Archive for category Recumbent Bicycling
Unlike the Samsung cards, Sandisk charges a substantial premium for not buying through Amazon.
rsync -rtv /mnt/Fly6/ /mnt/part
“High Endurance” means it’s rated for 5000 hours of “Full HD” recording, which they think occurs at 26 Mb/s. The Fly6 records video in 10 minutes chunks, each weighing about 500 MB, call it 1 MB/s = 8 Mb/s, a third of their nominal pace. One might reasonably expect this card to outlive the camera.
As with the AS30V, we shall see …
The Fly6 rear camera on my bike started giving off three long beeps and shutting down. Doing the reformatting / rebooting dance provides only temporary relief, so I think the card has failed:
The Fly6 can handle cards up to only 32 GB, which means I should stock up before they go the way of the 8 GB card shipped with the camera a few years ago.
Some back of the envelope calculations:
- It’s been in use for the last 19 months
- The last 22 trips racked up 88 GB of video data = 4 GB/trip
- They occurred over the last 6 weeks = 3.6 rides/week
- Call it 250 trips = 1 TB of data written to the card = 32 × capacity
That’s only slightly more than the failure point of the Sony 64 GB MicroSDXC cards. The Fly6 writes about a third of the data per trip, so the card lasts longer on a calendar basis.
So now let’s find out how long the Samsung cards last …
T=0: You can’t tell, but the signals for Hooker Avenue have been yellow for several seconds and are about to turn red:
T+3: The opposing signals have been red for a while, but nobody much cares about that:
T+11: Right-turning traffic (with a green arrow) blocks his path, so he just drops to a dead stop in the middle of the intersection:
T+14: Finally! All clear for a left on red:
When a cyclist delays a driver for two, maybe three, seconds, even while riding legally, outrage occurs.
And, yeah, I’ve made mistakes, too. Happens to everybody. Cyclists seem to arouse disproportionate outrage, so I try very hard to ride within the rules and the lines.
Over the course of a few weeks, both of the indicators in the SRAM grip shifters on my bike snapped off. Having recently touched my parallel jaw clamp assortment, it occurred to me I could mold snippets of polypropylene sheet (saved from random clamshell packages for just such a purpose) around the nose of a clamp and come out pretty close to the final shape:
A hot air gun set on LOW and held a foot away softened the polypro enough so a gloved thumb could squash it against the jaw. Too much heat shrinks the sheet into a blob, too little heat lets the sheet spring back to its original shape.
The flat tab of the original indicator is about 1 mm thick. I found a package of 47 mil = 1.2 mm sheet with one nice right-angle bend and ran with it.
Because I expect sunlight will fade any color other than black, that’s the Sharpie I applied.
They don’t look as awful as you might expect. The rear shifter, minus the cover:
The front shifter, with cover installed and HT PTT button below the still-good Kapton tape:
The transparent covers press the OEM indicators down and do the same for my homebrew tabs. I expect the Sharpie will wear quickly at those contact points; next time, I should tint the other side.
They’re rather subtle, I’ll grant you that.
Now, to see if they survive long enough to make the worry about a brighter color fading away a real problem…
Mary doesn’t like wearing the wrap-around-her-head earpieces found on sunglasses these days under her bicycle helmet, so I must trim them to fit:
Perhaps I won’t need an old pair to prepare the next set: a scant four inches from the hinge.
As usual, we’re at the Rt 55 end of Burnett Blvd, returning home from a grocery trip; I’m hauling two full bags of chow in the trailer. The white car pulling up immediately to our left will make a left turn from the left lane:
The more distant white car, turning left out of Overocker, is eases past us in the right lane to make a right turn:
We’re on the left side of the right lane, rather than the right, to avoid right hook collisions with drivers who flat-out do not stop before turning. Been there, had that happen, we know better.
The car approaching in the right lane will attempt to pass us on the right:
That’s happened before, too, so I’m watching this happen in my mirror. My line will pass to the right of the inconveniently placed manhole cover in the intersection:
Mary’s nearing the right side of the lane, I’m in the middle, and the driver jams to a stop rather than run up over the sidewalk:
The passenger window is rolling down, which is always a Bad Sign:
It’s all the way down and I know what’s about to happen:
So I preempt the discussion by pointing out she was passing in an intersection and the license plate on the silver Chevy say FEX-4194:
She passes Mary and stops directly ahead of us in the middle of the right-hand lane. We jam to a stop behind her. The black car approaching us swerves into the middle lane:
She pulls around the corner onto Manchester and stops in the intersection. I stop well behind her to remain visible from Rt 55, which turns out to be a Good Idea:
Mary eases beside the drivers window, which rolls down. The driver says she’s going to call the police, “because we pulled directly in front of her”. Mary points out we have video of the entire encounter. The window rolls up and the driver pulls away.
Overocker, Burnett, and a short sprint on Rt 55 to Manchester is the only route from the grocery store to Rt 376 and home, so it’s not like we’re looking for trouble.
No helmet camera video, alas, because I tried those piece-of-crap Wasabi batteries in the Sony HDR-AS30V and the second one was flat-out dead. The first one, in the camera when I left home, showed empty after the half-hour ride to the grocery store, so they really are junk; “Premium Japanese cells” my foot.
The headset on my Tour Easy ‘bent worked its way loose, which led to a disturbing discovery: the headset wrench I made from a discarded flat wrench vanished with the shop tools donated to MakerSmiths.
Fortunately, we live in the future:
A thin plastic wrench is absolutely no good for torquing down the locknut, but that’s not what it’s for. Adjust the bearing race to the proper preload with this wrench, hold it in place, then torque the locknut with the BFW.
The OpenSCAD source code as a GitHub Gist:
Now, I’d like to say that was easy, but in actual point of fact …
First, I forgot to divide by cos(180/6) to convert the across-the-flats size to the diameter of OpenSCAD’s circumscribed hexagon-as-circle, which made the wrench uselessly small:
If you have a 28 mm nut with low torque requirements, though, I’ve got your back.
While I had the hood up, I slenderized the handle into a much shapelier figure:
Trotting off to the garage with a warm plastic wrench in hand, I discovered the blindingly obvious fact that the headset nuts have eight sides. On the upside, the number of sides became a parameter, so, should you happen to need a five-sided wrench (perhaps on Mars), you can have one.
So, yeah, it’s rapid prototyping in full effect:
Remember, kids, never design while distracted …