Templot Club Archive 2007-2020
|
|||
| author | remove search highlighting | ||
|---|---|---|---|
|
posted: 16 Feb 2016 18:39 from: Martin Wynne
click the date to link to this post click member name to view archived images |
This recent RAIB accident report contains some interesting track details about 2-level baseplates: http://www.gov.uk/government/uploads/system/uploads/attachment_data/file/490855/R012016_160111_Washwood_Heath.pdf See paragraphs 56-57, and 101-122. If even RAIB is now referring to a turnout as a "point", I fear we must declare the battle lost.  Martin. |
||
|
posted: 18 Feb 2016 03:27 from: Andrew Barrowman
click the date to link to this post click member name to view archived images |
Is good to know I'm not the only one that doesn't know where to put the chairs, although I suppose it's not so good to know if you travel on NR. And plastic pivot bearings - they'll be printing plastic wheels next  |
||
|
posted: 18 Feb 2016 05:39 from: Matt M.
click the date to link to this post click member name to view archived images |
Hi Andrew, Not plastic pivots but the sacrificial liner between the pivot and bearing surface. It is simply to keep the steel sections apart. This saves trying to oil or re-grease so often in a hard to get to spot. Steel against steel is a horrible bearing surface and creates a lot of friction. This is a standard item in bogie mountings. The composite used would be selected for compression resistance and self lubrication. These items have been made from a variety of materials in the past, including asbestos. There is a mileage life Ship propeller shafts use resin impregnated paper bearings. If you have a car with MacPherson struts you will see something similar at the bottom of the coil, usually in the form of a nylon based cover over the last part of the coil. This keeps the the steel spring separated from the base, (or bottom compression plate), to ease the turning of the front wheels. When the cover wears out you will know as the spring will catch and let go on the plate as you turn the steering wheel making a clunking noise similar to the failure of your CV joints. Regards, Matt M. |
||
|
posted: 18 Feb 2016 06:52 from: Matt M.
click the date to link to this post click member name to view archived images |
Hi Andrew, My email displayed your message in such a way that I missed the word "bearing" in your message. My bad. Regards, Matt M. PS. I have been enjoying the 3D printing topic. |
||
|
posted: 18 Feb 2016 06:55 from: Andrew Barrowman
click the date to link to this post click member name to view archived images |
This derailment happened not too far from here. (I've rafted down that stretch of the river.) Boeing "float planes" Possibly a "track geometry" problem, but I can't find the official report. I imagine a lot of lawyers are involved. |
||
|
posted: 18 Feb 2016 07:09 from: Andrew Barrowman
click the date to link to this post click member name to view archived images |
Matt M. wrote: Hi Andrew,Hi Matt, You probably realized I was just joking around I was taking a shot at myself with the "wheels" comment - I have actually printed sample plastic locomotive drivers. Glad you are enjoying the turnout printing story, although "saga" might be more appropriate. Cheers! Andy |
||
| Please read this important note about copyright: Unless stated otherwise, all the files submitted to this web site are copyright and the property of the respective contributor. You are welcome to use them for your own personal non-commercial purposes, and in your messages on this web site. If you want to publish any of this material elsewhere or use it commercially, you must first obtain the owner's permission to do so. |