The Lafforgue's Field Propulsion Thruster Calculator
By Jean-Louis Naudin
created on January 25, 2002 - JLN Labs - Last update January 30, 2002
All informations in this page are published free and are intended for private/educational purposes and not for commercial applications

Isolated systems self-propelled by electrostatic forces  by Jean-Claude Lafforgue ( France )
No. Publication (Sec.) : FR2651388 
Date de publication : 1991-03-01  
The electrostatic forces are "generated" by the interaction of polarised atoms (q) on an electric vector field (E), i.e. F=q.E, positive or negative according to the sign of (q). By suitable geometry of the polarised armatures, and/or by the use of electric charges induced by induction effect, and/or by the use of suitably arranged dielectrics, it becomes possible to break the symmetry of the expansion forces on one of the axes of the three-axis reference system and thus to obtain a non-zero resultant force (Fn). The isolated system is then propelled, and it draws the charges (q) and (E) along with it, thus F=q.E remains constant. This force can be used as a means of propulsion for any vehicle or even as motive force for producing energy.

Drawing not to scale

For all the details about the Physics formulas used here, see the Lafforgue's patent FR2651388 page 5 to 7

Lafforgue's FPT calculator v1.05 - JL Naudin - Updated January 28, 2002
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The equation below is the original Lafforgue's equation used in the patent FR2651388 page 5 to 7

eo -permittivity of free space (coul/Vm) :
Asymmetrical capacitor specifications
er – dielectric permittivity : (1) e - dielectric gap (mm) : (2)
Ra - alpha radius ( mm ) : (3) L - capacitor thickness ( m ) : (4)
Power supply specification
V - voltage ( V ) : (5)

Capacitor sizes ( calculated ) :
D - ( mm ): F - ( mm ): H - ( mm ):
W - LFPT wide ( mm ): Rb - beta radius ( mm ):
AREA - A :
Fa - force (N) :
C - capacitance (F) : q - charge (C) :
Fja - alpha force (N) : Fjb - beta force (N) :
Fc - force (N) :

F - Resulting THRUST (N) :

The Lafforgue's F.P.Thruster Solver v2.0

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