scholarly journals DESEMPENHO OPERACIONAL E DISTRIBUIÇÃO LONGITUDINAL DE SEMENTES POR SEMEADORA DE PRECISÃO SUBMETIDA À DIFERENTES CALIBRAGENS DO RODADO

Nativa ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 679-686
Author(s):  
Tiago Pereira da Silva Correia ◽  
Arthur Gabriel Caldas Lopes ◽  
Leandro Augusto Felix Tavares ◽  
Wesley Matheus Cordeiro Fulgêncio Taveira ◽  
Paulo Roberto Arbex Silva
Keyword(s):  
Experimental Design ◽  
Fuel Consumption ◽  
Surface Condition ◽  
Soil Surface ◽  
Field Capacity ◽  
Operational Performance ◽  
Longitudinal Distribution ◽  
Tire Pressure ◽  
Accuracy Index ◽  
Tukey Test

As regulagens da semeadora-adubadora são cruciais para a correta distribuição dos insumos, melhorando assim o desempenho operacional. O objetivo do trabalho foi avaliar a distribuição longitudinal de sementes e o desempenho operacional de uma semeadora-adubadora de precisão em função de diferentes pressões de insuflagem dos pneumáticos. O delineamento experimental utilizado foi de blocos casualizados, sendo os tratamentos três pressões de insuflagem dos pneus (138, 241 e 345 kPa), repetidos em seis blocos, totalizando 18 parcelas de 60 m de comprimento e 4,5 m de largura cada. Realizou-se avaliações de consumo de combustível horário (Chc), velocidade operacional (V), deslizamento dos pneus (DP), capacidade de campo operacional (Cco), distância entre sementes (DES), coeficiente de variação do espaçamento entre sementes (CVes) e índice de precisão da distribuição (IP). Os dados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey (P ≤ 0,05). Os resultados indicaram maior Chc e DP pela pressão 345 kPa. Menor falha, dupla, CVes, e maior IP, foram obtidos pela pressão 241 kPa. Cco não diferiu. Salienta-se que para cada tipo de máquina e condição de superfície do solo, seja necessário o refinamento da pressão dos pneus e regulagens da máquina. Palavras-chave: pressão; insuflagem; consumo de combustível; patinagem; plantabilidade.   Operational performance and longitudinal distribution of seeds by precision seeder submitted to different calibrations of the wheel   ABSTRACT: The settings of the seeder-fertilizer are crucial for the correct distribution of inputs, thus improving operational performance. The objective of the work was to evaluate the longitudinal distribution of seeds and the operational performance of a precision seed drill-fertilizer in function of different tire insufflation pressures. The experimental design used was randomized blocks, with three tire insufflation pressures from the seeder-fertilizer (138, 241 and 345 kPa), repeated in six blocks, totaling 18 plots of 60 m long and 4.5 m wide each. Hourly fuel consumption (Chc), operational speed (V), tire slip (DP), operational field capacity (Cco), distance between seeds (DES), variation coefficient of spacing between seeds were performed (CVes) and distribution accuracy index (IP). The data were subjected to analysis of variance and the means compared by the Tukey test (P ≤ 0.05). The results indicated higher Chc and DP by the 345 kPa pressure. Minor failure, double, CVes, and higher IP, were obtained by pressure 241 kPa. Cco did not differ. It should be noted that for each type of machine and soil surface condition, refinement of tire pressure and machine adjustments is necessary. Keywords: pressure; insufflation; fuel consumption; skating; plantability.

scholarly journals OPERATIONAL PERFORMANCE OF AN AGRICULTURAL TRACTOR UNDER DIFFERENT TIRE INFLATION PRESSURES IN THE SUBSOILING OPERATION

2020 ◽  
Vol 7 (4) ◽  
pp. 59-64
Author(s):  
Arthur Gabriel Caldas Lopes ◽  
Tiago Pereira da Silva Correia ◽  
Gabriel Pastor de Barros Lima ◽  
Isabela Dias de Souza ◽  
Wesley Matheus Cordeiro Fulgêncio Taveira ◽  
...  
Keyword(s):  
Experimental Design ◽  
Fuel Consumption ◽  
Field Capacity ◽  
Operational Performance ◽  
Agricultural Machinery ◽  
Inflation Pressure ◽  
Mechanization Laboratory ◽  
The University ◽  
Efficiency And Productivity ◽  
Agricultural Tractor

For the agricultural tractor's best performance, it must be correctly adapted to the job. Among other factors, the adequacy of tire inflation pressure is one of the most important and may influence the operation's efficiency and productivity. This study aimed to evaluate an agricultural tractor's operational performance with different tire inflation pressures in the subsoiling operation. The study was carried out in an experimental area of the Agricultural Machinery and Mechanization Laboratory of the experimental farm “Água Limpa,” belonging to the University of Brasília. The experimental design used was in randomized blocks with the following values, 206.8 kPa (30 psi), 137.9 kPa (20 psi), and 68.9 kPa (10 psi), of inflation pressure for agricultural tractor tires. The mechanized set used was a tractor model TM7020 2WD MFWD pulling a subsoiler with five shanks, SPCR model, in a Latossolo Vermelho-Amarelo. The higher inflation pressure resulted in greater slippage, advance, hourly fuel consumption, and lower speed and operational field capacity.

scholarly journals PERFORMANCE OPERATIONAL AND COSTS OF MECHANIZED STUMP EXTRACTION SETS

2020 ◽  
Vol 28 ◽  
pp. 326-335
Author(s):  
Tiago Pereira da Silva Correia ◽  
Arthur Gabriel Caldas Lopes ◽  
Francisco Faggion ◽  
Guilherme Rodrigues de Brito ◽  
Saulo Fernando Gomes de Sousa
Keyword(s):  
Experimental Design ◽  
Fuel Consumption ◽  
Field Capacity ◽  
Operational Performance ◽  
Economic Optimization ◽  
Forestry Sector ◽  
Mechanized Removal ◽  
The One ◽  
Agricultural Tractor ◽  
Eucalyptus Urograndis

Stump extraction can be carried out in different ways, among which the mechanized removal is the most usual in the forestry sector. Information regarding the operation with cutting implements is important in the context of decision taking, operational and economic optimization of the activity. The objective of this work was to evaluate the operational performance and mechanized costs of different stump extractors implements in an eucalyptus harvested area. The work was carried out in an Eucalyptus urograndis clones harvested area where the treatments adopted for removal were the following: agricultural tractor + shredder head (T1), excavator + shovel bucket (T2); excavator + shredder head (T3), excavator + stump shear (T4) and bulldozer mat + stump pullers (5). The experimental design was the completely randomized, with four replications per treatment, where it was evaluated the operational efficiency (Ef), operational field capacity (Ofc), extraction productivity (Ps), hourly fuel consumption (Fch), hourly cost (HC), operational (OC) and by extracted stump (SC). For the conditions of the work, the T5 was the one with the highest Ef, Ofc, and Ps, lowest OC and SC.

scholarly journals Seeder-fertilizer performance with two furrowing mechanisms and sowing speed

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Antonio Luiz Viegas Neto ◽  
Cristiano Márcio Alves de Souza ◽  
Sálvio Napoleão Soares Arcoverde ◽  
Izidro dos Santos de Lima Junior ◽  
Lígia Maria Maraschi da Silva Piletti
Keyword(s):  
Experimental Design ◽  
Plant Height ◽  
Average Distance ◽  
Plant Population ◽  
Plant Distribution ◽  
Operational Performance ◽  
Longitudinal Distribution ◽  
Sunflower Crop ◽  
Plant Stand ◽  
Field Emergence

The displacement velocity of the tractor-seeder set, associated with the furrowing mechanism, influences the plant distribution and the establishment of a correct plant stand in the field. The objective of this study was to evaluate the operational performance of a seeder-fertilizer in the non-tillage sunflower crop, according to sowing speeds and furrow mechanisms. The experimental design used was the randomized blocks, with treatments arranged in a split-plot scheme, where the plots were the furrowing mechanisms (chisel openers and double disk) and the subplots were the sowing speeds (3.2; 4.6; 6.2 and 7.0km h-1), with three replicates. The following were determined in this study: the emergence speed index, the emergence in the field, the average distance between the plants, plant height, plant population and the longitudinal distribution of plants. Sunflower sowing using a chisel openers provides greater emergence in the field, emergence speed index and, consequently, greater plant population. Sowing speed ranging from 3.2 to 7.0km h-1 do not influence field emergence, emergence speed index, height and population of sunflower plants.

scholarly journals Operational performance of a tractor-seeder according to the velocity and working depth

2016 ◽  
Vol 20 (3) ◽  
pp. 280-285 ◽  
Author(s):  
Deivielison X. S. Macedo ◽  
Francisca E. de A. Nicolau ◽  
Henryque C. F. do Nascimento ◽  
Enio Costa ◽  
Carlos A. Chioderoli ◽  
...  
Keyword(s):  
Experimental Design ◽  
Fuel Consumption ◽  
Agricultural Production ◽  
Operational Performance ◽  
Good Efficiency ◽  
Production Chain ◽  
Agricultural Equipment ◽  
Satisfactory Performance ◽  
Normal Spacing

ABSTRACT The sowing process is one of the most important steps in agricultural production chain, requiring a good efficiency in order to avoid seed and plant population losses. In order to achieve a satisfactory performance of the seeder, the agricultural implement needs to be properly adjusted. Therefore, the present study aimed to verify both the operational performance and sowing quality of the agricultural equipment, depending on different working depths and different operating velocities. The experimental design was a factorial, with two theoretical velocities and three working depths. The velocity of 6.8 km h-1 achieved both a good operating consumption and a low fuel consumption per working area and when associated with working depth of 0.05 m provided better operational performance. However, the operating velocity of 4.8 km h-1 made it possible to increase the number of normal spacing of seeds, an improved quality of sowing and the possibility of greater population.

scholarly journals Fuel consumption of a sugarcane harvester in different operational settings

2016 ◽  
Vol 20 (6) ◽  
pp. 588-592 ◽  
Author(s):  
Carlos R. G. Ramos ◽  
Kléber P. Lanças ◽  
Gabriel A. de Lyra ◽  
Jefferson Sandi
Keyword(s):  
Fuel Consumption ◽  
Electronic Device ◽  
Operational Performance ◽  
Forward Speed ◽  
Flow Meters ◽  
Tukey Test ◽  
Operational Costs ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Sugarcane Harvester

ABSTRACT The interventions performed during the mechanized harvesting are essential to improve the operational performance of sugarcane harvesters and reduce operational costs. The objective of the present study was to evaluate the fuel consumption of a sugarcane harvester in different forward speeds and engine rotations. Harvesting was conducted in a green cane plot, with the variety RB 855156. Flow meters were installed in the harvester's fuel supply system and an electronic device was used for data acquisition. The experiment was carried out in a completely randomized design in a factorial scheme (3 x 2), using three engine rotations and two forward speeds, with six replicates. Harvesting capacity and fuel consumption per hour, per area and per ton of harvested sugarcane were analyzed. The results were subjected to analysis of variance and means were compared by Tukey test. The variations in engine rotation did not affect the performance for harvesting capacity, but influenced fuel consumption. Forward speed influenced both harvesting capacity and fuel consumption.

scholarly journals DESEMPENHO OPERACIONAL DO CONJUNTO TRATOR SEMEADORA ADUBADORA DE FLUXO CONTÍNUO EM FUNÇÃO DA PRESSÃO DE INFLAÇÃO DOS RODADOS E VELOCIDADE DE DESLOCAMENTO

2019 ◽  
Vol 34 (2) ◽  
pp. 152-161 ◽  
Author(s):  
Marcelo Queiroz Amorim ◽  
Francisca Edcarla de Araujo Nicolau ◽  
Clice de Araujo Mendonça ◽  
Paulo Ricardo Alves dos Santos ◽  
Carlos Alessandro Chioderoli
Keyword(s):  
Continuous Flow ◽  
Field Capacity ◽  
Operational Performance ◽  
Inflation Pressure ◽  
Tire Pressure ◽  
Wheel Slip ◽  
Initial Development ◽  
Displacement Speed ◽  
Crop Planting ◽  
E Mail

DESEMPENHO OPERACIONAL DO CONJUNTO TRATOR SEMEADORA ADUBADORA DE FLUXO CONTÍNUO EM FUNÇÃO DA PRESSÃO DE INFLAÇÃO DOS RODADOS E VELOCIDADE DE DESLOCAMENTO   MARCELO QUEIROZ AMORIM1, FRANCISCA EDCARLA DE ARAÚJO NICOLAU2, CLICE DE ARAÚJO MENDONÇA3, PAULO RICARDO ALVES DOS SANTOS4, CARLOS ALESSANDRO CHIODEROLI5   1Doutorando em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC Bloco 804, s/n – Pici, cep:60455-760, Fortaleza - CE, Brasil. E-mail: [email protected] 2Doutoranda em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC Bloco 804, s/n - Pici, cep:60455-760, Fortaleza - CE, Brasil. E-mail: [email protected] 3Mestre em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC Bloco 804, s/n - Pici, cep:60455-760, Fortaleza - CE, Brasil. E-mail: [email protected] 4Doutorando em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC Bloco 804, s/n - Pici, cep:60455-760, Fortaleza - CE, Brasil. E-mail: [email protected] 5Professor Doutor, Universidade Federal do Triângulo Mineiro (UFTM), Departamento de Engenharia Agrícola, Av Rio Paranaíba, n: 1295, Centro, cep: 38280000, Iturama- MG, Brasil, E-mail: [email protected]   RESUMO: O processo de semeadura é uma etapa que merece considerável atenção durante a implantação da cultura. Diversos fatores, como velocidade de deslocamento e pressão de inflação dos rodados da semeadora, podem interferir diretamente no desempenho energético e operacional do conjunto mecanizado, no desenvolvimento inicial e no estabelecimento da cultura no campo. Objetivou-se, com este trabalho, avaliar o desempenho operacional e energético do conjunto trator-semeadora em função da pressão de inflação dos rodados da semeadora e velocidade de deslocamento do trator. O trabalho foi realizado na Universidade Federal do Ceará, Fortaleza (CE), na área do Laboratório de Investigação de Acidentes com Máquinas Agrícolas (LIMA). O experimento foi em blocos casualizados, em esquema fatorial 2 x 3, com quatro repetições, sendo duas pressões dos rodados da semeadora (138 Kpa e 165 kpa) e três velocidades de deslocamento do trator (3,9 km h-1, 4,9 km h-1, 7,0 Km h-1).  A pressão de inflação dos rodados da semeadora de 138 kPa propiciou menor consumo de combustível e menor patinamento da semeadora. A velocidade teórica de 7,0 Km h-1 permitiu maior velocidade de deslocamento e maior capacidade de campo efetiva e operacional.   Palavras-chaves: adequação, eficiência energética, semeadura.   OPERATIONAL PERFORMANCE OF AN ENTIRE TRACTOR-SEEDER CONTINUOUS FLOW G I N FUNCTION OF TIRE PRESSURE OF INFLATION AND DISPLACEMENT       SPEED   ABSTRACT: Sowing process is a considerable steps that need attention during the crop planting.  Factors as tire pressure or sower displacement speed, can directly interfere in energetic and operational performance of the entire tractor-seeder , initial development and crop implementation . The aim o of this study was to evaluate the energetic and operational performance of the entire tractor-seeder in function of tire inflation pressure  and tractor displacement  speed. The study was conducted at Federal University of Ceará in Fortaleza (CE), in the area of the Accident Investigation Laboratory in Agricultural Machinery (LIMA). The experiment was design in randomized block in a factorial 2 x 3, with four replications and two tire inflation pressures of sower wheelsets (138 kPa and 165 kPa) and three tractor displacement  speed (3.9 km h-1, 4, 9 km h-1, 7.0 Km h-1). The inflation pressure of 138 kPa had  lower fuel consumption and reduced wheel slip. The theoretical speed of 7.0 km h-1 allowed greater displacement speed and higher to effective and operational field capacity.   Keywords: adaptation, energy efficiency, sowing.  

scholarly journals DESEMPENHO OPERACIONAL E CUSTO DA SUBSOLAGEM COM E SEM RODADO DUPLO NO TRATOR AGRÍCOLA

2020 ◽  
Vol 35 (3) ◽  
pp. 317-329
Author(s):  
Arthur Gabriel Caldas Lopes ◽  
Tiago Pereira da Silva Correia ◽  
Guilherme Rodrigues De Brito ◽  
Alexandre Pinto Ferreira de Almeida Faria ◽  
Paulo Roberto Arbex Silva
Keyword(s):  
Fuel Consumption ◽  
Agricultural Soils ◽  
Field Capacity ◽  
Effective Field ◽  
Mechanical Resistance ◽  
Tukey Test ◽  
The University ◽  
E Mail ◽  
Agricultural Tractor ◽  
Resistance To Penetration

DESEMPENHO OPERACIONAL E CUSTO DA SUBSOLAGEM COM E SEM RODADO DUPLO NO TRATOR AGRÍCOLA   ARTHUR GABRIEL CALDAS LOPES1, TIAGO PEREIRA DA SILVA CORREIA1, GUILHERME RODRIGUES DE BRITO1, ALEXANDRE PINTO FERREIRA DE ALMEIDA FARIA1, PAULO ROBERTO ARBEX SILVA2    1Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Campus Universitário Darcy Ribeiro ICC – Asa Norte, Cep: 70910-900, Brasília/DF, Brasil. E-mail: [email protected], [email protected], [email protected], [email protected] 2Departamento de Engenharia Rural, Universidade Estadual Paulista, Av. Universitária, nº 3780, Altos do Paraíso, Cep: 18610-034, Botucatu/SP, Brasil. E-mail: [email protected]   RESUMO: A descompactação dos solos agrícolas pode ser realizada com diferentes números de rodados do trator agrícola. O objetivo do trabalho foi avaliar o desempenho operacional e econômico da operação de subsolagem utilizando trator agrícola equipado com e sem rodado duplo traseiro. O experimento foi realizado na Fazenda Experimental Água Limpa, pertencente a Universidade de Brasília. O delineamento experimental utilizado foi o inteiramente casualizado em arranjo fatorial 2 x 3 (Duas configurações de rodado, simples e duplos; e três velocidades operacionais, 3,2; 4,2 e 4,9 km h-1), com quatro repetições. O subsolador utilizado foi o modelo SPCR com cinco hastes e ponteiras sem asa, tracionado por um trator modelo TM7020 (4 x 2 TDA) com 109,58 kW de potência. Foram avaliadas a resistência mecânica do solo a penetração (RMP), consumo horário de combustível (Chc) e patinagem dos rodados, capacidade de campo efetiva (Cce) e custo horário (CH). Os dados foram submetidos a análise de variância e as médias comparadas pelo teste de Tukey (P ≥ 0,05). Concluiu-se que a subsolagem com rodado duplo e menor velocidade possibilita menor patinagem, Chc e CH. A Cce foi maior com rodado duplo e maior velocidade.   Palavras-chaves: consumo de combustível, patinagem, subsolador.   PERFORMANCE OPERATIONAL AND SUBSOILING COST WITH AND WITHOUT DOUBLE WHEELS IN THE AGRICULTURAL TRACTOR   ABSTRACT: Agricultural soils decompaction can be carried out with different numbers of wheels on the agricultural tractor. The aim of the work was to evaluate the operational and economic performance of subsoiling operation using an agricultural tractor equipped with and without rear double wheels. The experiment was carried out at Fazenda Experimental Água Limpa, belonging to the University of Brasília. The experimental design used was completely randomized in a 2 x 3 factorial arrangement (two wheel configurations: single and double; and three operational speeds, 3.2; 4.2 and 4.9 km h-1), with four repetitions. The subsoiler used was the SPCR model with five rods and tips without wing, pulled by a tractor model TM7020 (4 x 2 TDA) with 109.58 kW of power. Soil mechanical resistance to penetration (RMP), hourly fuel consumption (Chc) and slip, effective field capacity (Cce) and hourly cost (CH) were evaluated. The data were subjected to analysis of variance and the means compared by the Tukey test (P ≥ 0.05). It was concluded that subsoiling with double wheels and lower speed allows less slip, Chc and CH. The Cce was bigger with double wheels and higher speed.   Keywords: fuel consumption, slip, subsoiler.

scholarly journals Operational performance and energy efficiency of axial harvesters with single and double rotor systems in soybean seed harvest

2021 ◽  
Vol 45 ◽  
Author(s):  
Samir Paulo Jasper ◽  
Gabriel Ganancini Zimmermann ◽  
Daniel Savi ◽  
Lauro Strapasson Neto ◽  
Leonardo Leônidas Kmiecik ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Fuel Consumption ◽  
Block Design ◽  
Soybean Seed ◽  
Field Capacity ◽  
Energy Performance ◽  
Operational Performance ◽  
Randomized Block Design ◽  
Seed Harvest ◽  
Operational Energy

ABSTRACT The decision-making capability of the machine to harvest grains must consider a lower fuel consumption with a higher operating velocity allied to a greater performance of the grain cleaning system, along with lower rates of the damage and waste produced. This study aimed at evaluating the operational performance and the energy efficiency of two axial harvesters, having different trail and separation systems in the soybean seed harvest. The experiment was carried out in a completely randomized block design in 500-m bands, consisting of two factors, namely two axial harvesters (single and double rotor) and six target velocities (3, 4, 5, 6, 7, and 8 km h-1). Regarding the operational energy performance, the hourly fuel consumption, operational speed, operational field capacity, fuel consumption per area and mass of the harvested grain, and the handling capacity of the harvest were evaluated. The harvesting performance parameters, such as the percentage losses in the platform and the trail system, broken grains, impurities, and the pods, which did not undergo threshing, were evaluated. The results obtained showed that the single-rotor harvester had a better energy efficiency, while the double-rotor harvester had a better operational performance. The double-rotor harvester was agronomically more efficient.

Performance of two combine harvester header in soybean crops

2020 ◽  
Vol 13 (2) ◽  
pp. 1
Author(s):  
E. M. Samogim ◽  
T. C. Oliveira ◽  
Z. N. Figueiredo ◽  
J. M. B. Vanini
Keyword(s):  
Experimental Design ◽  
Crop Yield ◽  
Field Performance ◽  
Travel Speed ◽  
The Other ◽  
Combine Data ◽  
Mato Grosso ◽  
Tukey Test ◽  
Combine Harvester ◽  
And Performance

The combine harvest for soybean crops market are currently available two types of combine with header or platform, one of conventional with revolving reel with metal or plastic teeth to cause the cut crop to fall into the auger header and the other called "draper" headers that use a fabric or rubber apron instead of a cross auger, there are few test about performance of this combine header for soybean in Mato Grosso State. The aim of this work was to evaluate the soybean harvesting quantitative losses and performance using two types combine header in four travel speed. The experiment was conducted during soybean crops season 2014/15, the farm Tamboril in the municipality of Pontes e Lacerda, State of Mato Grosso. The was used the experimental design of randomized blocks, evaluating four forward harvesting speeds (4 km h-1, 5 km h-1, 6 km h-1 and 7 km h-1), the natural crops losses were analyzed, loss caused by the combine harvester (combine header, internal mechanisms and total losses) and was also estimated the  field performance of each combine. Data were submitted to analysis of variance by F test and compared of the average by Tukey test at 5% probability. The results show the draper header presents a smaller amount of total loss and in most crop yield when compared with the conventional cross auger.

A Multidisciplinary Approach for the Comprehensive Assessment of Integrated Rotorcraft–Powerplant Systems at Mission Level

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Ioannis Goulos ◽  
Fakhre Ali ◽  
Konstantinos Tzanidakis ◽  
Vassilios Pachidis ◽  
Roberto d'Ippolito
Keyword(s):  
Environmental Impact ◽  
Fuel Consumption ◽  
Comprehensive Assessment ◽  
Pollutant Emissions ◽  
Operational Performance ◽  
Civil Aviation ◽  
Accurate Estimation ◽  
Nox Emissions ◽  
Reactor Model ◽  
Stirred Reactor

This paper presents an integrated methodology for the comprehensive assessment of combined rotorcraft–powerplant systems at mission level. Analytical evaluation of existing and conceptual designs is carried out in terms of operational performance and environmental impact. The proposed approach comprises a wide-range of individual modeling theories applicable to rotorcraft flight dynamics and gas turbine engine performance. A novel, physics-based, stirred reactor model is employed for the rapid estimation of nitrogen oxides (NOx) emissions. The individual mathematical models are implemented within an elaborate numerical procedure, solving for total mission fuel consumption and associated pollutant emissions. The combined approach is applied to the comprehensive analysis of a reference twin-engine light (TEL) aircraft modeled after the Eurocopter Bo 105 helicopter, operating on representative mission scenarios. Extensive comparisons with flight test data are carried out and presented in terms of main rotor trim control angles and power requirements, along with general flight performance charts including payload-range diagrams. Predictions of total mission fuel consumption and NOx emissions are compared with estimated values provided by the Swiss Federal Office of Civil Aviation (FOCA). Good agreement is exhibited between predictions made with the physics-based stirred reactor model and experimentally measured values of NOx emission indices. The obtained results suggest that the production rates of NOx pollutant emissions are predominantly influenced by the behavior of total air inlet pressure upstream of the combustion chamber, which is affected by the employed operational procedures and the time-dependent all-up mass (AUM) of the aircraft. It is demonstrated that accurate estimation of on-board fuel supplies ahead of flight is key to improving fuel economy as well as reducing environmental impact. The proposed methodology essentially constitutes an enabling technology for the comprehensive assessment of existing and conceptual rotorcraft–powerplant systems, in terms of operational performance and environmental impact.

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