Purely speaking we could calculate that using gravitational constant, denoted G, is an empirical physical constant, calculating the gravitational attraction between objects with a given mass (m1 and m2), being inversely proportional to the square of the distance (r) between them, then divide by the effective gravitational decline per distance from the pole – it could be done as a theoretical exercise
If you could measure the global distributions of meso-scale variances and refraction index “dry temperature” at different altitudes and continents, and the variances can obtained for each individual tyre type, compound and profile, from the manufacturers – we may be able to prove that calculation. Of course that’s predicated on the fact the tyre has been dry compressed filled from a clean air source with no greater than a 5% atmospheric discrepancy and a humidity factor of less than 30
Measuring humidity inside a tyre does present a small obstacle.
Then calculate that relative to the effect of weather on the weight of air to figure out what the pressure differential is between the internal tyer (Ipsi) and the external air pressure (Epsi) is at given speeds
That’s with out taking the fluxuating nature of gravity into consideration.
Could be an interesting thing to try
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