Relativity Networks, an Orlando-based startup focused on hollow-core fibers (HCF) developed at the nearby College of Optics ...

We are fascinated by the hybrid rocket engine which [Ben Krasnow] built and tested in his shop. It is actually using a hollow cylinder of acrylic as the fuel, with gaseous oxygen as an oxidizer.

The company, founded by Jason Eichenholz, specializes in providing fiber, including hollow-core fiber, for its clients. The funding was provided by a group of private investors. Eichenholz has ...