Originally Posted by
Yellow Sun
I don’t know when the UUPI was introduced, but it was around when I was instructing in the early ‘70s. I’m pretty sure the nose light flashed as there could have been potential for confusion with a steady white front and back.
Some versions of the Mirage also transmitted a superimposed tone in the circuit but I don’t know what the purpose of it was.
YS
This article explains the Mirage system to prevent landing with undercarriage still up. Unfortunately the system did not prevent the event!
Very commendably honest test pilot wrote the article.
https://qam.com.au/qam-content/aircr.../wheels-up.htm