The weather has been pretty nice the last month, if a bit wet.
I've made a few small changes. I made a new bottom for my battery rack. The old one was 2" wide stainless channel, like the two vertical members, so the battery hung at an angle, resting on one edge. Also the rack had no front-to-back bracing. This allowed the battery and rack to move front-to-back slightly with each pedal stroke. Naturally, the rack bottom fatigued, and started to crack at the ends. I fab'ed up a new bottom from 1/8" aluminum (printer plate from a job 35 years ago), 4" wide this time, with 1" edges bent up to hold the battery in, level and secure. No need for toe straps to keep it in place now. Also, to make the rack stable front-to-back, I pop riveted a back wall to the rack, made from thin stainless steel (from our dead toaster oven.) The battery rack mods, minus the toe straps, added about 4 ounces.
I also swapped out the 53 tooth chainring for an old 52 tooth, Sugino Cycloid, elliptical chainring, I had once run on a fixie. This is a true elliptical ring, set up and run like a Q ring.http://www.rotorbikeusa.com/pdf/Q-Ring% ... ctions.pdf
Feels good, so I'll stick with it.
Also added a bungee to stop the fork from flopping at rest. A hand on the bar would prevent it..unless you were reading a map with both hands, and it flopped around, and you fell on your arse...hypothetical, of course.
Did 102.8 miles yesterday, 20.8 mph average, 9.1 Wh/mile. Used 23.99 amp hours from my 30 amp hour pack. All on smooth, straight, rolling, state and county roads. Sunny, breezy, high of 90 F.
[edit: 6575 foot climbing, mostly single digit grades]
I was taking it easy, because of the heat, so was adding about 100 watts average. This would come to 13.9 Wh/mile for non-pedalers, and would reduce range by at least a third.
replaced tires at 3367 mi.
replaced chain at 3444 mi.
4064 miles, 11.04 Wh/mi average