LAUSR

Helexa M., 2014. Monitoring the impact of tyre inflation pressure on tensile properties of forest tractors . Res. Agr. Eng., 60: 127–133. The article discusses monitoring of the impact of tyre inflation pressure on tensile properties of forest tractors. The LKT 81 T forest tractor, manufactured by ZŤS TEES, Martin (Slovak Republic) and widely used in Slovakia, was specifi cally chosen as the mechanised vehicle to be monitored. Tensile properties were examined using standard tensile tests, with a Tatra freight vehicle serving as the load vehicle. Actual measurements were performed on a concrete surface and on soil characterised as gravelly loam whose average moisture was 38%. The statistical methods used to verify the impact of significance from changes in tyre inflation pressure on selected tensile indicators were multi-factor analysis of variance (ANOVA) and Student’s t-test. Even though statistical analysis failed to directly confirm significance in the impact of changes of tyre inflation pressure on selected load indicators for a forest tractor fitted with standard tyres, positive changes can be discerned in measured dependencies. The article concludes with a discussion of the results obtained and their possible application in operational practice.