http://www.boeing.com/history/boeing/images/model75_n.jpg

               This boeing plane was an unexpected success. Because of its slow speed, it is likened and used as a crop duster and a trainer military plane.

http://hifi-ring.com/uploads/posts/creative_sound-blaster_x-fi_surround.jpg

Not really an unexpected success, the sound blaster makes music clearer and the end result is very high quality music.

http://www.aerospaceweb.org/aircraft/jetliner/concorde/concorde_16.jpg

The concorde is the world's fastest commercial aircraft but due to the high operating cost, noise, high maintaining cost, the concorde was finally retired in 2003.