19 September 2022, 11:38:12 am »
Essentially one side would look a bit like this...
... You can lead a horse to water, but a pencil must be lead.