Twin-rotor Helicopter (42020): parts list and STL files

Set 42020, Twin-rotor Helicopter, from 2014, has 145 pieces in 55 kinds of part and colour. Here is every part, with the ones you can 3D print at home and the ones to buy.

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Free: an STL file for every part you can print, the parts list and a BrickLink shopping list for the rest. Pro adds print-ready plates for a 256 mm bed and our printing guide. About ProYour Pro includes the print-ready plates.

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Twin-rotor Helicopter, built (3D picture) — What it looks like built. A 3D picture, not a photo, made from the LDraw model by Florent Faramond (CC BY 2.0).

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134to print

11to buy

7spares

55kinds

134 to print, 11 to buy, 7 spares. Print: plain bricks, plates and beams you can make on a home 3D printer. Buy: clear, printed, rubber, electric and very thin parts, which are better ordered. Spares are the extras in the box.

Every part in set 42020

Parts in set 42020, Twin-rotor Helicopter
Colour	Part	Qty	Print or buy
Blue	43093 Axle Pin with Friction Ridges Lengthwise	12	Print
Black	3705 Axle 4	6	Print
Light Bluish Gray	42003 Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	6	Print
Blue	6558 Pin Long with Friction Ridges Lengthwise, 2 Center Slots	6	Print
Black	6632 Beam 1 x 3 Thin	6	Print
Dark Bluish Gray	99012 Rotor Blade Small with Hole and Axle Connector End	6	Print
Black	2780 Pin with Friction Ridges Lengthwise and Center Slots	5	Print
Light Bluish Gray	32054 Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	5	Print
Red	32062 Axle 2 Notched	5	Print
Tan	32002 Pin 3/4	4	Print
Light Bluish Gray	32123b Bush 1/2 Smooth with Axle Hole Semi-Reduced	4	Print
Black	32140 Beam 2 x 4 L-Shape Thick	4	Print
Black	32184 Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	4	Print
Light Bluish Gray	32526 Beam 3 x 5 L-Shape Thick	4	Print
Light Bluish Gray	3713 Bush	4	Print
Light Bluish Gray	59443 Axle Connector Smooth [with x Hole + Orientation]	4	Print
Light Bluish Gray	32073 Axle 5	3	Print
White	6536 Axle and Pin Connector Perpendicular	3	Print
Light Bluish Gray	2825 Beam 1 x 4 Thin with Stud Connector	2	Print
Black	32249 Beam 3 x 3 L-Shape with Quarter Ellipse Thin	2	Print
Black	32270 Gear 12 Tooth Double Bevel	2	Print
White	32449 Beam 1 x 4 Thin	2	Print
Blue	32523 Beam 1 x 3 Thick	2	Print
Light Bluish Gray	32524 Beam 1 x 7 Thick	2	Print
Blue	32525 Beam 1 x 11 Thick	2	Print
Light Bluish Gray	3673 Pin without Friction Ridges Lengthwise	2	Print
White	40490 Beam 1 x 9 Thick	2	Print
Blue	41677 Beam 1 x 2 Thin	2	Print
Light Bluish Gray	57585 Axle Connector Hub with 3 Axles at 120°	2	Print
Dark Bluish Gray	59426 Axle 5.5 with Stop [Rounded Short End]	2	Print
Light Bluish Gray	60483 Beam 1 x 2 Thick with Pin Hole and Axle Hole	2	Print
Tan	6589 Gear 12 Tooth Bevel	2	Print
Black	87082 Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes]	2	Print
Dark Bluish Gray	87083 Axle 4 with Stop	2	Print
Black	87408 Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes	2	Print
White	32316 Beam 1 x 5 Thick	1	Print
Tan	32556 Pin Long without Friction Ridges	1	Print
Black	3707 Axle 8	1	Print
Light Bluish Gray	44294 Axle 7	1	Print
Light Bluish Gray	4519 Axle 3	1	Print
Black	60483 Beam 1 x 2 Thick with Pin Hole and Axle Hole	1	Print
Light Bluish Gray	63869 Axle and Pin Connector Perpendicular Triple	1	Print
Blue	87080 Panel Fairing #1 Small Smooth Short, Side A	1	Print
Blue	87086 Panel Fairing #2 Small Smooth Short, Side B	1	Print
Black	2780 Pin with Friction Ridges Lengthwise and Center Slots	1 spare	Print
Tan	32002 Pin 3/4	1 spare	Print
Light Bluish Gray	32123b Bush 1/2 Smooth with Axle Hole Semi-Reduced	1 spare	Print
Light Bluish Gray	3673 Pin without Friction Ridges Lengthwise	1 spare	Print
Light Bluish Gray	3713 Bush	1 spare	Print
Tan	6589 Gear 12 Tooth Bevel	1 spare	Print
Light Bluish Gray	42610 Wheel 11 x 8 with Center Groove	4	Buy
Black	50951 Tyre 14 x 6 Solid Smooth	4	Buy
Trans-Clear	41669 Tooth 1 x 3 with Axle Hole [Rounded Underside]	2	Buy
[No Color/Any Color]	16026 Sticker Sheet for Set 42020-1	1	Buy
Black	50951 Tyre 14 x 6 Solid Smooth	1 spare	Buy

Print set 42020 at home

The set tool makes an STL file for each of the 134 printable pieces, sorted by colour, plus a shopping list for the 11 to buy. Free, no account, and it runs on your own phone or computer.

Get the free print files

Pro adds print-ready plates for a 256 mm bed. About Pro

Parts data: Rebrickable, and it can differ slightly from your box. Part shapes: LDraw Parts Library (CC BY 4.0). Browse all sets. Independent project, not sponsored, authorised or endorsed by any brick company.