tryallmaster Posted August 4, 2009 Author Report Share Posted August 4, 2009 Air runs out when changing a gear to go uphill....bugger! Quote Link to comment Share on other sites More sharing options...
psycholist Posted August 4, 2009 Report Share Posted August 4, 2009 Pneumatic braking is unworkable for bikes - Car brakes are also fully hydraulic though the braking is assisted by pneumatic pressure/vacuum. Because air is compressible there will be no easy proportionate link between pulling the lever and the braking force and a compressor would be needed to continuously maintain air pressure. Cars get around this by using the flow of air being sucked into the engine to create a vacuum.In trials the braking problem is coming up with a brake with bite and hold that will also offer modulation and not cause the user permanent hearing damage... Disks are the closest to offering this, but they seem very sensitive to contamination and some can be surprisingly variable from day to day for no good reason... Quote Link to comment Share on other sites More sharing options...
Bearded Midget Posted August 4, 2009 Report Share Posted August 4, 2009 ive only had 2 punctures in the last year or so, but for the street bashers they should make a rim/tube/tyre system thats way more puncture resistant. a product that the company will garantuee will last so long.. and not a garantuee that in the small print it says you have to run 35psi if they dont come up with an idea like this, then i suggest bashers put some air in their tyres! it actually annoys me seeing people rimming out on flat ground Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 4, 2009 Report Share Posted August 4, 2009 ive only had 2 punctures in the last year or so, but for the street bashers they should make a rim/tube/tyre system thats way more puncture resistant. a product that the company will garantuee will last so long.. and not a garantuee that in the small print it says you have to run 35psi Quote Link to comment Share on other sites More sharing options...
Revolver Posted August 4, 2009 Report Share Posted August 4, 2009 If anyone wanted to know, it's THE eliminator rim. I think so, anyway. Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 4, 2009 Report Share Posted August 4, 2009 It is indeed! Quote Link to comment Share on other sites More sharing options...
Adrian Posted August 4, 2009 Report Share Posted August 4, 2009 how about a maggy which is only hydraulic at the calliper end, which has basically a lil piston which when the cable tugs on it pushes liquid into the callipers.... thus the ability to run any old lever and cable and not worry about leakage and stuff at the lever and also would be alot easier to keep air out as only this piston the callipers and the cross over are there Quote Link to comment Share on other sites More sharing options...
Revolver Posted August 4, 2009 Report Share Posted August 4, 2009 Possible... it wouldn't be as straight forward as that though, cause cables pulls whereas hydro levers push... Quote Link to comment Share on other sites More sharing options...
N.Wood Posted August 4, 2009 Report Share Posted August 4, 2009 RockShox disks used to be semi hydraulic I seem to remember. Quote Link to comment Share on other sites More sharing options...
Adrian Posted August 4, 2009 Report Share Posted August 4, 2009 quick crappy sketch to show what i meandoes that make sense? Quote Link to comment Share on other sites More sharing options...
Revolver Posted August 4, 2009 Report Share Posted August 4, 2009 (edited) I would've gone for something circular... f**k sketches.I had a better idea... basically... you know how a disc brake works? It turns rotational movement into linear movement. So... if you use the same idea, but make what would've been a pad be part of a piston, it would squeeze fluid out. That was the principle of the original idea, but then I thought, why stop there... why not have that integrated into one slave piston, squeezing the fluid top push out one pad, whilst also moving to a crossover and operating another piston. This second piston could be a standard magura pistonHowever...What if you used a straddle cable and had two of the first pistons?What if... you had no fluid, simply what would effectively be a straddle cable, and two separate sides of a disc brake caliper? They could be sized to fit magura mounts and built to take magura pads... just be cable operated.You heard it here first! If anyone makes this, it's my idea.. I want royalties Edited August 4, 2009 by Revolver Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted August 5, 2009 Report Share Posted August 5, 2009 You heard it here first! If anyone makes this, it's my idea.. I want royalties I have absolutely no idea what you're talking about. Sounds like a magura and a v-brake with magura pads to me... Quote Link to comment Share on other sites More sharing options...
Adrian Posted August 5, 2009 Report Share Posted August 5, 2009 I would've gone for something circular... f**k sketches.I had a better idea... basically... you know how a disc brake works? It turns rotational movement into linear movement. So... if you use the same idea, but make what would've been a pad be part of a piston, it would squeeze fluid out. That was the principle of the original idea, but then I thought, why stop there... why not have that integrated into one slave piston, squeezing the fluid top push out one pad, whilst also moving to a crossover and operating another piston. This second piston could be a standard magura pistonHowever...What if you used a straddle cable and had two of the first pistons?What if... you had no fluid, simply what would effectively be a straddle cable, and two separate sides of a disc brake caliper? They could be sized to fit magura mounts and built to take magura pads... just be cable operated.You heard it here first! If anyone makes this, it's my idea.. I want royalties haha i also thought about this, but the thing is... if you take a bb7 for example look how much you pull the brake for such little pad movement.... you need alot of leverage from where the cable pulls to where the lever bits actually make the pad push in, a system like that would be so hard to make maura size and reliable and strong, its just impractical, youd cath you feet on it also. and yea you could make a similar thing that pushes a piston but it would have to be a very wide piston to get as much fluid out and im not sure if it be powerfull enough them as its having to move two pistons twice as far each compare to how far they move a disk pad to get that much power....with my system you get as much power as you can pull, exactly the same as how a maggy is now, and you wont need to buy a whole new set of callipers and shit, just one, or two of these things (could also use a straddle cable) and your away! if you were to buy just callipers and a cross over new and one of these thing then it wouldnt cost anymore then a standard maggy either haha Quote Link to comment Share on other sites More sharing options...
Revolver Posted August 5, 2009 Report Share Posted August 5, 2009 Thing about yours, it would have to be bigger than it is, I reckon.And also... concerning the pad movement from BB7s... if you changed the internals, it would change the rate of pad movement. If it works on something like screw thread (a bit like a chris king, even) then if you change the pitch (is that right?) of the thread it will travel more...I think the important thing would be to not have to change any of the mounts or add anything to the frame. If you had a straddle cable, you'd need an extra cable guide like on a BMX. I do think someone (me, if I had the knowhow) should try a cable-pull HS33 Quote Link to comment Share on other sites More sharing options...
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