Deerfield & Roundabout Railway Track & Wheel Data
Standards for Level Condition of Tangent and Other Track
and Elevation of Curved Track.
Maximum Speed Permitted on Curved Track.
Maximum Speed Permitted on Diverging Route of Turnouts.
Document DRTRK33 (Revision 04-21-2010)
1. The deviation from level condition (also referred to as zero crosslevel) at any point on tangent track or tracks of a turnout or crossing shall not be more than 3/16 inch.
2. The standard elevation of the outside rail above the inside rail of curved track (also referred to as elevation or superelevation) shall be 3/16 inch.
3. The elevation of the outside rail above the inside rail of curved track may vary from standard after being placed in service, but shall be restored to standard elevation when the elevation becomes less than 1/16 inch or more than 5/16 inch.
4. Where a spiral is used between tangent track and curved track, the change from level condition on the tangent track to the specified elevation of the outside rail above the inside rail on the curved track shall be at a uniform rate for the length of the spiral.
5. Where a spiral is not used between tangent track and curved track, the change from level condition on the tangent track to the specified elevation of the outside rail above the inside rail on the curved track shall be uniformly increased (also referred to as run off) on the tangent track starting at a point not more than 10 feet and not less than 5 feet before the point of tangent to circular curve (T.C.).
6. Where a spiral is not used between curved track and tangent track, the change from the elevation of the outside rail above the inside rail on the curved track to level condition on the tangent track shall be uniformly decreased (also referred to as run off) on the tangent track ending at a point not more than 10 feet and not less than 5 feet after the point of circular curve to tangent (C.T.).
7. Other D. & R. Ry. drawings or standards may, with specific instructions, supersede provisions of Paragraphs 1 through 6 inclusive above.
8. Unless directed otherwise the maximum speed permitted on curved track shall be as designated in Table No. 1.
9. Unless directed otherwise the maximum speed permitted on the diverging route of a turnout shall be as designated in Table No. 2.
Document DRTRK33 Table No. 1 Revision 04-21-2010
Maximum Speed Permitted on Curved Track
1 Actual MPH Equals 8 Scale MPH
|
|
Curve Track at |
Curve Track at |
|
40 to less than 50 |
1.9 |
4.2 |
|
50 to less than 60 |
2.2 |
4.7 |
|
60 to less than 70 |
2.4 |
5.2 |
|
70 to less than 80 |
2.6 |
5.6 |
|
80 to less than 90 |
2.7 |
6.0 |
|
90 to less than 100 |
2.9 |
6.3 |
|
100 and greater than 100 |
3.1 |
6.7 |
Document DRTRK33 Table No. 2 Revision 04-21-2010
Maximum Speed Permitted on Diverging Route of Turnouts
1 Actual MPH Equals 8 Scale MPH
|
|
Lateral Turnout |
Equilateral Turnout |
|
6 |
Not Installed |
2.4 |
|
7 |
1.9 |
3.1 |
|
8 |
2.4 |
3.1 |
|
9 |
2.6 |
3.1 |
|
10 |
2.9 |
3.1 |