Thứ Tư, 3 tháng 6, 2009

Dalat cog railway







The block of sepia photos underneath is a unique, rare collection of pictures of Dalat cog railway taken at an era when Dalat route was still under construction or in early operation. A lot of credits went to Francois B. who kept digging out those historical photos from many different sources.
DALAT RAILROAD'S CONSTRUCTION (1903-1932)






DALAT RAILWAY OPERATION (1932 - 1967)












DALAT TRAIN STATION SEEN FROM THE AIR (1968)
The following photos show not only Dalat train station seen from the air in 1968, but also the cogwheel steam locomotives when the Lang Bian rail line is still open. Thank Bill Robie for such rare, interesting pictures (more to come). At this moment, these are the only color photos available that show the swiss-made steam locomotives in operation at Dalat.





If your are a Vietnamese and would like to read this interesting story in Vietnames language version. Francois B. had offered a series of numerous parts at his Blog. This is a great educational and cultural adventure of Vietnam Hoa Xa's history and beyond... to the Alpes mountain and Rhone glacier. For a double ride, click on this Tu Krong Pha (Viet Nam) den Furka (Thuy Si). The long story consists of 13 parts.
(Added 4 photos 'in bright beige background') DON DUONG'S RAILWAY SECTION & IRON BRIDGE OF DRAN










(Added 10 photos 'in bright beige background') DA NHIM DAM & DRAN PASS




















THE NOSTALGIA OF THAP CHAM STATION (PHAN RANG)










LANG-BIAN COG RAILWAY OF TODAY
The following set of photos was taken on 8 September 2005. In a Toyota Land Cruiser, John Haseman and Jim Michener made the trip down the mountain. The cog railway, now abandoned, is commonly known as the Dalat-Phan Rang Line.
PHOTOS OF ABANDONED DALAT COG RAILWAY (2005)















PHOTOS OF SONG PHA–DALAT RAILROAD (1990)




















(Photo source: Zahnradbahn Song Pha - Da Lat)
SO, WHAT IS COG RAILWAY; AND HOW DOES IT WORK?
The extra reading article below would give you more knowledge on cog railway. It explains how the cog rack system works, especially the Abt system, the one used on Lang-Bian cog railway. Enjoy!A cog railway, rack-and-pinion railway or rack railway is a railway with a special toothed rack rail or rack mounted on the railroad ties (sleepers), usually between the running rails. The trains are fitted with one or more cog wheels or pinions that mesh with this rack rail. This allows the trains to operate on steeply inclined slopes.Most rack railways are mountain railways, although a few are transit railways or tramways built to overcome a steep gradient in an urban environment.The first cog railway in the world was the Middleton Railway in Leeds where the first commercial steam locomotive, The Salamanca ran in 1812. This used a rack and pinion system designed by John Blenkinsop.The first mountain cog railway was the Mount Washington Cog Railway in the US state of New Hampshire, which carried its first fare-paying passengers in 1868 and reached the summit of Mount Washington in 1869. The first rack railway in Europe was the Vitznau-Rigi-Bahn on Mount Rigi in Switzerland, which opened in 1871. Both lines are still running today.There are 4 different rack systems: Riggenbach, Strub, Abt and Locher. The one used on Dalat cog railway is Abt rack system
COG RACK & COG WHEELS OF ABT SYSTEM
The Abt rack system was devised by Roman Abt, a Swiss locomotive engineer working for a Riggenbach-equipped line, as an improved rack system. The Abt rack features steel plates mounted vertically and in parallel to the rails, with rack teeth machined to a precise profile in them. These engage with the locomotive's pinion teeth much more smoothly than the Riggenbach system. Two or three parallel sets of Abt rack plates are used, with a corresponding number of driving pinions on the locomotive, to ensure that at least one pinion tooth is always engaged securely.Today, the majority of rack railways use the Abt system.
source
VNAF PHOTOS






Không có nhận xét nào:

Đăng nhận xét