Inertial drive...

[iacob alex]

.....if we start with a common principle (two synchro contrarotating planar masses ) , as :
     https://solutionsinmotion.clevelandvibrator.com/wp-content/uploads/2015/08/RE-Rotary-Electric-Principles-copy.jpg
.....we can play vibration as a "TO and FRO" (linear) vector.
     Now , we need a TO ( tractive...) vector , only...
      Let's make a possible simple transition to spatial  vectors...
     If we introduce one more ( equal ) rotation , as :
     www.geocities.ws/iacob_alex/Disclosed_experiments/grab0060.JPG
....we play a circular semi-space vector (summum of two Viviani curves ).
      If we add a similar synchro rotating pair , can we play a "clean" stable , pulsatory TO vector ?
       Al_ex

[iacob alex]

.....has an idealized trajectory of the summary vectors ( 1:04 to. 1:45 ), in a semi-space , at :
     https://youtu.be/GyPaRTy-RII
......but we can obtain it playing double of :
     www.geocities.ws/iacob_alex/Disclosed_experiments/grab0060.JPG   (1999)
.....something simplified , but alike :
     https://youtu.be/XXfJwcriE7s
     Anyway , the starting point is Alfio di Bella patent (1967) :

     https://youtu.be/lyUemImHU3Y
     and Viviani trajectory curvature ("smooth " double rotating...) in a semi space ( sphere ):
     https://mathworld.wolfram.com/VivianisCurve.html
     Al_ex