Wednesday
- Read half of Rowing A Scientific Approach by J.G.P. Williams and A. C. Scott
- Gregg Steisberg was supposed to come in today to teach us to use the Vicon, but rescheduled for Friday
- Asked my ORIE friends how to compare curves for similarities. (I haven't taken stats yet). They said to take the difference at each point, square it or abs value it (to get rid of negative sign cancelling), then sum it up to get a number. We can try this with the curves of rowing on a boat and rowing on the various machines to quantify the similarity of the curves against real rowing. The issue now is how to normalize the curves so that each data point corresponds to the same action / part of the stroke...
Thursday
- Add and Connect links (aka roller chain offset link) came in. (#25) We bought it to better connect the flywheel chain and future adjustment to chain lengths. Because chains have an inner and outer link, adjustments to chains have to be done in twos, with the removal or addition of an inner AND outer link. Offset links are like inner and outer link converters, allowing just one link (the offset link) to be added or removed.
- Increase pretension in soft bungee to 11 inches
- Decreased pretension in stiff bungee to 3 inches
- The machine still makes strange noises, but it's hard to tell where they're coming from and what exactly is the problem.
- Handle still slips
- Seemed to work better when super soft bungee in parallel with axle chain is taken off