Salvatore F. Papandrea, Stanimir Stoilov, Георги Ангелов, Tanya Panicharova, Piotr S. Mederski, Andrea Rosario Proto,
Cable-based yarding technology has had a long tradition on steep slopes in Europe, and the new implementation of yarding functions in recent decades favored operational efficiency and lower extraction costs. The main goal of this study was to evaluate the performance of the Syncrofalke 3t truck-mounted Processor Tower Yarder (PTY) on steep terrain, in coniferous forests managed with the shelterwood system. In particular, the aim was to determine PTY productivity and costs, with attention to parameters ...
Tópico(s): Forest Insect Ecology and Management
2023 - Multidisciplinary Digital Publishing Institute | Forests
Stanimir Stoilov, Andrea Rosario Proto, Георги Ангелов, Salvatore F. Papandrea, Stelian Alexandru Borz,
Steep terrain harvesting can only be implemented by a limited set of operational alternatives; therefore, it is important to be efficient in such conditions, in order to avoid incurring high costs. Harvesting abiotically-disturbed forests (salvage harvests caused by wet snow), which is becoming common these days, can significantly impact the operational efficiency of extraction operations. This study was implemented in order to evaluate the performance of truck-mounted uphill cable yarding operations ...
Tópico(s): Forest Management and Policy
2021 - Multidisciplinary Digital Publishing Institute | Forests
Stanimir Stoilov, G. Kostadinov,
On four-wheel-drive skidders (FWDS) the front and rear axles are rigidly coupled and the tyres are the same size. This means that angular speeds of the front and rear tyres are the same. Therefore, variations in the rolling radii of the front and rear tyres, due to changes in inflation pressure and tyre deflection, and different sinkage, etc., could cause significant torsional wind-up. A theoretical analysis and experiments showed that the coefficient of weight distribution influenced the efficiency ...
Tópico(s): Agriculture and Farm Safety
2009 - Elsevier BV | Biosystems Engineering
Michal Allman, Martin Jankovský, Zuzana Allmanová, Michal Ferenčík, Valéria Messingerová, Mária Vlčková, Stanimir Stoilov,
Aim of study: This study is focused on detailed analysis of accidents in yarding during the years 2006–2014. There is still not enough information about such accidents in Central Europe in the literature available.Area of study: We collected the data on occupational accidents recorded in timber yarding from the databases of the Slovak state forest enterprise. Material and Methods: The data on occupational accidents were recorded according to actual European Regulation, the form of the record meets ...
Tópico(s): Agriculture and Farm Safety
2017 - National Institute for Agricultural and Food Research and Technology | Forest Systems
Stanimir Stoilov, Salvatore F. Papandrea, Георги Ангелов, Delyan Oslekov, Giuseppe Zimbalatti, Andrea Rosario Proto,
Salvage logging is increasing in Central Europe because of the growth of severe meteorological events, and timber harvesting in these conditions is challenging in terms of both productivity performances and safety of the operations. In recent years, with the increase of natural calamities, several researchers studied machinery productivity performances regarding salvage logging carried out by ground-based systems. In fact, a common post-disturbance management approach is salvage logging which consists ...
Tópico(s): Tree Root and Stability Studies
2023 - PAGEPress (Italy) | Journal of Agricultural Engineering
Salvatore F. Papandrea, Stanimir Stoilov, Maria Francesca Cataldo, Pavel Nichev, Георги Ангелов, Andrea Rosario Proto,
Forwarders often load logs organized in large piles by modified farm tractors, skidders, animals, other forwarders, etc., but currently, there are no studies on how the different concentrations of logs affect forwarder performance in terms of time consumption, productivity, and costs in forwarding operations. A study was conducted in three locations situated in Bulgaria (sites A and B) and in southern Italy (site C): in site A the logs were spread in the stand, in site B they were concentrated in ...
Tópico(s): Soil Mechanics and Vehicle Dynamics
2024 - | Croatian journal of forest engineering
Salvatore F. Papandrea, Stanimir Stoilov, Maria Francesca Cataldo, Krasimir Petkov, Георги Ангелов, Antonio Zumbo, Andrea Rosario Proto,
The efficient planning and control of timber harvesting operations is crucial to growth productivity and reducing costs, and different systems or methods are applied to obtain elevated performance. In particular, cable yarding is a highly appreciated and very efficient wood extraction method in areas that are difficult to access with ground-based extraction machines. Combined logging systems are not diffuse and not often implemented. For this reason, the use and the application of innovative methods ...
Tópico(s): Advanced Manufacturing and Logistics Optimization
2024 - Multidisciplinary Digital Publishing Institute | Forests
Stanimir Stoilov, Pavel Nichev, Георги Ангелов, Marina Chavenetidou, Petros A. Tsioras,
Examination of the technical and economic dimensions of skidding operations is imperative for sustainable forest management, offering invaluable insights crucial for the formulation of sustainable forestry strategies. In many countries, the shift from modified agricultural machinery to purpose-built forest machinery has become apparent in forest operations. However, this transition often accompanies a reduction in logging crew size, raising new questions about productivity, costs, and ergonomics ...
Tópico(s): Forest Management and Policy
2023 - Multidisciplinary Digital Publishing Institute | Sustainability
Stanimir Stoilov, Andrea Rosario Proto, Delyan Oslekov, Георги Ангелов, Salvatore F. Papandrea,
Abstract In the last decade, technological innovation in the forest operations sector has allowed levels of mechanization alternative to agricultural tractors and animal logging. These machines are used to load logs from skid roads and move logs to the next pile, until the load space is fully loaded. Fortunately, in recent years the development of new technological progresses in forestry mechanization created an alternative operation on ground-based system with the use of a combi-forwarder for wood ...
Tópico(s): Forest Management and Policy
2023 - Springer Science+Business Media | Small-scale Forestry