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Crash Positioning Indicator
Crash Position Indicator
What?
-CPI (Crash Position Indicator) is system that shows where a crash is.
-Allows investigators to more easily find cause of crash.
-Was madatory in both Canadian and US flights.
Why?
The Black Box (CPI) was made after the first commercial jet powered airliner, the De Havilland Comet, crashed 5 times in a month.
Why?
Who invented it?
-Created by Harry Stevinson
-Harry Stevinson started his career at NRC, testing designs for gliders.
Who?
Where was it developed?
-Developed in US at NRC
-Some Australian ties
-Patented in Ottowa, Canada.
Where?
How did it work?
The patent for the CPI is US2959671A.
For further details, here is a link: https://patents.google.com/patent/US2959671?oq=Crash+Position+Indicator
Visuals
As it was being made, Harry Stevinson wanted it to be compact, like the picture shown below.