"Doug Ellison" wrote in message ...
"pjo" wrote in message
...
Just picked up "The Mighty Saturns" set on DVD and have a question: what
is
the chirping sound, immediately following main engine ignition? It is in
all
the audio for the Apollo 7 launch clips and sounds a little like a
cricket,
or a ratchet in the background. Any one know what that is?

Excellent set BTW.

Try the Gemini set. It's the same 'canned' audio track for every GT launch
:O And similarly - this one has a strange chirpy noise as well.


Is that the "screech" noise made by the solid motor turbopump
startup of the Titan's first stage Aerojet engines?

- Ed Kyle