Abstract: A preloaded disposable cylinder system for revolvers comprising a disposable cylindrical body, which is preferably 3D printed with chambers preloaded with propellant, primer, and projectile components without cartridge cases. The system includes boss pads and tapered cylinder end guideways for precise alignment, a spring-loaded center pin mechanism for secure retention, and eliminates traditional crane mechanisms and extractors. The design provides faster reload times than conventional revolvers, stronger dual-end cylinder lock-up, enhanced accuracy through improved alignment, and reduced manufacturing complexity. Compatible with existing revolver designs through minor frame modifications.

Abstract: Disclosed is a combined antenna and helicopter rotor blade. The antenna has one or more electrically non-conductive rotor blades, each having an electrical conductor positioned parallel to the major axis of a respective rotor blade. An electrical connection is provided to connect the antenna to a radio for the reception or transmission of radio waves. Also disclosed is a communications system including apparatus for the transmission or reception of radio waves. Two of the electrical conductors, having angular positions nearer to a predetermined angular position are connected via the electrical connector to the radio. The remaining conductors may either be connected to the body of the helicopter or supplied with a signal out of phase compared to that supplied to the two electrical conductors.