Business jets are typically smaller than most commercial aircraft, and, accordingly, they are usually unable to achieve the same range as many commercial flights. However, several recent technological developments and efficiency increases have allowed some business aircraft to reach increasingly further destinations. Fuel tank and engine efficiency upgrades, along with aerodynamic upgrades, have improved the range of many existing families of aircraft. These upgrades have allowed some newer variants of private jets to reach over 7,500 nautical miles (8,630 miles). This range is defined as ultra-long-range in terms of the business jet industry.