Post by threelitre on Jul 15, 2013 8:07:27 GMT
Dave,
unless you want a really harsh ride, the shock absorbers will only take a little load from the Hydrolastic units, as you'd want to specify rather weak ones, so that the overall damping is within reasonable bounds.
On the 3 Litre as well as every Hydragas car the damping of pitch and bounce is separated: The interconnection pipe is taken off from the actual displacer, the lower chamber of the unit, where the piston goes in. The damping of pitch should be relative low and is determined by diameter of interconnection pipe or possible orifices therein. The damping of bounce is done as in every other Hydrolastic car using internal damper valves between displacer chamber and spring chamber. Hydragas just replaces the rubber with gas as a spring. The problem on the earlier cars was, that damping for both modes of movement was not independent. Leading to a slightly weak setting for bounce to make the interconnection more effective. External dampers are curing this fault directly, yet (IMO) destroying the beautiful purity of the system.
In a way the 3litre looks like the pinnacle: No external dampers, anti-roll bars or helper springs in sight. But - due to RWD - a much more complex rear arrangement than the neat set-up of the 1800.
Regards,
Alexander
unless you want a really harsh ride, the shock absorbers will only take a little load from the Hydrolastic units, as you'd want to specify rather weak ones, so that the overall damping is within reasonable bounds.
On the 3 Litre as well as every Hydragas car the damping of pitch and bounce is separated: The interconnection pipe is taken off from the actual displacer, the lower chamber of the unit, where the piston goes in. The damping of pitch should be relative low and is determined by diameter of interconnection pipe or possible orifices therein. The damping of bounce is done as in every other Hydrolastic car using internal damper valves between displacer chamber and spring chamber. Hydragas just replaces the rubber with gas as a spring. The problem on the earlier cars was, that damping for both modes of movement was not independent. Leading to a slightly weak setting for bounce to make the interconnection more effective. External dampers are curing this fault directly, yet (IMO) destroying the beautiful purity of the system.
In a way the 3litre looks like the pinnacle: No external dampers, anti-roll bars or helper springs in sight. But - due to RWD - a much more complex rear arrangement than the neat set-up of the 1800.
Regards,
Alexander
