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Desktop Wind Tunnel Simulator

CRITICAL

MAKE AIRFLOW VISIBLE

Make Airflow Visible.

Real airflow · Real-time visualization · Desktop scale — bring aerodynamics experiments to your desk

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What is Critical?

Critical is a wind tunnel that fits on your desk. It uses an adjustable fan to generate steady airflow, paired with atomized smoke tracers and directional lighting, to make invisible air visible — watch how flow bends around models, where it separates, where vortices form. Whether for aerodynamics education, prototype testing, or curiosity-driven exploration, Critical brings professional wind-tunnel experience down to desktop scale.

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Wind

0–340 km/h continuous airflow

Light

Directional lighting to illuminate flow fields

Sound

Real-time airflow audio feedback

Fog

Atomized smoke tracers reveal flow paths

8 Core Features

From generating airflow to revealing it — everything a desktop wind tunnel should have

Variable Airflow

0–340 km/h wind speed, PWM continuous control

340 km/h

Flow Lighting

14 color presets + 8 dynamic effects to light up smoke trails

Airflow Audio

5-layer 16-bit synthesis that responds to wind speed

Audio Cast

Stream phone audio over WiFi to the speaker

Smoke Tracers

One-touch smoke lines that make flow paths visible

Round Display

240×240 HD round LCD, 6-page swipe menu

Wind
LED
Sound
Fog
Setup
About

App Control

Bluetooth pairing, full real-time control

OTA Updates

OTA firmware updates + auto-updating app

v2.1.0v2.2.0
Upgrading...

The dedicated Critical App

Bluetooth pairing, full real-time control. Adjust wind, trigger smoke, read the flow — all from your phone.

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Critical-A1B2Connect
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128km/h

Wind 60%

RGB color wheel

Preview

Camera
Gallery
🎵

Now playing

Highway Star — Deep Purple

Connected · Streaming

Firmware update

v2.1.0 → v2.2.0

72%12s remaining

Device Scan

Bluetooth scan and one-tap pairing with Critical

Android APK

Direct download v1.0.0

Google Play

Coming soon

App Store

Coming soon

Critical App v1.0.0 · Supports Android 8.0+ / iOS 14+

HardwareSpecs

Pro-grade hardware engineered for precise airflow

CategorySpecification
MCU
ESP32-S3 dual-core 240MHz, 16MB Flash, 8MB PSRAM
Display
GC9A01 1.28" round IPS LCD, 240×240, SPI 40MHz
LED Strip
WS2812B × 13 (10 main + 3 tail), 4 zones independently controlled
Fan
PWM continuous, 1000Hz, 10-bit resolution
Audio
I2S DAC, 16-bit 44.1kHz, 5-layer real-time mixing
Input
EC11 rotary encoder (PCNT 4× decoding), single/double/triple/long press
Connectivity
BLE 5.0 (control) + WiFi 2.4GHz (audio streaming)
Atomizer
GPIO on/off control
Storage
NVS + LittleFS, supports 3 custom logo slots
Updates
OTA over-the-air, dual-partition with rollback
Power
USB-C / DC 12V

What's in the box

Critical main unit × 1
Power adapter × 1
Quick start guide × 1

UseCases

From classroom to workbench — put airflow to work

Scene photo

Teaching & Demos

Turn abstract aerodynamics into something you can see. In classrooms, labs, and science exhibits, real smoke tracers show laminar flow, turbulence, separation, and vortices more vividly than any diagram.

Scene photo

Prototype Testing

Run quick aerodynamic checks on models, peripherals, architecture, or product prototypes. Compare how different shapes shed flow at desktop scale — iterate without booking a full-size tunnel.

Scene photo

Content Creation

Give science creators, reviewers, and short-video makers striking airflow visuals. Smoke tracers + directional lighting deliver a clean, lab-grade look.

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