Hacks / Bodges

10 from me. I would like to see it incorporated into the thread title if possible.

Sounds like a whole other website...

Whatever happened to BMEzine?

Died as most all forums did…

Folks weren't taking that to Facebook...

'Come join my Hacks & Bodges to Your Dick group!'

More of a reddit thing…

Totally structural hot hobby glue grade hi viz hack

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Speaking as someone with form for being a prick: WAC.

Don’t be so hard on yourself

How is this a hack? What was the triangle used for before?

Added webbing + cam buckle to loop into redundant ICS mount on saddle.

(Blue one with elastic is how they ship, which is a faff)

One of my little sheds has a bottom bolt that's annoying as fuck to bend down to lift when you want to open or close the second door.

Tied some builders string to it, threaded through an eye, and wrapped around a stick at the top.

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This is a thinking man’s hack. If the string is too stretchy, I reckon a wire coat hanger might be long enough when unfolded 👍

Sounds like a good mk2 version. I have another of these mini sheds so may test it out there.

If the string is too stretchy

I have a spool of Kevlar twine I bought off eBay years ago... Wasn't expensive and comes in handy now and then.

The original purpose was for a DIY electronic shifting setup I was working on, to wrap around servo-mounted spools and run through short lengths of housing to the derailers in place of normal cables.

That much of the idea seemed to be a goer, but the whole point of the project was to enable a half-step triple (38/52/53) - I'd established it could all fit on a double crank with the two big rings really close together and the small ring only slightly inboard of standard... It looked like a winner.

But of course it required a bespoke FD cage and double big ring (the proof of concept setup I did was too flexy and obviously lacked shift-assist cutouts and ramps). Would've been nice though; that chainring combo turns the upwardly-curving line of gear ratio vs gear number into a nearly straight line.

too flexy

Add structural glue

How many sticks does your bunghole take then?

the whole point of the project was to enable a half-step triple (38/52/53)

...Why?

You probably wouldn't understand if you're not one of those folks into close ratios, but here's the deal - the physical limitations of a derailer drivetrain (few rings, many cogs) impose a suboptimal situation regarding the gaps between gears.

Everyone is familiar with the way cassette tooth counts are spaced - with gaps of say, 4t, 3t, 2t, 2t, 1t, 1t, 1t, etc. If you plot the resulting ratios, you find that once you're down to 1t gaps, the gaps between ratios widen as you go faster, which is the opposite of desirable, given that air resistance is proportional to speed cubed.

My half-step concept halfway fixes this, making the gaps pretty close to consistent. Of course, nobody would ever bother to shift this manually, but it might be worthwhile if an electronic system could take care of it. I had an Arduino programmed to control a couple of servos to suit, but there was no way to ascertain the viability of it without CAD-optimised front shifting.

The two big rings could be spaced about 6mm apart, and perhaps timed shifts with the aid of a crank position sensor could be smooth and reliable enough for it to be a goer, although timed shifts could only happen once per rev given the 1t ring difference.

This is very strange talk on a fixed and single speed forum...

😂^

Isn't that kind of what Pinions do ?

You may not have noticed, but something like 98% of the chat here is unrelated to fgss

But its in our souls and shifting up less than 2% is unacceptable. #shutuplegs #mylegsaremygears.

The idea was to address a shortcoming of derailer drivetrains, in order to maximise their unmatched efficiency.

If efficiency (and weight, for that matter) wasn't a prime consideration, if it was only just about maintaining a nice cadence, the project would've been modifying some Ergolevers to shift a NuVinci.