Whisper Aero has unveiled the world's quietest electric aircraft engine - the propulsion system is inaudible from 61 metres away

Companies working on electric air transport face different problems, but noise is common. The start-up Whisper Aero has proposed a solution in the form of the world's quietest engine for electric planes.

Here's What We Know

Whisper Aero has unveiled a mock-up of the propulsion system. It is called Whisper Jet. According to the developers, it is the world's quietest and most efficient engine for electric planes. It is "100 times quieter than similar engines" and its efficiency has been "increased by 20 per cent".

The start-up has already tested its development and compared it with peers. The tests took place at night in the same sound environment. As it turned out, with background noise at 30 dBA, the sound of 6" propellers cannot be heard at a distance of 61 metres.

The start-up also tested the propulsion system at a distance of 30.5 metres with its counterparts. The Whisper Jet showed the best performance. The noise level was 34.1 dBA. The Schubeler and CAMcarbon results were 44.9 / 52.1 dBA and 49.4 / 58.7 dBA respectively.

According to the developers, the Whisper Jet features a multi-band propeller design, which results in efficiency at lower revs. They also point out that the engine generates thrust instead of generating unnecessary noise.

Whisper Aero aims to sell propulsion systems and licences. The startup does not plan to sell electric planes itself, though it is working on a prototype of a 10-seat aircraft. It will be equipped with a Whisper Jet engine and will be able to reach speeds of up to 463 km/h. It has a cruising range of 322km.

Source: New Atlas