Ground of hard landing criteria for middle-range planes, based on MSRP-64 board digital recorder data
According to maintenance service manual of middle-range planes inspections have to be made after the hard landing to detect possible structure failures. To fix such hard landings in exploitation there are the inspections of level of impact specific loads from information of K3-63 board recorder that already is not in production now. But the middle-range plane is equipped by the board recorder MSRP-64. But up to now the metrologicaly ground method to measure structure impact specific loads by the accelerometer of MSRP-64 is absent. Use such ground based on information of MSRP-64 hard landing criteria of middle-range plane and also methods to receive enough accurate values of landing specific loads promote to support the effectiveness of exploitation and flight safeness of such planes. The results of modeling of the work of the accelerometer of MSRP-64 during landing impact are given. The form of practically exact functional connection between landing impact values of specific loads in the plane c.g. and measured by MSRP-64. Obviously, these functions can be recommended for use to estimate the maximal landing impact structure loads on Tu-154M(B) plane without board recorder K3-63.