ELASTIC PROJECTILE PROPULSION SYSTEMS AND METHODS

摘要

An elastic projectile propulsion system deploys a plurality of springs that bias a common launching cord via a plurality of block and tackle pulleys. Each sheave of the pulley is coupled to the moveable end of a spring such that the force of each spring contributes to the energy imparted to a projectile by the launching cord without adding significant friction or inertial resistance.

主权项

1. A propulsion device, comprising:
a forward spring member having a forward spring member proximal end and a forward spring member distal end, wherein the distal end of the forward spring member connects to a first brace and the proximal end of the forward spring member connects to a distal moveable pulley block, a rearward spring member having a rearward spring member proximal end and a rearward spring member distal end, wherein the distal end of the rearward spring member connects to a proximal moveable pulley block and the proximal end of the rearward spring member connects to a second brace, at least one forward pulley coupled to the forward spring member proximal end and at least one rearward pulley connected to the rearward spring member distal end, and a launching cord engaging the forward pulley and the rearward pulley.