An armoured observation gondola climbed above the smog ceiling on a tethered electric cable before a military audience.
What happened
Section titled “What happened”The date is approximate because the public demonstration and an earlier secret ascent were later merged in official histories.
Outcome
Section titled “Outcome”High-altitude observation became practical for artillery spotting and weather study.
Timeline role
Section titled “Timeline role”This entry demonstrates an event with standard importance, approximate certainty and month date precision.