Much too expensive for such a small box.
Great set, but 80 euros! For such a small set... When it arrived, I really thought this couldn't be true... But it was! Unbelievable! Way too expensive for so little!
Retailer prices for 42057 are sorted by the latest lowest price.
Retailer pricesPrice history 42057
We check Dutch retailers every day. This graph shows the full daily-low price series we have for this set.
Daily lowest price tracked across 1 Dutch retailers. The dotted line marks LEGO's recommended retail price.
Source: daily measurement at 1 Dutch retailers, 15 Dec 2025 – 14 Feb 2026. RRP via LEGO.com.
| Date | Price | Retailer | Stock |
|---|---|---|---|
| €69,95 | Bol.com | In stock | |
| €69,95 | Bol.com | In stock | |
| €69,95 | Bol.com | In stock | |
| €79,95 | Bol.com | In stock | |
| €79,95 | Bol.com | In stock | |
| €79,95 | Bol.com | In stock | |
| €59,95 | Bol.com | In stock | |
| €65,25 | Bol.com | In stock | |
| €65,25 | Bol.com | In stock | |
| €67,75 | Bol.com | In stock | |
| €59,95 | Bol.com | In stock | |
| €59,95 | Bol.com | In stock |
Calibrated forecast based on historical pricing, seasonal patterns and retailer behavior. Tuned conservatively: rather cautious than optimistic.
Signal is mixed. Small movements are more likely than a big drop.
Context for 42057, prices and availability.
Enjoy aerial adventures with this aerodynamic one-man helicopter, featuring spinning main and tail rotors, controllable tail rudder, detailed engine with moving pistons, open cockpit with detailed seat, and a white, red and black color scheme with a selection of stickers for an authentic helicopter look. This robust 2-in-1 LEGO® Technic model can be rebuilt to create an Experimental Aircraft, providing a double build-and-play experience. Both models can be built by following the free interactive, 3D digital LEGO Building Instructions app.
All about this set
Background, build experience, collector context, and buying notes in one story.
Enjoy aerial adventures with this aerodynamic one-man helicopter, featuring spinning main and tail rotors, controllable tail rudder, detailed engine with moving pistons, open cockpit with detailed seat, and a white, red and black color scheme with a selection of stickers for an authentic helicopter look. This robust 2-in-1 LEGO® Technic model can be rebuilt to create an Experimental Aircraft, providing a double build-and-play experience. Both models can be built by following the free interactive, 3D digital LEGO Building Instructions app.
When current prices are available, buying context appears here.
Instructions & specifications
Dimensions, pieces, build steps, and the official PDF building instruction.
Parts inventory
Known set data around pieces and build context.
Technic Pins
Technic Pin with Friction Ridges Lengthwise and Center Slots
Part ID 2780 · Black
Qty 15
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots
Part ID 6558 · Blue
Qty 11
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle
Part ID 11214 · Dark Bluish Gray
Qty 5
Technic Axle Pin with Friction Ridges Lengthwise
Part ID 43093 · Blue
Qty 5
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
Part ID 32054 · Black
Qty 3
Technic Pin 1/2
Part ID 4274 · Blue
Qty 3
Technic Axle Towball
Part ID 2736 · Light Bluish Gray
Qty 2
Technic Axle Pin without Friction Ridges Lengthwise
Part ID 3749 · Tan
Qty 2
Technic Pin with Friction Ridges Lengthwise and Towball
Part ID 6628 · Black
Qty 2
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle
Part ID 18651 · Black
Qty 1
Technic Pin 3/4
Part ID 32002 · Tan
Qty 1
Technic Pin Long without Friction Ridges
Part ID 32556 · Tan
Qty 1
Technic Pin with Friction Ridges Lengthwise and Center Slots
Part ID 2780 · Black · Spare
Qty 1
Technic Pin 3/4
Part ID 32002 · Tan · Spare
Qty 1
Technic Pin 1/2
Part ID 4274 · Blue · Spare
Qty 1
Technic Beams
Technic Beam 1 x 2 Thin
Part ID 41677 · Black
Qty 11
Technic Beam 1 x 5 Thin with Axle Holes on Ends
Part ID 11478 · Black
Qty 5
Technic Beam 2 x 4 L-Shape Thick
Part ID 32140 · White
Qty 4
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole
Part ID 60483 · Black
Qty 4
Technic Beam 1 x 3 Thick
Part ID 32523 · White
Qty 2
Technic Beam 1 x 11 Thick
Part ID 32525 · Black
Qty 2
Technic Beam 1 x 4 Thin with Stud Connector
Part ID 2825 · Black
Qty 1
Technic Beam 1 x 5 Thin
Part ID 32017 · Light Bluish Gray
Qty 1
Technic Beam 1 x 6 Thin
Part ID 32063 · White
Qty 1
Technic Beam 1 x 3 Thick with Black '40 1977 - 2017' and 24 Tooth Gear Print
Part ID 32523pr0001 · White
Qty 1
Technic Beam 3 x 5 L-Shape Thick
Part ID 32526 · White
Qty 1
Technic Beam 3 x 3 T-Shape Thick
Part ID 60484 · Black
Qty 1
Technic Connectors
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise
Part ID 15100 · Black
Qty 6
Technic Axle and Pin Connector Perpendicular
Part ID 6536 · White
Qty 6
Technic Pin Connector Hub with 1 Axle
Part ID 22961 · Light Bluish Gray
Qty 4
Technic Axle and Pin Connector Angled #4 - 135°
Part ID 32192 · Red
Qty 4
Technic Axle and Pin Connector Angled #2 - 180°
Part ID 32034 · Black
Qty 3
Technic Axle Connector with Axle Hole
Part ID 32039 · Black
Qty 3
Technic Axle and Pin Connector Angled #1
Part ID 32013 · White
Qty 2
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole
Part ID 32184 · Black
Qty 2
Technic Axle Connector Smooth [with x Hole + Orientation]
Part ID 59443 · Black
Qty 2
Technic Pin Connector Round 1L [Beam]
Part ID 18654 · Dark Bluish Gray
Qty 1
Technic Pin Connector Hub with 2 Axles
Part ID 27940 · Dark Bluish Gray
Qty 1
Technic Axle and Pin Connector Angled #3 - 157.5°
Part ID 32016 · Black
Qty 1
Technic Axle and Pin Connector Perpendicular Double
Part ID 32291 · Black
Qty 1
Technic Axle Connector Hub with 3 Axles at 120°
Part ID 57585 · Light Bluish Gray
Qty 1
Technic Axle and Pin Connector Perpendicular Triple
Part ID 63869 · Black
Qty 1
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes]
Part ID 87082 · Red
Qty 1
Technic Pin Connector Round 1L [Beam]
Part ID 18654 · Dark Bluish Gray · Spare
Qty 1
Technic Axles
Technic Axle 4
Part ID 3705 · Black
Qty 6
Technic Axle 2 Notched
Part ID 32062 · Red
Qty 5
Technic Axle 3
Part ID 4519 · Light Bluish Gray
Qty 4
Technic Axle 5
Part ID 32073 · Light Bluish Gray
Qty 2
Technic Axle 5.5 with Stop [Rounded Short End]
Part ID 59426 · Dark Bluish Gray
Qty 2
Technic Axle 5 with Stop
Part ID 15462 · Reddish Brown
Qty 1
Technic Axle 3 with Stop
Part ID 24316 · Reddish Brown
Qty 1
Technic Axle 6
Part ID 3706 · Black
Qty 1
Technic Axle 7
Part ID 44294 · Yellow
Qty 1
Technic Axle 4 with Stop
Part ID 87083 · Dark Bluish Gray
Qty 1
Technic Bushes
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
Part ID 32123b · Light Bluish Gray
Qty 4
Technic Bush
Part ID 3713 · Light Bluish Gray
Qty 3
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
Part ID 32123b · Light Bluish Gray · Spare
Qty 1
Technic Bush
Part ID 3713 · Light Bluish Gray · Spare
Qty 1
Technic Gears
Technic Gear 12 Tooth Double Bevel
Part ID 32270 · Black
Qty 4
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]
Part ID 18575 · Tan
Qty 3
Technic Gear 12 Tooth Bevel
Part ID 6589 · Tan
Qty 1
Technic Panels
Technic Panel Fairing #21 5L Small Smooth, Side B
Part ID 11946 · White
Qty 3
Technic Panel Fairing #22 5L Small Smooth, Side A
Part ID 11947 · White
Qty 3
Technic Panel Curved and Bent 6 x 3
Part ID 24116 · Dark Bluish Gray
Qty 1
Technic Panel Fairing # 4 Small Smooth Long, Side B
Part ID 64391 · White
Qty 1
Technic Panel Fairing # 3 Small Smooth Long, Side A
Part ID 64683 · White
Qty 1
Technic Panel Fairing #1 Small Smooth Short, Side A
Part ID 87080 · White
Qty 1
Technic Panel Fairing #2 Small Smooth Short, Side B
Part ID 87086 · White
Qty 1
Technic Steering, Suspension and Engine
Technic Engine Cylinder without Side Slots, with Bottom Slots
Part ID 2850b · Light Bluish Gray
Qty 2
Technic Engine Piston Round
Part ID 2851 · Yellow
Qty 2
Technic Engine Connecting Rod
Part ID 2852 · Light Bluish Gray
Qty 2
Technic Engine Crankshaft
Part ID 2853 · Yellow
Qty 2
Technic Link 1 x 9
Part ID 32293 · Black
Qty 2
Technic Steering Wheel Pilot's Yoke [Hollow Stud, Axle Hole with + Opening]
Part ID 18352 · Dark Bluish Gray
Qty 1
Technic Engine Crankshaft Center
Part ID 2854 · Tan
Qty 1
Wheels and Tyres
Wheel 11 x 8 with Center Groove
Part ID 42610 · Light Bluish Gray
Qty 2
Tyre 17.5 x 6 with Shallow Staggered Treads and Middle Band
Part ID 92409 · Black
Qty 2
Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring
Part ID 13971 · Light Bluish Gray
Qty 1
Tyre Offset Tread with Center Band 23 x 7
Part ID 61254 · Black
Qty 1
Tubes and Hoses
Hose Rigid 3mm D. 9L / 7.2cm
Part ID 75c09 · Black
Qty 2
Technic Special
Technic Rotor Blade Small with Hole and Axle Connector End
Part ID 99012 · Dark Bluish Gray
Qty 2
Transportation - Sea and Air
Propeller 3 Blade 9 Diameter with Pin Hole, Recessed Center
Part ID 15790 · Black
Qty 1
Stickers
Sticker Sheet for Set 42057-1
Part ID 29041 · [No Color/Any Color]
Qty 1
Large Buildable Figures
Large Figure Wing, Small
Part ID 61800 · White
Qty 1
Retailer reviews
Summarized retailer review data when available.
Great set, but 80 euros! For such a small set... When it arrived, I really thought this couldn't be true... But it was! Unbelievable! Way too expensive for so little!
Very fast delivery from US, package arrived in excellect condition ahead of time
Very good item for a fist venture into Technic Lego.
Endless fun, great design, good quality, I'm thrilled!
Gave LEGO, my 9-year-old son was very happy with it.
This is a challenge for children of this age.
As always, lego is wonderful. Just know that most of the pieces are very small and piecing them together is complicated. I struggled to help a very competent grandson.
Excellent for stimulating children's minds, the materials are of good quality and are made with precision so that nothing falls apart. The only downside is that if you don't follow the instructions, it's almost impossible to assemble for someone without experience. If you try to deviate in any way later, you'll realize that you're missing pieces, but that's not the case. The advantage is that it turns into 2 aircraft so they can build the other one if they get bored with the first.
It is a very solid set. It is simple and easy to build it for me but it is fun to build it with my kid. Even she didn't do that much but the purpose of building Lego with her is to teach her the color, different shape, number on the sticker and patient. Also, the mechanic on this little airplane is great setup. For adult, it might be simple, but for young mind, it is awesome. The gears that connecte each other and the propeller on top move will make the propeller on back move at the same time make my kid keeps asking how that happen. It is a great set. I will buy another set of Lego technic.
Bought for our grandchild, they are so happy with it and play with it constantly.
I bought this set twice, and it is excellent to combine into one larger set.
All retailer prices
Current prices, stock and discounts per retailer.
Price context
Lowest, highest and average price for this set.
This context is based on 26 price points across 0 retailers. The chart on the page remains the full interactive source.
Price forecast
Conservative baseline for the next period.
The signal is mixed. Small movements are more likely than a large drop.
FAQ & set details
Pieces, year, RRP and retailer coverage.
Quick answers about price, stock and set data.