home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: rec.autos.tech
- Path: sparky!uunet!spool.mu.edu!sdd.hp.com!cs.utexas.edu!torn!newshost.uwo.ca!valve.heart.rri.uwo.ca!wlsmith
- From: wlsmith@valve.heart.rri.uwo.ca (Wayne Smith)
- Subject: Re: disc braks again
- Organization: The John P. Robarts Research Institute, London, Ontario
- Date: Fri, 11 Sep 1992 02:05:50 GMT
- Message-ID: <1992Sep11.020550.28190@julian.uwo.ca>
- Keywords: discs vs drums
- References: <1992Sep10.224850.10150@bohra.cpg.oz.au>
- Sender: news@julian.uwo.ca (USENET News System)
- Nntp-Posting-Host: valve.heart.rri.uwo.ca
- Lines: 30
-
- In article <1992Sep10.224850.10150@bohra.cpg.oz.au> jrp@bohra.cpg.oz.au (John Pitman) writes:
- >Hi there,
- Hello. I guess it's about time this stuff went into .tech.
-
- >no amount of pumping will get the shoe to stay in contact and do useful work.
- >I dont think you will find a drum brake much bigger than 11" anywhere - that
- >was the biggest ROLLS get before they went discs, and they were stopping a lot
- >of iron ! as others noted, it is easier for discs to lose heat than shrouded
-
- I don't know about ford or GM, but 60's Chryslers had 11" drums as well.
-
- >and the caliper is very simple - the seals are just square section rubber,
- >compared to the seals inside drum cylinders.
- Which are plastic cups, which push against aluminum pistons, which push
- against 1 or 2" long aluminum (I think) rods (1/4" diam), which then
- make contact with the steel rib which attaches to the shoe backing plate.
- The direct heat path to the fluid is next to nill.
-
- >BTW why do the poms tend
- >to stick with solid disc rotors, and others go vented???
- What's a pom?
-
- And while we're still on this topic :)
-
- -> what do planes, trains, semi-trucks (ie MAC trucks/16 wheelers/tractor-
- trailers) use for brakes?
-
-
-
-
-