Boeing 720

The Boeing 720 is a shortened, lightened 707 for domestic routes: the same fuselage cross-section and the same wing, with extra leading-edge flaps to shorten the field length, and lower take-off and landing weights with less fuel. Boeing describes it as a derivative of the 707-100 series rather than a model of it, and gives it a document of its own. It was built in two forms, the turbojet 720 and the turbofan 720B. The cruise speed, cruise Mach, range, ceiling, climb rate and take-off distance are EUROCONTROL's figures for the B720 type code rather than a certificate's: a type certificate states limits and weights, not cruise performance, and the source does not distinguish sub-variants. Cabin width and height are Boeing's own, from Boeing D6-58323, 720/720B Airplane Characteristics for Airport Planning, section 2.5, page 11: interior trim to trim 140.0 in (355.6 cm), 86.3 in (219.2 cm) floor to ceiling.