The present disclosure provides a method for coating a composite structure, comprising forming a first slurry by combining a first pre-slurry composition comprising a first phosphate glass composition, with a primary flow modifier and a first carrier fluid, wherein the primary flow modifier comprises at least one of cellulose or calcium silicate; applying the first slurry on a surface of the composite structure to form a base layer; and heating the composite structure to a temperature sufficient to adhere the base layer to the composite structure.

The present disclosure provides a method for coating a composite structure, comprising forming a first slurry by combining a first pre-slurry composition comprising a first phosphate glass composition, with a primary flow modifier and a first carrier fluid, wherein the primary flow modifier comprises at least one of cellulose or calcium silicate; applying the first slurry on a surface of the composite structure to form a base layer; and heating the composite structure to a temperature sufficient to adhere the base layer to the composite structure.

A method of inspection or maintenance of a curved ferromagnetic surface using an unmanned aerial vehicle (UAV) having a releasable crawler is provided. The method includes: flying the UAV from an initial position to a pre-perching position in a vicinity of the ferromagnetic surface; autonomously perching the UAV on the ferromagnetic surface; maintaining magnetic attachment of the perched UAV to the ferromagnetic surface; releasing the crawler from the magnetically attached UAV onto the ferromagnetic surface; moving the crawler over the curved ferromagnetic surface while maintaining magnetic attachment of the released crawler to the ferromagnetic surface; inspecting or maintaining the ferromagnetic surface using the magnetically attached crawler; and re-docking the released crawler with the perched UAV.

A method of inspection or maintenance of a curved ferromagnetic surface using an unmanned aerial vehicle (UAV) having a releasable crawler is provided. The method includes: flying the UAV from an initial position to a pre-perching position in a vicinity of the ferromagnetic surface; autonomously perching the UAV on the ferromagnetic surface; maintaining magnetic attachment of the perched UAV to the ferromagnetic surface; releasing the crawler from the magnetically attached UAV onto the ferromagnetic surface; moving the crawler over the curved ferromagnetic surface while maintaining magnetic attachment of the released crawler to the ferromagnetic surface; inspecting or maintaining the ferromagnetic surface using the magnetically attached crawler; and re-docking the released crawler with the perched UAV.

A retaining clip for constraining a heat shield for use with an aircraft wheel assembly. The retaining clip includes a first end and a second end axially opposite the first end, the first end being opposite the second end along a longitudinal axis. The retaining clip further includes a first side and a second side each having a curvature forming a U-shaped cross section such that an outer edge of each of the first side and the second side extends back towards the longitudinal axis. The retaining clip further includes a migration stop defined by the first side at the first end, the migration stop extending past the outer edge of the second side and configured to interface with hooks of the heat shield to resist axial movement of the retaining clip relative to the heat shield.

In some examples, an assembly includes a rotor drive key configured to be positioned over a wheel boss defined by a wheel. A drive key body defines a trough configured to receive the wheel boss. An inner surface of the drive key body is configured to establish a conforming contact with an outer profile of the wheel boss and oppose relative motion of the rotor drive key in a radial direction of the wheel. The rotor drive key includes a tab having a tab aperture configured to receive a fastener extending in an axial direction of the wheel and engaging the wheel boss.

An innovative capsule type flying vehicle with vertical takeoff and landing, which belongs to the field of devices for air transportation, preferably used for individual transportation, but optionally can be configured for the transportation of two people, where the great inconvenience of products of the same purpose found in the state of technology is the fact that they leave the user exposed and unprotected; differently, the object of this present request consists of a propelled flying vehicle having an aerodynamic envelope and structure, shaped as an ogive capsule, manufactured using light, reliable, safe and easily controllable material, capable of taking off and landing vertically and hovering, flying and maneuvering over great distances and altitudes; consisting of a pod-shaped capsule (1) formed by a base (2), head (3), entry door (4) with a windshield (4A) and a support to fix the propulsion engine.

An innovative capsule type flying vehicle with vertical takeoff and landing, which belongs to the field of devices for air transportation, preferably used for individual transportation, but optionally can be configured for the transportation of two people, where the great inconvenience of products of the same purpose found in the state of technology is the fact that they leave the user exposed and unprotected; differently, the object of this present request consists of a propelled flying vehicle having an aerodynamic envelope and structure, shaped as an ogive capsule, manufactured using light, reliable, safe and easily controllable material, capable of taking off and landing vertically and hovering, flying and maneuvering over great distances and altitudes; consisting of a pod-shaped capsule (1) formed by a base (2), head (3), entry door (4) with a windshield (4A) and a support to fix the propulsion engine.

A heat shield assembly is disclosed. In various embodiments, the heat shield assembly defines a first circumferential side and a second circumferential side and an inboard end and an outboard end and includes a first layer defining a first surface of the heat shield assembly and having a first tab member disposed proximate the inboard end at the first circumferential side and a second tab member disposed proximate the outboard end at the first circumferential side; and a second layer defining a second surface of the heat shield assembly and having one or more first crimped portions extending along the first circumferential side and configured to engage the first tab member and the second tab member.

A heat shield assembly is disclosed. In various embodiments, the heat shield assembly defines a first circumferential side and a second circumferential side and an inboard end and an outboard end and includes a first layer defining a first surface of the heat shield assembly and having a first tab member disposed proximate the inboard end at the first circumferential side and a second tab member disposed proximate the outboard end at the first circumferential side; and a second layer defining a second surface of the heat shield assembly and having one or more first crimped portions extending along the first circumferential side and configured to engage the first tab member and the second tab member.