I could pull it slower or get someone to take readings as I do it. No matter, it was a good idea in theory... don't s'pose I'm going to buy a top of the range video camera just for that.
Here's the video and a still at full draw.
For anyone interested, here's the raw data. Decimals of inches were just estimates to the nearest 0.25
I've reposted the graph with the axes round the conventional way (and labelled)
For future reference I've put the long string back on the bow and measured the weight needed to get it strung. It needed 60# to get the tips back to brace. The 60# immediately disappears and the force draw curve shows zero force at brace height! Ain't physics and geometry wonderful?