1. SEMS and EMERGENCY LANDING ACCURACY - Annex
This is an indicative and never limiting application of the two New Physical Laws applications. On an aircraft, whatever be the flight configuration (slats/flaps), for
each value of the load, speed and angle of attack there is a unique Elastic Envelope (EE), with its corresponding exact value of bending/torsion for each point of
the structure. In the same way, there is a unique exact value of stress/twist for each strain gauge located at each point of the structure. This application is based on
increasing the accuracy of the measurement in the structural points, by replacing the structural plate at the point for a flexible strain gauge.
Such flexibility will depend on the measurement accuracy we want to get in real time of the lift or speed of the aircraft, relative to its load or weight. The strain
gauge’s body may be of the same alloy as the structure, or any other standard material according to criteria. This gauge can be integrated in the structure as
structural plates, or else isolated from said structure.
It is emphasized that the measure of the elasticity in real time allows us to obtain all the physical variables of the structure. For sample, in the case of the airplane
lift, we measure it directly by the elasticity that originates/creates, and not indirectly through the wind or speed as Pitot Tube. In the exact physics, the only way to
make an accurate/exact scientifical measurement is from the direct measure of the physical fact.
BOTTOM WING
= strain gauges
(the direction of the sensors in the wings
and stabilizers may vary according axes)
(in this application the strain gauges are
biaxial)
SHARKLET
FLEXIBLE ELASTIC
STRAIN GAUGE
WING’S PRESSURE
CENTERING
ELASTIC STRAIN GAUGE
SLIDING BASE
WING-FUSELAGE BOTTOM
MIGUEL CABRAL MARTÍN

2. LANDING APPROACH ANGLE (AOA)
α = Angle of Attack (AOA)
α
By measuring the whole elasticity (SEMS), we can know in real time the exact tilt or elastic rotation of any structural
point, to obtain the exact Resultant Angle of Attack (RAOA) of the aircraft. In other words, the rotation or elastic tilt of
the measuring point, will indicates the direction of the flight path vector or thrust vector of the structure at that point.
LANDING ANGLE (AOA)
Basically, the Elastic Angles of Attack (EAOA) at each point of the structure, correspond to the torsion
angles for each wing and stabilizer, and to the bending angles of the fuselage. The real-time resolution of
this system of angles and vectors allow us to the precise control of the landing maneuver, placing the
aircraft at the exact point at minimum speed or stall.
α
MIGUEL CABRAL MARTIN
RUNWAY

3. WATER LANDING`SLANDING
REAL WATER ACCURACY
The exact resolution of the elastic angles and vectors system is crucial for the safe water landing, in
order to get an accurate contact and sliding of the aircraft on the water. This will be achieved with the
precise configuration of the SLATS and FLAPS at the time of the contact.
α = Resultant Angle of Attack (EAOA)
α
water
SAFE WATER LANDING
MIGUEL CABRAL MARTÍN
water

4. This is a clear sample of what we can achieve in a simple and inexpensive way in civil aircrafts with “fly by wire” systems.
SYSTEM OF ANGLES and VECTORS
This annex is as clarification for those persons who does not have knowledge about Mechanical
Physics.
Theoretically, the ideal flight condition is when the value of the AOA is zero, this happens when
the direction of the thrust and the flight path are the same; but this is a physics’s art that I ask for
excuses by not to explain in this site. In any case, the measurement of the structural elasticity
will solve these systems of angles and vectors, in a simple and exact way easy to understand for
everybody interested in aeronautics.
VECTORS SYSTEM
LIFT
ANGLE OF ATTACK (AOA)
THRUST
DRAG
WEIGHT
In the Mechanical Physics the forces
are represented as vectors.
PITCH ANGLE
FLIGHT PATH ANGLE
MIGUEL CABRAL MARTIN
ANGLES SYSTEM