This is a training film made for pilots in which different flight conditions are simulated using various light filters in order to teach the pilot how to fly in night conditions.  Title-Day-Night Flying Training The film opens with shots of old fighter planes sitting on an airfield. The voice over says that this film is going to demonstrate day for night flying i.e. the practice whereby night-time conditions are simulated so that an instructor can go out with a pupil without the dangers of...

This is a training film made for pilots in which different flight conditions are simulated using various light filters in order to teach the pilot how to fly in night conditions.  Title-Day-Night Flying Training The film opens with shots of old fighter planes sitting on an airfield. The voice over says that this film is going to demonstrate day for night flying i.e. the practice whereby night-time conditions are simulated so that an instructor can go out with a pupil without the dangers of actually flying at night. There are lots of shots of different parts of different planes. The voice over talks about how the use of colour filters can achieve this. There is a shot of a man putting various coloured filters onto glasses to give a variety of effects. They not only give a darkened view of the world but they turn everything totally black so that the pilot would not even be able to see their flying instruments. There are shots of the man wearing glasses and then fades to him wearing sun glasses. The voice over also says that the pilot also needs to be able to see the flare paths. The next section talks about the different types of light; day light, light bulbs etc. and that things cannot be seen in some of these lights, for example a light bulb seems bright until you place it in daylight and then it disappears. Then the voice over talks about the properties of different types of light and this is followed by an image of daylight going through a prism and being split into the different colours. He talks about the blue end and the red end of the spectrum and that by using overlapping lenses in these colours that it may be a solution to the `blindfold' effect. Title-Single stage (flare path) scheme. Title-This scheme was introduced to speed up training in wartimes but it is not a normal peacetime requirement. It is shown here for its historical interest and to explain further the principles of Day-Night Flying. There is a long sequence of information and images of different coloured lenses being overlapped, in order to help explain the physics behind the properties of light and their colours. The conclusion that was reached was that by using a combination of overlapping coloured filters for the goggles and sodium light to illuminate the instruments and flare paths, you could eliminate the daylight but still see the instruments and flare paths. To illustrate a variety of experiments using sodium lights and coloured filters are carried out. They put sodium lights on during the day but use the filters and the result is a night time effect but that the lights are visible. There are goggles that can be bought and interchangeable lenses that can be put into the goggles. There are shots of a student pilot putting the goggles on and getting ready to fly during the day. There is a diagram showing how it will all work and then shots of the plane in the air. People on the ground turn sodium flare path lights on and off according to what the student has to do. Title-Two stage schemes. The voice over describes this situation as when some of the light coming into the plane is being blocked by the wind screen and some of it by the goggles. There is an explanation of what colour filters are used for this stage and highlights that the instructor can still see red or green signals coming from ground control. The voice over talks about where to get information about the schemes and explains that it's very important to constantly refer to the issued documentation or to contact the Day Night section of the Empire Flying School. Title-The End.