“What do we do now?


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LM ascent engine

One of the advantages one gets from writing books and giving lectures about them is that you get to see some interesting places and meet some interesting people. This is what happened to me last week when I gave two lectures about the Apollo 8 mission to the Moon on consecutive nights to three different Buffalo aerospace organizations at two different venues. My entire visit was as a guest of the Niagara Frontier Section of American Institute of Aeronautics and Astronautics, as part of its Distinguished Lecturer program, something I have participated in now for almost a decade.

The first lecture was at the Niagara Aerospace Museum. Prior to my evening talk Don Erwin, a member of the museum’s board of trustees, gave me detailed tour of the museum and its holdings, which include a wealth of artifacts going back to the very beginnings of flight and running through the Apollo lunar missions. Many of aviation’s first innovators came from the western New York area, and the companies they created ended up building important components for the later U.S. effort to get to the Moon.

looking into ascent engine nozzle

Above on the right is one of their more significant artifacts, a lunar module ascent engine. Built mostly by Bell Aerospace, this particular engine was used to test the engine to make sure the design would work. It had to work, by the way, since it had no back-up and if it failed then the astronauts would have been stranded on the Moon.

Since it really only had to work reliably once, however, the nozzle was made of ablative material rather than a heavier metal. The second image on the right looks into that nozzle, where you can see the result of the various test firings done to prove out the engine. There is obvious wear to the interior of the nozzle.

What made this museum especially fun was how accessible everything was.

I could literally poke my fingers into this engine if I wished. This made it very easy to clearly see the design and its execution, which further impressed me with its simple elegance. The museum’s helicopters, early Wright-era biplanes, and other Apollo artifacts were all right there, in plain sight, with few if any barriers between me or the item. Later I could see up-close the inside of a partly assembled bi-plane, inspect the inside of the main engine to the Agena engine that played a crucial part in the Gemini rendezvous and docking missions, and touch a mission control panel used during the Apollo missions.

I was especially impressed with the helicopter section of the museum. They not only had a nice collection, but it touched on aspects of the history of helicopter development that I had not known before.

The next night I spoke to a joint dinner run by both the Niagara Frontier section of the AIAA as well as the Aero Club of Buffalo. The latter is especially interesting, as it is the second oldest aeronautics club in the world, formed in 1910 out of several earlier organizations tracing their history back to 1879.

At that dinner I was introduced to a cheerful but aged man in his nineties by the name of John Senneff. As my host Walter Gordon explained to me, “John Senneff worked on the Agena and LM ascent engines and flew P-47s over Europe in World War II. He was both a ski instructor at Kissing Bridge and flew his personal Mooney aircraft into his late 80s.” He also was one of the engineers who built the attitude systems for both the Mercury capsule and the space shuttle, a range of design that I thought quite impressive.

He was not so impressed with himself. When I told him how struck I was with the brilliance of the LM ascent engine, he grinned and said, “Most of the time we just looked at each other and said, ‘What do we do now?'”

That humility is exactly why the United States was able to get to the Moon in the 1960s. While everyone understood the challenge, everyone also recognized that it would take ordinary people doing extraordinary things to make it happen. They knew they weren’t so wonderful that they couldn’t screw it up. It made them humble, and also very careful about what they did.

I leave you with one last fascinating historical tidbit from my tour of the Niagara Aerospace Museum: Did you know that the screens on the Apollo mission control consoles had nothing directly to do with computers? The assumption I had always had was these were computer screens with the data from the computers being feed directly into those screens, as it was obtained and calculated.

Nope. These were television screens. In the main computer rooms below the data was projected on other screens, which had television cameras aimed at them. The data seen in mission control was information televised to the room, by camera. The controls on the mission control panels were merely switches to allow the operator to choose which television image he wished to view. All computer work was controlled elsewhere, by others.

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6 comments

  • C Cecil

    No igniter needed.

  • Kyle

    I had to look up old Apollo Mission Control pictures and sure enough some of those “computer” monitors were “streaming” live video. I always thought those were all computers.

  • Interesting tidbit about Mission Control. In Houston a few years ago and visited Johnson Space Center. Very cool. I was in Buffalo a couple years ago but did not know about the museum. I like Buffalo, and next time there I’ll visit.

  • mike shupp

    Lovely post, Mr. Zimmerman. I gotta admit, I sometimes moan about our different political slants on non-space related issues but on stuff that matters to both of us you do score quite often. So I’m making a contribution — you and Beyond The Black merit it.

  • mike shupp: Your donation is deeply appreciated. Thank you, from the bottom of my heart.

    After many years of fighting editors to write what I want, I am finding it very gratifying as well to do this webpage, where I write what I want, get it published instantly, and discover that people like it so much they willingly give me money to keep doing it. For this blessing, I am also infiintely grateful.

  • wayne

    This, is a great little video–

    “Birth of the Bell Helicopter”
    November 1977
    Arthur Young, Bart Kelly, and Test Pilot Floyd Carlson
    (Video provided by the Niagara Aerospace Museum)
    https://youtu.be/k562IriqnlA
    27:05

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