Essays about: "Propeller development"

Showing result 1 - 5 of 16 essays containing the words Propeller development.

1. 1. Development of a Low Noise Drone Propeller Using CFD Simulations

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Axel Schulz; [2023]
   Keywords : Drone Propeller Low Noise Computational Fluid Dynamics CFD; Technology and Engineering;

   Abstract : Noise pollution generated by drones has in recent years become a concern for humans and wildlife and has in some regions resulted in regulatory backlash. This thesis investigates the possibilities of developing a low noise drone propeller using computational fluid dynamics (CFD) simulations. READ MORE

3. 2. Come Fly with Me (Sustainably) : Pathways to Sustainable General Aviation and Private Pilot Training

   University essay from Högskolan i Gävle/Miljövetenskap

   Author : Michael Stiebe; [2022]
   Keywords : General Aviation; Sustainable Aviation; Sustainable Development; Electric Aviation; Noise Pollution; Leaded Fuel; AVGAS 100LL; Tetraethyl Lead Phaseout; Pilot Training; Recreational Aviation; Switzerland;

   Abstract : Whereas commercial aviation is attempting to achieve the reduction of its substantial carbon footprint, general aviation’s (GA) climate change contribution is negligibly small, which is why the sector is facing other sustainability challenges mainly entailing the operation of dated technology and aircraft, increasing regulatory constraints, rising costs, noise emissions, and popular discontent, as well as remaining the last mobility sector in the world to still use leaded fuels. Throughout recent years, there have been remarkable sustainability trends in GA as well as heightened efforts to improve its emissions profile (noise, pollutants, CO2) and environmental reputation, for instance by the increased use of electric aircraft, especially for private pilot training. READ MORE

4. 3. Development and study of noise generation from propellers

   University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Author : Anton Anton Dunström; Fredrik Skjernov; [2022]
   Keywords : Silent propellers; Propeller development; Noise generation; Skew angle; Blade Area Ratio; Openprop; NATO STANAG no. 1136; Swedish defense and Research Agency FOI ; James Fisher Defense.; Tysta propellrar; Propellerutveckling; Ljudskapande; Skevningsvinkel; Bladtäckningsarea; Openprop; NATO STANAG no. 1136; FOI; James Fisher Defense.;

   Abstract : Noise generation from underwater activities propagates into the marine environment.For marine vessels the propulsion system generates the most noise during itsoperations. Naval vessels that want to operate without being detected want to controlthe sound generating properties of the vessel. READ MORE

5. 4. Method development for rheological characterization of microfibrillated cellulose

   University essay from Karlstads universitet

   Author : Elin Wahlkrantz; [2020]
   Keywords : microfibrillated cellulose; MFC; rheology; characterization; dynamic rotational rheometer; complex viscosity; amplitude sweep; dry content; pH; conductivity; measuring geometry; gel; mikrofibrillerad cellulosa; MFC; reologi; karakterisering; dynamisk rotationsreometer; komplex viskositet; amplitudsvep; torrhalt; pH; konduktivitet; mätgeometri; gel;

   Abstract : This thesis contributes to a development of a method for rheological characterization of microfibrillated cellulose. The intended use of the method is to be able to distinguish between different grades of microfibrillated cellulose. READ MORE

6. 5. Robust control system development forVTOL-to-fixed wing flight transition withthe EcoSoar UAV : A masters thesis in Automatic Control

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Robert Hedman; [2020]
   Keywords : drone; UAV; thesis; automatic; control; VTOL;

   Abstract : A non switching, non linear, quaternion based attitude P2 controller, together with a sensitivitynormalizing function for the control surfaces has been simulated and implemented on a flying fixedwing with non vectored engines. In simulations the controller worked well in all flight modes,hovering, transition and flying, and also rejected a simple wind disturbance in all modes. READ MORE