Here’s a blog post on unlocking the full creative potential of LEGO 31146-1 Flatbed Truck with Helicopter—including a gallery of every alternate build from the PDF you provided:

Exploring the Creative Possibilities of LEGO 31146-1

Flatbed Truck with Helicopter
(Creator 3-in-1, 2024)

The LEGO Creator 3-in-1 series is all about versatility—and nowhere is that more true than in set 31146-1. On the surface, it gives you a flatbed truck with a detachable helicopter, but its real power lies in the parts bin: a rich mix of vehicle chassis elements, exposed grille pieces, rotor blades, and a clever array of slopes and tiles. Here are a few tips and ideas for taking your own custom builds beyond the official model:

1. Maximize Your Chassis

   • The heavy-duty truck base is perfect for any land machine with a low center of gravity. Swap the helicopter tail for a rear-mounted fan or propeller to build a hovercraft or all-terrain buggy.

   • Use the long flatbed rails to support extended trailers—think mobile command centers, pop-up cafés on wheels, or even a small mobile home.

2. Repurpose the Helicopter Bits

   • Rotor blades and helicopter cockpit pieces make for great turbines on futuristic hoverbikes or mini starships.

   • The cockpit canopy and angled windscreen are ideal for sporty roadsters or even micro-scale fighter jets.

3. Play with Scale

   • Combine the set’s 1×2 tile and grille pieces to build micro vehicles—race cars, tractors, or even tiny steamrollers—that give the impression of a bustling mini-city.

   • Invert the flatbed frame to create a raised platform for crane-style builds or an elevated maintenance platform for aircraft.

4. Mix and Match Colors

   • The red, white, and black palette can be augmented with bright 1×1 round plates and Technic pins from your parts stash to create eye-popping accents—perfect for hot rods, dragsters, or concept vehicles.

   • Swap out the truck’s wheels for larger Off-Road wheels plus suspension pieces to turn it into a rugged 4×4.

5. Think Beyond Vehicles

   • The long hinged plates on the bed can become articulated arms for a small robotic crane.

   • The helicopter’s under-carriage pieces work wonderfully as micro-scale furniture—try converting them into lounge chairs or tables in a diorama!

Gallery of Alternate Builds

1. 31146 Lawn Mower
   By Dafeld
   Get the instructions: https://rebrickable.com/mocs/MOC-170385/Dafeld/31146-lawn-mower/

2. 31146 Optimus Prime
   By Leewan
   Get the instructions: https://rebrickable.com/mocs/MOC-187000/Leewan/31146-optimus-prime/

3. 31146 Steam Train
   By BrickIntelligence
   Get the instructions: https://rebrickable.com/mocs/MOC-171221/BrickIntelligence/31146-steam-train/

4. 31146 Le Mans Prototype
   By Nequmodiva
   Get the instructions: https://rebrickable.com/mocs/MOC-177911/Nequmodiva/31146-le-mans-prototype/

5. 31146 Fire Truck
   By PeterSzabo
   Get the instructions: https://rebrickable.com/mocs/MOC-170140/PeterSzabo/31146-fire-truck/

6. 31146 Muscle Car
   By PeterSzabo
   Get the instructions: https://rebrickable.com/mocs/MOC-170812/PeterSzabo/31146-muscle-car/

7. Whirl N’ Wheel Mini Truck
   By PassengerX
   Get the instructions: https://rebrickable.com/mocs/MOC-173591/PassengerX/whirl-n-wheel-mini-truck/

8. 31146 Old School PC
   By BrickBash
   Get the instructions: https://rebrickable.com/mocs/MOC-185182/BrickBash/31146-old-school-pc/

9. 31146 Hot Rod, Go-Kart, Airplane
   By BrickIntelligence
   Get the instructions: https://rebrickable.com/mocs/MOC-169969/BrickIntelligence/31146-hot-rod-go-kart-airplane/

10. 31146 Flatbed
    By BrickBash
    Get the instructions: https://rebrickable.com/mocs/MOC-174677/BrickBash/31146-flatbed/

11. 31146 Ferry Boat
    By Lenarex
    Get the instructions: https://rebrickable.com/mocs/MOC-174596/Lenarex/31146-ferry-boat/

12. 31146 Lawn Mower
    By BrickBash
    Get the instructions: https://rebrickable.com/mocs/MOC-194711/BrickBash/31146-lawn-mower/

13. 31146 Starfighter
    By BrickIntelligence
    Get the instructions: https://rebrickable.com/mocs/MOC-171529/BrickIntelligence/31146-starfighter/

14. 31146 Truck and HotRod
    By PeterSzabo
    Get the instructions: https://rebrickable.com/mocs/MOC-169200/PeterSzabo/31146-truck-and-hotrod/

15. 31146 – BBQ Grill
    By KlintIsztvud
    Get the instructions: https://rebrickable.com/mocs/MOC-209175/KlintIsztvud/31146-bbq-grill/

16. 31146 – Mini Off-Road 4×4
    By nkende
    Get the instructions: https://rebrickable.com/mocs/MOC-205007/nkende/31146-mini-off-road-4x4/

Click here for more alternative builds and Modifications for this Lego set