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NTT DOCOMO’s balloon drone moves by using ultrasonic-vibration modules to push air, rather than spinning propellers. A helium-filled balloon provides lift; 48 small air-pumping modules around a carbon frame provide directional thrust. DOCOMO designed it for quieter, safer movement in crowded indoor spaces.

How the balloon drone moves

The helium balloon keeps the blimp-style drone afloat, but buoyancy alone does not make it travel in a chosen direction. As DOCOMO’s Technical Journal explains, the balloon itself floats and needs a separate propulsive force to move through the air.

That force comes from 48 microblowers mounted around a carbon frame. Each microblower contains a piezoelectric device. An alternating-current signal makes the device vibrate minutely, ejecting air and generating thrust. By controlling the modules, the drone can move forward, backward, left, right, and up or down. The journal identifies the microblower as an air pump marketed by Murata Manufacturing.

Why use ultrasonic propulsion instead of blades?

DOCOMO’s main design goal was safer flight around people indoors. Conventional propellers can hurt someone or damage an object if they make contact. The company said its ultrasonic-vibration modules are safe to touch and produce little noise. In its May 17, 2019 announcement, DOCOMO said that contact with its blimp drone presents no danger.

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That trade-off suits settings such as event venues, concert halls, and commercial facilities, where a drone may need to pass near visitors. It does not mean the craft is suitable for every task: DOCOMO’s published specifications describe a slow-moving platform, not a fast aerial vehicle.

Published size, speed, and flight time

In 2019, DOCOMO published the following specifications for the original prototype:

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  • 【Hand Controlled High Tech Design (Gesture Induction)】Our UFO flying drone are equipped with 360° motion sensors that detect objects for ultimate flight control and obstacle avoidance. Place both hands on both sides of the drone, swipe a hand under when the lights start to blink rapidly, and watch this LED drone perform a 360° flip, get super cool and enjoy super fun. It’s designed to work indoors as well as outdoors, with a smooth flight pattern effect.
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Specification Published value
Maximum diameter About 90 cm
Maximum speed About 20 cm/s
Continuous flight time About 1–2 hours

These are DOCOMO’s stated figures for its 2019 design, not independent benchmark results. The available materials do not provide a comparable retail product price or independent performance test.

What DOCOMO proposed using it for

The low-noise, blade-free design was intended for indoor applications, including airborne advertising, wayfinding, event entertainment, projection mapping, and camera-based monitoring or security. DOCOMO later described aerial videography as another use.

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The 2021 revision

On November 12, 2021, DOCOMO announced an updated model with a high-resolution camera, full-color LEDs, stronger propulsion, more stable flight, and control via a communications network to support systemized or automated operation. The company said it aimed to commercialize the model within the fiscal year ending March 2022. That announcement establishes a target, not that commercialization occurred; the cited materials do not confirm current sales or availability.

What happened to the project?

DOCOMO announced the original drone on April 17, 2019, and scheduled a prototype exhibition and hands-on demonstration at Niconico Chokaigi 2019, held April 27–28 at Makuhari Messe. In May 2019, the company also presented the development story at ACM CHI 2019. The camera-and-LED revision followed in 2021. These announcements document a real prototype and demonstrations, but they do not establish that consumers can buy one today.

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  • Recommended for ages 8 years and up.
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Is the NTT DOCOMO balloon drone for sale?

It is best understood as a DOCOMO-developed indoor drone concept and technology platform, rather than a confirmed retail product. DOCOMO announced a commercialization target for the 2021 revision, but the cited company materials do not confirm current sales, a reseller, or a price. Anyone considering it for an event or business installation should verify availability directly with DOCOMO.

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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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