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upwash/downwash, leading/trailing edge, vortex, and wing loading—core vocabulary for predicting forces and stability.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},384467,1792382546,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":79,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":45,"language":135,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":136,"faqs":137,"seo_title":138,"seo_description":61,"update_tm":139,"read_time":140},137455077381,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","DESIGN.BUILD.FLY.(DBF  \nRAPID LOW-COST PROTOTYPING OF EXPERIMENTAL FLYING MODELS  \n*AeronauticsiAerodynamics *.Basic DBF*Hacking*.Mission-specific DBF  \n# INTRODUCTION (CLASS 1)\n\nModelers who became Aerospace giants,amazing model aircraft,basic aerodynamics,aircraftforms/functions,communication of design shapes/features,three-view design sketching,buildingmaterials/methods,building/flying the simple Cadet Glider,exploring infinite design variations andhacking/prototyping.This is a somewhat fast-paced fun class,with take-away flying models.  \n# ADVANCED(CLASS 2-ideally for Class 1 graduates)\n\nTeams will chose a specific mission(fighter,transport,special purpose,etc).Consider missionfactors(use/users,performance,safety,advanced technologies,environment,regulations,etc)Conceptualize the overall design.Build a small index flying card model.The model will include asketch diagram on the top locating major components/systems and specification notes on thebottom.Teams will give a brief presentation of their model and hopefully demonstrate asuccessful flight.This is a hypersonic-paced,challenging,but do-able,learn-a-lot class  \nAERODYNAMICS &AERONAUTICS  \nAVIATION-The art,science and technology of fight within the atmosphere  \nAEROSPACE-The combination of Aeronautics and Astronautics(Space)  \nAERONAUTICS-The science of fight within the atmosphere  \nAERODYNAMICS-The science of the energies and forces of air in motion  \nAERODYNAMICS/AERONAUTICS-TERMS:  \n*FLOW-(Air)-At subsonic,compressible/transonic,supersonic,hypersonic speeds  \n*LAMINAR FLOW-smooth (vs turbulent)  \n*BOUNDARY LAYER-very thin viscous layer of fow friction on a wing  \n*WIND TUNNELFACTORS-Air velocityldensity.pressure distribution,flow visualization,force,movement  \n*AIRFOIL-A wing/wing-like surface specifically designed to produce lit,thrust or directional stability  \n*CAMBER-The curved part of an airfoil-from leading to trailing edges  \n*CHORD-straight line drawn from leading to trailing edge  \n*ASPECT RATIO-Wing span divided by the mean/average chord  \n*DOWNWASH-Downward movement of air behind of a wing in flight  \n*UPWASH-Upward movement of air ahead of awing in flight  \n*LEADING EDGE-The front part of an airfoil or wing  \n*TRAILING EDGE-The rear part of an airfoil or wing  \n*VORTEX-A spinning column of air created by pressure differences behind the wingtip  \n*WING LOADING-Ratio of aircraft weight to wing area  \n*PROPELLER-similar to a wing but its incidence (pitch),chord,blade,and speed varies from hub to tip  \n# NATURAL FORCES:\n\n*GRAVITY-Mutual atraction between the Earth and the aircraft.Diminishes with alitude  \n*DRAG-INDUCED-A result of wing at higher angle to better generate lit at lower speed  \n*DRAG-FORM(PARASITIC)-A result of movement through the air-effect is reduced by streamlining  \n# ARTIFICIAL FORCES:\n\n*THRUST-Push and/or pull via jet/prop(or gravity-especially in gliders)  \n*LIFT-As air flow speed increases pressure decreases creating lift across a wing(Bernouli's Law)  \n*TORQUE-if propeller rotating under power,then plane rotates in opposite direction  \n# CENTERS:\n\nCENTER OF GRAVITY(CG)-Fulcrum point of balance-(teeter-oter)front to back,side to side of aircraft  \nCENTER OF LIFT (CL)-Fulcrum point of balance(suspended from string)front to back,side to side  \nCENTERS ALIGNED-CG and CL should be closely aligned verticaly for proper balance front to back  \nMOMENT ARMS-\"Levers\"extending through and out from the CG/CL fulcrum points  \nRelative length relates to fight sensitivity.Longer tail moment-less sensitive.Shorter is more sensitive  \nANGLES:  \n*DIHEDRAL-The tips pf wing halves or portions angled upward to increase lateral stability /dampen roling  \n*ANHEDRAL-For wings,the haives or tips angle down decreasing stability/enhance rolling-(Harrier jet)  \n*SWEEP-degree of fying surfaces angling forward or rearward  \n*WASHOUTNASHIN-Wing tip rear-twist up(washout-helps resist tip stall)or twist down(washin)  \n*INCIDENCE-angle(+,0,-)of aerodynamic surfaces to f","cbCainhrN37NmMGH","https://ap.wps.com/l/cbCainhrN37NmMGH","pdf",10056741,"English","# INTRODUCTION (CLASS 1)\n## Core build-and-fly takeaways\n# ADVANCED (CLASS 2)\n## Mission selection and design considerations\n# AERODYNAMICS & AERONAUTICS\n## Key terms and definitions\n# NATURAL FORCES\n# ARTIFICIAL FORCES\n# CENTERS AND ANGLES\n# AIRFOILS\n## Flight axes and controls\n# DESIGN: THE SHAPES OF FLIGHT - FORM FOLLOWS FUNCTION","[{\"question\":\"What is the goal of the CLASS 1 introduction in this Design.Build.Fly (DBF) workbook?\",\"answer\":\"CLASS 1 focuses on learning basic aerodynamics and aircraft design concepts while building/flying simple take-away cadet glider-style models through fast-paced, fun prototyping.\"},{\"question\":\"What does the CLASS 2 advanced teams assignment require?\",\"answer\":\"Teams choose a specific mission, consider factors like performance, safety, technologies, environment, and regulations, then conceptualize the overall design and build an index flying card model with diagrams and specification notes for a short presentation and flight.\"},{\"question\":\"Which aerodynamics terms are defined in the workbook and why are they important?\",\"answer\":\"It defines flow regimes, laminar flow, boundary layer, wind tunnel factors, airfoil geometry, camber/chord/aspect ratio, upwash/downwash, leading/trailing edge, vortex, and wing loading—core vocabulary for predicting forces and stability.\"}]","DESIGN.BUILD.FLY. (DBF) - RAPID LOW-COST PROTOTYPING OF EXPERIMENTAL FLYING MODELS - Aeronautics i Aerodynamics Basic DBF Hacking Mission-specific DBF | PDF",1790263484,7]