Great little article from the 1949 Modern Mechanix that illustrates using gyro or as the article calls it “roto-chute” recovery. The article offers this as an alternative to mach busting pilots that need to escape.
Here is the gyro concept as illustrated in 1934

and here again in 1999

The ROTON

April 27, 2008 at 9:03 pm
Are the engineers on the first magazine supposed to look like they are running in terror from the whirling blades of death?
April 28, 2008 at 5:17 am
Hehe
Perspective truthwalker!
They are running toward a small model.
I finally was able to imagine it being a large device and saw your perspective. It now makes me laugh.