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#21
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Cherokee 180 soft brake - causes?
"David Lesher" wrote in message ... "Dave Stadt" writes: That's not exactly what could happen in a brake circuit. We are talking brake circuits not crankcase. Leave oil exposed to the atmosphere and it does not absorb air. Nope, just water..... but in any case the key issue is having a fluid that has very low compressibility even at high temperatures. (Look at the NOVA series on the 777; the rejected-takeoff test has the solid carbon rotors glowiing bright orange as the rims melt...now THAT'S hot....). Even a small amount of suspended air makes it compressable. And oil, unlike brake fluid, does not err ?stratify? well. Automotive brake fluid was, ISTM, the very first federal automotive safety standard. It must have: Traditional automotive brake fluid is alcohol based and is hydroscopic. A can will become useless in a matter of hours if not tightly capped. It is not oil based. Ahem.. it's not alcohol-based; it's glycol based. (Except DOT-5 which is silicon..) Ahem..glycol is.....well why don't you look it up. |
#22
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Cherokee 180 soft brake - causes?
"Dave Stadt" writes:
Ahem.. it's not alcohol-based; it's glycol based. (Except DOT-5 which is silicon..) Ahem..glycol is.....well why don't you look it up. Could be, I'm no chemist (and got a C in the subject to prove it...). But everything I've read on it describes it as glycol. The other one most of us think of is anti-freeze. Time was, that was alcohol...well, it used to be it evaporated regularly. To solve that {and corrostion issues...} Ethylene glycol as "permanent antifreeze" came on the scene in the 1950's/60's. If that's an alcohol, then I've learned something new. It sure doesn't burn like one... -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
#23
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Cherokee 180 soft brake - causes?
David Lesher wrote:
"Dave Stadt" writes: Ahem.. it's not alcohol-based; it's glycol based. (Except DOT-5 which is silicon..) Ahem..glycol is.....well why don't you look it up. Could be, I'm no chemist (and got a C in the subject to prove it...). But everything I've read on it describes it as glycol. The other one most of us think of is anti-freeze. Time was, that was alcohol...well, it used to be it evaporated regularly. To solve that {and corrostion issues...} Ethylene glycol as "permanent antifreeze" came on the scene in the 1950's/60's. If that's an alcohol, then I've learned something new. It sure doesn't burn like one... A hint: glycols are two-valued alcohols (two hydroxyl groups). -- Tauno Voipio tauno voipio (at) iki fi |
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