The RRS TVC-33 exhibits excellend stiffness, especially for its weight. The damping however, is poor, resulting in small oscillations that take a long time to die out. This can easily be seen in the example data presented below.
|Stiffness About Vertical Axis||1509 +/- 4 Nm/s/rad|
|Damping About Vertical Axis||0.215 +/- 0.022 Js/rad|
|Stiffness About Radial Axis||3949 +/- 8 Nm/s/rad|
|Damping About Radial Axis||0.255 +/- 0.026 Js/rad|
|Weight||4.3 lbs (1.952 kgs)|
|Manufacturer weight rating||50 lbs|
|Maximum Height||58.4 in (148.3 cm)|
|Minimum Height||17.0 in (43.2 cm)|
|Base Diameter||3.0 in (7.6 cm)|
|Folded Length||25.8 in (65.5 cm)|
|Folded Circumference||14.1 in (35.8 cm)|
|Folded Volume||408.0 cu. in. (6.7 liters)|
|Leg Material||Carbon Fiber|
|Primary Leg Angle||26.0 deg|
|Top Tube Diameter||36.8 mm|
|Second Tube Diameter||32.6 mm|
|Third Tube Diameter||28.6 mm|
The stiffness and damping data are the averages of 10 trials for each measurement. The reported error is the standard error, except in the case of the damping data. I have set the error in the damping at 10% as the standard error metric does not appropriately capture the error in fitting to the data. All of the reported specifications are measured, with the exception of the weight rating. The tripod is measured at full height, with the center column down.
Example data for oscillations about the tripod’s vertical axis:
This tripod acts as a near perfect resonator, as shown by the fourier plot.
Now for oscillation about a radial axis from the tripod’s apex:
The resonance is not nearly as perfect for the radial data, but its still quite good. This makes sense, as there is much more going on.