![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" / 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" /](https://pbs.twimg.com/media/Cxk4zb4XgAABpBT.jpg)
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" /
![Jennifer Schuld on Twitter: "@Frenchpainter Boeing deploys the RAT on test flights too! This was today Air France new 787-9 landing at KPAE https://t.co/grT7tc8tHw" / Twitter Jennifer Schuld on Twitter: "@Frenchpainter Boeing deploys the RAT on test flights too! This was today Air France new 787-9 landing at KPAE https://t.co/grT7tc8tHw" / Twitter](https://pbs.twimg.com/media/CxlbMSbVIAAP1uB.jpg)
Jennifer Schuld on Twitter: "@Frenchpainter Boeing deploys the RAT on test flights too! This was today Air France new 787-9 landing at KPAE https://t.co/grT7tc8tHw" / Twitter
![Airbus 319 RAT Deployed , Ram Air Turbine use for emergency when electric power is lost on the aircraft. : r/EngineeringPorn Airbus 319 RAT Deployed , Ram Air Turbine use for emergency when electric power is lost on the aircraft. : r/EngineeringPorn](https://external-preview.redd.it/VbCQzc6zbVFNYu4GiS1irdalOe-UWNeXmGfTT-QaKMg.png?format=pjpg&auto=webp&s=77dc3624bafa21865d45cbc2e7871c4c6817de6a)
Airbus 319 RAT Deployed , Ram Air Turbine use for emergency when electric power is lost on the aircraft. : r/EngineeringPorn
![News | Collins Aerospace opens $18M Ram Air Turbine wind tunnel test facility in Rockford, IL | Collins Aerospace News | Collins Aerospace opens $18M Ram Air Turbine wind tunnel test facility in Rockford, IL | Collins Aerospace](https://prd-sc101-cdn.rtx.com/-/media/ca/newsroom/images/2022/power-and-controls/rat.jpg?h=1080&iar=0&w=1920&rev=69892c0347754ad5826798e933dde795&hash=A7E1CE34D7C1BC69DCFFEDF2A97117F6)
News | Collins Aerospace opens $18M Ram Air Turbine wind tunnel test facility in Rockford, IL | Collins Aerospace
![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)