Annotation: The measurement errors upon conducting flight tests for launch vehicles are evaluated by considering the interferences and uncertainties in the measurement system procedure. Formal use of this approach can lead to unpredictable consequences. More reliable evaluation of errors upon conducted measurements can be achieved if the measurement process is regarded as a procedure of successive activities for designing, manufacturing, and testing the measurement system and the rocket including measurements and their processing during the after-flight analysis of the received data. The sampling rates of the main controlled parameters are three to ten times higher than the frequency range of their changing. Therefore, it is possible to determine the characteristics of the random error components directly on the basis of registered data. The unrevealed systematic components create the basic uncertainty in the evaluation of the examined parameter’s total measurement error. To evaluate the precision and measurement accuracy of a particular launch, the article suggests specifying the preliminary data on measurement error components determined during prelaunch processing and launch. Basic structures of algorithms for evaluation of precision and measurement accuracy for certain mathematical models that form the measured parameters were considered along with the practical case when static correlation existed among the measured parameters.

Annotation: The paper presents the original test methods with simulation of axial loads nx＜＜ 1 and nx ＞＞1 and the test stands which were used on testing the Zenit-2 ILV large-sized nose fairing.

Annotation: The methodology is proposed of probabilistic assessment of fulfilment of the requirements to gas dynamic parameters in launch vehicle vented bays in the cases when it is impossible to categorically ensure satisfaction of all limitations. By the example of Zenit LV it is shown that when using the statistic assessment, it is possible to considerably expand the launch vehicles application field from the viewpoint of ensuring required conditions in the spacecraft area.