Archive for category Recumbent Bicycling
The blinky light on Mary’s bike became intermittent and, after a week or two, I figured out why:
The white plastic case has a thin section labeled PUSH over the switch. After five years of exposure to the sun (it faces upward on her bike) and upwards of 2000 pushes (5 years x 200 rides/year x 2 pushes/ride), the edges of that little plate cracked, it slipped inward, and jammed the switch button.
I swapped it for the one on my bike, which mounts with the switch downward and has seen much less use since I began running the Fly 6 rear camera + blinky light, and it was all good.
The fractured plate slid snugly back in place, a few drops of IPS 3 solvent-bonded the broken edges, and a snippet of good 3M electrical tape inside the case should provide a bit of reinforcement:
It’s now on my bike, just in case it’s needed.
That was easy …
The first pleasant day after a long string of snow and rain got us outside again:
The honeybee at Mary’s elbow escorted us for a bit, then flew between us and continued on her mission.
Despite appearances, she passed a few inches from my helmet:
We all agreed: it was a fine day for a ride and a flight!
One of the clips holding the rear fender on my Tour Easy broke:
Well, if the truth be told, the fender jammed against the tire when I jackknifed the trailer while backing into a parking spot, dragged counterclockwise with the tire, and wiped that little tab right off the block. After 16 years of service, it doesn’t owe me a thing.
Although the clip around the fender sits a bit lower than it used to (actually, the entire fender sits a bit lower than it should be), you can see the tab had a distinct bend at the edge of the aluminum block supporting the underseat bag frame: the block isn’t perpendicular to the tire / fender at that point.
After devoting far too long to thinking about how to angle the tab relative to the clip, I realized that I live in the future and can just angle the clip relative to the tab. Soooo, the solid model has a rakish tilt:
The original design had a pair of strain relief struts where the tab meets the clip, but I figured I’ll add those after the PETG fractures.
I mooched the small bumpouts along the arc from the original design; they provide a bit of stretch & bend so to ease the hooks around the fender.
The hooks meet the clip with very slight discontinuities that, I think, come from slight differences between the 2D
offset() operation and the
circle() diameter; the usual
1/cos(180/numsides) trick was unavailing, so I tinkered until the answer came out right.
Despite those stretchy bumps, it took three iterations, varying the chord height by about 1.5 mm, to securely snap those hooks onto the fender:
Yeah, sorry ’bout the fuzzy focus on the screw head.
It’s impossible to measure the chord height accurately enough in that position and I was not going to dismount the rear tire just to get a better measurement.
You can see how the clip’s rakish tilt matches the fender’s slope, so the tab isn’t bent at all. It’ll probably break at the block the next time I jackknife the trailer, of course.
I heroically resisted the urge to run off a lower fender mount.
The OpenSCAD source code as a GitHub Gist:
The original doodle, with some measurements unable to withstand the test of time:
This big branch must have landed with a mighty thump across the Maloney Road entrance to the Dutchess Rail Trail:
Yeah, some jerk ran a snowmobile up the slope around the tree, leaving a pile of dirt on the ramp. So it goes.
We took an alternate route, I emailed The Right Folks, and (most of) the tree vanished two days later; evidently, the property owner gets to deal with everything to the left of the line of trees.
These guys looked completely disgusted with the situation:
They’re about 130 feet away in a heavy snowstorm that eventually deposited about a foot of wet snow on the area.
The top rail really does slant downward: the tenon on the right end broke and fell out of the mortise.
The DSC-H5 carries the 1.7× teleadapter, zoomed all the way tight through two layers of 1955-ish window glass, hand-held, braced against the pane.
The day before that snowstorm, we biked 18 miles out-and-back over the Walkway in beautiful, sunny, mid-50s (°F) weather:
We ride when we can and shovel when we must!
The lumpy surface of the Michelin Pro-Tek Max tubes now in the back tire of our bikes can’t be patched, which means (being that type of guy) I must carry along a spare tube in addition to a handful of CO2 cartridges. So, having cleaned out my tube stash, I ordered a pair from an Amazon supplier, not my usual bottom-dollar eBay suppliers, clearly described as fitting the Schwalbe Marathon Plus 700x35C tires.
The Amazon listing and the box label agreed, but (being that type of guy) I just had to extract the tube to see what I got:
According to the seller, who speaks and writes English far better than I can handle Mandarin (or whatever):
Yes, you are right, you also didn’t bought wrong items for your tire. we marked the 700×28-32, just for our manufacture to difference from another big size from 700/35-45C, because if we marked the size 700×28-35C, sometimes , the worker will packing 700×35-45c into the packing, and let the tube can not used for the 700x35c customer..
It turns out the tube has
35-38 embossed into the rubber, so it’s not obvious the tube would fit into the smaller
28-32 size tires as labeled. It all depends on what you trust: the mold, the tube’s stamp, the box label, or the advertising.
Next time around, an event I hope (but do not expect) lies far in the future, I’ll spend a bit more for what will undoubtedly be the same tube from the same factory, but from a vendor buying enough QC to ensure the workers know what they’re packing. Having all the labels match would be a definite bonus.
We biked to some errands on an unseasonably warm 4 January and, a few days later, I noticed the rear tire on Mary’s bike was flat. A bit of Quality Shop Time later:
On the upside, I found it in the garage and fixed it in the basement.
The chip emerged from one of two adjacent gashes in the middle of the tread, but hadn’t quite cut through the tire. A somewhat larger chip (that’s a 0.1 inch grid) in the other gash cut through the Schwalbe Marathon’s protective belt to puncture the tube, then fell out.
The rear wheel of her bike now sports a Michelin Pro-Tek Max tube inside a Schwalbe Marathon Plus tire, as does mine. The wheel + tube + tire probably weighs as much as some entire carbon-fiber bikes, but it doesn’t matter.
Searching for the obvious keywords will produce many other instances…