The Convair NB-36
A nuclear reactor is a device used to begin a nuclear chain reaction. For this reason, it should only ever be used at nuclear power plants. In the ‘50s, someone thought that it would be a good idea to add it to an aircraft. It resulted in the Convair NB-36, a disaster in the making from the get-go. The plane was so dangerous that a team of support aircraft always followed it after takeoff. It was only flown 47 times.
The Convair NB-36
The PZL M-15 Belphegor
Designed in Poland, the PZL M-15 Belphegor was the sole mass-produced biplane in history. Made to be a crop duster, the design for it was created in 1972. In retrospect, they must have realized that it was not a good idea to make one with jet power. It was more expensive to run them than they intended.
The PZL M-15 Belphegor