By Carmelo Turdo |
Left to right: Roy Riter, part of the Cape Canaveral Launch Team; Jerry Roberts, Guidance and Control System Engineer; Bob Schepp, Electrical Engineer - Autopilot; Norm Beckel, Electronics Engineer - Communications Systems; Earl Robb, Structural/Mechanical Engineer; Ray Tucker, Electrical Ground Support Engineer; Lowell Grissom, Sales and Marketing Director and brother of Astronaut Gus Grissom; and Dean Purdy, Electrical Engineer.
Jerry Roberts |
Jerry Roberts, Bob Schepp, Norm Beckel, Earl Robb |
The Mercury spacecraft team was assembled from many current employees, although the new Space Division was formed to take on the project. Panel members Norm Beckel and Bob Schepp were transplanted from the budding F-4 Phantom II fighter program to work on the new spacecraft. Norm Beckel: “When the Mercury Program came along, they divided the groups into aircraft and space/missiles. I was moved from the Phantom to Mercury…” Bob Schepp: “I was working the F-4 autopilot flight testing when they called me to Mercury, and from then on I was full-time Mercury.”
Design of the Mercury
spacecraft was also a topic of interest to the group. Several panel
members responded to a question regarding commonality of equipment between
aircraft and spacecraft and the use of off-the-shelf equipment. Dean
Purdy: “One of the ground rules on Mercury was to use available equipment when
we could…But we used different materials than on aircraft – titanium rather
than aluminum.” Bob Schepp: “The autopilot was similar to what was used
in airplanes. We had to use thrusters
instead of ailerons, so the output was different.” Norm Beckel: “The main
criteria was size and weight…items had to be built to fit into a small spot.”
Jerry Roberts: “This was at the advent of the transistor…it was still very
difficult to miniaturize anything…”
The controversial window design was
also discussed. Dean Purdy: "A very small round window and
periscope were provided – the astronauts wanted bigger
window." Bob Schepp: “All the windows had inscribed on them the
various pitch angles to line up the horizon with the attitude of the
spacecraft. That was in case the
autopilot didn’t work. Cooper used the
scribe in the window to line up with the horizon for reentry.”
The Mercury spacecraft program
introduced the astronauts into the design and production process, a
phenomenon known as the "astronaut interface." Earl Robb: “All
of us loved to work with the astronauts. McDonnell Aircraft established a
McDonnell astronaut, Bert North. He was
a test pilot. He was the interface with
the astronauts.” (Mr. North is now in
ill health and was unable to join the panel). Bob Schepp: “Most of us
enjoyed talking to the astronauts because they were engineers…It was really fun
talking to Gus (Grissom) because he had to learn our autopilot. We spent hours trying to convince him how
that gyro worked…” Jerry Roberts: “He (Grissom) spent hours trying
to convince us it wasn’t designed right!”
All in all, the panel was in
agreement that working at McDonnell Aircraft during the space race was a very
satisfying vocation. Jerry Roberts summed it up well: “We worked until
the problem was fixed, but we never dreaded going to work…What could you do
today that has never been done before, of that magnitude? It’s hard to imagine what we didn’t know at
that time."
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