I reckon my 'home made' "Bamboo" trailer (actually pine but never mind) might manage a washing machine. I've had some pretty hefty loads on it. It can carry a full grown adult so I imagine it'll manage a washing machine too.
CityCyclingEdinburgh Forum » Events, rides etc.
The Ridiculous Reekie Roll (aka Castle to Docks without pedalling)
(80 posts)-
Posted 12 years ago #
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Which full grown adult are we talking about? The lightest human adult reliably recorded was 5.5kg, the heaviest is unmeasured since they couldn't find a scale that ranged to over 500kg.
Posted 12 years ago # -
A woman of around 5'6" in height. Not sure what her weight was: not polite to ask these questions of a lady!
Posted 12 years ago # -
Found this
The empty road part put me in mind of this thread - any further forward?
Not that I'll be joining in, as it's way before my very earliest getting up time, just curious.
Posted 12 years ago # -
More resurrection of ideas.
Saturday 1st September. 4 or 5am? Coffee and brekkie at Leith...
Posted 12 years ago # -
The Noomad would be good as you could slow to an absolute crawl/stop where required without risk of tipping over (although WC can trackstand so point might be moot).
Posted 12 years ago # -
No takers? I'm up for this, and am happy to weight the odds in my favour by recruiting ballast. Anyone want to sit on the front of the Pino?
Robert
Posted 12 years ago # -
I can see how you might go a fair way if you can get an uninterrupted run from Castle Hill, but surely Leith is pretty flat? Which route would give enough momentum to get all the way to the docks? I reckon you'd only make it as far as the Kirkgate before running out of steam. Henderson street has a wee bit of a slope on it but would it be possible to get that far?
Posted 12 years ago # -
Going down Leith Walk (the only truly sensible way north for this, if sensible is a word that can be applied to the venture at all) then Henderson Street is probably a bit too far along Gt Junction Street to maintain the speed from the slope.
Theory is, if the lights are with us down Leith Walk then there could/should be enough momentum to get onto Constitution Street - which itself has a very very slight slope. Carry enough momentum there and you should maintain it to Bernard Street - and I think that would count as making it all the way.
All theory of course.
Posted 12 years ago # -
That certainly sounds like the best route to go. What an awesome idea. i know I don't really know any of you guys but would love to do this. Load up the panniers to the max.
Posted 12 years ago # -
Does having extra weight to increase downhill kinetic energy overcome the requirement for potential energy to get you up a hill? Does it also increase rolling resistance to a point where the benefit becomes less than the negative?
All questions that someone (nae me) should be working out here!
Posted 12 years ago # -
Gravity is pretty much perfectly efficient, so the kinetic/potential transfer falls out the equations.
Kinetic friction broadly comes out as linear, so that falls out too.
We're left with air resistance, which I've read but not confirmed as becoming the main source of loss above 12mph unless your bike is a rusting holk.
A pannier loaded with as much lead shot as your rack can bear has exactly the same aerodynamic properties as a pannier filled with the naive dreams of first love, but the planet tugs you harder if you're carrying the grizzly-killing balls of Pb, so at any given point above 12mph, the dense cyclist is winning.
I expect a trailer loaded with 90kg of whatever metal I can beg, borrow or steal will likewise comfortably outstrip the Carryfreedom's less than Gigeresque aero styling, but we shall see.
Posted 12 years ago # -
however a pannier that isn't there at all has significantly less air resistance than a pannier that is there...
And does a tyre with 40kg extra of weight on it from panniers have more rolling resistance on the road?
Posted 12 years ago # -
That explains why big guys come past me on downhill but I catch them ( in my head) on the uphill
Posted 12 years ago # -
Gut instinct is telling me that a pannier pair, already in the slipstream of the rider's legs and a slicker shape than a bike+human anyway, can't add more to drag than they can to mass.
But guts are for digestion, so let the experiments begin...
Posted 12 years ago # -
I'm all about empirical observation. Let's roll.
Posted 12 years ago # -
Whilst rewriting a telephony report this afternoon my mind kept wandering to wondering how best to modify a wheel so that a set of weights could be added whose distance from the hub could be controlled. You wouldn't be able to store angular momentum as such but would be able to adjust the balance between Newtons and metres, shifting the weights towards the rim to effect a slower roll whilst not losing energy, enabling slow creeping whilst waiting for a light to go green, but then being able to accelerate slightly without having to pedal by bringing the weights back in towards the hub.
Whilst the legally important thing at traffic lights is to not cross a stop line when the light is red (or when it's turned amber if you can stop safely) as Min noted on another thread today it's often the getting-across-before-other-things-get-a-green-light-to-get-across-in-another-direction which is the worry, though it hopefully won't be an issue so early in the morning.
Posted 12 years ago # -
*bump*
Still Saturday?
Posted 12 years ago # -
Yeah why not! Preference is 5AM vs. 4AM though!
Posted 12 years ago # -
If Laid Back turns up at still dark o'clock with a borrowed Milan velomobile, everyone else may as well go back to bed. :) It'd probably get all the way to Portobello.
Posted 12 years ago # -
I had avoided bumping this as I can't do this weekend.
Posted 12 years ago # -
I'm gonna stop promoting this and someone else can take over - been invited to a birthday shindig for my sister's birthday in the Borders. Not something I can get out of (not that I want to you understand, just that it's annoying - but let us know how you get on!).
Posted 12 years ago # -
Good luck guys :P
@wingpig: I like the idea... but actually thinking about it...: Assume the weight in the wheels that you're moving is (say) 10% of the whole weight of you + bike. At the rim this weight will be going as fast as you. So will have a proportional amount of energy (i.e. 1/10th). Sadly, because KE is proportional to v^2, when you give the weight this energy (from your forward velocity), it will only slow you down by about 5%...
To make this work a geared momentum wheel within your bike wheels might do the job? To store enough to get you to 10m/s, if it weighs 10% of you+bike, you'd need it to spin to about 1000rpm. Annoying gyro-effects could be cancelled by ensuring there are two wheels inside each wheel (rotating in opposite directions). I've no idea how the gearing etc could work :/
I'd prefer it more for getting up hills, but at 1000rpm it'll only help get me up 16 feet of hill, then I've got to lug 10kg of pointless weight around with me...
10,000rpm would be more effective (160feet of hill) but air resistance and the noise of something with a edge speed of 185mph is not going to work (and would present a considerable health hazard)... back to the drawing board (or work!).Posted 12 years ago # -
@lionfish Just a little kick just to slightly speed you up if you had trickled to an almost-stop on a nearly flat bit of ground at a red light might be enough. Flywheels seemed too fiddly but sliding weights could conceivably be somehow wangled onto a radially-spoked wheel without too much modification (apart from the slight problem of some sort of linkage to move the weights in and out whilst allowing the wheel to spin).
Posted 12 years ago # -
Cyclopedia lists a 1978 Sabliere which had centrifugal weights built into the back wheel. These would move outwards with increased speed to counteract side winds hitting the wheel.
One of these although it's not clear from that that the weights move automatically.
Posted 12 years ago # -
Sorry guys, Pino is off the road (rebuilding the front wheel), and a lack of stoker volunteers suggests that tomorrow is off for it.
A lack of sleep earlier this week suggests tomorrow is also off for me - I hope to be unconscious this time.
In my defense I did try to get the traffic light phasing changed so that you could ride a green wave...
Robert
Posted 12 years ago # -
I've been too busy to arrange any suitable loads for the trailer, so unless someone happens to have 85kg of dense material lying about that I can collect tonight, I'll sit this one out for another weekend.
Posted 12 years ago # -
@uberuce, I am a tad over 85k, but dense? Leave you to decide ;-)
Posted 12 years ago # -
Would you not be better doing it on a weekday, say Monday/Tuesday?
1. No drunken clubbers/revellers sprawled/crawling/drifting across the street.
2. Not so much in the way of broken glass/vomit/beer cans/items of clothing left in the road by the above.
3. Festival over (including the Mela which kicks off tonight in Leith) so quieter all around.
On the other hand:
Z:- School/work/getting up shortly afterwards.
Posted 12 years ago # -
The Sunday night before a Monday holiday? There is one coming up, for schools anyway
Posted 12 years ago #
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