A launch apparatus for launching a missile includes a launching tube extending in a longitudinal direction. The launching tube has an outlet opening at a first end. An acceleration device arranged in the region of a second end of the launching tube includes a gas generator to generate a gas mass flow, and a bag formed from a textile fabric. The bag is coupled to a diffuser of the gas generator via an end opening and inflates longitudinally by the gas mass flow generated by the gas generator to accelerate the missile. The bag has a gas permeability within a range of between 10 l dm.sup.2 min.sup.1 and 30 l dm.sup.2 min.sup.1. When inflated, a cross section of the bag alternatively or additionally tapers from the end opening to a minimal cross section along the longitudinal direction and increases in size to an end opposite the end opening.

An air gun with a barrel, provided with a bore, the bore being connected to the supply channel of the compressed medium. The supply channel is terminated with an annular distribution space arranged around the axis of the barrel, distribution channels connected to the barrel bore running from the annular distribution space towards the axis of the barrel.

An air gun with a barrel, provided with a bore, the bore being connected to the supply channel of the compressed medium. The supply channel is terminated with an annular distribution space arranged around the axis of the barrel, distribution channels connected to the barrel bore running from the annular distribution space towards the axis of the barrel.

A toy gun includes a gun body (1), a slide (2), a slide stopper (3), a return spring (4), a retainer (5), and a rotary bullet supplier (6). The slide (2) is disposed on the gun body (1) and reciprocates against the gun body (1). The slide stopper (3) is pivotedly connected to the gun body (1) and arranged correspondingly to the slide (2). The return spring (4) elastically supports between the gun body (1) and the slide stopper (3). The retainer (5) is pivotedly connected to the gun body (1). An end of the retainer (5) engages with the slide stopper (3), and another end thereof connects with a first magnetic member (51). The rotary bullet supplier (6) is received in the gun body (1) and connects with a second magnetic member (61).

A toy gun includes a gun body (1), a slide (2), a slide stopper (3), a return spring (4), a retainer (5), and a rotary bullet supplier (6). The slide (2) is disposed on the gun body (1) and reciprocates against the gun body (1). The slide stopper (3) is pivotedly connected to the gun body (1) and arranged correspondingly to the slide (2). The return spring (4) elastically supports between the gun body (1) and the slide stopper (3). The retainer (5) is pivotedly connected to the gun body (1). An end of the retainer (5) engages with the slide stopper (3), and another end thereof connects with a first magnetic member (51). The rotary bullet supplier (6) is received in the gun body (1) and connects with a second magnetic member (61).

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

A method for rapidly generating useful pressure on demand by flash-boiling a liquid within a container by the use of a super-heated object.

A method for rapidly generating useful pressure on demand by flash-boiling a liquid within a container by the use of a super-heated object.

A variable velocity pneumatic launcher including at least one chamber filled with a projectile. The launcher includes a ballast chamber filled with pressurized air selectively released to propel a projectile from the launcher's barrel. The launcher includes a firing chamber filled with ambient air and a ballast chamber filled with pressurized air. A piston rod extends between the chambers and attaches to a firing piston and a ballast piston located inside the firing chamber and ballast chamber, respectively. The rod is connected to an adjustable velocity valve which controls the amount of longitudinal movement of the rod. When the trigger is activated, a portion of the pressurized air from the ballast chamber is delivered to the firing chamber. Because the surface area of the firing piston is greater than the ballast piston's surface area, the force exerted on the firing piston is sufficient to shift or displace the ballast piston and allow pressurize air to be released into the upper chamber containing the projectile.

A variable velocity pneumatic launcher including at least one chamber filled with a projectile. The launcher includes a ballast chamber filled with pressurized air selectively released to propel a projectile from the launcher's barrel. The launcher includes a firing chamber filled with ambient air and a ballast chamber filled with pressurized air. A piston rod extends between the chambers and attaches to a firing piston and a ballast piston located inside the firing chamber and ballast chamber, respectively. The rod is connected to an adjustable velocity valve which controls the amount of longitudinal movement of the rod. When the trigger is activated, a portion of the pressurized air from the ballast chamber is delivered to the firing chamber. Because the surface area of the firing piston is greater than the ballast piston's surface area, the force exerted on the firing piston is sufficient to shift or displace the ballast piston and allow pressurize air to be released into the upper chamber containing the projectile.