New Rig

[JAMF]

Indeed. As there is no vertical movement in the motion pit above, it has to use the earth's gravity as the resulting G-force vector.

When for example the aircraft accelerates down the runway, the pit would pitch back to a certain angle, so that the simulated G-force from the acceleration "A" and the earths gravity "G" would combine in the force "F" on the avatar's body. If the acceleration of the aircraft is ~9.8m/s (1g), the pit would pitch back 45 degrees. It's not possible to increase the gravity with a stationary 3-axes motion pit, so no way to get "F" to 1.41g. If the aircraft with a tricycle gear were to brake with 2g, the pit would pitch forward 63.4 degrees.

I'm afraid you guys are a bit confused about the way G-forces interact with your body..
Pitching or rolling in an average commercial sim (like the Steward platform based ones) won't give you no appreciable simulation of G-forces (only a mere peak at 1.5 G at all), it will just simulate the bank or pitch angle at which you're flying.
The most advanced simulator is the DESDEMONA one, which is a combination of Steward platform plus a centrifugal one, and even if capable of sustained G-forces up to 3G, it's still nothing close to the average G forces you can achieve in an aerobatic plane or high performance aircraft.

info about DESDEMONA http://www.amst-germany.de/publics/desdemona_pub.htm

G-manouvers are because of centrifugal force, so the only effective way to reproduce those is to be in a centrifugal machine (which also doesn't give a full simulation because it doesn't take into account lateral loads, but only "head-to-toe" ones).

[swiss]

More important than G simulation would be a 360° view, imho.

Originally Posted by swiss

More important than G simulation would be a 360° view, imho.

Swiss, I think G simulation comes first because it's the main fatigue factor for a pilot. A 360 degrees view can be achieved with goggles or screens, there are clever ways around it.
No matter how good your aeroplane is, if you can't withstand G loads you're gonna be more vulnerable. I tell you this from personal experience: 15 minutes of intense aerobatic sessions can easily turn you into a sweatball. The first time I did aerobatics in a Mustang (and I was just a passenger!) I was in shock: it's all so physically intense that the idea of actually concentrating on a dogfight whilst being squeezed at 5.7 Gs is unfathomable unless you have been training hard..

I always think about it when I see our dogfights in the sim, where people keep on merrily pulling Gs for 20 minutes without actually thinking of how they would be exhausted by then... (which reminds me to post this on the "suggestions for Ilya" post!)

[swiss]

But you cant reproduce 5.7G in a machine which fits in your basement.
You sure could make people vomit though.

So, if I had the choice between these two...

Originally Posted by swiss

But you cant reproduce 5.7G in a machine which fits in your basement.
You sure could make people vomit though.

So, if I had the choice between these two...

hahahaha yeah, imagine a USB vomit-inducer

[JAMF]

Originally Posted by Sternjaeger

hahahaha yeah, imagine a USB vomit-inducer

Ah, that reminds me. There is a device that influences the balance organ in the inner ear, by 3 electrodes behind the ear and low voltage/current between them. The disadvantage was that it doesn't work for everyone. IIRC it was between 1/10 and 1/20 that noticed no balance change.

Would be fun to watch an IMAX roller-coaster ride with those things simulating the motions. That event would require a bucket by every chair.

[JAMF]

Originally Posted by Sternjaeger

I'm afraid you guys are a bit confused about the way G-forces interact with your body..

I understand that without vertical motion, one can't simulate variations in G-forces. Even with vertical motion, there's no way to simulate a sustained loading.

Without visual clues, you can trick the body a great deal though. With a short "jolt" at the beginning of a short acceleration and a very gentle deceleration, the mind has the impression the acceleration is continuous. When it's not correctly synced to the images, it could lead to puking your last meal. Or taking motion sickness medicine as a precaution.

Now, back to a motion device without vertical motion, the only way to give your body some sensation of the G-forces, is to simulate the direction of the force.