LEGO SET 412402 - Alternate build| Helicopter
Unlocking New Creations with Set 412402-1
The LEGO Technic Helicopter (412402-1) isn’t just a rotorcraft—you’ve got a treasure trove of beams, gears, panels and connectors that can transform into machines and vehicles you never imagined. Because Technic elements are so versatile, builders have re-imagined this set into everything from construction cranes to racing trikes. Below, we’ll walk through three standout Alternate Builds that use only parts from the helicopter, then dive into Partial Alternate Builds, Modifications, and even a fun Polybag creation.
True Alternate Builds (No Extra Parts)
These three machines can be built solely from the pieces in 412402-1—no extra bricks required!
412402 Tower Crane
A towering construction crane with full rotation and adjustable boom—perfect for setting cargo into place on your Technic building site.
412402 Plane
A sleek monoplane design that swaps rotors for fixed wings, complete with functioning flaps and landing gear.
412402 Super S-Trike
An agile three-wheeler with a sporty stance and realistic steering linked through the set’s original mechanical systems.
Partial Alternate Builds (Some Extras Needed)
By combining helicopter parts with one or two other Technic sets, builders have crafted specialized farm and aerial machines:
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Pasture Aerator for Single-Axle Tractor #7 by Larsagri
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Pasture Harrow for Single-Axle Tractor #17 by Larsagri
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Windrower for Single-Axle Tractor #20 by Larsagri
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Weed Brush for Single-Axle Tractor #19 by Larsagri
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412402 Double Helicopter by TwórcaKlocków
Each adds a fresh function—tilling, harvesting or even doubling up your rotor power.
Modifications & Polybag Builds
These creative tweaks and minis lean on the helicopter’s core parts plus minimal extras:
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412402 Mod by Legobober
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Cargo Helicopter Polybag by Viernes
The mod refines the original chopper design, while the polybag turns it into a compact cargo lifter.
All Alternate Models
Below you’ll find every model from the PDF, in the order they appear. Click the image to view the MOC page, see full build photos, parts lists, and download instructions.
412402 Tower Crane
By Legobober
Get the instructions: https://rebrickable.com/mocs/MOC-194442/Legobober/412402-tower-crane/
412402 Plane
By JusTiCe8
Get the instructions: https://rebrickable.com/mocs/MOC-218740/JusTiCe8/412402-plane/
412402 Super S-Trike
By JusTiCe8
Get the instructions: https://rebrickable.com/mocs/MOC-219007/JusTiCe8/412402-super-s-trike/
Pasture Aerator for Single-Axle Tractor #7
By Larsagri
Get the instructions: https://rebrickable.com/mocs/MOC-203434/Larsagri/pasture-aerator-for-single-axle-tractor-7/
Pasture Harrow for Single-Axle Tractor #17
By Larsagri
Get the instructions: https://rebrickable.com/mocs/MOC-204463/Larsagri/pasture-harrow-for-single-axle-tractor-17/
Windrower for Single-Axle Tractor #20
By Larsagri
Get the instructions: https://rebrickable.com/mocs/MOC-204544/Larsagri/windrower-for-single-axle-tractor-20/
Weed Brush for Single-Axle Tractor #19
By Larsagri
Get the instructions: https://rebrickable.com/mocs/MOC-204543/Larsagri/weed-brush-for-single-axle-tractor-19/
412402 Double Helicopter
By TwórcaKlocków
Get the instructions: https://rebrickable.com/mocs/MOC-214289/Tw%C3%B3rcaKlock%C3%B3w/412402-double-helicopter/
412402 Mod
By Legobober
Get the instructions: https://rebrickable.com/mocs/MOC-194379/Legobober/412402-mod/
Cargo Helicopter Polybag
By Viernes
Get the instructions: https://rebrickable.com/mocs/MOC-201702/Viernes/cargo-helicopter-polybag/
