| Series | 390 7701 - 77?? | |
| Traction | Electric | |
| Power | 2400Kw (3218hp) | |
| Axle formation | Bo-Bo-Bo | |
| Wheel diameter | 920 mm | |
| Length of train set | 21.39m | |
| Maximum speed | 140 km/h | |
| Weight | 76 ton | |
| Number built | ?? | |
| Built by | Talbot Aken / Holec | |
| Years entered service | ?? |
DDM-1 : Doubledecker generation 1. This was the first generation doubledecker train, built in the 80's. These ones have red seats with a blue-white interior.
DDM-2 : Doubledecker generation 2. The second generation units were built in the 90's, otherwise known as the DD-AR units. These ones have green and blue seats, and a white-green interior.
DDM-3 : Doubledecker generation 3. The third generation units were also built in the 90's, and are also classified as DD-AR units. These ones are basically the same as the second generation units but with some technology updates.
DD-AR : Doubledecker Aglo-regio Materieel (Stop-train Doubledeckers)
The DD-AR coach sets had a passenger motorcoach at one end of the train and an NS1700 loco at the other end. The newer mDDM trainsets have an mDDM motorcoach at one end and a passenger motorcoach at the other.
The mDDM motorcoach was developed by NS Reizigers and built for NS Materieel engineering. Per motorcoach, there are three double-axle bogies. For the NS and most other railways in Europe, this is unique. This layout was necessary to be able to put down enough power to the rails whilst maintaining passenger space above. In total there are six asynchronous current motors available, each with a power rating of 400kW. Train braking can be entirely electro-dynamic, in principle, thus feeding power back into the system under braking. The space for electrical installation and power on the lower deck is very compacy. Because of this, the upper deck was able to be fitted out with proper seating arrangements and compartment doors, unlike other double-deck arrangements.
Because of a slightly lowered passenger floor, the position of the windows compared to the seats is more 'normal' on the upper deck. This means that regular sliding windows can be used for the ventilation - the windows don't have the recognisable bend in them that the other doubledeck units have. The floor between the passenger deck and the engine room is heavily insulated against both heat and noise.
The shape of the nose of the mDDM is basically the same as the DD-AR units. The mDDM is a push-pull unit and has lowered automatic couplers.
The NS DD-AR and mDDM are available in 1 colour scheme as part of the same download:
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NS DD-AR / mDDM | This is the familiar yellow and blue colour scheme. DD-AR units wearing these colours are seen all over the NS network. The advertising on the side of them varies. This one has the Delta Lloyd advert. | |||
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| Cabview | Passenger view | ||||
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