Who is AWx?

Acceleration Worx bv or AWx, operates as an independent technology company providing Lm² motion upgrades for Level D Full Flight Simulators.

Director Cpt. Filip Van Biervliet is the inventor and patent holder of the unique Lm² motion control method. He graduated in 1982 as a M.Sc. in Aeronautical Engineering from Delft University of Technology, the Netherlands.

He became an airline pilot in 1986 and logged over 16.000 flight hours on large jets  B737, A310, A330 and the MD-11. He was involved in pilot training as a Type Rating Instructor and Line Training Captain for the last 23 years of his pilot career.

As a pilot-engineer, he has a passion for flight handling qualities, fly-by-wire and FFS motion control law design.

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Since 2013 AWx has teamed up with Tampa based CAE USA Inc.


What is Lm²?

Lateral Maneuvering Motion

"Motion Fidelity for Flight Handling Fidelity"

Flying the simulator and flying the aircraft often feels like completely different handling tasks: During taxi the simulated aircraft seems to sideslip over the runway. Flying the simulated aircraft especially during approach and landing often leads to overcontrol.

This originates from the phase error in motion perception compared to the outside visual scenery:

Generic flight simulator motion

The graph depicts lateral accelerations during a 10 seconds alternating manual aileron input, as felt in the cockpit seat of a Level D B737-800 simulator in landing configuration. One can clearly see that aircraft and simulator perception don’t match.

In contrast with this, aircraft and simulator motion do match once Lm² is installed:

Lm² motion algorithm

Lm² « Lateral Maneuvering Motion » is a patented motion control method* for full flight simulators of large transport category aircraft and helicopters.


It makes flying the simulator almost as real as flying the real aircraft**. Reactions to aileron, rudder and tiller control inputs become predictable and natural. 

Lm² manual flight training benefits:

Realistic taxi


Effective crosswind landing training

Stop motion sickness

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Added realism to UPRT


Realistic aerial refueling


Realistic approach and landing


Get rid of simulator only PIO

(pilot induced oscillations)

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Redefine manual flight training 


Next to real helicopter hovering


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* Patents:

European Patent No. 1 946 193

USA Patent No. US 8,393,902 B2

Canadian Patent No. 2,625,103

Other countries patented

** Lm² exceeds by design the motion fidelity criteria of the ICAO 9625 Objective Motion Cueing Tests (OMCT):

Unlike the ICAO 9625 OMCT, Lm² does take the position of the pilot relative to the aircraft center of gravity into account.​ It is obvious that on large aircraft and helicopters this important offset position significantly influences motion perception and thus control inputs by the pilot.