Awesomatix EP Touring Car (A700 Shaft Drive)
#8671
Tech Elite
iTrader: (37)
Calculating Damping Ratio
Please forgive me if this seems like a question that only an engineer would ask, but has anyone calculated what the damping ratio is for different A and B distances? My car has the black, sealed dampers (which I believe contain 500cst?).
It would be handy if the damping ratio remained essentially unchanged by adjusting the A distance only (at least for relatively small changes), and considering how well the car is engineered, it wouldn't surprise me if this were the case.
Does anyone have a graph or spreadsheet they can share showing damping ratio vs A and B distances?
It would be handy if the damping ratio remained essentially unchanged by adjusting the A distance only (at least for relatively small changes), and considering how well the car is engineered, it wouldn't surprise me if this were the case.
Does anyone have a graph or spreadsheet they can share showing damping ratio vs A and B distances?
#8672
The manual (available online) has curves for the overall suspension stiffness for different A and B values. Not sure if this what you are looking for but its probably the closest thing you will find.
The older dampers (marked D6) had something like 60k oil in them, but the construction was totally different to the new D2 style rebuildable dampers. Low speed damping is similar to D6 with 500cst in D2s, but hi speed is very different due to the different damper design
The older dampers (marked D6) had something like 60k oil in them, but the construction was totally different to the new D2 style rebuildable dampers. Low speed damping is similar to D6 with 500cst in D2s, but hi speed is very different due to the different damper design
#8673
It would be handy if the damping ratio remained essentially unchanged by adjusting the A distance only (at least for relatively small changes), and considering how well the car is engineered, it wouldn't surprise me if this were the case.
Does anyone have a graph or spreadsheet they can share showing damping ratio vs A and B distances?
Does anyone have a graph or spreadsheet they can share showing damping ratio vs A and B distances?
#8675
Tech Elite
iTrader: (37)
The older dampers (marked D6) had something like 60k oil in them, but the construction was totally different to the new D2 style rebuildable dampers. Low speed damping is similar to D6 with 500cst in D2s, but hi speed is very different due to the different damper design
Do the new dampers have more or less damping at high velocities, given equal damping at low velocities?
#8676
Tech Lord
iTrader: (86)
My dampers have a "3" stamped on the outside. Would these also be the old construction? If I recall correctly from reading this thread, the old style used nested cylinders that worked the fluid in shear, while the new ones have vanes and orifices-- is that right?
Do the new dampers have more or less damping at high velocities, given equal damping at low velocities?
Do the new dampers have more or less damping at high velocities, given equal damping at low velocities?
Last edited by OVA; 08-14-2015 at 12:44 PM.
#8677
My dampers have a "3" stamped on the outside. Would these also be the old construction? If I recall correctly from reading this thread, the old style used nested cylinders that worked the fluid in shear, while the new ones have vanes and orifices-- is that right?
Do the new dampers have more or less damping at high velocities, given equal damping at low velocities?
Do the new dampers have more or less damping at high velocities, given equal damping at low velocities?
The old dampers in hi speed (bumps) would shear badly and lose damping. The new dampers pack in hi speed like typical tc shocks do.
#8679
Tech Master
iTrader: (1)
when it comes to the rfg how much movement would there be? same as the front? looking at the diagram and attaching all 4 screws from the am-82 to the am81 and am44-1 this would not allow it to move because the complete assemble is attached to the mm2 and chassis, thus creating one solid piece
#8680
R/C Tech Elite Member
iTrader: (28)
when it comes to the rfg how much movement would there be? same as the front? looking at the diagram and attaching all 4 screws from the am-82 to the am81 and am44-1 this would not allow it to move because the complete assemble is attached to the mm2 and chassis, thus creating one solid piece
#8683
Anyway... Clean the teeth and use some type of dry lube on them between race days and you will be fine. For what its worth, every time I see the car of some high end Awesomatix driver they never have the diff covers on
#8684
Tech Elite
iTrader: (37)
However, I did find that the handling gets a little funky if the set screw that holds the SPR02 lever arm into the shock loosens and falls out.
EDIT: The dampers are actually L6/R6; I was looking at the wrong side, apparently. I have no idea what the "3" that is stamped on the other end means.
#8685
Tech Elite
iTrader: (37)
Does anyone have a good way of holding the SPR01 onto the little pin on the inboard end, so it doesn't pop off while installing the spring/damper assembly in the car? I'm not against using a little dab of glue, but maybe there is a more elegant solution.
Last edited by howardcano; 08-15-2015 at 06:03 AM. Reason: Changed "shock/damper" to spring/damper".