Systems and methods of detecting launch of a model rocket are described herein. A mechanically implemented launch accelerometer may be disposed on a model rocket. The launch accelerometer may detect acceleration of the rocket by a mass of the launch accelerometer moving relative to the rocket and against a spring force based on the rocket acceleration. The mass may comprise a first electrical contact that may contact a second electrical contact when the mass is accelerated beyond a threshold, which is indicative of launch of the rocket. The contact between the first electrical contact and the second electrical contact may complete an electrical circuit. Furthermore, at least one pin may lock the mass in a position allowing the electrical circuit to remain complete.

A holding and starting device for hydro-pneumatically driven aircrafts composed of a base body carrying a flange that can be connected to it, the flange furthermore merging into a hollow cylinder portion receiving at least one sealing ring, latches pivotable about a shaft, and having a latch engagement means for a locking ring of the aircraft, and a release ring rotatably mounted on the base body, so that a release of the locking ring of the aircraft can take place. The latches have an actuating surface, which surface causes a pivoting movement of the latches when a nozzle-like neck portion of the aircraft is put on. With or at a rotation of the release ring against pretension, stop ends of the latches move into a respective associated setoff or a respective associated recess, so that the latches release the locking ring for starting.

A propeller-driven rocket has a body that is divided into multiple pieces. During the launch and climb, the body reaction to the torque of the propeller keeps the body panels pressed into their initial orientation. At the apex of flight, or a predetermined time from launch, the propeller reverses direction for short period of time. This reverses the forces on the body panels, causing them to release outward. The body panels are hinged such that they may form a rotor for an auto-rotating, controlled descent.

A throwing or catching toy includes a generally elongated spheroidal body defined as having a longitudinal axis, where a length of the body along the longitudinal axis between a front end to a back end of the body is longer than an equatorial diameter. A support is attached to the body and extends beyond the back end of the body and does not extend beyond the front end of the body. A lift-generating wing is non-movably attached to the support. A push surface is disposed near the back end of the body, where the push surface is generally perpendicular to the longitudinal axis. A horizontal stabilizer is attached to the support and disposed behind the lift-generating wing. An impact transfer surface is attached directly to the support, where the impact transfer surface is disposed within the body and fixed between the front end of the body and the support.

Systems, devices and methods for model rocketry are provided. According to some aspects, new forms of model rocket nose cones, other model rocket components, and methods for their use, are provided. A new form of reversibly-divisible nose cone is provided, including a plurality of housing sections forming an interior payload section and, in some embodiments, including a locking mechanism(s) configured to hold the plurality of housing sections together during the initial phases of flight. In some embodiments, such a locking mechanism is unlocked, and the housing sections are separated, at least in part, in an ejection phase of model rocket flight. In some embodiments, such a locking mechanism is unlocked, at least in part, by increased air resistance and tension from shock cord(s) of a model rocket. Shock cord mounting arms are provided, including eyelet(s), mounted at an angle to a trailing surface of the nose cone.

An inflatable launchable toy system comprising a launcher and an inflatable launchable toy configured to detachably couple to the launcher. The launcher having a launcher handle and a launching elastic. The inflatable launchable toy comprises an outer fabric layer that is substantially airtight. A fabric seam joins edges of the airtight fabric layer. A launching hook is attached to the fabric seam. The outer fabric layer when inflated gives an intended shape to the inflatable launchable toy. The inflatable launchable toy configured to detachably couple to the launching elastic through the launching hook.

A propeller-driven rocket has a body that is divided into multiple pieces. During the launch and climb, the body reaction to the torque of the propeller keeps the body panels pressed into their initial orientation. At the apex of flight, or a predetermined time from launch, the propeller reverses direction for short period of time. This reverses the forces on the body panels, causing them to release outward. The body panels are hinged such that they may form a rotor for an auto-rotating, controlled descent.

An archery arrow end includes a main body that has a first end and a second end. The main body defines a longitudinal axis. The archery arrow end includes a tip positioned at the first end. The tip has a blunt end. The archery arrow end includes an arrow shaft connector positioned at the second end. The arrow shaft connector is configured to be attached to an arrow shaft. The archery arrow end includes flexible wings that extend from the main body in a direction at least partially toward the second end. Each wing has a free end configured to move toward and away from the longitudinal axis.

An archery arrow end includes a main body that has a first end and a second end. The main body defines a longitudinal axis. The archery arrow end includes a tip positioned at the first end. The tip has a blunt end. The archery arrow end includes an arrow shaft connector positioned at the second end. The arrow shaft connector is configured to be attached to an arrow shaft. The archery arrow end includes flexible wings that extend from the main body in a direction at least partially toward the second end. Each wing has a free end configured to move toward and away from the longitudinal axis.

A toy arrow projectile for use with a toy projectile launching assembly is disclosed. The toy arrow projectile includes a shaft including a front end and a tail end, a pair of hook elements extending outwardly from the front end, a safety-tipped toy arrowhead attached to the front end, and arcuate fletching attached to the tail end. The pair of hook elements are configured to engage launching elements of the toy projectile launching assembly to stretch the launching elements therewith. The fletching includes arcuate fins extending along the shaft towards the front end. The arcuate fins include curved surfaces that curve outwardly from the shaft and generate spin in the toy arrow projectile during flight. The fletching includes a cross-sectional diameter having a distance that is less than the distance between the launching elements to allow passage of the toy arrow projectile through the launching elements without obstruction thereby.