McDonnell Douglas was the manafacturer of many good aircraft for many different uses. However, as with all aircraft manafacturers, there was a bad one. In this case, it was the XF-85 'Goblin'. The Goblin was the smallest jet fighter to have existed, measuring in at 14ft 10 inches in length and 21ft 1 inch in width. The Goblin was a 'parasite', using a bomber-type aircraft to support it into the air via a 'trapeze'. The Goblin was bad for two main reasons. Firstly, a highly skilled pilot was required to fly the aircraft and docking onto the trapeze was very difficult with the test pilot only being able to dock on THREE OUT OF THE SEVEN FLIGHTS! Secondly, better fighter jets were being ordered for the same job, pushing the XF-85 out of its tiny gap in proposed technology. However, both examples were retrieved for preservation, unlike so many other failed concepts
Enjoy!