KitHelix™ N scale, 2 track, 17.5"/2.90%, 19.5"/2.60%, 4 turns Helix upgrade spiral direction:Clockwise is upgrade

KitHelix™ N scale, 2 track, 17.5"/2.90%, 19.5"/2.60%, 4 turns Helix upgrade spiral direction:Clockwise is upgradeThis helix rises 3 3 16" per turn and has a maximum rise of 12 3 4". Available exit points in the top loop of this helix are at the following vertical rises: 3 1 8 turns: 10 ", 3 1 4 turns: 10 3 8", 3 3 8 turns: 10 3 4", 3 1 2 turns: 11 1 8", 3 5 8 turns: 11 1 2", 3 3 4 turns: 12 ", 3 7 8 turns: 12 3 8", 4 turns: 12 3 4" Our Design: Our construction system uses alignment jigs (included in your kit), making the build faster, easier and more accurate.

This helix rises 3 1/4" per turn and has a maximum rise of 22 1/2"

5 5/8 turns: 15 "

8 turns: 24 5/8"

This helix rises 3 15/16" per turn and has a maximum rise of 15 7/8"

5 5/8 turns: 17 5/8"

8 turns: 25 1/2"

4 3/8 turns: 14 1/8"

This helix rises 2 5/8" per turn and has a maximum rise of 15 5/8"

1 5/8 turns: 4 1/2"

6 1/2 turns: 21 7/8"

7 1/2 turns: 20 5/8"

9 turns: 25 1/4"