I’ve been inspired by watching ‘Sink The Bismarck’, an ancient movie in which biplanes contribute to the defeat of Nazism.
There aren’t many modern aircraft with this configuration…mostly because adding wings doesn’t work well in high speed flight.
In an application where strength and manoeuvrability are important (such as training) I can see a return to biplanes occurring, especially using modern materials.
Today’s invention is therefore a biplane whose upper wing can be detached in an emergency and which acts as a hang glider -to save the pilot in an emergency. This can be better than a parachute, because it can operate even when deployed at very low altitude.
This might be applied to high-wing monoplanes, but their extra speed might make things more difficult (to say nothing of fitting planes with a single, pilot-removable wing unit).
