Amir Hirsa, professor of mechanical, aerospace, and nuclear engineering, and a group of undergraduate and graduate students spent time last fall at Sanford International Airport in Florida— completing an experiment in zero gravity.

The trip featured the second parabolic flight campaign (the first was in February 2016) for the Rensselaer team, and was in support of an experiment created by the team that will be flown aboard the International Space Station (ISS) in 2019. The purpose of the ISS experiment (the hardware for which is called “Ring-Sheared Drop,” or RSD) is to study the process of proteins aggregating into amyloid fibrils, the same material that forms the waxy substance surrounding and eventually killing the neurons of those afflicted by Alzheimer’s disease. The RSD gives a unique opportunity to study amyloidogenesis at fluid interfaces, mimicking certain aspects of the physiological scenario.

Amyloid fibril formation in proteins is widely studied because of its role in diseases such as Alzheimer’s and Parkinson’s, as well as its promise for advanced materials. In addition to the intrinsically devastating effects of neurodegenerative diseases, these diseases also represent a huge monetary cost in the United States. In 2010, it was estimated that more than 14 percent of the elderly population suffers from dementia and that the cost of care was between $150 and $200 billion annually. The cost is projected to reach $400 billion by 2040.

Zero Gravity Corporation (ZERO-G), the parabolic flight provider for the November 2017 Research Campaign, uses G-FORCE ONE®, a specially modified Boeing 727 airplane. To create weightless environments, the ZERO-G pilots fly the plane in the trajectory of parabolas where in the top part of each arc scientists experience 25 to 30 seconds of weightlessness during which they perform their experiments.

The RSD project is in its fifth year; so far, the Rensselaer team has received commitments from NASA totaling nearly $1.5 million and the project has been approved for additional funding until September 2020. The hardware is expected to be on the ISS in early 2019.

In addition to Hirsa, the Rensselaer team included James Young ’12 (M.S., chemical engineering), ’13 (Ph.D., mechanical engineering), lecturer in mechanical, aerospace, and nuclear engineering; aerospace engineering juniors Sean Hurst, Leo Gallo, and Patrick McMackin; and doctoral candidate Adi Raghunandan.