Despite a seemingly smooth launch, three Yunyao-1 weather satellites (Yunyao-1 15, 16 and 17) did not reach orbit after the Hyperbola 1 (SQX-1) experienced a fourth stage failure, Chinese authorities have disclosed.
An upgraded version of the Hyperbola 1 (SQX-1) four stage solid propellant rocket lifted off from the Jiuquan launch site in China at 2341 GMT on 10 July. The three satellites aboard were to be operated by manufacturer Chang Guang Satellite Technology Co Ltd (CGSTL), on behalf of the satellites’ owner Tianjin Yunyao Aerospace Technology Co Ltd.
Hyperbola-1 (SQX-1) Upgraded was launched on 10 July 2024 but all did not go well. Courtesy: bilibili.com
The Hyperbola-1 (SQX-1) is thought to be based on military ballistic missile technology. Officially it was the eighth launch, signified by the Y8 in its name, but, in reality, nine of the family have been launched. Two were suborbital R&D test single stage rockets (even though one carried live suborbital payloads). Of the remaining seven orbital attempts of the full rocket system (six of the upgraded version), four failed:
- The first, in February 2021, was attributed to a first stage steering fin hit by falling insulation foam.
- The second happened in August 2021 and involved a fairing separation failure.
- The third, in May 2022, was caused by a leak in the attitude control system on the second stage. The leak was caused by material blocking a fuel feed valve, which prevented it from sealing properly.
- The cause of the fourth, and most recent, failure in July this year, is as yet unknown and subject to investigation.
