Idealizing a stationary behavior, ignoring mechanical losses and considering only locked wheel, the principal gear induces a tangential force to lateral gear that is:

with *R _{P}* primitive radius of principal gear.

*F*produces a torque on the wheel, about its principal axis:

_{P-L}with *R _{L}* primitive radius of lateral gear. The unilateral bearing, fixed to support, stops lateral shaft relative rotation.

*T*is balanced by reaction that input shaft exerts on support

_{L}*F*at a distance

_{S}*R*from lateral shaft axis:

_{P}+R_{L}Respecting force equilibrium for the lateral shaft, force F_{D} which lateral shaft exerts on disk slope is:

Producing a torque on output shaft T_{OUT}:

with *R _{c}* distance between output shaft axis and lateral shaft axis.

*R*could be easily found analytically using analytical relationships collected in the paragraph “Analytical Cinematic model”.

_{c}*T _{out }*has its minimum value for

*R*minimum value, i.e.

_{c}*R*, with

_{c min}= R_{L}+ R_{P }- TS*TS*input-output shaft offset.

Even if *T _{in}* is set constant,

*T*and velocity ratio vary in one output shaft revolution because R

_{out}_{c}varies.

For example, for an input torque *T _{in}* = 100 Nm and a shafts offset

*TS*= 20 mm, one can calculate:

Analogous results can be obtained with numerical simulations where is set the same constant *T _{in}* and

*TS*as shown in the figure below. In the diagram are reported the plots of resistance torque with time derived by the output shaft, and torque transmitted by the contact between one lateral shaft and its relative disk slope. Single lateral shaft contributes to transmit positive torque to output shaft only for a quarter of revolution period of the disk for reasons described before.

Minimum numerical value of output torque is similar to *T _{out min}* above calculated using the analytical model. This means that ideal hypothesis made for formalizing the model are not so far from reality.