Beginner
≈ 1 h 15 minSuggested range45 min – 2 h
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Creator · SET 31003
Red Rotors
A red helicopter with two rotors.
- Pieces
- 145
- Release year
- 2013
- Theme
- Creator
- Set number
- 31003
- LEGO recommended age
- 6+
- Archived regional retail price · US
- 14.99 USD
Archived regional retail price in the stated market and currency. It does not establish the Italian launch price; no estimated currency conversion. Brickset ↗ · Reference checked on 22 October 2026
Official English name verified at: LEGO English archive ↗ · Checked on 26 October 2026.
TIME TO BUILD
How long does it take to build Red Rotors?
For younger children, we estimate the first illustrated setup, with adult guidance when needed. Ranges reflect building familiarity, not a child’s age or ability. Free play and learning have no completion time.
Editorial estimate · first setup
Intermediate
≈ 50 minSuggested range30 min – 1 h 20 minExperienced
≈ 35 minSuggested range21 min – 56 minFirst guided arrangement: one model for 3 in 1 sets, a small composition for creative boxes, and setup alone for expansions. Excludes play, breaks and electronic configuration. These are broad editorial estimates, not measured times or targets to meet.
How we estimate times · sources and method
Editorial assessment: A red helicopter with two rotors. The front has a small clear windscreen. Creative boxes and modular decorations refer to one first illustrated arrangement; 3 in 1 sets to the main model only, and expansions to their first setup. An adult may guide the child. Ranges reflect building familiarity, not age or development; they do not measure play, learning or a speed contest. For older sets, unnumbered bags or previously mixed pieces may prolong sorting. No verified timed build: indicative values with substantial variation.
Sources do not always specify the builder’s experience. The three experience bands are our editorial assessment, based on the complexity of the set and individual accounts where available.
- LEGO · set-specific instructions ↗
Official name, pieces, age and imagery; no timed building data.
- LEGO · set manual ↗
Document for this set number. The duration is an editorial estimate, not a LEGO timing.
Checked: 26 October 2026 · Method v1.0 · Limited reports; not a statistical average.
BUILT BY THE COMMUNITY
Yours could be the first building time.
0 reviewed solo building times.
No solo building times have been reviewed yet. You can still find editorial estimates under Suggested times.
Log your buildBuild your own story.
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Create a free account →BEYOND THE BRICKS
Did you know?
Inside the set
Tandem rotors
Two large black rotors are built above the body's ends.
LEGO sourcePale cockpit
The front has a small clear windscreen.
LEGO sourceBeyond the set
The stories, places and inventions behind your build.
Wings that move around the aircraft
Rotor blades are wings moving through the air as they turn. Their rotation generates lift even without the forward motion needed by a conventional aeroplane.
Read the full story
That difference explains much of the helicopter’s shape and operating flexibility: the rotor is central to how the aircraft stays airborne, rather than simply an oversized propeller.
Why hovering matters
Helicopters can hover, move sideways or backwards and land without a conventional runway.
Read the full story
Those abilities support mountain and sea rescues and hospital access. NASA also lists firefighting and lifting heavy objects. Different missions exploit the same advantage: reaching and remaining at places where a conventional aeroplane could not stop.
Written by HowLongToBuild · Sources are linked with each story · Checked on 26 October 2026. Historical facts and story details refer to the context described.
THE COMMUNITY’S EXPERIENCE
What was it like to build?
Three separate scores from 1 to 10. For difficulty, 1 means very easy and 10 means very difficult.
No approved ratings yet. Scores are never generated by this site or inferred from the recommended age.
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Specific steps, useful checks and sticking points. Contributions appear after moderation, in their original language. Do not upload instruction pages or personal contact details.
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Sign in to contributeSET THE MOOD
A soundtrack for your build
· Selected for the subject and atmosphere
Bright guitars and steady pulses suggest open landscapes and movement. A gentle companion from structure to surface details, with more drive than pure ambient.
OUR PICK
Dive
Tycho
Airy electronics and guitarsEditorial suggestions, not official soundtracks for the set. External services may require an account or subscription; editions and availability can vary by country. Suggest another soundtrack →
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YOUR NEXT BUILD
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Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
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Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗