The recent nomination for the Jodrell Bank telescope to receive world heritage status brought back some fond memories.
Back in 1968 I was a young 17 year old apprentice draughtsman working for a structural steelwork company called Teesside Bridge & Engineering. We had just been awarded the contract to provide the supporting structure for an enhanced surface to the Jodrell Bank radio telescope. The work involved supplying triangular bracing supports between the existing dome and the new dome.
The latest acquisition in the design office was an Olivetti Programma 101 - probably the world's first programmable calculator, which cost £1500 back in 1968 (£30000 in today's money!). Some of the senior designers were sent on a course to learn how to program it. And I read the instruction book and discovered the art of programming, soon becoming known as the expert on the new machine. During this time, a senior draughtsman came up to me and asked if this new box could help him with some calculations. He was calculating the lengths of the diagonal bracing between the two parabolic surfaces using Smoley's book of seven figure log tables and trigonometric values (a 400 page volume!). Each bracing length was taking him over 45 minutes to calculate. So I set to work using the 120 step programming machine with 12 numerical registers and built in functions for add, subtract, multiply, divide and square root. (no built in trig functions - these needed to be calculated using an iterative loop to process a series formula.) The 120 steps could be increased to 240 steps by sacrificing some of the numerical registers. When the time came to test it against the draughtsman's hand calculation, there was an audience comprising chief draughtsman, chief designer and several senior draughtsmen. After entering the data we all waited while the green light blinked on and off to indicate it was working. I was saying my prayers that the red light would not come on to indicate an error - (divide by zero or root of a negative number). After about a minute the machine finally chugged into life and printed an answer, which was deemed to be correct.
So I can now look upon this future world heritage site and take pride in the knowledge that at the tender age of 17 I helped calculate the exact lengths of all the diagonal braces between the two parabolic dishes! And it helped set me off on a new career in computer aided design and development.