DCS/ED 3-DOF starting project, need your help !

Please post a link to the full motor specifications and the gear ratio to be used.

Language is getting in the way, am I am not certain what you mean exactly.

Perhaps you can dual language post in French and English and one of our native French speakers could translate.

I think you mean you plan using AC motor 0.75kW, 93RPM/min, 64Nm, with 93RPM/min being at the gearbox.

I do not understand what you mean by reduction 15 and service factor 2.1.

In the plans you linked to in a previous post it lists 70mm levers for the motors. That would give good linear speed of 681.726mm/sec and, disregarding mechanical loss, 1000N, if what I assume are the correct motor specs.

I was using this handy calculator: http://www.endmemo.com/physics/rpmlinear.php

Do you know the intended load? That is what will really determine the CTC to use on the levers.

It takes 9.8N per kg to counteract gravity, so I expect you will likely end up using a CTC around 40-45mm.

That will drop the linear speed but it should still be OK at around 438.252mm/s.

To be honest it is impossible to comment on an external debate without knowing all of what it entails.

What you allude to are design considerations to meet a desired outcome: the linear speed, angle, length of lever, for car sim or flight sim are somewhat meaningless outside a particular design, as that design has implications for all those things.

For motion simulation there are 3 classes of sensory input: https://en.wikipedia.org/wiki/Motion_simulator

• Proprioceptors are receptors located in your muscles, tendons, joints and the inner ear, which send signals to the brain regarding the body's position. Aircraft pilots sometimes refer to this type of sensory input as the “seat of your pants”.
• The vestibular system contributes to balance and sense of spatial orientation and includes the vestibular organs, ocular system, and muscular system. The vestibular system is contained in the inner ear and interprets rotational motion and linear acceleration. The vestibular system does not interpret vertical motion.
• Visual input from the eye relays information to the brain about the craft's position, velocity, and attitude relative to the ground.

Proprioceptors do not operate in a steady state, say constant speed, only when there is a differentiation.

The vestibule system works by approximation and has a perceptual delay, so you can actually cue stimulation affecting the vestibule system in advance of visual simulation. Conversely, because there is a perceptual delay the faster the cues the better.

It is worth noting that VR works by exploiting your perceptual and processing weaknesses, and often involves manipulating your brain into false assumptions.

The requirements of the visual input for VR are well understood with respect to current hardware, and that is the best experience is where the visual input is maintained at or above 90fps. Things like re-projection, ATW and ASW can assist cover up some of the worst aspects of sub par visual performance, but none do so without some degradation.