balance diameter
1.For the purpose of small scale helicopter rotor model test research in wind tunnel,a strain gauge rotor balance was developed to fulfill the requirement of the 2m diameter rotor model test stand.The structure of the balance was described,and the design calculation was present in this paper.It was shown by the static calibration and wind tunnel test results that the development of rotor balance was successful.
2.Big diameter woofer all application of the double woofer units extend lower limits of a resonance frequency effectively which enables the low frequency to hit force, the double midrange unit endow the mid frequency with soberness and clearness, the natural silk dome and the high-density magnet augment the upper frequency, with a better balance and timber match optimizingly.
