Beginner
≈ 4 h 45 minSuggested range2 h 45 min – 7 h 30 min
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Technic · SET 9394
Jet Plane
A red jet with broad wings and a raised tail.
- Pieces
- 499
- Release year
- 2012
- Theme
- Technic
- Set number
- 9394
- LEGO recommended age
- 9+
- Archived regional retail price · US
- 49.99 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 Jet Plane?
A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.
Editorial estimate · first build
Intermediate
≈ 3 hSuggested range1 h 45 min – 5 hExperienced
≈ 2 h 15 minSuggested range1 h 15 min – 3 h 30 minBased on one person building the set for the first time, following the original instructions and using numbered bags where supplied. Includes normal piece-finding and minor adjustments; excludes long breaks, filming, dismantling and modifications. Sources may use different methods. This range is neither a statistical interval nor a limit: your build may take less or more time.
How we estimate times · sources and method
Editorial assessment: A red jet with broad wings and a raised tail. Beams and connections remain visible between red panels. A first build following the instructions, including normal piece finding; an adult may help when needed. Breaks, subsequent play and any alternative models are excluded. 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.
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Build your own story.
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How much display space does it need?
Assembled-model dimensions are not yet documented for this set. Box dimensions cannot tell you how much display space it needs.
BEYOND THE BRICKS
Did you know?
Inside the set
Long nose
The front tapers ahead of the cockpit.
LEGO sourceOpen framework
Beams and connections remain visible between red panels.
LEGO sourceBeyond the set
The stories, places and inventions behind your build.
Four forces, one balance
Weight, lift, thrust and drag act together on an aeroplane. The wings provide most of its lift, while propulsion counters air resistance.
Read the full story
Balanced forces produce constant velocity; an imbalance produces acceleration. Wings and engines therefore address different parts of the same balance, rather than performing one interchangeable job.
A balance that changes in flight
Aircraft weight includes the structure, fuel and payload. Burning fuel changes both weight and its distribution, affecting the centre of gravity.
Read the full story
NASA explains why control adjustments are needed to keep the aircraft trimmed. What feels like an uneventful journey to a passenger still involves maintaining a changing balance.
Expanded stories updated on 29 October 2026
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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Building tips from the community
Specific steps, useful checks and sticking points. Contributions appear after moderation, in their original language. Do not upload instruction pages or personal contact details.
No approved tips yet.
Sign in to contributeSET THE MOOD
A soundtrack for your build
· Selected for the subject and atmosphere
Electronic pulses and open melodies provide movement without a constant action-film crescendo. They accompany landscapes and travelling vehicles through a sense of exploration.
OUR PICK
Dive
Tycho
Rhythmic and livelyEditorial 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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