TGV-2N experimental set (Prototype for TGV Duplex), seen entering the Paris-Lyon HSL, heading South.
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This set was formed in late-1991 with:
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• 3 newly-built double-deck trailers; and
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• The 2nd-class end-trailer of TGV PSE set No 70, remodelled as a lab; and
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• 2 TGV Atlantique power-cars: 1 from set No 370 + 1 spare, then 2 from set No 330 (with TGV Réseau high-power brakes). 
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Later on, these were replaced with those from TGV Réseau set No 502.
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This prototype ran trials until 1994, at up to 350km/h.
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In 1995, the power-cars returned to revenue service, while the trailers were stabled.
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Lieusaint-Moissy.
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1992. 
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Photo by Georges Nadeau (Acknowledgements)
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# geon77@hotmail.com
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Posting and comment by P.L.Guillemin (plguillemin@yahoo.fr)