Green gelled propellant highly throtteable rocket motor and gas generator technology: status and application P. Caldas Pinto, H.K. Ciezki, K.W. Naumann, J. Ramsel, P. Kröger, H. Niedermaier, M. Negri, S. Scheutzow, A. Thumann and G. Kurth Published online: 08 February 2019 DOI: 10.1051/eucass/201911091