Abstract: This article reports a study of the flight measurement technology of a missile’s suspension flight loads. Two sets of dynamometric systems are developed which consist of a simulated missile shell and a built-in six-component strain-gage balance. Suspension flight load measurements of the missile with three suspension points and high-fineness ratio are conducted for the first time in China, and the test results are reliable and valid. The tests are performed by the dynamometric systems installed symmetrically and laterally under the clipped delta wing of an aircraft after numerous ground tests on flight circumstance adaptability, security and functionality. Direct measuring of three direction forces and moments on the center of the missile mass is realized, and measurement uncertainty is less than five percent, which is guaranteed by using the same suspension joint, the same simulant shell aerodynamic configuration and geometrical size as the real missile，the integrative structure with frame double balances, concentrated force transfer, the superposition of balance calibration center with the dynamometric system centroid, the dynamometric system calibration as a whole, etc. The test may provide an important technical approach to measuring suspension flight loads of missiles safely and accurately.

Key words: suspensions, flight load, simulant shell of missile, six-component strain-gage balance, load calibration, load measurement