Steve Hnz
|
 posted on 17/8/04 at 05:42 AM |
|
|
Satchell links
Having just finished reading Cymtriks latest treatise, I`ve begun to think about satchell links again. What orientation should the bushes have, right
angles to the link & angled to the axle or parallel to the axle & angled to the link( or anything else)? From memory, cars such as the 3,4 5
Cortinas had their diagonal link bushes at right angles to the link, & this would seem appropriate in this case too. I`m hoping to use modified
Nissan track arms for my trailing arms & maybe satchell links. Thanks, Steve.
|
|
|
|
|
pbura
|
| posted on 17/8/04 at 01:04 PM |
|
|
I think parallel to the axis of rotation (the axle), because otherwise they will bind. Consider A-arms, much the same principle.
Pete
Pete
|
|
|
locost_bryan
|
| posted on 18/8/04 at 04:02 AM |
|
|
Are you referring to a 2-trailing link and central wishbone like Lotus used, or a 2-trailing link and 2-semi-trailing link like Cortina3/4/5 and
Viva/Magnum.
The first would need pivots parallel to axle, same way as front wishbones have mounts parallel to wheels.
The second would require pivots at the angle of the respective link, ie parallel to the axle for the trailing links and 45 degrees for the
semi-trailing links (or whatever the "semi" angle is ;-)
Bryan Miller
Auckland NZ
Bruce McLaren - "Where's my F1 car?"
John Cooper - "In that rack of tubes, son"
|
|
|
Steve Hnz
|
| posted on 18/8/04 at 05:04 AM |
|
|
Bryan, I`m thinking along the lines of 2 trailing & 2 semi trailing, the top ones being as per book & the bottom going from the tunnel ends
out to de dion tube ends as Cymtriks has mentioned in his chassis strength document. There`ve been earlier posts that mentioned this in principle but
nothing in detail. The only thing that google showed up was a Cobra replica site using satchell links. They did theirs the same as I`m thinking of
& their arms had the joints at right angles to the arm, ie angled to the axle. They were using Heim/Rose type joints. I tend to think that in view
of the limited suspension travel of a locost that decent bushes should allow enough movement, it wouldn`t be more than the twisting on the current
trailing arm set up & I think that the joints/ bushes on the end of semi traliing arms being at an angle to the axle would make them better able
to resist side loadings. I take the point re an A frame such as Caterham & Fraser use needing to have joints that are parallel to the axle though.
Interested in others points of view. Cheers, Steve.
|
|
|
locost_bryan
|
| posted on 19/8/04 at 03:50 AM |
|
|
Is this what you had in mind?
Bryan Miller
Auckland NZ
Bruce McLaren - "Where's my F1 car?"
John Cooper - "In that rack of tubes, son"
|
|
|
Steve Hnz
|
| posted on 19/8/04 at 04:41 AM |
|
|
Pretty much, without having worked it out I think the diagnal link angle would be a wider one than either of those, possibly nearer to 30` from the
axle, but in essence much like the pic you`ve posted. Thanks, Steve.
|
|
|
