The Composite Force of the  Radiometer

I call the radiometer force a composite force as it includes the deceleration of the rarefied gas molecules in transferring molecular momentum to give the net acceleration of the radiometer vanes.  My testing is in a partial vacuum of 100 to 300 microns. I use a 60w halogen light focused on various weight aluminum strips with carbon black on one side. The strips were holed to freely move on a horizontal rod.

With the weightier strips, after a little back and forth movement, the strips would bind on the rod. Yet I observed a light weight, 0.002 gm, 1 cm strip, holed on one end to hang on the rod, that the strip moved first with agitation and then energetically around and along the rod.  Though a small mass,  I found the centrifugal motion could be made to have directional movement. 

With limited equipment I do not take the testing further. As a proposal for future testing I would next use a test "apparatus" with the "surfaces"  fixed to a light weight rod. The rod would be suspended at the ends with a fine wire. This test would determine if the net force could be directed to propel such a light weight "apparatus" forward. 

The forward movement would be limited by the mounting. Yet I feel the confirmation of a forward movement could open a possibility the application of a net force might cause the acceleration of a body by using the inertia of a body itself (rather than the earth) as the "accelerative base". I next visualize enclosing the "apparatus" with a transparent film, changing my perspective to a net force within a body. 

I feel a more full explanation of the radiometer would require studying the radiometer as an accelerative process. The study would include the initial energizing of the rarefied gas molecules. It would include the deceleration phase of the rarefied gas molecules and the resulting net macro acceleration.  It would explore the implied high molecular velocities across the vane surfaces. It would explore why there seems little offsetting back force in the net macro acceleration. The study would explore the efficiency of the transfer of molecular momentum to macro vane and harness momentum.

I feel the radiometer vane acceleration may represent a type of acceleration which may have the properties of earth engines combined with the properties of rocket propulsion. In rocket propulsion the propellant is the "other momentum". I note in a ball bouncing against earth inertia that one could recapture "this other end" of the momentum and/or change the direction of the momentum.

Could the radiometer composite force, using vane inertia as the base, be recapturing this "other end" of the momentum?  This would be almost as if the transfer of molecular momentum to macro vane momentum could be more than 50% of the momentum generated being applied to the vanes.

I feel in physics this composite radiometer force would be a special case.   and (note A) January 25, 2015 .