Fan Flow Duct for X1 (Coandă Effect)

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After releasing the Fan Flow Duct models for P1S and P1P a while ago, I received a lot of feedback, many of which were requests to create a design for X1. (See my previouse Design for P1)

Theoretical Background

All existing designs are focused on how accurately or in which direction the wind blows. This design blows more air with the same fan.

How is that possible?

Have you heard of the Coandă Effect?

This is a fluid dynamics term that refers to the phenomenon in which when there is a flow of a fluid, nearby fluids stick together and are dragged along by the flow, ultimately amplifying the flow of the fluid.

The most common examples are Dyson hair dryers and fans. The wind created by the fan comes out of a thin circular ring, but by following the flow of the wind, a larger wind is generated in the center of the ring.

New Design for X1

As mentioned above, the previous model does not fit X1. The biggest difference between P1 and X1 is the presence of the lidar, but because of the lidar's position, it is very difficult to create a structure that allows sufficient outside air to be drawn in while making the left and right sides symmetrical. The rider on the right side not only reduces the length of the nozzle, but also interferes with additional air intake. (That is why the design of the duct provided as standard is also asymmetrical.)

So as an alternative, I created a design that allows sufficient outside air to be drawn in by using the front and back instead of the left and right.

The basic principle is the same as the previous design, but since the distances to the front and back fans are different, we paid attention to designing the walls of the internal partition so that the air can reach the back sufficiently.

In addition, I added several small walls to the nozzle area to ensure the accuracy of air discharge.

In addition, the front side is designed with a large outside air intake, so the characteristics of this design are clearly visible from the outside, differentiating it from other ducts.

This model was designed for the X1 in mind, but can also be installed on the P1 model.

However, I think the air supply path is a bit longer, which may be structurally disadvantageous.

To be honest, I have not tested this model yet.

This design is based on my knowledge and experience in physics and fluid dynamics, not experimental results.

I will continue to improve this model based on my testing and your feedback.

I hope this helps those who want better cooling.

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3/17/2025 update

Another model for X1(p1) uploaded after several tests.

it has almost the same shape as a stock one, but it has coanda nozzle for sure.

Print test was successful. I could see some improvements.

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Take a look my other design which make your printer look “cool”.

https://makerworld.com/en/models/824074#profileId-767514

Hope you Enjoy this model.

As always, I welcome your feedback.

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