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Re: rear disk brakes
DaveW did pass the time by typing:
> jbjeep wrote: > >>>> Actually, although modern passenger trains tend to use disc brakes in >>>> addition, most railroad equipment I've ever encountered uses neither a >>>> disc or drum. They use a "tread brake", that is a cast iron or composite >>>> brake shoe that is applied to the outside of the wheel, on the running >>>> surface. Iron on steel. Smokes sometimes, doesn't catch on fire! >>>> >> >> >> so what makes all the sparks that sets off the fires out here? we get fires >> all the time in the summer months right along the railroad tracks. had a >> big one last summer in portland - nearly lost some houses because of it. > Kids playing with matches along the tracks ^^^^ that's the #1 cause around here. Most of this area is flatlandia so the trains don't brake so drasticly. I'd suspect areas with steeper grades that wheels/brakes sparking could be a real problem. -- DougW |
Re: rear disk brakes
That is usually caused by the wheel to track joint.
When wheel bearings go on them, they can shoot sparks out the bearing itself or they seize the wheels up causing them to drag along the tracks shooting mega sparks. A brake can seize on causing the same thing too. That is/was one of the big issues when they canceled the conductors in the caboose back in the 80's up here in Canada. These guys actually sat up top watching for stuff like that, now a heat sensor in the train station 'looks' at wheels as they go on by. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's jbjeep wrote: > > >>Actually, although modern passenger trains tend to use disc brakes in > >>addition, most railroad equipment I've ever encountered uses neither a > >>disc or drum. They use a "tread brake", that is a cast iron or composite > >>brake shoe that is applied to the outside of the wheel, on the running > >>surface. Iron on steel. Smokes sometimes, doesn't catch on fire! > >> > > so what makes all the sparks that sets off the fires out here? we get fires all the > time in the summer months right along the railroad tracks. had a big one last summer > in portland - nearly lost some houses because of it. |
Re: rear disk brakes
That is usually caused by the wheel to track joint.
When wheel bearings go on them, they can shoot sparks out the bearing itself or they seize the wheels up causing them to drag along the tracks shooting mega sparks. A brake can seize on causing the same thing too. That is/was one of the big issues when they canceled the conductors in the caboose back in the 80's up here in Canada. These guys actually sat up top watching for stuff like that, now a heat sensor in the train station 'looks' at wheels as they go on by. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's jbjeep wrote: > > >>Actually, although modern passenger trains tend to use disc brakes in > >>addition, most railroad equipment I've ever encountered uses neither a > >>disc or drum. They use a "tread brake", that is a cast iron or composite > >>brake shoe that is applied to the outside of the wheel, on the running > >>surface. Iron on steel. Smokes sometimes, doesn't catch on fire! > >> > > so what makes all the sparks that sets off the fires out here? we get fires all the > time in the summer months right along the railroad tracks. had a big one last summer > in portland - nearly lost some houses because of it. |
Re: rear disk brakes
That is usually caused by the wheel to track joint.
When wheel bearings go on them, they can shoot sparks out the bearing itself or they seize the wheels up causing them to drag along the tracks shooting mega sparks. A brake can seize on causing the same thing too. That is/was one of the big issues when they canceled the conductors in the caboose back in the 80's up here in Canada. These guys actually sat up top watching for stuff like that, now a heat sensor in the train station 'looks' at wheels as they go on by. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's jbjeep wrote: > > >>Actually, although modern passenger trains tend to use disc brakes in > >>addition, most railroad equipment I've ever encountered uses neither a > >>disc or drum. They use a "tread brake", that is a cast iron or composite > >>brake shoe that is applied to the outside of the wheel, on the running > >>surface. Iron on steel. Smokes sometimes, doesn't catch on fire! > >> > > so what makes all the sparks that sets off the fires out here? we get fires all the > time in the summer months right along the railroad tracks. had a big one last summer > in portland - nearly lost some houses because of it. |
Re: rear disk brakes
That is usually caused by the wheel to track joint.
When wheel bearings go on them, they can shoot sparks out the bearing itself or they seize the wheels up causing them to drag along the tracks shooting mega sparks. A brake can seize on causing the same thing too. That is/was one of the big issues when they canceled the conductors in the caboose back in the 80's up here in Canada. These guys actually sat up top watching for stuff like that, now a heat sensor in the train station 'looks' at wheels as they go on by. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's jbjeep wrote: > > >>Actually, although modern passenger trains tend to use disc brakes in > >>addition, most railroad equipment I've ever encountered uses neither a > >>disc or drum. They use a "tread brake", that is a cast iron or composite > >>brake shoe that is applied to the outside of the wheel, on the running > >>surface. Iron on steel. Smokes sometimes, doesn't catch on fire! > >> > > so what makes all the sparks that sets off the fires out here? we get fires all the > time in the summer months right along the railroad tracks. had a big one last summer > in portland - nearly lost some houses because of it. |
Re: rear disk brakes
Well, I suppose they are tread brakes in a sort of way ; they bear on the
side of the wheel ( the y axis ) not the z axis. Perhaps the traditional sort caused flat spots on the wheel which were more difficult to machine out. I'm guessing. -- Dave Milne, Scotland '91 Grand Wagoneer, '99 TJ "L.W. (ßill) ------ III" <----------@cox.net> wrote in message news:40F4EA1A.E5185C1F@cox.net... > Makes me wonder why, when you have a ready made surface. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Dave Milne wrote: > > > > I think disc brakes on trains are comparatively recent ; older stuff here > > does > > use the tread brakes you describe. > > > > Dave Milne, Scotland > > '91 Grand Wagoneer, '99 TJ |
Re: rear disk brakes
Well, I suppose they are tread brakes in a sort of way ; they bear on the
side of the wheel ( the y axis ) not the z axis. Perhaps the traditional sort caused flat spots on the wheel which were more difficult to machine out. I'm guessing. -- Dave Milne, Scotland '91 Grand Wagoneer, '99 TJ "L.W. (ßill) ------ III" <----------@cox.net> wrote in message news:40F4EA1A.E5185C1F@cox.net... > Makes me wonder why, when you have a ready made surface. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Dave Milne wrote: > > > > I think disc brakes on trains are comparatively recent ; older stuff here > > does > > use the tread brakes you describe. > > > > Dave Milne, Scotland > > '91 Grand Wagoneer, '99 TJ |
Re: rear disk brakes
Well, I suppose they are tread brakes in a sort of way ; they bear on the
side of the wheel ( the y axis ) not the z axis. Perhaps the traditional sort caused flat spots on the wheel which were more difficult to machine out. I'm guessing. -- Dave Milne, Scotland '91 Grand Wagoneer, '99 TJ "L.W. (ßill) ------ III" <----------@cox.net> wrote in message news:40F4EA1A.E5185C1F@cox.net... > Makes me wonder why, when you have a ready made surface. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Dave Milne wrote: > > > > I think disc brakes on trains are comparatively recent ; older stuff here > > does > > use the tread brakes you describe. > > > > Dave Milne, Scotland > > '91 Grand Wagoneer, '99 TJ |
Re: rear disk brakes
Well, I suppose they are tread brakes in a sort of way ; they bear on the
side of the wheel ( the y axis ) not the z axis. Perhaps the traditional sort caused flat spots on the wheel which were more difficult to machine out. I'm guessing. -- Dave Milne, Scotland '91 Grand Wagoneer, '99 TJ "L.W. (ßill) ------ III" <----------@cox.net> wrote in message news:40F4EA1A.E5185C1F@cox.net... > Makes me wonder why, when you have a ready made surface. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Dave Milne wrote: > > > > I think disc brakes on trains are comparatively recent ; older stuff here > > does > > use the tread brakes you describe. > > > > Dave Milne, Scotland > > '91 Grand Wagoneer, '99 TJ |
Re: rear disk brakes
I use to have to drive through a yard in Houston littered with
pairs of flat wheels. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ DougW wrote: > > Most of this area is flatlandia so the trains don't brake so drasticly. > I'd suspect areas with steeper grades that wheels/brakes sparking could > be a real problem. > > -- > DougW |
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