Technical Drawing Plan

Today we had to copy a plan that an older student had produced, in the same scale and same symbols that were present

This turned out to be a complex task, although we could have just traced this plan, and passed it off as our own, we would not have gained anything.

the part that was particularly difficult, was the curve in the centre. Once you had the basic outline and the two centre circles, the hard part was to get the curve accurate, which I failed to do :(

Here is my attempt, and the mistakes come flying out, but I do plan to redo this task again at home from scratch, as I have now learnt how to accurately pinpoint certain key lines, to build the curve and also surrounding lines, but I'm happy to a certain extent with the progress made today, in terms of learning how to measure and use my set square properly, also accurate use of a compass.