---
title: "SpaceX Details 15th Starship B42 Test Flight: One Engine Failed to Ignite, Propellant Depleted Early"
description: "SpaceX has published its first report on the 15th Starship B42 test flight: one engine failed to ignite and fuel ran out ahead of schedule. The company promises additional data, including the condition of the heat shield."
date: 2026-11-15T11:15:59.159Z
lang: en
url: https://xab.info/en/posts/spacex-starship-b42-15th-test-flight-report
tags: [spacex, starship, b42, test-flight, rocket, thermal-protection]
author: "Alexander Buran"
publisher: "XAB.info"
---

# SpaceX Details 15th Starship B42 Test Flight: One Engine Failed to Ignite, Propellant Depleted Early

![SpaceX Starship B42 rocket launching during a test flight against a cloudy sky background](https://xab.info/media/2026/11/15/spacex-starship-b42-15-polyot-otchet/spacex-starship-b42-15-polyot-otchet-1.webp)

## Key Points

- SpaceX published a report on the 15th test flight of Starship B42, calling the mission 'historic'
- One engine failed to start, and propellant was consumed ahead of schedule
- The company announced a series of additional reports, including data on heat shield tile conditions

SpaceX has published an official report dedicated to the 15th test flight of the reusable Starship rocket. The document, which is the first in a series of analytical materials by the company following this launch, contains technical details on exactly how the mission unfolded and what deviations from the standard scenario were recorded by engineers. According to SpaceX itself, the flight was of a «historic» nature, which underscores the significance of the 15th test run within the broader Starship development program.

### Engine Malfunction and Premature Fuel Consumption

The key issues that SpaceX did not hide in the report were two incidents. First, one of the engines failed to start in normal mode. Second, the propellant was consumed earlier than scheduled. Both facts indicate that the mission did not go entirely according to plan, yet the company characterizes the flight as historic, which is likely due to the fact that Starship B42 still completed the main part of the test program and demonstrated the operability of key systems under real flight conditions.

### What Is Known About the B42 Flight

The photographs accompanying the publication capture Starship in an active flight phase: the vehicle is tilted relative to the vertical, a characteristic plume of flame erupts from the nozzle, and two tall steel support towers of the launch complex are visible in the background. The tilt angle and trajectory shape correspond to the maneuvers that Starship performs during the ascent or return phase. Specific numerical parameters — speed, altitude, engine run time — are not disclosed in the available part of the report.

### Heat Shield and Future Reports

SpaceX explicitly points out that the published document is only the first in a series. The company promises to provide additional materials, including data on the condition of the heat shield tiles after atmospheric reentry. This block of information is traditionally considered one of the most critical for assessing Starship's reusability: the wear and tear of the thermal protection determines how many flight cycles the vehicle can withstand without major overhaul.

### Context: The 15th Flight in the Starship Program

The fifteenth test launch continues SpaceX's multi-year program to refine the largest rocket in the history of astronautics. Each subsequent flight makes adjustments to the system's design and software, and the open publication of reports — including information about malfunctions — has become a steady practice of the company, allowing external observers and the scientific community to track the dynamics of Starship's development in real time.

## Fact-Check & Sources

- [Один двигатель не запустился, топливо закончилось раньше времени: SpaceX раскрыла детали исторического полета Starship B42](https://www.ixbt.com/news/2026/11/15/odin-dvigatel-ne-zapustilsia-toplivo-zakoncilos-ranse-vremeni-spacex-raskryla-detali-istoriceskogo-poleta-starship-b42.html) - The primary source confirms the publication of the SpaceX report, the failure of one engine, premature propellant consumption, and the designation of the B42 vehicle. Numerical details are absent from the headline and available text.

## FAQ

### What happened during the 15th flight of Starship B42?

According to the SpaceX report, one of the engines failed to ignite, and propellant was consumed earlier than scheduled. Nevertheless, the company characterizes the flight as historic.

### Will additional flight data be published?

Yes, SpaceX indicates that the published report is the first in a series. In subsequent materials, the company intends to disclose, in particular, the condition of the heat shield tiles.

### What is Starship B42?

B42 is the designation of the specific Starship rocket vehicle used in the 15th test flight. It is a reusable system by SpaceX designed for deep space transport.