1. SEMS - RUNWAY, ROAD & HIGH-SPEED RAILWAY FRICTION CONDITION
“There is no subject in science, perhaps, on which there is a greater diversity of opinion than in the laws which govern friction; and the previous
experiments, though sufficient, in many cases, for practical purposes, yet by no means tend to bring the inquiry into any more settled state.” Nicholas Wood,
Treatise upon railroads, 1836. (THE ENGINEER’S AND MECHANICS ENCYCLOPEDIA, BY LUKE HERBERT, LONDON 1836.)
As explained before, for each situation of load, speed and angle of attack, we know that there is a unique elastic envelope (EE) whatever be the condition
of the runway surface, whether dry, wet or any other alteration. As shown in the figure on the following page (ELASTICITY SENSORS NETWORK), the
landing gears would be the structural points that we would take as reference, to measure the resultant elasticity from the first contact (or impact) of the
wheels on the runway surface. From the first contact (all sensors or structural points we decide) will give us an exact Resultant Elastic Envelope (REE),
which in turn, would give us the exact value of the friction of the runway at the point of contact, in real time (IRT) and conditions.
Consequently, these exacts values (physical and mathematically accurate), will let us determine the correct statement of the Physics Laws that govern the
friction for any type of wheels or contact between surfaces.
In the case of land transport, the taking of the measurements would be constant (IRT) while in motion, and will provide us in real time the exact measure
of time and space of braking.
α
FLIGHT PATH
α
θ
α = Angle of Attack (AOA)
θ = Pitch Angle = α (cuando α y θ
coinciden en la dirección)
α
Contacto
MIGUEL CABRAL MARTIN

2. ELASTICITY SENSORS NETWORK
= Landing Gear SEMS-Sensors
MIGUEL CABRAL MARTIN