| Subject | Date Asked |
|
| Air flight sounds | 9/16/2009 |
Q: Does our stealth planes make noises when flying overhead? Thanx, Paul ANSWER: I can't say ...
A: The stealth fighter is not that large.... you didn't say how fast it was going.... could it have ...
|
| Air flight sounds | 9/14/2009 |
Q: Does our stealth planes make noises when flying overhead? Thanx, Paul
A: I can't say definitively, but I'm confident the acoustic signature has been considered in the ...
|
| Physical explanation of enthalpy | 9/3/2009 |
Q: I have checked about a dozen sources and have not grasped the physical interpretation of enthalpy. ...
A: Beyond its mathematical statement, enthalpy gives an alternate view of the energy of a system.. ...
|
| windmills | 8/31/2009 |
Q: I am trying to make a windmill. Please look at my sketch. Can you think of an answer to my two ...
A: This type of windmill is called a Savonius design basically you don't have to let the flow go ...
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| Aircraft Configuration | 8/6/2009 |
Q: What are the advantages of asymmetric Aircraft in terms of forces and moments acting over them?
A: Just off hand I'm not certain on any of advantages or disadvantages of an asymmetric design... it ...
|
| Mach 2 with open cockpit | 7/28/2009 |
Q: Popular Science currently has an article about a SU-27 flying at Mach 2 with an open ...
A: I would say it's hype... while being in the wake of an object provides some "protection", at Mach 2 ...
|
| Gaskets | 7/27/2009 |
Q: I'm not sure how a gasket works. From the pictures on this site, I really don't see how it can ...
A: Consider for example you've developed a pipeline to pump a fluid... the pipeline must be built in ...
|
| hypothetical flight scenario question... | 7/15/2009 |
Q: This is a question my cousin came up with... I am thinking about how to solve it... --- If a jet ...
A: What you've calculated sounds reasonable, except the circumference of the Earth is about 25,000 ...
|
| Aerospace master | 6/18/2009 |
Q: I am looking for ideas regarding my research proposal for the aerospace master, can you help? my ...
A: Why don't you think about the systems that you work(ed) with as an A&P mechanic and then determine ...
|
| Model Rocketry Project | 6/17/2009 |
Q: I am entering my senior year in high school and am working on a scholarship project through a ...
A: I don't think a "wind tunnel" test will work inside a rocket. You could study different conical ...
|
| about CFD | 6/10/2009 |
Q: I am now doing AMAeSI(Associate Member of Aeronautical Society of India).Now i heard that CFD has ...
A: CFD has become quite mainstream with any company engaged in business that involves fluid flow... In ...
|
| Better course: Aerospace or Aeronautics? | 5/30/2009 |
Q: Respected Sir, I have finished my High School (12th grade) in Inida and I would like to know which ...
A: I would say that the future is more promising for aerospace than aeronautics. Aeronautics implies ...
|
| Physics of flight | 5/26/2009 |
Q: In the midst of the great debate on downwind turns the following claim was made: "The inertial ...
A: A helicopter in hover is independent of the wind speed and yes it would be carried with the wind (at ...
|
| Aerospace Terminology | 5/20/2009 |
Q: Janus! Recently I read a paper written in 1935. The author describes a rapid, powerful flow of ...
A: Even though they didn't have jet engines as we know them, they were working on that at the time ...
|
| Wing load | 5/19/2009 |
Q: Mark Is a wing load reduction by 1 lb/sq ft significant to the performance of the aircraft or ...
A: I would say a change in wing loading of 10% is significant (it's the percentage change that would ...
|
| asking yr advice | 5/16/2009 |
Q: is doing a graduate in aeronautics and a postgraduate in aerospace is equivalent to doing an UG an ...
A: I would say they are equivalent for the most part... the "space" part of the name implies there is ...
|
| informatio OF AEROSPACE | 5/12/2009 |
Q: .BASICALLY WHAT ARE THE MAIN DIFFRENCES AMONG AEROSPACE ENGINEERING, AEROSPACE SYSTEM ENGINEERING ...
A: This is somewhat my opinion.... Aerospace Engineering involves all aspects of aeronautical ...
|
| Physics of flight | 5/11/2009 |
Q: In the midst of the great debate on downwind turns the following claim was made: "The inertial ...
A: Sorry for the delay in getting to your question... Kinetic energy is a relative property of a body ...
|
| helicopters | 5/6/2009 |
Q: It has often puzzled me that helicopters can fly forward at high speeds. The main rotor of a ...
A: The main rotor also provides the thrust.... by tilting the plane of rotation slightly forward the ...
|
| Masters or find job after bachelors | 4/3/2009 |
Q: I am Sai. I want to know wether it will be better to try job after my bachelor degree in ...
A: Well, I would say it depends on what options you have.... if you can find a job in today's market ...
|
| high speed stalls | 4/3/2009 |
Q: I know its not impossible for a modern plane to stall as speeds around or in excess of Mach 2, but I ...
A: yes - other than your "no discernable effect" statement you are correct... I would say you would ...
|
| high speed stalls | 4/2/2009 |
Q: I know its not impossible for a modern plane to stall as speeds around or in excess of Mach 2, but I ...
A: Yes.... I'd say bending or snapping your wings off would be catastrophic.... but what follows that ...
|
| high speed stalls | 4/2/2009 |
Q: I know its not impossible for a modern plane to stall as speeds around or in excess of Mach 2, but I ...
A: Actually I'm wondering what your definition of a "stall" is ... If you are considering stall to be ...
|
| ducted propulsion | 3/23/2009 |
Q: I would like to know if a ducted squirrel cage fan could make suitable propulsion for an ...
A: Sorry for the delay in getting back on this question... I've never seen that done for a ducted ...
|
| Paper Airplane Science Project | 2/22/2009 |
Q: Mark, my nine year old son is doing a science fair project on paper airplanes. He is using different ...
A: Well, that's an interesting project to work on with your son... actually there are two issues ...
|
| Aerospace Postgrad | 1/17/2009 |
Q: May I wish you the best for the New year. Impressive profile you have. Permit me to approach you on ...
A: The multidisciplinary degree basically requires the student to take courses in eg. mathematics, ...
|
| scholarships | 12/11/2008 |
Q: hey mark i need some money bad for college, i am a high school senior and i, nor my family as far as ...
A: All I can suggest is to check out Miss State and contact the financial aid office.... You don't ...
|
| computer | 11/27/2008 |
Q: am a freshman who is doing computer science and i would like to know how i can use the course to ...
A: Computer science and aerospace are very different and hence do not share a lot of courses (at an ...
|
| types of careers that can be taken up after aeronautical engineering | 11/23/2008 |
Q: respected sir, i am very much interested in taking up the aeronautical engineering but i need a ...
A: Aeronautical engineers work for companies such as Boeing, Airbus, Lockheed-Martin, Grumman, and many ...
|
| Aeronautics and Math | 11/19/2008 |
Q: How is algebra, trig, calc, matrix algebra ect specifically apply to aeronautical engineering?
A: The mathematical equations that describe the aerodynamics, flight characteristics, performance, etc. ...
|
| Personal Aerospace Projects | 9/20/2008 |
Q: Greetings Mark, I was wondering if you had any suggestions of personal aerospace projects or ...
A: So sorry for the delay in getting back.... yours is a tough question to answer but about the best I ...
|
| Aerospace Eng. UK or US | 9/14/2008 |
Q: I wanted to know if is there any difference between the Aerospace engineering course in the UK and ...
A: I'm really not qualified to answer this question (yet may be able to discover more by discussing ...
|
| what master degree in aviation can a computer engineer have? | 9/11/2008 |
Q: i am computer engineer i would like to have master degree in aviation field "i love aviation it is ...
A: You could look into computational engineering (or computational science and engineering) as a ...
|
| Soundwaves following passenger jet craft | 9/7/2008 |
Q: I was on an evening walk tonight near the local airport, with a steady stream of mid-sized 2-engine ...
A: Nathan, I'm not sure by your description, but you may have heard the jet reversing (after landing). ...
|
| voith schneider propeller | 9/6/2008 |
Q: I don't know if this question is in your specialty. Anyway, could you tell me about voith schneider ...
A: You got me on this one... had never heard of them... so I googled it and apparently they're using ...
|
| Mmo and Mdf | 8/30/2008 |
Q: Vmo is defined as the max indicated airspeed /mach no which can be intentionally flown and at which ...
A: Mcrit is the speed when sonic flow first appears shock waves (of significance) only form after ...
|
| Mmo and Mdf | 8/30/2008 |
Q: Vmo is defined as the max indicated airspeed /mach no which can be intentionally flown and at which ...
A: Mcrit is the Mach number at which supersonic flow first appears on a body.... Mcrit occurs before ...
|
| aero space jobs | 8/19/2008 |
Q: sir, i am doing MS in aero space engineering.what are the job opportunities in this field? ANSWER: ...
A: There are several companies that you have potential to work for... The big ones that come to mind ...
|
| aero space jobs | 8/17/2008 |
Q: sir, i am doing MS in aero space engineering.what are the job opportunities in this field?
A: Without knowing what your specific focus is (eg aerodynamics, structures, flight mechanics, etc.) ...
|
| Air_flow | 8/7/2008 |
Q: Every time I watch some program about aerodynamics, when it comes to the question of how the ...
A: Yes there are equations that tell us the relation between pressure and velocity... the equation is ...
|
| Spool and card demonstration | 7/11/2008 |
Q: and thanks for any help you can offer. I'm taking a fluid mechanics class, where the book mentions ...
A: Yes, I see this is quite different than what I was envisioning... In this case, the air (pressure) ...
|
| Spool and card demonstration | 7/11/2008 |
Q: and thanks for any help you can offer. I'm taking a fluid mechanics class, where the book mentions ...
A: If I understand the demonstration project, the spool is held with its axis (hole) vertical and the ...
|
| Space Shuttle | 6/24/2008 |
Q: On main engine ignition, I have noticed three covered holes near the main engines. There are more ...
A: I'm sorry for the delay, but I'm not sure of to purpose for the cover panels.... I believe they are ...
|
| Human powered flight | 5/10/2008 |
Q: If you had a scaled down pair of helicopter blades (made out of something light, such as plastic), ...
A: Just roughing out some numbers... a 10 ft blade with 1/2 chord would need to rotate at least ...
|
| aircraft performance | 3/23/2008 |
Q: i am training on cessna aircraft. I don't understand when someone says the aircraft is old or the ...
A: Sorry for the delay.... I had some trouble getting on to the AllExperts site.... I don't consider ...
|
| Centerline thrust concept | 3/13/2008 |
Q: I'm aeronautical engineering student. I have some doubts about the common engine configuration for ...
A: All engines are usually offset slightly to accommodate for engine torque effects... I'm not 100% ...
|
| Delima | 3/6/2008 |
Q: I have a B.E. in Electronics and Communication. I want to do masters in Avionics/aerospace ...
A: I don't think you need a degree in aerospace to work in the area of avionics.... my opinion... get ...
|
| Eco air travel | 2/27/2008 |
Q: I am a trend analyst in London and i am researching into how the future of gadgets and technology ...
A: Due to their very nature, aircraft have been on a steady course of increased efficiency (longer ...
|
| Confusion | 2/18/2008 |
Q: Hello I have completed my BE in Mechanical and want to pursue my MS in aerospace but unable to ...
A: Abhishek, With a BE in mech you should have relatively easy adjustment into an aerospace program. ...
|
| Coanda effect and curves | 2/14/2008 |
Q: Dr. Janus. I'm a aeronautical engineering student. I'm fascinated with the Coanda effect. I have ...
A: Well the "equations" would be the Equations of Fluid Motion (EFM) but I don't know of any particular ...
|
| Drag (or shape) factor | 1/29/2008 |
Q: I must repeat my question from jan 22-nd more precisely. I find the drag factor of body created by ...
A: Please e-mail me a drawing, because at this point I'm not sure of what shape you are asking ...
|
| Shape factor of half-cylinder | 1/22/2008 |
Q: I am interested in Savonius rotor, which uses the different aerodynamical shape factor for concave ...
A: I'm assuming you mean the drag coefficients for an open cup facing the flow as compared to that ...
|
| computational fluid dynamics | 12/28/2007 |
Q: sir can u just give a brief introduction about research tool
A: Computational Fluid Dynamics (CFD) is the name given to methods or techniques used to simulate fluid ...
|
| bird flight | 12/25/2007 |
Q: How to computer simulate flight control of birds or insects ? What are the essential parameters ...
A: Biological flight is quite a complicated combination of feedback and control. We can simulate the ...
|
| About Aeronautical studies | 12/18/2007 |
Q: Respected sir, I am S.Yogeshraj.I am doing my B.tech Final year in Information ...
A: Sorry for the delay.... holiday season and I'm not checking my e-mail regularly.... I wouldn't ...
|
| Coanda Aircraft | 12/17/2007 |
Q: I have been researching and building my own Coanda aircraft ...
A: Sorry for the delay in getting back.... haven't been monitoring my e-mail adequately over the ...
|
| Aeronautical Engineering Science Fair Project | 11/27/2007 |
Q: My name is Calum, I am in 8th grade middle school and interested in a career in Aviation (As a pilot ...
A: This is a little outside of my area, but you can measure the barometric pressure, and the ...
|
| career planning | 11/14/2007 |
Q: iam doing my bachlor's first year in aerospace engineering in malaysia american degree programme. so ...
A: Getting a BS in Aerospace (AsE) is a good idea if you are passionate about AsE, as you will cover ...
|
| aerospace | 11/13/2007 |
Q: I have to do an experiment on aerospace or aerodynamics??any ideas im in 10th grade and could really ...
A: You can study the relationship between the length and width of a flat plate (a card) to the rate at ...
|
| rocket science | 11/11/2007 |
Q: would the rocket action still occur if there were no surrounding air??
A: Maria, A rocket operates off of the principle of action and reaction... a rocket "ejects" exhaust ...
|
| Rocket fuel | 11/1/2007 |
Q: What rocket uses the most fuel? Can you tell me where to find information on rockets and how much ...
A: I've only worked with a few rocket simulations (the specs of which I was given by the ...
|
| reg compressible fluids | 10/23/2007 |
Q: i'd like to know that is water a compressible fluid? if not then how the water jet machining is done ...
A: Yes for all practical purposes, water is incompressible... Fluid compressibility has to do with ...
|
| Rocket Engines | 10/11/2007 |
Q: I was once told that a rocket engine is actually an inertial propulsion device (totally unlike a jet ...
A: No it is not true that you must have something (surrounding you) to "push" on for propulsion... A ...
|
| Rocket Engines | 10/10/2007 |
Q: I was once told that a rocket engine is actually an inertial propulsion device (totally unlike a jet ...
A: I would have to say that the "speed limit" you refer to for air, land and sea vehicles is imposed by ...
|
| Rocket Engines | 10/10/2007 |
Q: I was once told that a rocket engine is actually an inertial propulsion device (totally unlike a jet ...
A: A rocket engine and a jet engine operate on the same basic principle yet the jet must capture its ...
|
| Thrust from inlet + diffuser | 10/2/2007 |
Q: I've read that only 8% of the thrust for a supersonic aircraft is generated by the engine, but the ...
A: Rajesh, I'm not sure of where you read that, but... For an aircraft that goes supersonic (like ...
|
| space ships | 8/18/2007 |
Q: I know this is'nt exactly your area, but if you were in space on a space ship and you lit up a ...
A: First of all, you would NEVER do this, but in theory the flame would extinguish itself because there ...
|
| why use bank instead of just yaw | 8/18/2007 |
Q: To my understanding, yaw will cause a change in heading. So why do we bank to turn, i.e. change ...
A: The question is a bit out of my area (i.e. stability and control), but yes a turn from yaw alone is ...
|
| project help | 7/30/2007 |
Q: i wanted your help in selecting a project. i just passed my sixth semester. I am doing aerospace ...
A: For example, you could study the effects of varying the location of the discontinuity in the ...
|
| aerodynamics | 7/29/2007 |
Q: what is aerodynamics?and what basic things should an aeronautical engineer should know about ...
A: Aerodynamics is the study of the flow of gases (like air). Fluid dynamics is the study of all ...
|
| project help | 7/28/2007 |
Q: i wanted your help in selecting a project. i just passed my sixth semester. I am doing aerospace ...
A: You could study an autorotating flat plate. (easy to make... a little more costly to analyze.... ...
|
| Information about CFD | 7/26/2007 |
Q: I'm sai doing aerospace engineering in a reputed institute in moscow..i would like to clarify my ...
A: Computational Fluid Dynamics is the study of fluid flow in and around objects. The mathematical ...
|
| guided missile | 7/11/2007 |
Q: Does the guided missiles really exist and are used for real missions? Can they really follow a ...
A: Sure guided missiles exist (as a matter of fact most all missiles are guided nowadays)..... They ...
|
| turbofan thrust | 6/11/2007 |
Q: do you know what percentage of the forward thrust of a modern commercial jet's turbofan engine comes ...
A: Had to look this up..... (see Mattingly - Elements of Gas Turbine Propulsion)... The formula for ...
|
| Qualities of a Flying Machine | 6/5/2007 |
Q: Mark. I work for a children's museum. I am developing an exhibit on flying machines (both aircraft ...
A: 1. true 2. it has a shape that deflects air downward to create enough lift to overcome the forces of ...
|
| Engine Shutdown during flying | 6/4/2007 |
Q: How long can a jet engine like Boeing 747 for example can glide when it has four engine failures??
A: This is not really in my area of expertise.... try someone who deals with overall aircraft ...
|
| aeronautics to space | 5/30/2007 |
Q: I am taking an admission in aeronautical engineering college and want to know whether I can pursue ...
A: Vivekanand, Don't worry about being an aeronautical engineer instead of an aerospace engineer. ...
|
| movement of a/c | 5/14/2007 |
Q: does the a/c engine sucks the air ahead of it and create low pressure ahead of it and therefore able ...
A: By a/c I'm guessing you mean propeller aircraft.... actually whether a propeller or a jet is used, ...
|
| motor vehicle aerdynamics | 5/1/2007 |
Q: which is more aerodynamically efficient, car driving close to a wall or in the open? and would ...
A: The aerodynamics of the situation is a bit complicated, but I have read that the car will experience ...
|
| wind forces with speed | 4/26/2007 |
Q: im writing a technical report on the design of some wind sails which I hope will catch the wind only ...
A: It's difficult to visualize the orientation of your design, but wind air dynamic pressure is equal ...
|
| Coaxial contra rotating propellers | 3/25/2007 |
Q: Hallo! Could you please explain to me the aerodynamic advantages of coaxial contra rotating ...
A: I'm so sorry this question got by me....my e-mail notice must have gotten lost with other messages ...
|
| hydraulic pressure and hydraulic lock | 1/26/2007 |
Q: In the chinook helicopter, there is power transfer unit that supplies hydraulic pressure of 3000psi ...
A: I'm not really qualified to answer your question (about the specifics of the Chinook helicopter) but ...
|
| candle parachute | 1/23/2007 |
Q: I saw this short celebration on TV once whereas the people where releasing candles (in memory of??) ...
A: I believe I've seen these also. Basically (I believe) they are somewhat like a hot air balloon/drag ...
|
| Pulsejet | 9/3/2006 |
Q: I want the methodology design of thermodynamics and Aerospace for Pulsejet Engines.
A: Interesting how blunt you are with your question! The answer is too detailed to cover here. Just ...
|
| Fluid Mechanics | 7/24/2006 |
Q: I am a student of Aeronautical Engg. I study in 2nd year in the 3rd semester. I wanted to know what ...
A: Sorry for the delay... Fluid mechanics is the study of how a fluid (a substance that can't support ...
|
| gyrocopters | 7/9/2006 |
Q: I am confused by the explanation of the term flapping, as regards the stabilising effect this has on ...
A: I was tempted to respond that this is outside my expertise...but I'd like to give some response... ...
|
| PROJECT | 5/26/2006 |
Q: I need to submit an investigatory project on any topic related to physics in school. I am in grad e ...
A: Why don't you study the flow physics of an autorotating flat plate? Simple to construct (just a ...
|
| component nomenclature | 3/17/2006 |
Q: What's the difference between a PIPE, a TUBE and a DUCT. I already have a leaning, but would like ...
A: Fundamentally there is no difference (in my opinion)... but generally as I use them, a pipe is a ...
|
| multiple airfoil aerodynamics | 3/1/2006 |
Q: what is a tradeoff in replacing a single airfoil with multitude of airfoils of the same performance ...
A: Basically the answer to your question is... possibly.... hows that for a straddle-the-fence answer ...
|
| multiple airfoil aerodynamics | 1/25/2006 |
Q: what is a tradeoff in replacing a single airfoil with multitude of airfoils of the same performance ...
A: Sorry for the major delay in getting back to you.... when I first tried to reply the AllExperts ...
|
| shock waves | 4/17/2005 |
Q: I became interested in shock waves after seeing a picture of an F-14 creating some kind of cloudform ...
A: I'm not exactly sure of what you are trying to accomplish here.... propellers on aircraft ...
|
| arrow penetration into a target | 1/22/2005 |
Q: I will be doing a science fair project on how the mass of an arrow affects its penetrating distance ...
A: I don't know of anything specific..... you may look at some archery magazines (where often times ...
|
| aero | 12/6/2004 |
Q: i would like to seek some information from u if u could help me . i wish to know that im having very ...
A: Sure there is a great deal of work to be done in the computational side of aerospace and rocketry. ...
|
| Air Flow around objects | 11/9/2004 |
Q: How does different shapes effect the flow of air around objects and why is this important in your ...
A: As the air goes over (or around) and object, it changes speed and the air pressure changes (if the ...
|
| Airfoil analysis | 10/5/2004 |
Q: I own a BD-5J Microjet that was built in Australia. The aircraft does not have the original BD-5 ...
A: You could measure from the ground up to the lower surface of the wing at some station out the wing ...
|
| compressible flow and viscous heating | 8/24/2004 |
Q: I have been modeling various geometries that will be exposed to speeds of 550 knots, at 49°C ambient ...
A: The fluid viscosity does play a part (in the recovery factor).... The Prandtl number is the ratio ...
|
| compressible flow and viscous heating | 8/20/2004 |
Q: I have been modeling various geometries that will be exposed to speeds of 550 knots, at 49°C ambient ...
A: The adiabatic wall temperature for such a case is approximately (this would be true for a Prandtl ...
|
| Thom rotors | 6/16/2004 |
Q: Thom rotors seem to be like Flettner rotors with extra discs along the cylinder. How do their lift ...
A: Sorry I've been out for a bit.... I'm not well versed in the Thom vs Flettner rotor topic, but I ...
|
| aeronautical engineering? | 6/10/2004 |
Q: >>>respected sir, i've just passed my 12th board with 64% . sir i am very intrested in doing ...
A: If you are looking for high salaries and promotion I would advise you to get the MBA.... MTech ...
|
| Contra Rotating Propeller | 5/23/2004 |
Q: Respected Sir, What are the advantages of Contra Rotating Propellers?
A: Are you a student in aerospace engineering? Many of your questions seem to be largely of a ...
|
| Wing Physics | 3/26/2004 |
Q: Is it possible to design a wing, so at a given time, it is traveling upwards at the same velocity as ...
A: Sure that is possible, it's all based on the amount of lift produced and the weight of the wing ...
|
| Aerodynamics in a wind tunnel | 2/19/2004 |
Q: My son is doing a science fair project with the question of: Does the shape of a wing on an airplane ...
A: Stephanie, I hope you understand but I really will have a hard time answering your question without ...
|
| Paper Airplane science fair project | 2/10/2004 |
Q: I realize this isn't an extremely technical question, but I need some assistance helping my 6 year ...
A: I would suggest using some form of flat surface (like a piece of cardboard) as a launching deck and ...
|
| aerodynamics | 11/16/2003 |
Q: I am building a Long E-Z kit plane and I am interested in researching the improvement of laminar ...
A: Howard, Here are a few references I dug up.... Douglas Aircraft Staff,"LFC Leading Edge Glove ...
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