Douglas X-3 Stiletto
The Douglas X-3 Stiletto was a design for a stealthy flying shoe that could be worn for short periods of time. The idea came from the company's desire to create a lightweight, concealable shoe that could fit into the cockpit of an aircraft. The device was made from a lightweight fabric that could be worn over the foot.
A special shoe insoles with sensors would transmit information to the pilot. The Douglas X-3 Stiletto was capable of capturing data such as altitude and speed, as well as transmitting this information back to the pilot. Although the device had many advantages, it also had some significant disadvantages. For example, it required the pilot to wear heavy boots while in flight and it did not provide much protection against high G-forces. PlaneHistoria has more information about the Douglas X-3 Stiletto visit now.