Kato Unitrack · N scale · 12 pieces
Starter Oval — Kato Unitrack N scale plan
The classic first loop — R282 curves, two straights per side.
- Board
- 1,219 × 762 mm
48 × 30 in - Track footprint
- 1,060 × 564 mm
41.7 × 22.2 in, centerline - Pieces
- 12
0 turnouts - Geometry
- Closed
0 open ends
What it teaches
Eight R282-45 curves are 360° of turn — a full circle — and two S248 straights on each side stretch that circle into an oval. It closes because the two straights are the same length: an oval whose sides differ never meets, however many curves you add. This is the plan every other loop on this site is a variation of.
All twelve pieces are straights and curves, so it sits inside RailMind's free tier of sixteen in N. Kato sells both parts four to a pack, and the shopping list is exactly three packs with nothing left over.
How the eight curves and two equal straights close it →
Parts list
Grouped by the Kato part number you actually buy — a curve's left and right hands are one part. Quantities, pack sizes and prices are the ones RailMind's parts list computes for this plan.
| Kato part | Piece | Qty | Each | Sold as | Buy | Cost |
|---|---|---|---|---|---|---|
| 20-000 | S248 | 4 | $2.50 | 4-pack | 1 pack (4 pcs) | $10.00 |
| 20-110 | R282-45 | 8 | $2.50 | 4-pack | 2 packs (8 pcs) | $20.00 |
| Estimated total, per piece | $30.00 | |||||
| Buying whole packs — 3 packs | $30.00 | |||||
Approximate US retail per piece — Kato sells most track in packs, and street prices vary. Use as a planning estimate. The per-piece total is what the pieces cost; the whole-pack total is what you pay at the counter when a pack leaves spares.
Build it
RailMind ships this plan in its example gallery. Open it, edit it, and print it at true size — tiled across Letter or A4 with registration marks — to lay the track over. The parts list above is the one it produces, and it will check it against the track you already own.
iPad only · iPadOS 18 or later · free to build a starter layout, one US$29.99 purchase to unlock every piece.