High Speed Freight Vehicle
Encyclopedia
The High Speed Freight Vehicle was a generic term for a number of prototype 4-wheeled rail vehicles which were fitted with various experimental suspensions developed by the British Rail Research Division
in the late 1960s. The development was part of the investigation into the riding of vehicles and the interaction between wheel and rail.
HSFV1 was intended for fundamental empirical research into wheel/rail interaction and suspension dynamics to be better understood, following from work on wheel tread profiles. It was regularly run at speeds of up to 140 mph (225 km/h) on the Vehicles Laboratory's roller rig. It also performed at 90 mph whilst under test on the main line. Its suspension had two vertical coil springs and two vertical and one lateral hydraulic damper at each corner of the vehicle. This at a time when few freight trains travelled at more than forty mph and most passenger trains averaged about seventy mph. It supported theories of vehicle design which led to most later designs of train.
A similar converted UIC long wheelbase 4-wheeled ferry van (HSFV4) was utilised for high speed trials. HSFV4 had two coil springs with two 45 degree-inclined hydraulic dampers and a traction rod at each corner.
Although they were excellent riding vehicles in the railway of the day they were viewed as experimental only and far too expensive for widespread adoption. It was also thought that the sophisticated suspension would not stand up to the daily rigours to which freight vehicles were subjected.
However in the early 1970's these experiments resulted in ten covered air braked vans (COV-AB) being fitted with Taperlite suspension consisting of a long double leaf spring
and having hydraulic dampers inclined at 45 degrees to effect both vertical and lateral movement. On test these vehicles were capable of 90 miles/h but in service were limited to 75 mile/h (MPH) due to them running with other UIC long link suspension vans. Ultimately they were converted to standard after a few years, except two examples. One of these was used by the R&DD on the Tribometer train and one by the DM&EE on their own test trains. Both survive to this day at the Nottingham Heritage Centre at Ruddington.
HSFV1 survived until recently in Serco stock at the RTC, but in May 2010 was moved out on its way to preservation. It will eventually be displayed at the Electric Railway Museum in Coventry. It was very kindly donated to the APT-E preservation Group by Serco, who recognised its important place in UK railway research, unlike the NRM who refused to give it a home.
HSFV4 is also still extant at the Eden Valley Railway where it is undergoing restoration.
A number of vehicles were produced, including HSFV1 and HSFV4, with various tests being carried out between 1975 and 1979. A variant of HSFV1 formed the basis for the suspension of the Class 140
Pacer
railbus.
British Rail Research Division
The British Rail Research Division came into being in 1964 directly under the control of the British Railways Board, moving into purpose-built premises at the Railway Technical Centre in Derby. The intention was to improve railway reliability and efficiency, while reducing costs and improving revenue...
in the late 1960s. The development was part of the investigation into the riding of vehicles and the interaction between wheel and rail.
HSFV1 was intended for fundamental empirical research into wheel/rail interaction and suspension dynamics to be better understood, following from work on wheel tread profiles. It was regularly run at speeds of up to 140 mph (225 km/h) on the Vehicles Laboratory's roller rig. It also performed at 90 mph whilst under test on the main line. Its suspension had two vertical coil springs and two vertical and one lateral hydraulic damper at each corner of the vehicle. This at a time when few freight trains travelled at more than forty mph and most passenger trains averaged about seventy mph. It supported theories of vehicle design which led to most later designs of train.
A similar converted UIC long wheelbase 4-wheeled ferry van (HSFV4) was utilised for high speed trials. HSFV4 had two coil springs with two 45 degree-inclined hydraulic dampers and a traction rod at each corner.
Although they were excellent riding vehicles in the railway of the day they were viewed as experimental only and far too expensive for widespread adoption. It was also thought that the sophisticated suspension would not stand up to the daily rigours to which freight vehicles were subjected.
However in the early 1970's these experiments resulted in ten covered air braked vans (COV-AB) being fitted with Taperlite suspension consisting of a long double leaf spring
Leaf spring
Originally called laminated or carriage spring, a leaf spring is a simple form of spring, commonly used for the suspension in wheeled vehicles...
and having hydraulic dampers inclined at 45 degrees to effect both vertical and lateral movement. On test these vehicles were capable of 90 miles/h but in service were limited to 75 mile/h (MPH) due to them running with other UIC long link suspension vans. Ultimately they were converted to standard after a few years, except two examples. One of these was used by the R&DD on the Tribometer train and one by the DM&EE on their own test trains. Both survive to this day at the Nottingham Heritage Centre at Ruddington.
HSFV1 survived until recently in Serco stock at the RTC, but in May 2010 was moved out on its way to preservation. It will eventually be displayed at the Electric Railway Museum in Coventry. It was very kindly donated to the APT-E preservation Group by Serco, who recognised its important place in UK railway research, unlike the NRM who refused to give it a home.
HSFV4 is also still extant at the Eden Valley Railway where it is undergoing restoration.
A number of vehicles were produced, including HSFV1 and HSFV4, with various tests being carried out between 1975 and 1979. A variant of HSFV1 formed the basis for the suspension of the Class 140
British Rail Class 140
The British Rail Class 140 was the prototype of the Pacer diesel multiple unit. Much of the bodywork was constructed using Leyland National bus components, with the exception of the cabs, in 1980....
Pacer
Pacer (train)
Pacer is the operational name of the British Rail Classes 140, 141, 142, 143 and 144 diesel multiple unit railbuses, built between 1984 and 1987...
railbus.