Ion thruster and pneumatic tube: what they have in common

1. Step 1. Ion thruster — uses — Reaction force. Jet thrust.
2. Step 2. Reaction force — is used in — Ramjet. Jet thrust.
3. Step 3. Ramjet — uses — Compressed air. The air is compressed by the oncoming flow.
4. Step 4. Compressed air — is used in — Pneumatic tube. Air pressure.

Open Evothings