RRS TVC-33 Test Results

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.

NameRRS TVC-33
Stiffness About Vertical Axis1509 +/- 4 Nm/s/rad
Damping About Vertical Axis0.215 +/- 0.022 Js/rad
Stiffness About Radial Axis3949 +/- 8 Nm/s/rad
Damping About Radial Axis0.255 +/- 0.026 Js/rad
Retail Price$975
Weight4.3 lbs (1.952 kgs)
Manufacturer weight rating50 lbs
Maximum Height58.4 in (148.3 cm)
Minimum Height17.0 in (43.2 cm)
Center ColumnNo
Base Diameter3.0 in (7.6 cm)
Folded Length25.8 in (65.5 cm)
Folded Circumference14.1 in (35.8 cm)
Folded Volume408.0 cu. in. (6.7 liters)
Leg MaterialCarbon Fiber
Leg Sections3
Primary Leg Angle26.0 deg
Leg LocksTwist
Top Tube Diameter36.8 mm
Second Tube Diameter32.6 mm
Third Tube Diameter28.6 mm
Exchangeable FeetYes
Foot TypeRubber

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.