HarryHotspur wrote: BigRusty wrote:WRONG! Derailments only occur on poorly laid track. A rerailer can be placed before the portal if you don't know how to lay good track.Better yet, isolate the areas where derailments occur and FIX THEM! If it is caused by a defective car, FIX IT!Just take it one at a time, and soon you will never have ANY derailments again.Actually, the tunnel itself can cause derailments if not properly designed. For example, if the construction of the tunnel is such that the clearances for the train are very close to the tunnels walls, and if the tunnel is not ventilated properly, and if the track is not perfectly centered in the tunnel, then air pressure will build up more on one side of the train than the other. This results in an unbalanced Bernoulli effect and instant derailment. Streamlined trains such as F7s pulling streamlined passenger cars are especially vulnerable to this problem.This problem can be greatly alleviated by adding adequate ventelation shafts to the tunnel.- Harry
BigRusty wrote:WRONG! Derailments only occur on poorly laid track. A rerailer can be placed before the portal if you don't know how to lay good track.Better yet, isolate the areas where derailments occur and FIX THEM! If it is caused by a defective car, FIX IT!Just take it one at a time, and soon you will never have ANY derailments again.
WRONG!
Derailments only occur on poorly laid track. A rerailer can be placed before the portal if you don't know how to lay good track.
Better yet, isolate the areas where derailments occur and FIX THEM! If it is caused by a defective car, FIX IT!
Just take it one at a time, and soon you will never have ANY derailments again.
Actually, the tunnel itself can cause derailments if not properly designed. For example, if the construction of the tunnel is such that the clearances for the train are very close to the tunnels walls, and if the tunnel is not ventilated properly, and if the track is not perfectly centered in the tunnel, then air pressure will build up more on one side of the train than the other. This results in an unbalanced Bernoulli effect and instant derailment. Streamlined trains such as F7s pulling streamlined passenger cars are especially vulnerable to this problem.
This problem can be greatly alleviated by adding adequate ventelation shafts to the tunnel.
- Harry
HarryHotspur wrote:This problem can be greatly alleviated by adding adequate ventelation shafts to the tunnel.- Harry
Anything like these PRR Tunnel Steam Blowers at Gallitzin's Tunnel Hill?
http://www.northeast.railfan.net/images/tr_gallitz4.jpg
Conemaugh Road & Traction circa 1956