Sending mail using rockets in the 1930s - GIF

Rocket mail test conducted in the 1930s.

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Previously:

https://www.homemadetools.net/forum/...400#post188998
https://www.homemadetools.net/forum/...805#post159941
https://www.homemadetools.net/forum/...229#post150045
https://www.homemadetools.net/forum/...781#post133201
https://www.homemadetools.net/forum/...674#post136585

Maybe that is why my mail is still delivered by a guy in a pickup truck

In the following decade the Germans perfected this delivery system and used it to send eruptive messages to England.