A Ram Air Turbine (RAT) is commonly found on modern aircraft – both military and civilian -- and is used only in emergency situations. In the event of the loss of primary and auxiliary power sources, the RAT will be deployed to power vital systems of the aircraft such as flight controls, hydraulics, and instrumentation.
The AIRES Ram Air Turbine featured in this review is designed for the 1/48 Tamiya F-4B Phantom II. For review purposes, I used a spare fuselage of this kit.
In terms of the practicality of using this accessory with your Tamiya F-4B Phantom II build, you would want to use it if your intention is to pose the plane in maintenance mode. This is due to the fact that the RAT would only be opened up for maintenance purposes while the plane is on the ground (or if there is an in-flight emergency).