Amorim Cork Solutions has announced the supply of the P50 cork-based thermal protection material for the European Space Agency's (ESA) DRACO mission. This mission, scheduled for launch in 2027, aims to record rare data on how satellites disintegrate during atmospheric reentry, representing a unique engineering challenge that requires data protection amidst an environment of intentional destruction.
DRACO Mission: Destruction for Knowledge
The DRACO mission, an acronym for (Destructive Reentry Assessment Container Object), is the first experiment of its kind aimed at the intentional and monitored disintegration of a spacecraft. The vehicle will be equipped with approximately 200 sensors and four cameras to accurately document the disintegration process. The technical dilemma lies in the fact that the vehicle is designed to crash, but the data it collects must survive to reach scientists.
This is where the 40-centimeter diameter survival capsule comes in, which will house the sensitive instruments and recorded data. While the main body of the vehicle disintegrates, this capsule must withstand the conditions long enough to transmit information before meeting its final fate. To achieve this, Amorim's P50 material was selected to form the capsule's thermal shield.
P50 Material Properties and Extreme Environment Testing
P50 is characterized as a lightweight "ablative" material that relies on the natural properties of cork, engineered to suit space environments. These materials work by absorbing heat and dissipating it through the gradual erosion of the outer layer, protecting the internal structure from the immense temperatures resulting from atmospheric friction.
The capsule's thermal system underwent extensive testing at the von Karman Institute for Fluid Dynamics (VKI) in Belgium. Researchers used plasma flows to simulate the thermal and aerodynamic conditions the capsule will actually encounter. Experts at the institute confirmed that the P50 material proved highly efficient as a strong and reliable insulator, in addition to being a commercially available material with predictable thermal behavior.
What Changes Practically in Spacecraft Design?
This mission represents a pivotal part of the European Space Agency's strategy known as "Zero Debris," which aims to reduce space debris in Earth and lunar orbits by 2030. By understanding how materials disintegrate in the atmosphere, engineers can in the future:
- Improve reentry models: Develop more accurate simulation software that predicts where and how satellite parts will burn up.
- Design for Demise: Build satellites with materials and designs that ensure they burn up completely in the atmosphere, reducing the risk of debris falling on inhabited areas.
- Enhance space sustainability: Reduce the number of abandoned objects in orbit by facilitating safe disposal processes.
The use of a natural material like cork in one of the most complex space missions highlights the trend toward integrating sustainable solutions with advanced technologies, as the inherent thermal properties of cork provide protection that some synthetic materials cannot provide with the same weight and efficiency.