so thought it had a bearing
lust wondered if any one knows why when using 4 link suspention , the arms are not used in triangular form , pivoting at the normal locost mounts then fixed at a near 45 degree angle to finish on a mount near the diff ........one wouldnt need a panhard rod then , bearing in mind that no more that 100bhp is likely to be available
Early Lotus 7 and Lotus Cortina had an A frame link to the diff and 2 trailing arms.
It does concentrate a lot of force at 1 single point
Many cars have used such diagonal location arms, although usually just the top pair in conjunction with a parallel lower pair.
The TR7 being just one.
The geometry is compromised in ways that I do not begin to understand. It can be OK for a road car with it's usually soft set-up but is seldom
seen on more performance focussed cars. AFAIK.
Now replacing one pair of trailing arms with a triangular frame that mounts directly to the diff centreline, ie. an " A-frame" is a
different matter and can be the heart of a very precise setup as previously posted.
Both of these arrangements would be difficult to incorporate into the Locost I fear. The angled arms would encroach into the cockpit space.
One solution might be to keep the upper pair of arms as per usual then have a rearward A-frame apexing under the diff and pivoting from two mounts on
the rear chassis rail under the fuel tank area.
It would compromise ground clearance but could be OK on a track oriented car.
This arrangement would be essentially the same as featured on our 3 times championship winning TR7V8, albeit turned back to front.
Geoff.
not an A frame just a suitably robust bracket either side of the diff to take upper and lower trailing arms
Where does the 100hp limit come from?
1275 a series engine ....if i get it tuned ya not looking at that much ......
1275 a series engine ....if i get it tuned ya not looking at that much ......
Sorry thought we were discussing design in general.
Cheers
Davie
my only thought was the more bhp going thru the assembly the more chance of trouble
so thought it had a bearing
quote:
Originally posted by mogman1969
1275 a series engine ....if i get it tuned ya not looking at that much ......
cox gtm ....mini based fwd with irs wasnt it ? looking at a solid axle here .....
quote:
Originally posted by mogman1969
lust wondered if any one knows why when using 4 link suspention , the arms are not used in triangular form , pivoting at the normal locost mounts then fixed at a near 45 degree angle to finish on a mount near the diff ........one wouldnt need a panhard rod then , bearing in mind that no more that 100bhp is likely to be available
ahhhhh so it would bind ..... ok ...option two , A frame time now wheres that drawin gone
I looked at the satchel link setup which appears well thought of in America, but since I didn't have a clue what would work, I stuck with a watts
linkage in my case.
The linkage has two diagonals and doesn't seem to bind otherwise it wouldn't work would it?
Cheers
David
Classic range rover, cortina etc, lots of cars out there with linkage like that.
Range rover has ball joint on chassis with A legs on top of axle so opposite to most designs that are wider on the frame, close on the axle.
satchel link ....thats a new one on me ....wiki time .....