Let’s have a flywheel in rotation about the axis of rotation X and in turning about the axis of turning Y (Figure 1). The result is that the flywheel generates the famous gyroscopic torque about Z, perpendicular to the first two. The red arrows show the geometrical directions of the converted from X and Y to Z quantities and qualities. The Vector Multiplication (1) from the textbooks (we don’t need to cite textbooks) formulates that the magnitude of the gyroscopic torque is equal the quantity of motion about X times the angular speed about Y.

If we arrange the succession of the appearing of the participating quantities and qualities, on the way we record and read the equation (from left to right), we must record the incoming quantities and qualities (the quantity of motion about X and the angular speed of turning about Y) on the left, then the resulted gyroscopic torque on the right (2). But for the moment it is not so important, because the two ways equality mark predicts that the vector multiplication is satisfied in both directions: from left to right and from right to left as well. The remark just can help us to understand the situation.

Independently how we record the vector multiplication, both sides are connected by the two-ways equality mark “=”. Therefore having in mind the example with the apples from the Introduction we expect that if the angular speeds in X and Y create the gyroscopic torque in Z, the reversible conversion is natural and must be physically possible. Physically, the reversibility means that if we apply a torque to the flywheel about Z, the torque must be converted reversibly into an angular speed about X and another one about Y. Factually we expect that the red arrows (Figure 1) of the geometrical “forward” conversion must be completed oppositely, from Z to X and from Z to Y.

The question is critically important because: If the reversibility is not satisfied, the quantities and qualities will not be recovered, and disproportions will be collected. So, let’s say it again: The property of the reversible equalization of converted quantities and qualities means that: If we apply on the flywheel the exact torque about Y, we received during the “forward” conversion, we must make the flywheel to rotate about X, and also about Y with the exactly same angular speeds as before, because the two ways equality mark “=” promises it.

Let’s have the same flywheel from Figure 1, but in peace (see Figure 2). Then let’s apply a torque about Z equal the generated one in the Figure 1. The great question is what will happen? Will we receive reversibly the angular speeds in X and in Y as the two-ways equality mark predicts?

The great answer is: Not at all! Instead of the predicted result, we receive angular acceleration of the flywheel about Z, reversibly proportional to the inertial moment of the flywheel about Z, according to the Second Newtonian Law. Physically and experimentally we receive at the right side of the equation (1) qualities and quantities different then the ones predicted by the two ways equality mark.

The Newtonian Mechanics is not capable to recover the quantities and qualities in X and Y at the right side of (1) using the ones from the left side, because it doesn’t possess spatial properties (properties to transfer quantities and qualities from one to other degree of freedom). The Gyroscope is capable to transfer and convert the quantities and qualities from one to other degree of freedom i.e. from the right to the left side of the equation (1). But the Gyroscope fails to recover reversibly the quantities and qualities at the right side of the same equation (1) using the ones from the left side, because, as is seems, it possesses one way spatial properties. It looks that the only way to recover the quantities and qualities at the right side of (1) using the ones from the left side is to apply the gyroscope again, but somehow oppositely. Detailed analysis (not provided here) points that even if we apply the gyroscopic phenomenon differently by all possible ways, and as many times as we wish, we can’t recover the initial inertial state in full scale.

Recovering the initial state in full scale is not possible even if we take in account that, the specific of the generation of the gyroscopic torque is that only the axis Y is fixed (let’s say, to some vehicle). The axes X and Z are in turning about Y, and respectively the vectors of the angular speed about X and the gyroscopic torque about Z are in turning about Y constantly.

The influence of the turning axes X and Z can be avoided if we use the improved SDD (Sector-rated in Diametrical Direction) Flywheel, combined with appropriate motion about X and Y (Figure 3). It is explained in details in [1,2], and [3]. We receive the inertial machine from Figure 3 capable to perform one way transfer of quantities and qualities between fixed axes irreversibly and permanently. Taking in account the above capability, we can build our discussion on the idea that the irreversible transfer and conversion of inertial qualities and quantities is between three fixed to the Space, Earth or vehicle axes/degrees of freedom.

-There are one way equations in the Chemistry.

-Important role in the Quantum Mechanics play unidirectional equations from the type: If A is equal B, B is not equal A.

-There is one way transfer of heat from high temperature to low temperature bodies. It creates disproportion between the constantly decreasing high temperature heat and the constantly increasing low temperature heat (Entropy).

-One way conversions are widely used in the cryptography.

-In some aspects the math inequalities can be accepted as one way.

As it seams the concept for one way conversions/equations is not so strange for the Physics, although that (probably) it is news for the Classical Mechanics. To mark the one way conversions between both sides of the equation (Figure 4 a), a small arrow is used. The Author considers this not so appropriate because it doesn’t show that the quantities and qualities are equal, even unidirectional, instead to be for example unequal. Therefore the Author uses in his analyses compilation of the common two way equality mark with added arrow above (Figure 4 b). The simplified one way equality mark consists of one dash (the half of “=”) and arrow above (Figure 4 c).

We consider that the correct way to record the vector multiplication is to use one way equality mark. We record the vector multiplication following the succession of the appearance of the physical quantities and qualities. We direct the one way equality mark from left to right (Figure 4 d). If we follow the succession from the textbooks (Figure 4 e), we direct it from right to left. The one raw simplified version is shown on Figure 4 g.

Let’s record the full scale of the possible inertial conversions (Figure 4 f), including the Spatial and the Newtonian ones. We record the vector multiplication following the succession of the appearance of the physical quantities and qualities. The applied in Z torque doesn’t recover reversibly the quantities and qualities in X and Y on the left of the vector multiplication. Instead of this it crates angular acceleration of the flywheel about Z, according to the Second Newtonian Law. Since the Newtonian Mechanics is reversible, we connect both sides of the Newtonian Second Law by the common two way equality mark. The red arrows underline the directions of the physical conversions.

Factually the transferred and converted from X and Y into Z quantities and quantities remain in Z. We don’t forget that behind the records from Figure 4 exist real physical (inertial) phenomena.