Aircraft Engineering | RAT (Ram Air Turbine) - an in-flight emergency source of electrical and hydraulic power, to operate the minimum flight controls and systems necessary ... | Facebook
![aircraft design - What does the small fan do that is visible on Boeing 787 Dreamliners on landing? - Aviation Stack Exchange aircraft design - What does the small fan do that is visible on Boeing 787 Dreamliners on landing? - Aviation Stack Exchange](https://i.stack.imgur.com/xYQPP.jpg)
aircraft design - What does the small fan do that is visible on Boeing 787 Dreamliners on landing? - Aviation Stack Exchange
Aviation Toulouse on Twitter: "Did you know that during each first flight the RAT (Ram Air Turbine or emergency power system) is tested ? RAT of #A350 msn 62 of yesterday. https://t.co/TQ7NfiTnWc" /
![The RAT (Ram Air Turbine) deployed on a Boeing 787 Dreamliner. Visible by the landing gear, it is deployed in emergencies and uses the airflow to help maintain hydraulic pressure for flight The RAT (Ram Air Turbine) deployed on a Boeing 787 Dreamliner. Visible by the landing gear, it is deployed in emergencies and uses the airflow to help maintain hydraulic pressure for flight](https://preview.redd.it/08scybipwm651.jpg?auto=webp&s=1658cd40202f3a6c25cfa8c3764ce8878605bcc4)
The RAT (Ram Air Turbine) deployed on a Boeing 787 Dreamliner. Visible by the landing gear, it is deployed in emergencies and uses the airflow to help maintain hydraulic pressure for flight
![aircraft systems - Is there a maximum airspeed to deploy a ram air turbine? - Aviation Stack Exchange aircraft systems - Is there a maximum airspeed to deploy a ram air turbine? - Aviation Stack Exchange](https://i.stack.imgur.com/tGcsX.jpg)
aircraft systems - Is there a maximum airspeed to deploy a ram air turbine? - Aviation Stack Exchange
![United Airlines 2012 Boeing 787-8 N45905 c/n 34825 RAT (Ram Air Turbine) San Francisco Airport 2020. | United airlines, Boeing 787, Boeing 787 8 United Airlines 2012 Boeing 787-8 N45905 c/n 34825 RAT (Ram Air Turbine) San Francisco Airport 2020. | United airlines, Boeing 787, Boeing 787 8](https://i.pinimg.com/originals/c4/91/52/c4915260722e889b42b7f9e13f074721.jpg)