Summary

Update
At the request of many users, I've specially launched the de-identified V29 version. In the model file section, this version is marked as V29D. Initially, when designing each version, I would label the whistle with the version number to facilitate differentiation. As the versions continued to evolve, this number gradually became integrated into the design story of the whistle, becoming an indispensable part of my heart. Previously, several friends suggested that I release a version without text; recently, Fusion 360 also released a video in which they successfully removed all text identifiers from
The relevant videos of them are attached below.

The name of MakeItLoud V29 comes from the fact that it is the 29th version I designed in this challenge. It is a completely original survival whistle, which has many advantages such as being sturdy, easy to make and carry, and having a nice design. The most important goal is to ensure that its volume is loud enough - no matter what the environment is, it can easily attract the attention of others.

To test its durability, I repeatedly slammed the whistle hard on the concrete pavement and conducted impact tests with all my strength; then I let the vehicle run over it twice; finally, I soaked it in a cup of water for two hours to ensure that it would not sink to the bottom of the water and could quickly drain water and emit a loud whistle after being taken out. It turned out that the whistle could still achieve this goal perfectly.

When designing it, I aimed to make the overall appearance as simple and neat as possible, while still retaining the distinctive "whistle" shape of a whistle. To ensure that users can easily hold it even when wearing thick gloves or with cold hands, I specifically designed a slightly raised lip edge at the bottom of the whistle and added an anti-slip grip at the top. Even if you blow as hard as you can, you can still hold the whistle firmly in your mouth and control it securely. In addition, a small hole is thoughtfully provided on the back of the whistle, making it

During the design process, one of the things I particularly focused on was ensuring that this whistle could be fully printed in one go, without the need for any support structures or raft materials. I wanted every user to be able to simply print it before going on a hike or outdoor activity, carry it with them, and not have to do any additional assembly or cleaning. It should be truly "print and go"!

It's worth mentioning that this whistle is ingeniously designed with two independent air chambers inside, which can emit two slightly different tones at the same time. These two tones sometimes reinforce each other and sometimes cancel each other out, producing a sharp and penetrating sound - this unique timbre, just like the pea whistle, is not only particularly eye-catching, but also less likely to be masked by background noise in noisy environments, far superior to single-tone whistles. However, unlike the pea whistle, this whistle will not stutter even when blown with great

From the day the challenge was officially announced, I knew almost nothing about the working principle of the whistle, but I still decided to start designing and prototyping it. After countless research and experiments, and through numerous attempts and adjustments, I finally created a whistle that I was very proud of. Although it took 29 iterations to refine it, this whistle ultimately successfully achieved all the goals I had set for it.

If you want to get the most impressive sound effect, please blow it with all your might and in one go! The internationally recognized distress signal is three consecutive long blasts—this is the most classic way to express an alarm with a whistle.

I hope you can print this whistle for yourself and enjoy its unique charm to the fullest!

Print settings

Printing brand:

MakerBot

Printing model:

MakerBot Replicator 2

Is rafting equipment used?

No

Whether to use a support structure:

No

Floor height:

In the model, a layer height of 0.2mm is used, but any layer height can be used in actual applications. The specific layer height can be flexibly adjusted according to needs.

Fill density:

It is set to 100% in the model, but the filling density can also be adjusted according to actual needs. However, the higher the filling rate, the better the durability of the finished product might be.

Note:

If you choose to print without support, please place the model with the smooth side facing down. Here, I would like to express my sincerest gratitude to my dear friend James—it was he who used his own printer to print all 29 versions of the whistle for me. Thank you, James!

Customization Zone

Why did I design this whistle?

During my teenage years, I served as a lifeguard during the summer vacation many times. I remember that once, while trying to rescue two drowning victims at the same time, I was almost in danger. The situation took a turn for the worse when the two drowning victims actually joined forces to drag me underwater. Just at the critical moment, another lifeguard promptly jumped into the water to help. Although the lifeguard was not in sight at that time, he immediately came to the rescue after hearing my whistle. This experience made me deeply realize the important role of the lifeguard station and