Interesting but basically no 'news' 😉 if you know how forces and accelerations act on bodies, be it human, plane (or other) bodies. The basic formulas is something you learn already at school in physics lessons. Certainly learnt and studied more in depth during the course, e.g. in mechanical, aerospace etc. engineering - as demonstrated exactly with this video.
It also demonstrates how pilots can be tricked - they THINK they feel this and that, although reality (forces, accelerations, position in space, ...) is different. How do I know? Make a wild guess 😁.

I was once flying a Mooney from Denver to someplace in Wisconsin with a passenger who was going to pick up a car there.  We took off at about 3:00 AM and it was pitch black over eastern Colorado with few lights on the ground.  I sensed we were making a left turn until we got to Omaha and the sun came up.  I trusted the instruments to keep the Mooney flying straight and level.

Noel

2 minutes ago, birdguy said:

  I trusted the instruments to keep the Mooney flying straight and level.

Noel

Unfortunately, a lot of GA pilots (probably not IFR rated) only rely on what they may or may not see
out the cockpit windscreen.  Instruments rarely lie!

Always good food for thought - we were never meant to fly, and our senses are easily fooled.

Now, If I could just find the room and a few million dollars for a "good" flight sim 😎

57 minutes ago, UrgentSiesta said:

If I could just find the room and a few million dollars for a "good" flight sim 

VR flying is as close as it gets. and costs only $ 1.200 (Pimax Crystal Light) minus a few million dollars.

Interesting.

Ive recently added a 6 degrees of freedom motion rig with control loading yoke, rudder and stick to my VR setup.

It’s a whole new level of experience.

36 minutes ago, jon b said:

Ive recently added a 6 degrees of freedom motion rig

what software to drive the motion platform? simple direct axis rotation won't cut it to recreate acceleration, as the Delft university project has demonstrated.

It’s using sim racing studio.

It gets roll rate and pitch rate ok , and adds a lot of immersion though turbulence it’s enough combined with VR to completely change the simming experience.

My favourite bit though is actually feeling the touchdown.

5 hours ago, jon b said:

It gets roll rate and pitch rate ok

the interesting revelation in that Delft university demonstrations was: directly applying the sim's pitch and roll values is not enough to recreate acceleration, yaw and gravity, it needs special filtering to derive those values and to artificially re-create those effects. how they calculate and induce those forces artificially was the most interesting part for me.

for example: to create the sensation of acceleration during take off, the control software for the motion platform would have to send pitch up inputs to the actuators even though you are still level on the ground, and vice versa during  landing roll with strong braking needs to pitch down to create deceleration effects.

equally, un-filtered motion about the roll axis in a stationary platform would translate to a yaw effect, but not what you would experience in a coordinated turn in an aircraft if you simply applied the equivalent bank angle value from the simulator to the motion platform. that's why they chose the title " how to trick your brain".

ideally we would want 6 DOF, which I doubt a car racing platform would have. but 2 DOF is probably still a lot of fun if the control software does more than simply a 1:1 translation of pitch and bank.

I had always thought about getting a motion platform, especially now combined with VR. which motion platform do you have?

https://en.wikipedia.org/wiki/Six_degrees_of_freedom

Edited February 26, 20251 yr by turbomax

Yes the SRS software gives you the option to select pitch and roll angle or rate. The rate is as you say the correct option as it mixes in other forces to get the correct motion perception. Using roll angle results in the feeling of uncoordinated flight and the feeling of falling into the turn.

I often use pitch angle though as when flying military aircraft I like the sustained feeling up being pitched up in a high angle climb. Although I’ve recently stumbled across settings which reproduce the correct pitch up feeling and even though the platform has returned slowly to level, my balance system tells me I’m still pitched up, especially combined with the visual VR picture it’s a powerful deception.

There is also option to select “enhanced G forces” which feed in pitch to enhance acceleration perception as you mentioned .I really like that one when flying something like the milviz T6 and deploying the airbrake in a descent you feel yourself being pulled towards the front of the cockpit

The other issue when using VR with a motion platform is you have to employ a method of motion compensation otherwise your headset picks up on the platform’s motion and give the impression of moving around in the cockpit.

Luckily its easily achieved by using a little solid state gyro unit off amazon which feeds the motion into the software which then compensates, very clever.

Having been a reluctant user of the big multimillion dollar motion sims over the years their purpose is not so much to reproduce the same forces experienced in flight, which would be impossible, but rather just to fool the brain into thinking it’s on a moving aircraft, otherwise the motion vs view disconnect causes nausea.

The set up I have is a 6 DOF hexapod design from DOF reality, a P6, and Brunner controls.

3 hours ago, jon b said:

when using VR with a motion platform is you have to employ a method of motion compensation otherwise your headset picks up on the platform’s motion and give the impression of moving around in the cockpit.

interesting, never thought of that. 

the small size footprint looks interesting

like this one for some $ 10.000? seems to be their top version.

https://dofreality.com/product/racing/motion-racing-rig-6-axis-pro-p6/

 

how is the noise level, especially for other family members if you don't put it in the basement but in your room next door?

how smooth is the motion? does it feel edgy from the stepper motors or coarse?

did you have any technical or servicing problems yet?

Edited February 26, 20251 yr by turbomax

It’s very easy if you’re thinking of a motion platform, it’s just one of these..

https://www.amazon.co.uk/dp/B01N91GCJX?ref=ppx_yo2ov_dt_b_fed_asin_title

thanks Jon,

never expected this might re-ignite again my long term interest in a motion platform, even more so now with my Pimax VR headset. this combo seems to be as real as it gets for home users.

 

Edited February 26, 20251 yr by turbomax

4 hours ago, jon b said:

employ a method of motion compensation otherwise your headset picks up on the platform’s motion and give the impression of moving around in the cockpit.

perhaps one could mount and place some card box shield with bright dots/LED lights directly onto the platform around your head to let the VR cameras (non lighthouse devices) pick up your view direction? or does the gyro approach work perfectly?

is your platform as noisy as this?

 

Stewart platform

https://en.wikipedia.org/wiki/Stewart_platform

Edited February 26, 20251 yr by turbomax