12-06-2019, 10:10 PM
Some aspects of the Seven design are very simple and bordering on the crude, but I don’t think any mechanical materials were in any way lacking.
I have often wondered to what extent the rear axle rolls back and forth on the shackles contributing to wander. It could part explain the alarming tendency for the car to rotate on corrugations.
Any radius rods would theoretically require the springs to be separated from the shackles.
As before my 1934 saloon seemed very under damped at the rear. On corrugations at any speed it required quick reactions to stop it shuddering around in a circle. On the seal if a broken edge was encountered at 50 mph or more the car would pounce, turn through about 15 degree, and required all my then young reactions to recover. If strayed into thick metal on unsealed roads it would snap into a terrifying roll oversteer lurch. With lever hydraulic s.a. was driven very extensively at 45 and more on unsealed roads and I am still alive. Seems to prove that rolling on the shackles not a major factor. Could be deliberately and controllably slid around roundabouts etc in the wet.
I dunno if there are any vintage hyd sas as effective as the slightly later Armstrongs. It is difficult to fit lever s.as in a workmanlike manner. My car now has Big Seven type fitted but not run since.
(written before last post appeared)
I have often wondered to what extent the rear axle rolls back and forth on the shackles contributing to wander. It could part explain the alarming tendency for the car to rotate on corrugations.
Any radius rods would theoretically require the springs to be separated from the shackles.
As before my 1934 saloon seemed very under damped at the rear. On corrugations at any speed it required quick reactions to stop it shuddering around in a circle. On the seal if a broken edge was encountered at 50 mph or more the car would pounce, turn through about 15 degree, and required all my then young reactions to recover. If strayed into thick metal on unsealed roads it would snap into a terrifying roll oversteer lurch. With lever hydraulic s.a. was driven very extensively at 45 and more on unsealed roads and I am still alive. Seems to prove that rolling on the shackles not a major factor. Could be deliberately and controllably slid around roundabouts etc in the wet.
I dunno if there are any vintage hyd sas as effective as the slightly later Armstrongs. It is difficult to fit lever s.as in a workmanlike manner. My car now has Big Seven type fitted but not run since.
(written before last post appeared)