related to smoke signals..

going back to the mention of smoke signals, "skywriting," as its known, is a form of smoke signal where a plane would use a pressurized container of oil which is injected through the exhaust leaving a white trail.

In turn the plane would then fly accordingly to spell out letters numbers and symbols inthe sky. the message evaporates rather quickly once its displayed so the skywriting technique is normally for small messages, or designs.



a further developed idea of this could be to use a form of glowing oil, as found in "glow sticks." The combination of the isolated substances found within them creates a chemical light.

Using this a mix of this oil and the pressurized canister oil to have an aircraft produce glowing messages in the sky.. with a possibility of having the messages only visable though a certain display/lense/glasses etc..



this could result in night time "stealth" messages as only the receiving participants would be able to see it using their viewer whichever that may be.