Do any / many modern military aircraft have ram air turbines (RAT) and auxiliary power units (APU) or are they too much of a weight penalty? - Quora
Planes, Aviation & Aerospace - Asian Chapter - The Ram Air Turbine (RAT) is at the heart of an aircraft's emergency power system. In extremely rare instances when airplanes lose power, the
![Aviation Toulouse 在Twitter 上:"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 在Twitter 上:"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 在Twitter 上:"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 ram air turbine (RAT) automatically deploys under emergency conditions and uses the airstream flowing past the airplane's fusel… | Turbine, Aviation, Airstream The ram air turbine (RAT) automatically deploys under emergency conditions and uses the airstream flowing past the airplane's fusel… | Turbine, Aviation, Airstream](https://i.pinimg.com/originals/d2/26/8a/d2268ad0dae0e1eff3876af5e082114f.jpg)
The ram air turbine (RAT) automatically deploys under emergency conditions and uses the airstream flowing past the airplane's fusel… | Turbine, Aviation, Airstream
![Engineer airframe specialist of the Red Arrows changes a Ram Air Turbine ( RAT) jack in the aerobatic squadron's RAF hangar Stock Photo - Alamy Engineer airframe specialist of the Red Arrows changes a Ram Air Turbine ( RAT) jack in the aerobatic squadron's RAF hangar Stock Photo - Alamy](https://c8.alamy.com/comp/BJRC5B/engineer-airframe-specialist-of-the-red-arrows-changes-a-ram-air-turbine-BJRC5B.jpg)