Motion platform using pneumatics

Hi...
I'm embarking on a new VR motion platform using SimTools and Arduino.
Does anyone have information on builds that use pneumatics instead of the high torque motors please?..
Is it even possible?
Thanks in advance,
Harry

Guessing from the sound, the rig in the video above uses normal poppet valves to control the air volume in the cylinders. This results in very limited control. The compressability of the air somehow "softens" the abrupt on/off switching of the valves but you don't have any control over the speed the actuators move. Ideally you need proportional valves. These are very expensive and still don't provide precise control of the pistons because position not only depends on the air volume but also on pressure which is influenced by dynamic movement and the other actuators.

Hydraulics and proportional valves would provide good controllability but is even more expensive. Around 30 years ago when electrical servo motors were horribly expensive I had the idea to build my own proportional valves from ball valves and model servos. But today you can get a complete 1HP servo with driver for ~$130 so unless you need very high power hydraulics are just not economical.

Thanks for your help, and I take your point. I wondered why I couldn't find anything on them.
Cheers,
Harry