An aerial vehicle includes an aerial vehicle body, and first and second rotor assemblies. The first rotor assembly includes a first hub coupled to first blades, and a first drive shaft coupled to the first hub via fastening features. The first drive shaft is configured to rotate the first hub in a first direction such that the first blades rotate in a first rotation plane. The second rotor assembly includes a second hub coupled to second blades, and a second drive shaft coupled to the second hub via fastening features. The second drive shaft is configured to rotate the second hub in a second direction opposite to the first direction, such that the second blades rotate in a second rotation plane. The first and second rotation planes are at opposite sides of the aerial vehicle body.

A method for providing host instructions to a control module of a modular assembly system is provided. A graphical programming environment including sets of first and second graphical representations is presented to a user. Each first graphical representation corresponds to a statement block comprising a parameter. Each second graphical representation corresponds to one of assembly modules associated with a property. A user is facilitated to select at least one of the first graphical representations and provide values to the parameter of each selected first graphical representation. The user is facilitated to provide values to the property of one or more of the second graphical representations. Based on at least the selected first and second graphical representations and the provided values thereof, a set of host instructions are generated. The set of host instructions are transmitted to the control module for controlling operation of the assembly modules.

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 having an outer fabric layer with an inflatable bladder inside an internal cavity of the outer fabric layer. The inflatable bladder configured to, when inflated, fill the internal cavity of the outer fabric layer and give an intended shape to the inflatable launchable toy. A foam nose cone positioned inside the internal cavity of the outer fabric layer in front of the inflatable bladder. The inflatable launchable toy having a launching strap system coupled to the outer fabric layer, the launching strap system including a launching strap and a launching hook. The launching strap having a first end portion at one end, a second end portion at an opposite end and a middle portion, where the launching hook is coupled to the first end portion of the launching strap, where the second end portion of the launching strap has a strap handle. The inflatable launchable toy configured to detachably couple to the launching elastic through the launching hook.

A mix or match toy set is disclosed wherein an airplane toy can be converted into several differently shaped units. The units are held together by using magnets in male and female connectors. The unit has interchangeable cockpit fuselage sections, jet, propeller, and fuel tank magnetic attachments and interchangeable airplane tails.

Systems, methods, and devices for propelling self-propelled movable objects are provided. In one aspect, a rotor assembly for a self-propelled movable object comprises: a hub comprising a first fastening feature; a drive shaft comprising a second fastening feature and directly coupled to the hub by a mating connection of the first and second fastening features, wherein the drive shaft is configured to cause rotation of the hub such that the mating connection of the first and second fastening features is tightened by the rotation; and a plurality of rotor blades coupled to the hub and configured to rotate therewith to generate a propulsive force.

A radio-controlled (RC) aircraft has a wing lock and disconnect mechanism. The RC aircraft has a structural member and a wing that disconnects from a fuselage. The RC aircraft has a lock mechanism, a wing structural member recess, a fuselage structural member recess, a lock recess, and an aperture. The lock mechanism couples to the wing and is adapted to fit within the lock recess of the fuselage. The wing structural member receives the structural member. The fuselage structural members recess corresponds to the wing structural member recess. The lock recess receives the lock mechanism. The wing disconnects from the fuselage by unlocking the lock mechanism. The structural member fits within the wing structural member recess and the fuselage structural member recess.

A mix or match toy set is disclosed wherein four units having a common theme have at least two or three sections. These two or three sections can be interchanged with one another. In one embodiment the units are different transportation vehicles. The units are held together by using magnets in male and female connectors.

An aircraft body and a method of making an aircraft body are provided. In one embodiment, an aircraft body may be molded from a single layer of carbon fiber stock, producing curved sections of single layer molded carbon fiber by molding pliable carbon fiber stock, and heat curing the carbon fiber stock to form a rigid, molded wing section.

A building block system may include different types of blocks. One type of block may include male and female attachment points. The male and female attachment points may have complementary shapes and sizes to enable easy interconnection. The blocks may be manufactured from a foam material, such that when male and female attachment points of different blocks are joined, a connection suitable for a degree of structural integrity is attained. A cavity may be formed in the center of each block for the placement of coins, pebbles, or other objects to add weight to the overall assembly. The building block system may also include cap pieces, in which a pair of cap pieces may be inserted into female attachment point(s) on a block, and a graphic card made of a thin material, such as cardstock, may be inserted therein.

A modular wing, adapted to be used on a flying device such as a toy airplane, drone, or other small fixed wing flying device, or form a part of a wind turbine or any other apparatus that requires a wing or blade, that is compatible with all block-based toy systems such as LEGO, DECOOL or KAZI. The modular wing is comprised of a series of modular aerodynamic surfaces that may be suitable for manufacture by a low-cost method such as molding or additive manufacturing such as 3D printing, typically but not necessarily from plastic, to form wing sub elements which, when assembled together, form a wing or blade such as an airplane wing or turbine blade. The modular wing may comprise cambered or symmetric wing shapes. The modular wing may be used in a static display model fully flying aerodynamic aircraft, sailing hydrodynamic boat, or aerodynamic functioning turbine.