Robotics Invention System, Version 1.5
9747-1 Mindstorms 1999 731 parts 2.8% repair risk Intermediate
LEGO RCX 9747-1 Robotics Invention System, Version 1.5 focuses on Robotics Invention System as a buildable character or creature. Recognition comes from pose, face, silhouette and details that carry the subject's personality. That gives the model presence on the shelf.
Parts Inventory
| Part | Qty | LEGO price each |
|---|---|---|
 Tyre 30 x 10.5 Offset Tread 2346 | 4× | Check price → View |
 Wedge Plate 3 x 6 Cut Corners 2419 | 2× | €0,29 |
 Plate 2 x 2 Corner 2420 | 8× | Check price → View |
![Plate Round 2 x 2 with Rounded Bottom [Boat Stud]](https://cdn.rebrickable.com/media/parts/elements/4278359.jpg) Plate Round 2 x 2 with Rounded Bottom [Boat Stud] 2654 | 2× | €0,07 |
![Technic Brick 1 x 10 [9 Pin Holes]](https://cdn.rebrickable.com/media/parts/elements/273026.jpg) Technic Brick 1 x 10 [9 Pin Holes] 2730 | 8× | €0,48 |
 Technic Pin with Friction Ridges Lengthwise and Center Slots 2780 | 25× | Check price → View |
 Technic Wedge Belt Wheel Tire 2815 | 2× | €0,38 |
 Plate Special 2 x 2 with 2 Pin Holes 2817 | 4× | Check price → View |
 Technic Beam 1 x 4 Thin with Stud Connector 2825 | 2× | Check price → View |
 Technic Engine Crankshaft Center 2854 | 2× | Check price → View |
 Tyre 81.6 x 15 Motorcycle 2902 | 4× | Check price → View |
 Wheel 61.6 x 13.6 Motorcycle 2903 | 4× | Check price → View |
Repairability
Can you fix Robotics Invention System, Version 1.5 if a piece goes missing?
4 of the 145 part+color combinations in this set appear in 3 or fewer sets ever made. Lose one of those and a replacement is very hard to find.
Theme average
8.4%
All sets
6.7%
Hardest to replace
More Mindstorms sets
Browse more LEGO Mindstorms sets related to Robotics Invention System, Version 1.5, including models from 1999 and other sets in the same theme.
Build DNA
Parts inventory insights for Robotics Invention System, Version 1.5
731 pieces puts this build +59% against the average Mindstorms set and +289% against the average 1999 release.
Vs average Mindstorms set
Average Mindstorms set: 461 pieces across 33 other sets.
Vs average 1999 set
Average 1999 set: 188 pieces across 144 other sets.
Color profile
Dominant color
Black
Unique parts
0.5 pieces per unique type
Repeat factor
Average pieces per unique type.
Most used part
Technic Bush
41xResults are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.
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