Difference between revisions of "Second Life Railroad/SLRR standards"

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==Description==
==Description==
 
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Second Life Railroad uses a standardized railway track for vehicles to run on. On this Page you find the standard measurements and information associated with the railway track.
Second Life Railroad uses a standardized railway track for vehicles to run on. On this Page you find the standard measurements and information associated with the railway track.


In the future a description of an open source switch point will also be made available here.
In the future a description of an open source switch point will also be made available here.


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<small>
===Open Access===
===Open Access===
</small>
There are now several standard gage railroads in SL, some on private land, some on Linden land. Some SL residents have expressed an interest in operating trains on these railroads, much as anyone can operate a car on the roads in SL.  Should this be allowed, standardization of the guidance, control and track will help residents develop suitable vehicles.
There are now several standard gage railroads in SL, some on private land, some on Linden land. Some SL residents have expressed an interest in operating trains on these railroads, much as anyone can operate a car on the roads in SL.  Should this be allowed, standardization of the guidance, control and track will help residents develop suitable vehicles.


<small>
===Guidance===
===Guidance===
The existing system involves a non-phantom center rail, called Guide or RAIL.  I have been told that trains initially running on these tracks use this rail as a physical steering mechanism, presumably a vehicle linear motor pushes the vehicle and collision with the rail steers it.
</small>
Guidance is the actual way the vehicle "knows" where the track is and uses it to steer itself.


Other vehicals use a sensor and traget system to steer, collision is unnecessary.
The existing system involves a non-phantom (invisible) center rail, called ''Guide''. The trains initially running on these tracks use this rail as a physical steering mechanism. A vehicle linear motor pushes the vehicle and collisions with the rail steers it.


Other vehicles use a sensor and target system to steer, collision is unnecessary.
<small>
===Control===
===Control===
If  multiple user trains are allowed on a track traffic control will be necessary. Something like the block section control system should work, using  llSay on a negative channel, phantom alpha detectors on the track, and signals  for realism.
</small>
Control is the way the rail network as a whole works safely.  
At the moment (10-2009) there is no such system in place.


A larger problems is what to do about traffic in the opposite direction. Block Section control could work with a passing siding for each section. Which leads to...
;Problem description:
:If  multiple user trains are allowed on a track ''traffic control'' will be necessary. Something like the block section control system should work, using llSay on a negative channel, phantom alpha detectors on the track, and signals for realism.
:A larger problems is what to do about traffic in the opposite direction. Block Section control could work with a passing siding for each section. Which leads to...
:Another problem - switches.  If the center guide rail is retained, then it could me turned and moved to divert a train.  If a flat or phantom guide rail is used, names can be switched to change which rail is active.


Another problem - switches.  If the center guide rail is retained, then it could me turned and moved to divert a train.  If a flat or phantom guide rail is used, names can be switched to change which rail is active.
<small>
===Gage===
</small>
Gage is the width of the actual vehicle / track combination.


===Gage===
This is not very important, as it is for appearance only, but it would be good to have a standard that builders can use.
Not super important, as it is for appearance only, but it would be good to have a standard that builders can use.


<small>
===Railbed===
===Railbed===
</small>
Railbed is the actual track design.
Theres is presently:
Theres is presently:
*Flat - cheap for prims, does not look so good, good for sliding on.
*Flat - cheap for prims, does not look so good, good for sliding on.
Line 44: Line 61:
===Railway Track basics===
===Railway Track basics===
</small>
</small>
* information will follow shortly
SLRR Tuliptree to Bhaga
        Gage: 1.96M
        Guidance: 'Guide',  0.5x0.5M, Alpha, non-Phantom.
        Railbed: 3-D partly phantom
        Land Owner: Govenor Linden
       
SLRR  Crenulate to Paranthrene - Branch line under construction of LDPW
        Gage: 1.96M
        Guidance: 'Guide',  0.5x0.5M, Alpha, non-Phantom.
        Railbed: 3-D partly phantom
        Land Owner: Govenor Linden
       
SLRR Paranthrene  to Hooktip - Unfinished line with switches
        Gage: 1.96M
        Guidance: 'Guide',  0.5x0.5M, Alpha, non-Phantom.
        Railbed: 3-D partly phantom
        Land Owner: Govenor Linden
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==Source==
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The above information was collected by the Second Life Railway Consortium {{SLURL2|http://slurl.com/secondlife/Tuliptree/107/131/30}} with the help of {{User2|Stryker Jenkins}}, {{User2|Moundsa Mayo}}. {{User2|Qie Niangao}} and {{User2|Kitto Flora}}.
 
The [[LDPW]] is currently the "owner" of the SLRR track. The SLRC only collected existing data for these wiki pages, but did not set these standards. They evolved over time as the Linden Lab employees constructed the Second Life Railroad.
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Revision as of 05:11, 22 October 2009

Description

Second Life Railroad uses a standardized railway track for vehicles to run on. On this Page you find the standard measurements and information associated with the railway track.

In the future a description of an open source switch point will also be made available here.

Open Access

There are now several standard gage railroads in SL, some on private land, some on Linden land. Some SL residents have expressed an interest in operating trains on these railroads, much as anyone can operate a car on the roads in SL. Should this be allowed, standardization of the guidance, control and track will help residents develop suitable vehicles.

Guidance

Guidance is the actual way the vehicle "knows" where the track is and uses it to steer itself.

The existing system involves a non-phantom (invisible) center rail, called Guide. The trains initially running on these tracks use this rail as a physical steering mechanism. A vehicle linear motor pushes the vehicle and collisions with the rail steers it.

Other vehicles use a sensor and target system to steer, collision is unnecessary.

Control

Control is the way the rail network as a whole works safely. At the moment (10-2009) there is no such system in place.

Problem description
If multiple user trains are allowed on a track traffic control will be necessary. Something like the block section control system should work, using llSay on a negative channel, phantom alpha detectors on the track, and signals for realism.
A larger problems is what to do about traffic in the opposite direction. Block Section control could work with a passing siding for each section. Which leads to...
Another problem - switches. If the center guide rail is retained, then it could me turned and moved to divert a train. If a flat or phantom guide rail is used, names can be switched to change which rail is active.

Gage

Gage is the width of the actual vehicle / track combination.

This is not very important, as it is for appearance only, but it would be good to have a standard that builders can use.

Railbed

Railbed is the actual track design.

Theres is presently:

  • Flat - cheap for prims, does not look so good, good for sliding on.
  • 3-D phantom - costs more prims, looks good, good for sliding on.
  • 3-D non-phantom - costs more prims, looks good, not so good for sliding on?

Standards

Railway Track basics

SLRR Tuliptree to Bhaga 

       Gage: 1.96M
       Guidance: 'Guide',  0.5x0.5M, Alpha, non-Phantom.
       Railbed: 3-D partly phantom 
       Land Owner: Govenor Linden

SLRR Crenulate to Paranthrene - Branch line under construction of LDPW 

       Gage: 1.96M
       Guidance: 'Guide',  0.5x0.5M, Alpha, non-Phantom.
       Railbed: 3-D partly phantom
       Land Owner: Govenor Linden

SLRR Paranthrene to Hooktip - Unfinished line with switches 

       Gage: 1.96M
       Guidance: 'Guide',  0.5x0.5M, Alpha, non-Phantom.
       Railbed: 3-D partly phantom
       Land Owner: Govenor Linden

Source

The above information was collected by the Second Life Railway Consortium Tuliptree (107, 131, 30) with the help of Stryker Jenkins, Moundsa Mayo. Qie Niangao and Kitto Flora.

The LDPW is currently the "owner" of the SLRR track. The SLRC only collected existing data for these wiki pages, but did not set these standards. They evolved over time as the Linden Lab employees constructed the Second Life Railroad.

Also See

Retrieved from "https://wiki.secondlife.com/w/index.php?title=Second_Life_Railroad/SLRR_standards&oldid=625123"