1) What is considered to be a super elevated track and/or curve? Is it past a certain specified height over 0 grade?
2) If a track is secure to the surface/roadbed what make stringlining more susceptible on elevated track then on grade track. I have seen this mentioned on various threads here but would like to better understand as to why it occurs. Am I missing something that it has to do with inclines or grades? As far as flat level track goes I'm not seeing the difference at various heights.
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Stringling occurs when you attempt to pull a train and the lightweight cars are positioned ahead of heavier weighted cars. It's happens moreso on elevated curves because with the outer rail higher than the inner rail positions the cars center of gravity differently than if the track was payed flat on the board. To combat stringling, it's advisable to check the weight of each at and get their weight as close to the nmra recommend practice of 5oz plus 1oz for each (real) inch of car length. When all the cars are near the nmra recommend weight, strigling is greatly deminished! With a few exceptions,most of my cars are at the nmra recommend weight and stringling hardly occurs!
prrhorseshoecurve posted:Stringling occurs when you attempt to pull a train and the lightweight cars are positioned ahead of heavier weighted cars. It's happens moreso on elevated curves because with the outer rail higher than the inner rail positions the cars center of gravity differently than if the track was payed flat on the board. To combat stringling, it's advisable to check the weight of each at and get their weight as close to the nmra recommend practice of 5oz plus 1oz for each (real) inch of car length. When all the cars are near the nmra recommend weight, strigling is greatly deminished! With a few exceptions,most of my cars are at the nmra recommend weight and stringling hardly occurs!
OK looks like I misunderstood super elevated curves. I'm now guessing this pertains to banking and not track height?
Sparky74,
Correct; super-elevated curves mean that the rail on the outside of the curve is higher than the rail on the inside of the curve. The purpose is to prevent the inertia of high speed trains from pushing the trains off the outside rail of the curve by forcing a "lean" inside.
Chuck
PRR1950 posted:Sparky74,
Correct; super-elevated curves mean that the rail on the outside of the curve is higher than the rail on the inside of the curve. The purpose is to prevent the inertia of high speed trains from pushing the trains off the outside rail of the curve by forcing a "lean" inside.
Chuck
OK thanks for the help. I understand banked curves and their purpose but was mixed up with terminology of super elevated. All clear now. Appreciate everything.
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