Model of injection system for SI radial aircraft engine

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The article presents the results of analysis of operational parameters of piston engine CA 912 ULT which is a propulsion system of ultralight gyroplane Tercel produced by Aviation Artur Trendak. Research was conducted under normal operating conditions of the autogyro and data was collected from 15 independent tests including a total of 14 flight hours conducted during training flights. Engine and flight parameters were recorded at 9 Hz during each flight using on-board Fligh Data Recorded system. Collective results were presented to show the statistical analyses of the individual parameters by determining the mean values, standard deviations and histograms of the distribution of these parameters. The analyses included engine speed, charge pressure, air temperature, oil temperature and exhaust temperature. Histograms of operating points defined by both engine speed and manifold air pressure were also determined. Analyses were carried out to determine the contribution of steady-state and transient engine operation. It was also shown that the dynamics of engine work in real operating conditions is small. Detailed analyses were conducted for steady-state conditions. The value of the engine load index was determined and its statistical analyses were carried out. It was shown that the engine operating points are concentrated mainly in the range of idle and power above 50% of nominal power. The most frequent range is 50% to 80% of nominal power.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aircraft piston engine load distribution in steady state operating conditions

Czarnigowski¹,

Trendak²

2023

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“…Since their first use, aircraft engines have been continuously developed and modified. [3]. In addition, some manufacturers are attempting to use compression ignition engines or engines with reciprocating pistons to power aircraft [7,8,15].…”

Section: Introductionmentioning

confidence: 99%

“…[9,15]. Engines of this type made a comeback after Achates Powers presented a three-cylinder engine with a capacity of 2.7 dm 3 . Originally, the power unit was dedicated to drive vans.…”

Section: Introductionmentioning

confidence: 99%

Analyzing mechanical vibrations of an aircraft opposed piston engine

Biały¹,

Grabowski²,

Skórzyński³

et al. 2021

The paper presents the results of the bench tests to measure mechanical vibrations of a new aircraft opposed piston engine with reciprocating pistons. The PLZ-100 engine is a three-cylinder, six-piston, two-shaft drive unit with a two-stroke diesel cycle. This type of engine is dedicated for powering light aircraft, e.g. autogyros. The tests were carried out on a test bench at the Lublin University of Technology. The engine was loaded with constant torque, for several fixed values of rotational speed of a crankshaft. The angle of the start of diesel injection was changed for each of the rotational speeds. The mechanical vibrations that accompanied the operation of this drive unit were recorded with three measurement transducers and a National Instruments conditioning system. Each of the transducers was mounted on a different axis of the engine. The signals were analyzed from their courses with the DIAdem software. The results were the courses of effective speed and vibration acceleration to conduct a vibration-acoustic evaluation of the PLZ-100, detect and prevent various types of defects or failures.

“…One of the fastest growing branches of aviation is ultralight aviation, i.e. small, maximum two-seat aircraft with take-off mass not exceeding 600 kg [8,14]. They are characterized by a short take-off and landing runway, possibility of using grass airfields, simplicity of operation and maintenance as well as simplified procedure for approval for production and use.…”

Section: Introductionmentioning

confidence: 99%

Analysis of operating parameters of the aircraft piston engine in real operating conditions

Czarnigowski¹,

Rękas²,

Ścisłowski³

et al. 2021

Self Cite

The article presents the results of analysis of operational parameters of piston engine CA 912 ULT which is a propulsion system of ultralight gyroplane Tercel produced by Aviation Artur Trendak. Research was conducted under normal operating conditions of the autogyro and data was collected from 20 independent tests including a total of 28 flight hours, divided into training flights and competition flights.Engine speed, manifold air pressure and temperature, fuel pressure, injection time, and head temperature were recorded at 9 Hz during each flight. Collective results were presented to show the statistical analyses of the individual parameters by determining the mean values, standard deviations and histograms of the distribution of these parameters. Histograms of operating points defined by both engine speed and manifold air pressure were also determined. Analyses of the engine dynamics as a distribution of the rate of change of the engine rotational speed were also carried out. It was shown that the engine operating points are concentrated mainly in the range of idle and power above 50% of nominal power. The most frequent range is 70-80% of nominal power. It was also shown that the dynamics of engine work in real operating conditions is small. It was also shown that the way of use significantly influences the distribution of operating points. During training flights, an increase in the number of take-offs and landings causes an increase in the amount of engine work at take-off and nominal power and at idle.