In the sleekly aerondynamic world of aviation, it looks a bit odd, but the Boeing 747 has a hump atop it. The reason goes ...

The Boeing 737 aircraft has flat-bottomed engines as they were designed to have smaller engines and have short landing gear.

The Vickers Swallow was intended to succeed the so-called Wild Goose project and the Vickers Valiant subsonic bomber.

Aircraft are categorized by weight with one key function: to calculate how far behind the succeeding aircraft should follow.