Recent content by ezskater

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    What causes an increase in water velocity when narrowing the outlet of a hose?

    Look at energy. If water escapes, the fluid level in the deposit goes down. I.e. we gain potential energy, water that was previously at fluid level is now down at the level of the hole or hose exit. This energy is (partially) converted to kinetic energy. In particular, if there is no energy loss...
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    Heat dissipation from a brake pad

    Hi Q Goest missing your inputs! Have you read the memo? I added some lines yesterday. I start to see a basic difference between the bicycle rim and the inline skate heel brake. The heated layer (of rim or road) is pretty thin - in case of the road around 1/10 mm, in case of the rim it is...
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    Heat dissipation from a brake pad

    Hi, I did some more investigation of how the heat distributes into the road. This turns out to be classical one-dimensional heat conduction theory. See http://www.ezskate.de/brake_pad.doc and http://www.ezskate.de/brake_pad.xlr. Temperature increase on the road surface is moderate (about 12...
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    Heat dissipation from a brake pad

    Q_Goest, after thinking about your answer, I guess it would be pretty naive to assume that intitially heat is distributed 50:50 between pad and road. I can easily imagine effects that transfer much more heat into the pad (as the softer part) than into the road. Like vibrations and erosion...
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    Heat dissipation from a brake pad

    Yes, sure the rim gets hot. But does the brake pad itself get HOTTER than the rim? And by how much? (In the case of a skate braked by a friction heel brake, rim ==> road. So the difference is that the rim comes back to your pad with every revolution of the wheel, while the road doesn't. You...
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    Heat dissipation from a brake pad

    Many thanks. A lot of good points! I'm now out for 3 weeks summer vacation. Will do some practical experiments! If anything useful comes out, I tell you. Hanno
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    Heat Due to Friction In Brake Pads

    It's me again ... I just opened a new thread in the General Engineering Section to further discuss this. I think my problem has not so much to do with Materials and Chemical. So if you're interested in what I brought up, please go to the General Engineering Section. Hanno
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    Heat dissipation from a brake pad

    Hi all, (this has originally been in the Materials and Chemical Section. I think it does not belong there). I'd like to add a question heat dissipation from a brake bad. Basically, let's assume a brake pad is pressed against a surface that quickly moves along (can be the bicycle brake pad...
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    Heat Due to Friction In Brake Pads

    Hi all, I'd like to add a question re the "skidding" case. Basically, let's assume a brake pad is pressed against a surface that quickly moves along (can be the brake pad on the rim or, in the case of an inline skate with a heel brake, a brake pad and the road itself). Let's look at a...
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