MF 77

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MF 77
A refurbished MF 77 at Maison Blanche, Paris Métro Line 7.
Interior of a refurbished MF 77
In service	26 September 1978–present
Manufacturer	Alstom, CEM-Oerlikon, Creusot-Loire, ANF-Industry, Jeumont-Schneider
Replaced	Sprague-Thomson
Constructed	1976–1986
Refurbished	2007 (Line 13) 2019 (Line 7) 2023 (Line 8)
Number built	985 cars (197 trainsets)
Successor	MF 19
Formation	5 cars per trainset
Capacity	574 per trainset
Operators	RATP
Lines served
Specifications
Car body construction	Aluminium alloy
Train length	77.5 m (254 ft 3 in)
Car length	Motor car: 15.48 m (50 ft 9 in)
Width	2.46 m (8 ft 1 in)
Height	3.46 m (11 ft 4 in)
Doors	3 pairs per side, per car
Maximum speed	Design: 100 km/h (62 mph) Service: 70 km/h (43 mph)
Weight	Trainset: 131 t (289,000 lb) Motor car: 29.5 t (65,000 lb) Trailer car: 21.5 t (47,000 lb)
Traction system	Jeumont-Schneider thyristor chopper Cars 1–187: analog control Cars 188–197: microprocessor control
Traction motors	MF5/TAO 679/4ELH 3054
Power output	1,590 kW (2,130 hp)
Transmission	Cardan shaft and axle mounted gear wheel, 1:4.445 ratio
Acceleration	3.2 km/(h⋅s) (2.0 mph/s)
Deceleration	3.6 km/(h⋅s) (2.2 mph/s)
Electric system(s)	Third rail, 750 V DC
Current collector(s)	Contact shoe
Bogies	MTE Cast steel, H shape[1]
Braking system(s)	Dynamic, disc
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The MF 77 (French: Métro Fer appel d'offres de 1977; English: Steel-wheeled metro ordered in 1977) is a steel-wheeled variant of the rolling stock used on the Paris Métro. First used in 1978, it now runs on Lines 7, 8, and 13.

Unlike previous models, the MF 77 was designed for travel into the immediate suburbs of Paris, and as a result has a maximum speed of 100 km/h (62 mph) which has yet to be fully utilized. In addition, it sports a new, curved silhouette with a wider midsection. Its original exterior colors, blue and white, led passengers to refer to it as le métro blanc, or white metro.

History

Replacing the Sprague

In the early 1970s, upon the completion of the MF 67 delivery, at the time the newest steel-wheeled trains on the Métro, many technological advances in braking and traction caused the RATP, which oversees operations of the Parisian public transport network, to examine the possibilities for new steel, rather than rubber, wheeled trains to replace the aging Sprague-Thomson fleet. Thus, the RATP commissioned a consortium of companies including Alstom, CEM, Creusot-Loire, and Jeumont Schneider, to design a new addition to the Métro's rolling stock, the MF 77.

The RATP's goal at the time of commission was for 1,000 cars, 600 of which to contain engines for 200 five-car sets. Later, the order was reduced to 187 sets for a total for 935 cars. The first trains were delivered in the summer of 1978 and entered passenger service on 26 September that year on Line 13, whose MF 67 trains were transferred to Line 8. A second order of ten sets was contracted on 4 February 1983, released in 1985 and 1986.

The trains on Line 13 recently underwent their mid-life refurbishment, which included a new interior configuration, updated destination signage, lighting and mechanical improvements. However, the RATP was largely dissatisfied with the refurbishment of the Line 13 trains, citing problems with the contractor that handled the work, as well as defects in the workmanship. Though it is expected that the trains on Line 8 will be refurbished next, followed by the trains on Line 7, the RATP will explore other avenues to carry out the work, even if it means that the refurbishment is done on a lesser scale (similar to that of the refurbishment of the MF 67 on Lines 10 and 12).^[2]

As of January 2019, trains on the 7 and 8 are undergoing renovation, but on a lesser scale to that of trains on the 13.^[3] While seating on board the trains are extremely similar, noticeable differences between the two projects include:

• Keeping the 2X2 (2 forward-facing seats per side) configuration in the middle of each car, instead of going to the 2X1 (alternating 2 forward-facing seats on one side and 1 forward facing seat on the opposing side) configuration seen on the 13. The ends of each car have been fitted with longitudinal seating as their counterparts on the 13 were.
• Retaining the ceiling lighting panels, grates, and other components as opposed to replacing them completely.
• Retaining elements such as handlebars and static strip maps. Some new handlebars were added to each car however.
• Not installing automated announcements, unlike their counterparts on the 13 that are equipped with such announcements, as well as electronic strip maps and door warning lights.

Additionally, renovated trains on the 7 and 8 will sport the new joint RATP/Île-de-France Mobilités (formerly known as STIF) blue/white livery.

Formations

In date of 25 December 2021:

• 197 MF77 trainsets were in service and were formed as shown below, with three motored ("M") cars and two non-powered trailer ("T") cars or 3M2T.
• 72 trainsets on Line 7 based in Choisy (Paris) dépot
• 58 trainsets on Line 8 based in Lourmel (Paris) and Créteil dépot
• 66 trainsets on Line 13 based in Châtillon and Pleyel (Saint-Denis) dépot
• Five cars (M.30138 - B.32138 - NA.31069 - B.32154 - M.30154)^{[note 1]}was converted to "BOA" experimental train and it was scrapped in 1980.

• CH: Choppers (Kesar system)
• CP: Air compressor
• SIV: Static inverter
• Car 3 was formerly a 1st class car

Fleet

The number of Mf77 trainsets is 195 :72 for M7 Line, 58 for M8 Line, and 65 for M13 Line

• Listing Fleet Mf77 (in french)

Technical specifications

• Train-sets delivered: 197
• Configuration: M+T+M+T+M (Formation I)
• Overall length: 77.40 metres (253 ft 11 in)
• Maximum width: 2.45 metres (8 ft 0 in)
• Weight: 131 tonnes (289,000 lb) — 29.5 tonnes (65,000 lb) for the motor coaches, 21.5 tonnes (47,000 lb) for the trailers
• Material: Aluminium alloy
• Power: 1,590 kilowatts (2,130 hp)
• Acceleration: 0.90 metres per second squared (3.0 ft/s²) under normal load
• Braking: Dynamic brakes (rheostatic) with regeneration down to 7 km/h (4.3 mph), railway air brake with one disc brake on all axles and one brake shoe on the rims of trailer (unpowered) wheels
• Bogies: Cast solid wheel
• Maximum speed: 100 kilometres per hour (62 mph)
• Authorized speed: 70 kilometres per hour (43 mph)
• Doors: 3 plug doors per side, per car, with manual operation and an opening width of 1,575 millimetres (62.0 in)
• Air conditioning: None (forced ventilation)
• Seats: 128 + 118 (folding seats)
• Capacity: 574 people

Gallery

• 
  Old interior
• 
  Renovated interior (Line 13)
• 
  Renovated interior (Line 7)
• 
  Driver's cab
• 
  Underframe of the front car of a MF 77 train, showing the autopilot equipment
• 
  New livery on a refurbished MF 77 train

Other networks

• Lisbon Metro had a forked variant called ML79

References

External links

Wikimedia Commons has media related to MF 77.