Remote controlled aircraft have always been scale models of the original full size versions. The resulting planes needed a fairly large area to take off and land. Even more area was needed for flight. This separated planes from other remote control models. The planes needed to be flown outdoors.
Remote control helicopters were one answer to this problem. The helicopter needed less take off and landing space, and was able to fly in a much more confined space. It was possible to fly the remote control helicopters inside a large building such as a workshop or gymnasium. It was the ability to produce miniature components that ushered in the era of the remote control indoor airplane. The receiver was a major issue, but the advent of microcircuits allowed small and light receivers. It was now possible to fly remote control airplanes inside buildings along with helicopters. The Micro Flyer Wattage Indoor remote control Electric Airplane is an example of the genre. The controller operates off 6 AA batteries. The remote control indoor planes such as the Micro Flyer can also be used outdoors.
The ultimate expression of the remote control indoor airplane may well be the Plantraco 3.6g Butterfly. This miniature plane has a 0.4 gram Micro900 Receiver and a GB05 4mm 5:1 gearbox. This tiny and light aircraft needs a mere room at least 12 feet by 16 feet in order to operate. This is roughly the size of a good sized living room. Now, it is possible to fly remote control airplanes in your living room.