Analiza opłacalności stosowania silników tłokowych lub turbinowych do napędu śmigłowców lekkich

Analysis of the operating load of foil-air bearings in the gas generator of the turbine engine during the acceleration and deceleration maneuver

“…This involves a larger unit fuel consumption which is 0.4-0.7 kg/kWh and 0.35 kg/ kWh for the turbine engine and piston engine, respectively. However, the cost-effectiveness of the use of gas turbine engines increases even more due to different fuel prices [3]. In the case of the FSTC-1 turbine engine, designed at the Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems of Lublin University of Technology, it is important to determine the status of the loading of bearings nodes, especially those of gas bearings (transverse and axial) on which the gas generator operates.…”

The Study on Loads on an Aircraft Piston Engine Continental Motors Iof-240-B5b in Training Flights

“…As discussed in works by Hirschman (2009) and Braly (2016), the attempt to achieve highly efficient flight can reduce flight speed by from 5 to 10%. Although a power-to-weight ratio is lower in piston engines than in turbine ones, this difference, according to Dudziak (2013), decreases with increased flight time.…”

“…While the unmanned aircraft, typically used for relatively short missions (often shorter than an hour), could be fitted with turbine engines for economic reasons (Wendeker, Czyż 2016;Dudziak 2013), piston engines remain a basic drive unit for longer missions, especially manned ones. Accordingly, piston engines could be successfully applied even in today's aircraft designs.…”

Analysis of the bearing nodes loads of turbine engine at an unmanned helicopter during a jump up and jump down maneuver

“…By Dudziak [1], mass of the turbine engine assembly, including fuel, is significantly less than the mass of the assembly with a piston engine in the case of one hour flight and the difference of the mass decreases with increasing operation time. This is due to the fact that the turbine engines have a specific fuel consumption of 0.4-0.7 kg/kWh while piston engines has 0.35 kg/kWh.…”