Friction - Wikipedia, the free encyclopediaFriction is the force resisting the relative motion of solid surfaces, fluid layers, and/or material elements sliding against each other. There are several types of friction.
Dry friction resists relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction between non-moving surfaces, and kinetic friction between moving surfaces.
Fluid friction describes the friction between layers within a viscous fluid that are moving relative to each other.
Gonna start on the stone rollers right away. Waiting for another pillowblock. I'm gonna pull out the existing 3/4 shaft and turn and thread it to 5/8 far enough on the undriven end to screw on the stone and secure it with locknuts. then I will turn the shaft to use a 1/2" pillowblock on the end.Whats up with the stone rollers Wayne?
Heh, the beat goes on, tinkering is fun but the only real answer is don't ride in the rain. Friction like all laws of thermodynamics is a zero sum game. Drilling, slotting, grooving only serves to reduce the contact area, providing less friction. Unless a viscous hydraulic fluid with stiction properties, unlike water, is employed like that used in a Nuvinci hub or transmission, any wetting only reduces friction.
Friction - Wikipedia, the free encyclopedia
After the second rebuttle,I re-read the Sheldon Brown tire thingy and the tires you state above with a grit roller would be about what he said about smoothe tires and regular pavement is not really smoothe but a multitude of small irregular grip marks,good grip between them,(except paint lines and steel plates,etc) I still wunder about groves around the roller insted of accross itThe best tire (in my experience) on an FD are the original Velosolex tires made by Michelin They are long wearing, with a deep set of two groves for water dispersal I assume. As far as I know these are one of the few if not only purpose built tires for FD. They last quite a long time especially being driven by a grit type roller. They are not especially wide, and I doubt the contact area of the tread is more than an inch, but it does make a smooth surface, seperated by the grooves. The problem with common FDs is they are forced to be used with standard bike tires. Who knows what they are made of compound wise. I can tell you by what comes on the cheaper imported bikes they are made to no standards, not even round! So all that said, it a crap shoot of sorts as to what we get tire wise, which are just as important as the roller.
I think the link to the Hungarian version was discussed in the Hongdu/Solex thread as being old. I believe the conclusion is they are not in production there anymore, but now are assembled in France from "international" parts. Yep China is included. I guess we can start a thread, a lot of people either have, or had had em. Might be interestingI think it is that most Americans today are somewhat ignorant of motor bicycles and mopeds, and think it is kind of new in America. Do we have a Velosolex thread to move to? I think they are a successful venture like you said.
Velosolex now in new production in Hungary ("modified from the original only as necessary to meet new legislation")
VeloSolex is back
I saw some new ones in USA (online shopping) and I think they were around $1000 !