Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗

Technic · SET 42120

Rescue Hovercraft

A rescue hovercraft rolls on hidden wheels and moves propellers, recreating its shape without a real air cushion.

Pieces: 457
Release year: 2021
Theme: Technic
Set number: 42120
LEGO recommended age: 8+
LEGO retail price · Italy: 29.99 €

View on LEGO Italy Official building instructions

Retired from the LEGO Italy catalogue when checked on 23 October 2026. Availability can change. Check the store for the latest information.

Retail price reported by the LEGO source for the stated market. Check the store for current price and availability; this does not establish the launch price. LEGO ↗ · Reference checked on 23 October 2026

Track your build →

Official English name verified at: LEGO English catalogue ↗ · Checked on 24 October 2026.

TIME TO BUILD

How long does it take to build Rescue Hovercraft?

Individual build

A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.

Editorial model estimate · no verified measured building time

Beginner

≈ 4 h 30 minSuggested range2 h 45 min – 6 h 45 min

Intermediate

≈ 3 hSuggested range1 h 45 min – 4 h 30 min

Experienced

≈ 1 h 45 minSuggested range1 h – 2 h 45 min

Based 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

Steering, propellers and chassis need small mechanical connections. Alternative excluded. The three central durations are model-specific editorial assessments. Planning ranges extend approximately from 65% to 145%, rounded to quarter-hours; they are not measured experience-level averages or guaranteed limits.

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 Italy · Rescue Hovercraft ↗
This source documents the model’s features and components, not a timed build. No sufficiently verifiable individual building-time report has been identified for this set.
LEGO building instructions · Rescue Hovercraft ↗
Set-specific instructions checked against the set number, piece count and year. The duration is an editorial assessment based on piece count, construction type, mechanisms and detail.

Checked: 23 ottobre 2026 · Method v1.0 · Limited reports; not a statistical average.

Build your own story.

Save this set to your collection, track your progress and share your building time.

Create a free account →

BEYOND THE BRICKS

Did you know?

The model, the history, the ideas

Inside the set

A hovering effect

Hidden wheels make it appear raised during movement.

LEGO source

A second adventure

Alternative instructions rebuild a twin-engine aircraft with moving surfaces.

LEGO source

Beyond the set

The stories, places and inventions behind your build.

Across the Channel in 1959

SR-N1 crossed the Channel on 25 July 1959 with inventor Christopher Cockerell aboard.

Read the full story

SR-N1 crossed the Channel on 25 July 1959 with Cockerell, a pilot and a navigator, fifty years after Blériot’s flight. A Solent demonstration preceded it. The crossing showcased a different transport principle, travelling just above water on air beyond conventional navigation.

Science Museum

An experimental model first

Cockerell tested the principle with a small boat-tethered prototype, illustrating modelling before full-size construction.

Read the full story

Cockerell tested a balsa prototype covered in nylon or silk, powered by a model-aircraft engine and tethered to a rowing boat. Small-scale construction enabled experimentation, allowing him to observe the system before full-size construction beyond reproducing an established vehicle.

Science Museum

Expanded stories updated on 29 October 2026

Written by HowLongToBuild · Sources are linked with each story · Checked on 23 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.

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.

SET THE MOOD

A soundtrack for your build

· Selected for the subject and atmosphere

Guitar, bass and a relaxed groove accompany travelling scenes and everyday places. This adds movement without turning the session into an action sequence.

OUR PICK

The Universe Smiles Upon You

Khruangbin

Rhythmic and lively

Spotify ↗Apple Music ↗

Your listening moodChoose a different soundtrack

Editorial 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 →

Report a problem with this set →