The FS Class E.471 locomotives were prototype three-phase AC electric locomotives designed for the Italian State Railways (FS). They constituted the first Italian experiment in using a phase converter. The final goal was to power them with single-phasealternating current, constituting the first case of a European locomotive of this type designed according to modern criteria. However, the difficulty of the development, and political interference, led to the abandonment of the project.
In 1928, following the experience acquired in the three-phase high-voltage (10 kV) AC operation with FS Class E.470, a new locomotive of 3,270 kilowatts (4,390 hp) was built, which was supposed to represent the ultimate development of three-phase traction. It was called E.471, and it had the same 1′D1′ wheel arrangement as E.470, but it was technically different. Designed by the famous engineer Kálmán Kandó and built in the plant of Construzioni Elettro Meccaniche di Saronno (CEMSA), it was aimed at the future development of three-phase traction. According to the research of the engineer Erminio Mascherpa [it][1] the project was not developed by the FS but autonomously by CEMSA thanks to the collaboration it had established with Kandó.
According to some oral testimonies, after management changes at the Material and Traction Service of FS due to the advent of Fascism in Italy, the project was judged "an error of the engineer Donati" and the test results were held to be unsatisfactory. Ten locomotives had been ordered but the project was terminated early and only one was actually built. On the other hand, Mascherpa provided an impressive documentation from which it seems that, at the end of the test runs, a tractive effort corresponding to that envisaged was achieved. Rather, the real reason for the termination was the hostility of the new FS leadership to the engineer Alfredo Donati (former director of the Special Electrification Unit of the General Directorate of FS) who was deported following the appointment of the extraordinary commissioner Edoardo Torre [it].
The success of direct current experiments, favoured by the new railway management, meant that the E.471 remained at the prototype stage and never entered regular service.
Technical detailsedit
These were rotary converter locomotives and the long-term aim was to run them from a single-phase supply. For the tests, they were run from a three-phase supply at either 3.6 kV, 16.7 Hz or 10 kV 45 Hz.[2]
Current collection was made by a pair of twin-collector bow collectors. Mechanical drive from the two frame-mounted traction motors to the wheels was by means of a Kandó triangle drive and coupling rods.
Referencesedit
^Mascherpa, Erminio (2005). E.471 Locomotive di sogno. Rovereto: Nicolodi. ISBN88-8447-199-0.
^"Locomotiva elettrica trifase 10 kV CA 45 Hz E.471.001". leferrovie.it. Retrieved 24 February 2018.
Further readingedit
Wikimedia Commons has media related to FS E.471.
Pietro Verole, La grande trazione elettrica, Milano, Hoepli, 1926
Giuseppe Bianchi, Dati relativi alla costruzione e all'esercizio delle locomotive elettriche trifasi e a corrente continua, in Rendiconti della XXXIII Riunione annuale dell'AEI, 1928
Attilio Giaquinto, Un nuovo tipo di locomotiva per la trazione elettrica monopolifase, in Rendiconti della XXXIII Riunione annuale dell'AEI, 1928, memoria n. 46, pp. 426–437
Uberto Bajocchi, Il sistema Kandó. La elettrificazione della ferrovia meridionale Budapest-Vienna, in Rivista tecnica delle ferrovie italiane, a. 23, 45 (1934), n. 3, pp. 123–173 e tav. VII f. t.
Uberto Bajocchi, Stato attuale dell'elettrificazione ferroviaria in Italia, in L'energia elettrica, 1937-1940
Mario Loria, Storia della trazione elettrica ferroviaria in Italia, Firenze, Giunti-barbera, 1971
Giovanni Cornolò, Locomotive elettriche FS, Parma, Ermanno Albertelli, 1994
Giovanni Cornolò, Martin Gut, Ferrovie trifasi nel mondo. 1895-2000, Parma, Ermanno Albertelli, 1999
Salvo Bordonaro, Le locomotive di Nicola Romeo, in Tutto treno & storia, (2012), n. 27, pp. 60–69
Claudio Pedrazzini, Storia dell'elettrificazione e dei locomotori trifasi F.S., Brescia, Club Fermodellistico Bresciano, 2017, ISBN978-88-942040-7-0.
May 08, 2024
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This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations October 2020 Learn how and when to remove this message The FS Class E 471 locomotives were prototype three phase AC electric locomotives designed for the Italian State Railways FS They constituted the first Italian experiment in using a phase converter The final goal was to power them with single phase alternating current constituting the first case of a European locomotive of this type designed according to modern criteria However the difficulty of the development and political interference led to the abandonment of the project FS Class E 471Type and originPower typeElectricBuilderCEMSABuild date1928Total produced1SpecificationsConfiguration AAR1 D 1 UIC1 D1 Gauge1 435 mm 4 ft 8 1 2 in standard gaugeWheel diameter1 630 mm 64 17 in Length13 5 m 44 ft 3 1 2 in Adhesive weight58 tonnes 57 long tons 64 short tons Loco weight92 tonnes 91 long tons 101 short tons Electric system sAC 3 6 kV 16 7 Hz or 10 kV 45 HzCurrent pickup s overhead lineTraction motors2Performance figuresMaximum speed75 km h 47 mph 16 7 Hz 100 km h 62 mph 45 Hz Power output1 630 kW 2 190 hp 16 7 Hz 3 270 kW 4 390 hp 45 Hz CareerOperatorsFS Contents 1 History 2 Technical details 3 References 4 Further readingHistory editIn 1928 following the experience acquired in the three phase high voltage 10 kV AC operation with FS Class E 470 a new locomotive of 3 270 kilowatts 4 390 hp was built which was supposed to represent the ultimate development of three phase traction It was called E 471 and it had the same 1 D1 wheel arrangement as E 470 but it was technically different Designed by the famous engineer Kalman Kando and built in the plant of Construzioni Elettro Meccaniche di Saronno CEMSA it was aimed at the future development of three phase traction According to the research of the engineer Erminio Mascherpa it 1 the project was not developed by the FS but autonomously by CEMSA thanks to the collaboration it had established with Kando According to some oral testimonies after management changes at the Material and Traction Service of FS due to the advent of Fascism in Italy the project was judged an error of the engineer Donati and the test results were held to be unsatisfactory Ten locomotives had been ordered but the project was terminated early and only one was actually built On the other hand Mascherpa provided an impressive documentation from which it seems that at the end of the test runs a tractive effort corresponding to that envisaged was achieved Rather the real reason for the termination was the hostility of the new FS leadership to the engineer Alfredo Donati former director of the Special Electrification Unit of the General Directorate of FS who was deported following the appointment of the extraordinary commissioner Edoardo Torre it The success of direct current experiments favoured by the new railway management meant that the E 471 remained at the prototype stage and never entered regular service Technical details editThese were rotary converter locomotives and the long term aim was to run them from a single phase supply For the tests they were run from a three phase supply at either 3 6 kV 16 7 Hz or 10 kV 45 Hz 2 Current collection was made by a pair of twin collector bow collectors Mechanical drive from the two frame mounted traction motors to the wheels was by means of a Kando triangle drive and coupling rods References edit Mascherpa Erminio 2005 E 471 Locomotive di sogno Rovereto Nicolodi ISBN 88 8447 199 0 Locomotiva elettrica trifase 10 kV CA 45 Hz E 471 001 leferrovie it Retrieved 24 February 2018 Further reading edit nbsp Wikimedia Commons has media related to FS E 471 Pietro Verole La grande trazione elettrica Milano Hoepli 1926 Giuseppe Bianchi Dati relativi alla costruzione e all esercizio delle locomotive elettriche trifasi e a corrente continua in Rendiconti della XXXIII Riunione annuale dell AEI 1928 Attilio Giaquinto Un nuovo tipo di locomotiva per la trazione elettrica monopolifase in Rendiconti della XXXIII Riunione annuale dell AEI 1928 memoria n 46 pp 426 437 Uberto Bajocchi Il sistema Kando La elettrificazione della ferrovia meridionale Budapest Vienna in Rivista tecnica delle ferrovie italiane a 23 45 1934 n 3 pp 123 173 e tav VII f t Uberto Bajocchi Stato attuale dell elettrificazione ferroviaria in Italia in L energia elettrica 1937 1940 Mario Loria Storia della trazione elettrica ferroviaria in Italia Firenze Giunti barbera 1971 Giovanni Cornolo Locomotive elettriche FS Parma Ermanno Albertelli 1994 Giovanni Cornolo Martin Gut Ferrovie trifasi nel mondo 1895 2000 Parma Ermanno Albertelli 1999 Salvo Bordonaro Le locomotive di Nicola Romeo in Tutto treno amp storia 2012 n 27 pp 60 69 Claudio Pedrazzini Storia dell elettrificazione e dei locomotori trifasi F S Brescia Club Fermodellistico Bresciano 2017 ISBN 978 88 942040 7 0 Retrieved from https en wikipedia org w index php title FS Class E 471 amp oldid 1188878052, wikipedia, wiki, book, books, library,
