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  Apollo 16: Launch countdown and callouts

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Author Topic:   Apollo 16: Launch countdown and callouts

Posts: 344
From: Hudson, MA
Registered: Jul 2005

posted 03-19-2013 10:57 AM     Click Here to See the Profile for Paul78zephyr     Edit/Delete Message   Reply w/Quote
In this YouTube video, who says 'ignition sequence has started, engines are armed'? Is that one of the crew? Why is there a callout of the engines being armed - doesn't that happen automatically by the launch sequencer? Or is the crew taking some manual action inside the CM? Ive not heard that callout on other Apollo/Saturn V launches.

Also can anyone tell what (word) is said just before 'you have good thrust in all five'?

Jim Behling

Posts: 537
From: Cape Canaveral, FL
Registered: Mar 2010

posted 03-19-2013 12:50 PM     Click Here to See the Profile for Jim Behling   Click Here to Email Jim Behling     Edit/Delete Message   Reply w/Quote
Originally posted by Paul78zephyr:
Is that one of the crew?
Not the crew. Likely that is one of the test conductors or the console position in charge of the sequencer much like CGLS for the shuttle. They would just be calling indications that the event had occurred.


Posts: 183
From: Albany, Oregon USA
Registered: Jul 2006

posted 03-19-2013 02:28 PM     Click Here to See the Profile for mach3valkyrie   Click Here to Email mach3valkyrie     Edit/Delete Message   Reply w/Quote
I think it's Paul Donnelly, Launch Operations Manager.

Also, I think the word is "roll", as in roll program. "...roll, you have good thrust on all five." Maybe the word 'Roger' preceded it. Gordon Fullerton was the capcom in Houston.

There are a lot of clipped transmissions early on Apollo 16's launch.


Posts: 400
From: Bethesda, MD
Registered: Jul 2003

posted 03-26-2013 10:56 PM     Click Here to See the Profile for Go4Launch   Click Here to Email Go4Launch     Edit/Delete Message   Reply w/Quote
I'm pretty certain that voice is not Paul Donnelly, who would not have been making that sort of call-out on the loop.


Posts: 84
From: Melbourne, Victoria, Australia
Registered: May 2009

posted 03-26-2013 11:35 PM     Click Here to See the Profile for ozspace   Click Here to Email ozspace     Edit/Delete Message   Reply w/Quote
I have another audio question, this one is from the Apollo 11 launch.

Can anyone tell me who "Ralph" may have been? I assume one of the technicians monitoring booster performance in Houston?

I love the little discussion on the start bottle pressure red line being lit and the line "...everything is go Ralph" at 1:40!

All times are CT (US)

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