K'nex Quadcopter Model!!!

Introduction: K'nex Quadcopter Model!!!

About: Hello! I'm Nerfrocketeer, also known as Nefrock', Nerf, or NK. I am an avid fan of Nerf wars, engineering, and animal activism (but no I don't go overboard). Thank you for A MILLION views (woah!) and making ...

     I have always had a deep fascination with multirotor drones. They look cool, sound cool, and can do plenty of awesome things! Unfortunately in order to get one you either have to be willing to spend a couple hundred dollars, or you need a vast amount of electrical and computer programming knowledge, as well as time and supplies to build one. I have always wanted a drone for myself, but having none of the above things I could not think of a way to get one.

     Until I got some K'nex.

     K'nex are the ultimate in customizable rod and connector sets, allowing you to build anything-from guns to useful household items- with a little ingenuity. Thus it was that the idea to build a multirotor drone out of K'nex came to my mind. Quite soon I had built a full-scale model of a quadcopter out of K'nex. It did not fly, but it was still a very cool thing to have.

     In this Instructable I am going to teach you how to replicate my building process, and create your own K'nex quadcopter.

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Step 1: Parts

You will need:
-12 white connectors
-24 blue connectors
-64 yellow connectors
-16 green connectors
-16 red connectors
-56 grey connectors
-4 orange connectors
-8 beige locks
-40 blue caps
-8 blue separators
-40 grey separators
-4 grey rods
-12 green bendy rods
-16 red rods
-8 blue rods
-1 yellow rod
-20 purple bendy rods
-90 white rods
-208 green rods

Step 2: Center: Base Pieces

Take a blue connector and a grey connector and slide them together as shown. Repeat to get eight pieces.

Step 3: Center: Pair Up

Separate the pieces you have made into four pairs, and connect each pair using green rods.

Step 4: Center: Corners

Connect the pairs together to make a square using red connectors and green rods. Repeat steps 2-4 to get three pieces.

Step 5: Center: Stack

Stack the three pieces. Make sure the top connections are facing inwards, while the bottom two pieces have connections facing out. Connect the pieces using green rods.

Step 6: Center: Base; Pieces

Take two grey connectors, and slide them together as shown. Repeat to get eight pieces.

Step 7: Center: Base; Pair Up

Separate the pieces into pairs, then connect the pairs using green rods.

Step 8: Center: Base; Corners

Take four red connectors, and connect them to the pairs using green rods.

Step 9: Center: Add Base

Add the base to the other three pieces as shown using green rods.

Step 10: Center: Top and Bottom

Take four white connectors, and connect them using green rods. Add a few more green rods where shown. Repeat to get two pieces.

Step 11: Center: Attaching the Top and Bottom

Attach the pieces you have just made to the top and bottom of the main piece.

Step 12: Center: Fill In

Fill in all spaces using white rods. Make sure the rods are placed exactly the same way as in the pictures!

Step 13: Center: Purple Rods

Fill in the corners using purple bendy rods.

Step 14: Center: Top "Wires"

Using green bendy rods, create a dome-like structure on the top as shown.

Step 15: Center: the "Antennas"

Take four grey rods, and add blue caps to one end. Next, insert them through the holes on the red connectors at each corner of the main piece. Then, add six grey separators and a blue cap to the top of each rod.

Step 16: Center: Check

The center of the quadcopter is complete! Check to make sure it looks like the picture!

Step 17: Arms

Take eight yellow connectors, and connect them using green rods. Then, repeat to get two pieces. Finally, connect the two pieces using green rods.

Step 18: Arms: Ends

Take two green connectors and connect them using a green rod. Next, attach them to the end of the arm.

Step 19: Arms: White Rods

Fill in spaces using white rods as shown.

Step 20: Arms: Supports

Take two grey connectors, and slide them together. Then, repeat to get two pieces. Connect the two pieces using a green rod. Finally, add a white rod and a grey separator to the bottom of each piece.

Step 21: Arms: Supports; Insert

Count down four connectors from the end of the arm without the green connectors, and insert the piece you made in the previous step. Next, add blue caps to the bottom of each white rod.

Step 22: Arms: Red Rods

Add two red rods to the grey connectors as shown.

Step 23: Arms: Front Supports

Take a red rod and attach it to a green connector. Next, add a purple bendy rod. Repeat to get two pieces.

Step 24: Arms: Front Supports: Attach

Attach the pieces you made in the previous step to the grey connectors as shown. Next, insert the purple bendy rods through the holes of the green end connectors, and add blue caps.

Step 25: Arms: Extra White Rods

Take two more white rods and attach them to the grey connectors as shown.

Step 26: Arms: Rotor Holder

Take a blue rod and attach two beige locks and an orange connector. Make sure the locks keep the orange connector from rotating! Then, add two blue separators to each end of the rod. Finally, add a second blue rod to one end of the orange connector as shown.

Step 27: Arms: Rotor Holder; Attach

Attach the rotor holder to the arm by inserting the top blue rod through the holes in the green connectors on the front support. Add blue caps to each end. Next, insert the bottom blue rod through the bottom of the arm, and add a grey separator and a blue cap.

Step 28: Arms: Rotor Holder; White Rod

Add a white rod and a grey separator to the top of the rotor holder.

Step 29: Arms: Rotor

Take a white connector, and add two green bendy rods as shown.

Step 30: Arms: Rotors; Attach

Attach the rotors to the arm by inserting the white rod on the rotor holder through the hole in the center of the white connector. Add a blue cap to the top.

Step 31: Arms: Check

One arm is now complete! Check to make sure it looks like the picture!

Step 32: Arms: Repeat

Repeat steps 17-31 to get four arms total.

Step 33: Attaching the Arms

Attach the arms to the center as shown. The bottom should be attached using green rods, while the red rods are connected at the top. Fill in any spaces with white rods, and repeat for the other three arms.

Step 34: Mounting K'nex Guns on Your Drone

If you want you can mount a small K'nex gun on the bottom of your quadcopter! Simply flip over the drone, and add a yellow rod to the bottom as shown. This rod can slide out for mounting a K'nex gun (such as my Nerf Jolt model) or can slide in to be out of the way.

Step 35: Done!

Congratulations! You have now built your very own K'nex quadcopter model! Have fun with it!


     After building this, I began to do more research about multirotor drones, and found that not only were there four-armed drones, but there were also drones with three arms (A.K.A. a tricopter).My curiosity peaked, I set out to build a model, which led me to even greater levels of creation and fun! The story will be continued in my next Instructable...

 I have only one question left: Is there any way to make this fly? If anyone can make it actually fly (with arduino and whatnot), I'll follow them and give them a patch! (If that's a good enough reward...) Of course you would need REAL rotors...

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    10 Discussions


    With the quad can you pick it up by two arms? If not then you will have to strengthen them, there should also not be much play in the arms as this will drive the flight controler a bit crazy. I would think some model glue on all joints could make it stiff enough to work as a multirotor. The motor mounts may be a bit of a chalenge though.


    4 years ago on Introduction

    I'm working on my own quadcopter model using knex, and I'm trying to make it fly using a wireless transmitter, and quadcopter rotors. The only issue is the weight. - let me know if anyone wants to find out how I'm doing this.

    Now it has four wing stem things. :O Now it just got even better. I'd love to see this 'story' all the way until it's just a huge circle with fans on it around a box. Somebody has got to make it fly. Seriously. :3


    Reply 6 years ago on Introduction

    Yeah I know! I really hope someone takes up my offer! That would be awesome, because as far as I know, no one has ever made anything of mine... :/


    Reply 6 years ago on Introduction

    My friend will definitely make your roman candle rifle if you post it (I haven't consulted with him, but I know him that well). He has some K'nex, and I could probably help him build it from the pictures, but if you posted it, it'd be nice.


    Reply 6 years ago on Introduction

    Sure! You're in luck, too, because i haven't taken it apart yet! Ill try to post it this week! If it is built could you maybe take a vid of it in action? I was unable to. Its alright if you cant though... :)


    6 years ago on Introduction

    Wow! You have done it again Nerfrock! I like the way you condense the steps so much! I will vote when this is entered! Good Job =D


    Reply 6 years ago on Introduction

    Thanks! Doing it that way makes it easier to understand and easier to make the ible ;) thanks!