小吵闹风螺

制造这个的初衷是骚扰路上的骑友（并不是），由远及近的嗡嗡声向骑友宣告你的到来，狠狠喂骑友吃辣堡（大雾）。

这是一个利用骑行迎面气流驱动螺旋桨，进而带动鸣轮与定子产生脉冲声波的被动式声学装置，其核心设计灵感来源于传统风螺警报器的气流切割原理。

在实测中，当相对风速达到约20km/h时，该风螺即可开始发出清晰可闻的呜呜声。动力源采用一只8040三叶螺旋桨，用户还可通过更换不同尺寸或螺距的桨叶来调整启动速度阈值，例如换用小桨或大螺距桨可使发声所需的风速更高，从而适配不同的使用场景。

拼装该模型需要准备以下五金件：一颗m5热熔螺母，四颗M3×20mm平头螺丝用于固定端盖与定子；两颗M5×65mm内六角螺丝贯穿安装螺旋桨与鸣轮轴；另外四颗M5螺母辅助固定整体结构；此外还需两颗688型轴承（内径8mm×外径16mm×厚度5mm）以保证鸣轮与定子的同轴转动精度。所有螺纹连接处建议使用防松螺母或少量螺纹胶，防止长期振动导致松脱。

免责声明（中文）

本模型仅供学习、研究与实践流体力学及声学原理之用途。

非授权用途警示
本设计（包括但不限于鸣轮、定子、风车及组装结构）不应用于任何违反当地法律法规的场景，包括但不限于：
- 在公共道路、人员密集场所或其他可能引起恐慌、干扰公共秩序的环境中使用；
- 以任何形式替代正规警示设备（如汽车喇叭、警笛、消防警报等）。
改装与使用风险
任何对本模型的修改、组装、安装及使用行为均属于用户的个人行为。由于改装、不当使用或未能遵守安全操作规范所导致的一切直接或间接后果（包括但不限于设备损坏、人身伤害、财产损失、第三方索赔、行政处罚或刑事责任），均由相关用户自行承担。
无担保声明
本人作为模型的设计者，不对本模型的适用性、可靠性、合法性或安全性作任何明示或暗示的担保。用户须自行评估并承担使用风险。
知识产权
本模型以开源方式分享，用户可基于非商业目的进行个人打印、修改与学习。未经本人书面许可，不得将本模型或衍生版本用于商业制造及销售。

本人发布本模型的行为，不代表对任何非法或危险使用的默许、鼓励或教唆。

Disclaimer (English)

This model is provided for educational and research purposes only, specifically for the study of fluid dynamics and acoustic principles.

Unauthorized Use Prohibited
This design (including but not limited to the rotor, stator, windmill, and assembled structure) shall not be used in any scenario that violates local laws or regulations, including but not limited to:
- Installation on motor vehicles, bicycles, e-bikes, or other moving vehicles as an imitation siren or warning device;
- Use on public roads, crowded areas, or any environment that may cause panic, disturbance, or interfere with public order;
- Use as a substitute for legally approved warning devices (e.g., car horns, police sirens, fire alarms).
Modification and Usage Risks
Any modification, assembly, installation, or use of this model is the sole responsibility of the user. The designer shall not be held liable for any direct or indirect consequences (including but not limited to equipment damage, personal injury, property loss, third‑party claims, administrative penalties, or criminal liability) arising from improper use, modification, or failure to follow safety practices.
No Warranty
The designer makes no warranty, express or implied, regarding the fitness, reliability, legality, or safety of this model. Users must assess and assume all risks associated with its use.
Intellectual Property
This model is shared under an open‑source license for non‑commercial personal printing, learning, and modification. Commercial manufacturing or sale of this model or its derivatives is prohibited without the designer’s written permission.

The act of sharing this model does not imply endorsement, encouragement, or instruction for any illegal or dangerous use.

Descrição