Take to the Skies!
With the Twin-Rotor Helicopter

Experience the world of LEGO Technic with this 145-piece set from 2014. Featuring linked spinning rotors and cool rescue styling, it's the perfect challenge for first-time builders!

Breaking News

It started with one speed champion red bull.

r/legotechnic about 4 hours ago

Lego technic asphalt btw m4 gt3 evo

r/legotechnic about 5 hours ago

LEGO Technic Candy Sorting Machine | Speedbuild & Demo

r/legotechnic about 8 hours ago
🏛 Technic
Set #42020

Twin-rotor Helicopter

The Twin-rotor Helicopter is a great entry point into the world of LEGO Technic.

🏆 Best For: Ideal for kids aged 7-12 who are new to LEGO Technic and want a simple, engaging build. ⏱ 1.5 hr build 🧩 145 pcs 🎂 Ages 7+
★★★☆☆ 3.4 from 5 reviews

A solid entry-level Technic set that's easy to build and offers good play value, though some find it too simple. Fans appreciate the 2-in-1 design, but experienced builders may find it lacking in complexity.

MSRP
$12.99
Best Price
$11.69
You Save
10% OFF
View on

📝 Our Take

The Twin-rotor Helicopter is a great entry point into the world of LEGO Technic. Its simple yet functional design introduces builders to basic Technic principles like gear mechanisms and axle connections, all while creating a fun, swooshable model.

This set is perfect for younger builders and those new to Technic. With a low piece count and straightforward instructions, it offers a rewarding building experience without being overwhelming. The 2-in-1 design also provides added play value.

Skip this if you're an experienced Technic builder looking for a complex project. The model is quite basic, consider larger Technic sets with more advanced features for a greater challenge.

✨ New
BlockTalk

Ask BlockTalk about this set

AI assistant with full set data

Powered by AI
BlockTalk
BlockTalk
Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Twin-rotor Helicopter - building tips, investment potential, comparisons, or anything else!
Try asking:
How does this set introduce basic Technic concepts? What are some of the play features of the Twin-rotor Helicopter? How does this set compare to other entry-level Technic sets? Is this set a good value for its piece count and playability?

🧱 Building Experience

🧩
145
Pieces
1.5h
Build Time
📊
Beginner
Difficulty
👤
7-14
Ages
Build Highlights:
  • Easy-to-follow instructions suitable for beginners
  • Introduction to basic Technic mechanisms like linked rotors
  • Simple gearing system that demonstrates mechanical principles
  • 2-in-1 model with alternate build instructions for added value

📈 Investment Analysis

↑ Trending up since release
C+
Investment Grade
⏳ Appreciating
The Twin-rotor Helicopter, being a smaller, retired Technic set, presents a moderate investment opportunity. Its low MSRP makes it accessible, and the rising price trend suggests increasing demand. While not a highly sought-after set, its age and the general popularity of the Technic theme could lead to gradual appreciation. However, the low piece count and lack of unique elements limit its potential for significant gains. Investors should be aware that smaller sets can be more susceptible to market fluctuations.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

📖 About This Set

Get off to a flying start with the Twin-rotor Helicopter!

Get your LEGO® Technic model building off to a flying start with the 2-in-1 Twin-rotor Helicopter. Featuring linked spinning rotors, an opening cargo door and cool rescue styling, this great model offers just the right level of challenge for first-time builders. It also has a turning front wheel for easy maneuvering on the ground. Rebuilds into a single-rotor helicopter.

  • Features linked spinning rotors, turning front wheel, opening cargo door and a cool rescue-theme design
  • Get familiar with the versatile Technic building elements
  • Taxi along the ground, spin the rotors and take off
  • Rotors are connected with gear wheels and spin together
  • 2-in-1 model: rebuilds into a single-rotor helicopter
  • Twin-rotor Helicopter measures 3” (8cm) high, 8” (22cm) long and 5” (13cm) wide

 

Compare Similar Sets

This set is a simple introduction to Technic, unlike larger, more complex sets. Consider set 42117-1 Race Plane for a similar piece count and price point but with a different building experience. The Twin-rotor Helicopter is a good choice for beginners due to its simplicity and clear instructions, while the Race Plane offers a slightly more challenging build.

📦 Full Parts Inventory - 47 unique parts • 138 total pieces

Sticker Sheet for Set 42020-1 Sticker Sheet for...
Part #: 16026 [No Color/Any Color]
Technic Pin with Friction Ridges Lengthwise and Center Slots Technic Pin with ...
Part #: 2780 Black
Technic Beam 1 x 4 Thin with Stud Connector Technic Beam 1 x ...
Part #: 2825 Light Bluish Gray
Technic Pin 3/4 Technic Pin 3/4
Part #: 32002 Tan
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Technic Pin Long ...
Part #: 32054 Light Bluish Gray
Technic Axle 2 Notched Technic Axle 2 No...
Part #: 32062 Red
Technic Axle 5 Technic Axle 5
Part #: 32073 Light Bluish Gray
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Technic Bush 1/2 ...
Part #: 32123b Light Bluish Gray
Technic Beam 2 x 4 L-Shape Thick Technic Beam 2 x ...
Part #: 32140 Black
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Technic Axle and ...
Part #: 32184 Black
Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin Technic Beam 3 x ...
Part #: 32249 Black
Technic Gear 12 Tooth Double Bevel Technic Gear 12 T...
Part #: 32270 Black
Technic Beam 1 x 5 Thick Technic Beam 1 x ...
Part #: 32316 White
Technic Beam 1 x 4 Thin Technic Beam 1 x ...
Part #: 32449 White
Technic Beam 1 x 3 Thick Technic Beam 1 x ...
Part #: 32523 Blue
Technic Beam 1 x 7 Thick Technic Beam 1 x ...
Part #: 32524 Light Bluish Gray
Technic Beam 1 x 11 Thick Technic Beam 1 x ...
Part #: 32525 Blue
Technic Beam 3 x 5 L-Shape Thick Technic Beam 3 x ...
Part #: 32526 Light Bluish Gray
Technic Pin Long without Friction Ridges Technic Pin Long ...
Part #: 32556 Tan
Technic Pin without Friction Ridges Lengthwise Technic Pin witho...
Part #: 3673 Light Bluish Gray
Technic Axle 4 Technic Axle 4
Part #: 3705 Black
Technic Axle 8 Technic Axle 8
Part #: 3707 Black
Technic Bush Technic Bush
Part #: 3713 Light Bluish Gray
Technic Beam 1 x 9 Thick Technic Beam 1 x ...
Part #: 40490 White
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Technic Tooth 1 x...
Part #: 41669 Trans-Clear
Technic Beam 1 x 2 Thin Technic Beam 1 x ...
Part #: 41677 Blue
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Technic Axle and ...
Part #: 42003 Light Bluish Gray
Wheel 11 x 8 with Center Groove Wheel 11 x 8 with...
Part #: 42610 Light Bluish Gray
Technic Axle Pin with Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 43093 12× Blue
Technic Axle 7 Technic Axle 7
Part #: 44294 Light Bluish Gray
Technic Axle 3 Technic Axle 3
Part #: 4519 Light Bluish Gray
Tyre 14 x 6 Solid Smooth Tyre 14 x 6 Solid...
Part #: 50951 Black
Technic Axle Connector Hub with 3 Axles at 120° Technic Axle Conn...
Part #: 57585 Light Bluish Gray
Technic Axle 5.5 with Stop [Rounded Short End] Technic Axle 5.5 ...
Part #: 59426 Dark Bluish Gray
Technic Axle Connector Smooth [with x Hole + Orientation] Technic Axle Conn...
Part #: 59443 Light Bluish Gray
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Technic Beam 1 x ...
Part #: 60483 Black
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Technic Beam 1 x ...
Part #: 60483 Light Bluish Gray
Technic Axle and Pin Connector Perpendicular Triple Technic Axle and ...
Part #: 63869 Light Bluish Gray
Technic Axle and Pin Connector Perpendicular Technic Axle and ...
Part #: 6536 White
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Technic Pin Long ...
Part #: 6558 Blue
Technic Gear 12 Tooth Bevel Technic Gear 12 T...
Part #: 6589 Tan
Technic Beam 1 x 3 Thin Technic Beam 1 x ...
Part #: 6632 Black
Technic Panel Fairing #1 Small Smooth Short, Side A Technic Panel Fai...
Part #: 87080 Blue
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Technic Pin Conne...
Part #: 87082 Black
Technic Axle 4 with Stop Technic Axle 4 wi...
Part #: 87083 Dark Bluish Gray
Technic Panel Fairing #2 Small Smooth Short, Side B Technic Panel Fai...
Part #: 87086 Blue
Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes Technic Pin Conne...
Part #: 87408 Black
Technic Rotor Blade Small with Hole and Axle Connector End Technic Rotor Bla...
Part #: 99012 Dark Bluish Gray
The set includes a decent quantity of Technic pins and axles, useful for MOC builders looking to expand their collection of basic Technic elements. The dark bluish gray rotor blades could be useful for detailing smaller aircraft or spacecraft models.

🛒 Where to Buy

LEGO (UK)
✓ In Stock
£7.99
LEGO (DE)
✓ In Stock
€9.99
eBay
✓ In Stock
$11.69
Walmart
✓ In Stock
$12.34
Target
✓ In Stock
$12.99
LEGO (US)
✓ In Stock
$12.99
LEGO (CA)
✓ In Stock
$14.99
Amazon

💎 Notable Parts

Dark Bluish Gray Technic Rotor Blade Small with Hole and Axle Connector End (6x) $1.50
Black Technic Beam 1 x 3 Thin (6x) $0.30
Light Bluish Gray Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes (6x) $0.48
Est. BrickLink Part Value
$2.28

💡 MOC Potential

🚗 Small airplane or drone variations
🚗 Futuristic VTOL aircraft
🤖 Simple walking robot with rotating arms

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 7 videos
3.0 /5
Mixed
0% positive
BlockTalk AI

Overall sentiment for the LEGO Technic 42020 Twin-Rotor Helicopter is mixed, with available reviews being largely neutral. Videos consist primarily of builds and showcases, with limited detailed opinions expressed by reviewers.

Community Sentiment

Based on 7 YouTube reviews

Reddit

Not enough Reddit data

YouTube

3.0 /5
Mixed
0% positive
0
Positive
7
Mixed
0
Critical
BlockTalk AI Analysis

Overall sentiment for the LEGO Technic 42020 Twin-Rotor Helicopter is mixed, with available reviews being largely neutral. Videos consist primarily of builds and showcases, with limited detailed opinions expressed by reviewers.

What the Community Says

2 YouTube reviews
BlockTalk AI Summary

Reviews mainly consist of build videos, such as those by Lego & Technic Build'z, demonstrating the assembly process of the 42020 Twin-Rotor Helicopter. Blocks Rule provides a speed build and review aimed at younger LEGO fans.

Community Content: These reviews are from Reddit and YouTube users sharing their personal experiences. Opinions may vary.

📖 Building Instructions 4

Twin-rotor Helicopter Instructions
BI 3003/36-42020 BOOK 1/2 V29
Download PDF
Twin-rotor Helicopter Instructions
BI 3003/36-42020 BOOK 1/2 V39
Download PDF
Twin-rotor Helicopter Instructions
BI 3003/36-42020 BOOK 2/2 V29
Download PDF
Twin-rotor Helicopter Instructions
BI 3003/36- 42020 BOOK 2/2 V39
Download PDF

Charts Inventory Statistics

47
Unique Parts
138
Total Pieces
0
Minifigures
Inventory Version: 1