I'm planning my first N layout and I'm thinking of building it double deck. This would mean constructing a helix. Can anybody tell me what are the minimum radius and the maximum grade I should use? What sort of train length would one locomotive be able to handle? I know the grtades and curves should be as easy as possible but space is limited, hence the need to think double deck..
What sort of area do you have for your layout? Mine is quite small, but around the walls, and is on two levels. The grade climbs for a whole circuit of the room, so is limited to 3%, which is quite steep, but does not cause any problems. We can still run 5-car trains, with 5-7 locomotives A helix takes up a lot of space, and can be difficult to gain access for maintenance, etc. Ok if you have the space, but I went with the 'three times round the room' method ------------------ Alan The perfect combination - BNSF and N Scale! www.ac-models.com Andersley Western Railroad Alan's American Gallery
If you have the room, a helix is the way to go. N-SCALE MAGAZINE has had several different articles on building helixes. The grade and curve radius are usually different for each helix. Don't go for the minimum radius and maximum grade possible on a helix. It will cost you in the long run. Also the KISS principal applies double strength in designing and building a helix. ------------------ Let's Go Run Trains MARK
