I’m David Knott. I’ve been working in enterprise technology for over forty years and I’m still learning. This blog is based on mistakes, failures, lessons and some things I find interesting:
Your Moonshot doesn’t have to be a Moonshot
In 1962, NASA faced a difficult technology procurement choice.
They needed a guidance computer for the Apollo Moon missions. Did they go for a design based on new technology, working with researchers at MIT, or a design based on proven technology from their existing suppliers?
They chose the new technology: rather than discrete electronic transistors, they would use silicon chips, which combined multiple transistors into a single component. These chips weren’t like the chips of today, though: rather than millions or billions of transistors, they contained just a few transistors, each representing a single logic gate. Thousands of them were needed to build the Apollo Guidance Computer (AGC).
Technologists are always crying wolf (because of all the wolves)
The computer had failed. Unfortunately, it was the Apollo Guidance Computer (AGC), the machine that controlled the flight of a small, fragile spacecraft to the Moon and back. Fortunately, it wasn’t in space: it was on the ground, in a simulator.
Margaret Hamilton, the leader of the MIT team programming the AGC, often had to work weekends to meet the urgent schedule of the Apollo programme, and sometimes brought her daughter, Lauren, to work with her. Lauren liked to play in the simulator.
If you’re going to land on the Moon, at some point you have to land on the Moon
The recording of the Apollo 11 Moon mission, just before the Eagle lands in the Sea of Tranquility, never fails to make my hair stand up. The tone of the astronauts is matter of fact, calm and professional: if you didn’t know the context then you would never imagine that they were engaged in one of humanity’s greatest endeavours.
And the more of the context you know, the more astonishing that air of calm becomes. Those last minutes before the landing were filled with alarms, unexpected behaviour from the lunar module, an overshoot of the planned landing site, and a search for a favourable place to land. By the time the module touched down, the craft had less than 5% of its fuel left, and was less than thirty seconds away from abandoning the mission. (This page gives a full transcript of the last 13 minutes before landing, and a great commentary on what was going on behind the words.)