HPVS March 2022

hpvs@lists.lysator.liu.se

1 participants
5 discussions

Fwd(4): Re: [hpvs] Ny cykel i sverige
by Jan-Inge Ljungberg 30 Sep '25

30 Sep '25

anderz.naslund(a)eductus.com skriver: KOlla http://www.bentrideronline.com/STP/index.html en bit ner på sidan Cannondale bygger liggcykel Min lokala cykelhandlare har beställt en redan.. Anderz KUL att de "stora" tillverkarna börjar få upp ögonen för recumbents. Tyvärr är 2000 dollar mycket pengar för en i mina ögon rätt så ordinär liggcykel. Den svenska valutan i förhållande till dollarn gör inte detta bättre plus frakten blir det nog ett pris i överkant. Jag skulle vilja tipsa din cykelhandlare om danska tillverkare t.ex Hjordt/Bjällby de har många olika modeller alltifrån höga liggcyklar till semilow och superlow vilka inte är några dumma saker och de finns till beskådande i ett flertal danska cykelaffärer. frakten är låg (nu har vi tom en bro till Danmark!). Danska HPV-bladet listade i senaste numret cykelaffärer som har liggcyklar och det börjar bli en imponerande samling (hör av er till mig om ni vill ha listan). Cyklar som finns är Optima, Challenge Burley, Ostrad, Nöll, Bjällby/Hjordt, Leitra coh fler är på väg. Jan-Inge Ljungberg alternativ email webmaster(a)liggister.org Hemsida http://www.liggister.org

2 1

Ny liggist i Trollhättan-Vänersborg?
by Anders Drougge 16 Sep '25

16 Sep '25

Cyklade hem från Vänersborg i går kväll och mötte strax före Båberg en lowracer i god fart. Trodde först att det var nyblivne Raptobikeägaren Kjell som var ute på en kvällstur, men när lowracern svischade förbi såg jag att det inte var Kjell. Är det någon i gänget som vet mer - någon har kanske sålt en liggcykel till någon i den här trakten? Kanske var det en turist? (Fast den jag mötte hade ingen packning) Det vore ju kul om liggcyklandet kunde bli lite mer allmänt även här! -- Anders D

2 1

Re: [hpvs] LED
by B D 27 Oct '24

27 Oct '24

--- Den mån 2008-10-06 skrev Joakim @ BBB <joakim.barkstrom(a)bredband.net>: > Jag googlade lite och hittade en länk till en som har > startat en liten > databas för led-lights. > Vet inte om det hjälper men det kan vara intressant som > jämförelse. > USA-baserat naturligtvis men allt går ju att beställa > över nätet. > Ljusstyrkan på varje enhet är givetvis med liksom priset > i $. > > http://www.candlepowerforums.com/vb/showthread.php?t=176131 Intressant sida! Jag har just beställt en SCOLO med Li-ion-batteri. Tänker uppgradera lyset och blyacken i Mangon! /Bruno __________________________________________________________ Låna pengar utan säkerhet. Jämför vilkor online hos Kelkoo. http://www.kelkoo.se/c-100390123-lan-utan-sakerhet.html?partnerId=96915014

6 10

None
by None 08 Mar '22

08 Mar '22

pedals are both pulled and pushed. It is just a lot easier to climb a hill that way. I can also say that that my feet tends to last longer if I try not to press on the pedals all the time. By lifting the feet att the return stroke, I can avoid the aching feet I will otherwise have after some time pedalling. This, btw, seems to be a recumbent problem. For mechanical reasons I assume the force pressing the foot to the pedal is actually higher on a recumbent (with a near horizontal leg) than on an upright (I will do some calculations some day). My method to get a smooth round pedalling is to imagine my feet following the pedals, instead of pushing them. Try that, it gives a remarkable relaxed, flying feeling (on my Trice recumbent, at least)! The trouble is to keep this up for a prolonged time, some muscles seems to need training... Sverker

1 0

None
by None 08 Mar '22

08 Mar '22

- My first impression of the Powercranks was a bit flawed. Their main principle is preventing "resting" (pushing if you like) on the pedal in the up-stroke. Learning to use muscles to lift the foot will increase effective power (theoretically). If the power contribution in the up-stroke remains small (but not negative) it will do nothing to smooth the power curve. This might work, but I'm sceptical. By the way: will this work at all on a recumbent? For me they are worthless anyway since I only ride Mountainbikes. - My own reasoning around the possible benefits of Bikedrive has made my so curious that I just might have to try it. I have my power reading Tacx to check with. Too bad about the extra 400g's. Maybe I can give first hand reports this spring ;). Loooong message. Sorry about that ;) /Dick ----- Original Message ----- From: "Frederik Van De Walle" <frederixie(a)hotmail.com> To: <hpvs(a)lists.lysator.liu.se> Sent: Tuesday, October 22, 2002 5:18 PM Subject: [hpvs] Re: Vevarmar -->pedalling technique > > Richard Vizins wrote: > > >My main objection is that there is (as far as I know) very little evidence > >that even the most skilled proffesional cyclists use more than a small part > >of the down-stroke to produce power. > > I disagree :-) I am pretty much convinced that if that was really the case, > it would be a very bouncy ride!* ;-) Also I know of a clear example where > two brothers were doing the final sprint for a race (on lowracers) The one > that had the better technique won very easily from his brother, although > they had been racing together the whole race. The catch is, he won using ONE > leg!! And the next year, when the other brother improved his technique, he > couldn't even beat him anymore using both.... (I'm sure there are some other > factors in play here, but still...) > > >It was this knowledge(from experiments) that initiated Shimanos ill-fated > >BioPace project. > >BikeDrive for instance is just another try at the same thing but with a > different approach. Powercranks are very different visually, but really > >also adress the same problem. By preventing the cyclist from lifting > >his up-stroke foot with his down-stroke foot it prevents forces in the > >wrong direction, thus smoothing the power over the pedal cycle. > >BikeDrive does the same thing but by storing energy. > > I agree and I disagree. The explenation of powercranks is right, but I think > Bikedrive and Powercranks are completely different issues. Bikedrive in no > way punishes wrong pedalling technique as powercranks do! Maybe even to the > contrary.... > > >Powercranks develops new muscles, > I think that you can actually learn to pull pretty hard on pedals too. > During continuous riding, I can keep up the same power only pulling the > pedals and relaxing during the push, for quite some time. Sprinting and > climbing capacity improve a lot when I have clipless pedals so I can really > pull.... > > >Bikedrive doesn't require a lot of training and adaptation - which is best? > > Well, as I said before, I don't think very highly of bikedrive and I would > like to try out a powercrank, but I wouldn't actually buy it. Yet. I would > need to try it first, it's the law of stubborness ;-) > > >Do any of them make a difference? > > Even if there is scinetific 'proof', for me it does not guarantee it works > for you, as I believe there is room for a lot of different pedalling > techniques for different people. So I say, try it!!! > If you buy it, you can always sell it... maybe to see how many people want > to get rid of theirs is a better indication if it works ;-) > > Cheerio, frederik > > > *a bouncy ride: a simple calculation: > > Let's say we assume 'one-hour record' power: 500W @ 110 rpm equals a torque > of (500 * 9,54 / 110)= 43Nm average. For one leg this means 21,5 Nm. If only > during one fourth of the pedal stroke there is effective torque > (downstroke), then the torque should be 21,5 Nm x 4 = 86Nm. With a crank > length of 0,17m this means an upwardds force of (86Nm/0,17m)=506N or for > normal gravity 51,56 kg! So if the assumptions made here were true, the > rider has to withstand blows of 50 kg, 220 times per minute!! To me it is > clear no such forces exist, because in any aerodynamic position and > certainly Boardman's 'superman' position, these forces would be unbearable. > Of course very simplistic calc, but there should be some truth in it. > > _________________________________________________________________ > Unlimited Internet access for only $21.95/month. Try MSN! > http://resourcecenter.msn.com/access/plans/2monthsfree.asp > > _______________________________________________ > HPVS mailing list > HPVS(a)lists.lysator.liu.se > http://lists.lysator.liu.se/mailman/listinfo/hpvs

1 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

HPVS March 2022