forward delta meaning

• [Computer]
  The delta which, when combined with a version, creates a child version. See change management

• The simplistic use of forward deltas delivers its worst performance for the most common case . not good
• The new wing featured a proportionately larger forward delta, with greater refinement to the wing's twist and curvature.
• The new design had numerous modifications to the wing; one change was rounding the front of the forward delta in order to eliminate the pitch-up tendency.
• Since at this point the possibility of supersonic overland flight was still considered to be an option, Lockheed also considered larger, shorter-ranged versions of the L-2000-2B . All designs weighed exactly the same, with a new tail design, changes to the fuselage length, extensions to the forward delta, increased capacity, and variations in fuel capacity.
• To increase high-speed aerodynamic efficiency, the wing's thickness was reduced to 2 . 3 %, the leading edges were made sharper, the sweep angles were changed from 80 / 60� to 85 / 62�, and substantial twist and camber were added to the forward delta; much of the rear delta was twisted upwards to allow the elevons to remain flush at Mach 3 . 0.

• "forward delta" meaning in Chinese: 正向差量