Cars & Transportation: Rail: “Question: How much does it cost to take Union Station to South Station, there and back?” plus 2 more |
- Question: How much does it cost to take Union Station to South Station, there and back?
- Question: What's the steepest possible gradient on Fell mountain railway system?
- Question: Howcome modern ships don't have smoke trail behind them?
| Question: How much does it cost to take Union Station to South Station, there and back? Posted: 28 Mar 2015 11:14 AM PDT Report AbuseAdditional DetailsIf you believe your intellectual property has been infringed and would like to file a complaint, please see our Copyright/IP Policy Report Abuse Cancel Report AbuseAdditional DetailsIf you believe your intellectual property has been infringed and would like to file a complaint, please see our Copyright/IP Policy Report Abuse Cancel Report AbuseAdditional DetailsIf you believe your intellectual property has been infringed and would like to file a complaint, please see our Copyright/IP Policy Report Abuse Cancel  |
| Question: What's the steepest possible gradient on Fell mountain railway system? Posted: 28 Mar 2015 08:37 AM PDT There are a good selection of articles on mountain railway systems in Wikipedia, which I recommend that you read. However, the steepest gradient recommended for a rack railway is 1:4, although the Locher rack system was said to be good up to 1:2. The various rack systems use a toothed rack rail between the running rails, with which the toothed driving/braking wheel engages. Thus, the train is effectively locked onto the track. It is superior to the Fell system, which only has a smooth centre rail which is gripped between pairs of wheels for traction and braking. It is therefore not as safe, cannot be used on very steep grades, but has the advantage of being cheaper to install and maintain. |
| Question: Howcome modern ships don't have smoke trail behind them? Posted: 27 Mar 2015 08:46 PM PDT If you look carefully, you should be able to see a bit of smoke and water vapor coming out. But, as the others have commented, modern diesel engines, when working properly, and with pollution-control technology in place, give off far less smoke than earlier ship propulsion systems. As for magnets, yes, there are some experimental train systems using such technology, but they are not yet in common use. |
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