How many pieces does the LEGO Twin-rotor Helicopter (42020-1) have?

The LEGO Twin-rotor Helicopter set (42020-1) contains 145 pieces. It was released in 2014 as part of the LEGO Technic theme.

How can I find missing parts for LEGO set 42020-1?

On BrickMissing you can check which parts from the LEGO Twin-rotor Helicopter (42020-1) you already own. Add your LEGO collection and we'll show exactly which of the 145 pieces you're missing and which you already have.

Can I build the LEGO Twin-rotor Helicopter with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 145 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Twin-rotor Helicopter from?

The LEGO Twin-rotor Helicopter (42020-1) belongs to the LEGO Technic theme. You can browse all Technic sets on BrickMissing to find more sets from this theme.

Twin-rotor Helicopter

42020-1 Technic 2014 145 parts 2.1% repair risk Easy

The LEGO Technic 42020-1 Twin-rotor Helicopter explores core mechanical principles within its 2014 Technic design. This model showcases linked spinning rotors, precisely connected by gear wheels, ensuring both rotors spin together during any operation. An opening cargo door supports rescue scenarios, while a turning front wheel enables ground maneuvering for realistic play. The helicopter features a clear rescue-theme design, reflected in its overall styling. As a versatile 2-in-1 model, it rebuilds into a single-rotor helicopter, providing an alternate construction. The finished Twin-rotor Helicopter measures 22 cm long, suitable for display alongside other Technic models.

42020-1

3D build progress

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Parts Inventory

🧱 145 parts

Part	Color	Qty	LEGO price each
Sticker Sheet for Set 42020-1 16026	Unknown	1×	Check price → View
Technic Pin with Friction Ridges Lengthwise and Center Slots 2780	Black	5×	Check price → View
Technic Beam 1 x 4 Thin with Stud Connector 2825	Light Bluish Gray	2×	€0,21 View at LEGO → View
Technic Pin 3/4 32002	Tan	4×	€0,08 View at LEGO → View
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] 32054	Light Bluish Gray	5×	Check price → View
Technic Axle 2 Notched 32062	Red	5×	€0,07 View at LEGO → View
Technic Axle 5 32073	Light Bluish Gray	3×	€0,11 View at LEGO → View
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced 32123b	Light Bluish Gray	4×	€0,04 View at LEGO → View
Technic Beam 2 x 4 L-Shape Thick 32140	Black	4×	€0,15 View at LEGO → View
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole 32184	Black	4×	€0,12 View at LEGO → View
Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin 32249	Black	2×	€0,33 View at LEGO → View
Technic Gear 12 Tooth Double Bevel 32270	Black	2×	€0,18 View at LEGO → View