A ram air turbine actuator release device to release a ram air turbine actuator includes a lock bolt releasably engaged to the ram air turbine actuator, a toggle comprising a toggle roller to engage the lock bolt, and a toggle pivot to couple the toggle to the ram air turbine actuator, a hydraulic toggle actuator, including a piston defining a first hydraulic chamber and a second hydraulic chamber, a solenoid valve in fluid communication with the first hydraulic chamber, and a plunger coupled to the piston, wherein a pressure differential between the first hydraulic chamber and the second hydraulic chamber displaces the plunger to rotate the toggle to disengage the toggle roller from the lock bolt.

A ram air turbine (RAT) assembly includes a gearbox that supports a gear set with a ring gear that drives a pinion gear. The gear set provides for the transmission of power from the turbine to a generator, pump or other power conversion device. A turbine shaft supports the ring gear and a pinion shaft that rotates about an axis transverse to the turbine shaft supports the pinion gear. A ratio between a face width and a diametrical pitch of the gear set is within a desired ratio that provides sufficient space for supporting bearing assemblies while providing for operation within the physical constraints and desired performance requirements of the RAT.

A power generation system includes a ram air turbine that is connected to a generator. The power generation system may be located in a pod, for example a pod for mounting on an aircraft. The ram air turbine receives air that passes through an air path through the pod, going in through an air inlet, through the turbine to turn the turbine, and out through an air outlet. The system includes a deployable flow obstruction, such as one or more airbags, that are deployable to suddenly obstruct the flow through the air path. The obstruction may be used to cut off flow (or greatly reduce flow), when overspeed of the ram air turbine is detected. The obstruction deploys (for example, airbags deploy in an air inlet of the system) to prevent continuation of the overspeed operation of the turbine, which may damage parts of the system.

An exemplary method of controlling fluid flow in a ram air turbine assembly, includes redirecting flow moving in an axial direction against the surface of a drive shaft to flow moving in a radial direction away from the drive shaft to limit flow of the fluid from a hydraulic pump to a generator.

One embodiment of the present disclosure is a unique airborne electrical power and thermal management system. Another embodiment is a unique aircraft. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for aircraft and electrical power and thermal management systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

Apparatus and methods to deploy a fluid flow channel are disclosed herein. An example apparatus includes a first loop coupled to an outside surface of a vehicle via a first fastener, a second loop coupled to the vehicle and disposed a distance from the first loop, and a flexible material having a first end coupled to the first loop and a second end coupled to the second loop, where the flexible material is to form a fluid flow channel between the first loop and the second loop.

An example terminal stud of a ram air fan connection assembly has a threaded portion extending from a head that is held within a slot of a base. The head has a sidewall that interfaces directly with the base. The sidewall has a length and a height. A ratio of the length to the height is from 2.18 to 2.35.

A wireless autopilot system includes an aircraft attachment device having a mounting plate for securement onto a flight control surface of an aircraft, and a flight control device that is hingedly connected to the aircraft attachment device. The flight control device including an airfoil that is connected to the mounting plate, and a steering tab that is connected to the trailing edge of the airfoil. A main body extends outward from the airfoil to function as an anti-flutter counterbalance. A servomotor is connected to the steering tab by an elongated rigid rod, and a controller having a wireless transceiver for communicating with an application on an externally located processor enabled device. Changes in the position of the servomotor during flight are instructed by the application, and result in a change to the orientation of the aircraft.

A ram air turbine control valve includes a sleeve, a spool, and a return housing. The sleeve defines a first exit port disposed proximate a first end of the sleeve and defines a second exit port disposed between the first exit port and the first end. The spool is radially contained within the sleeve and is movable between a first position and a second position. The return housing is coupled to the first end of the sleeve and defines a cavity that receives a biasing member that engages the spool.

A cross rod for use in a toggle mechanism including a first section, a second section and a midsection between the first section and the second section. The midsection includes a flange having a through hole. The first section has a first diameter, the second section has a second diameter, and the midsection has a third diameter. The third diameter being larger than at least one of the first diameter and the second diameter.