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PhysicsForums freight elevator efficiency?  
15:37 8-Aug-07   [Replies: 2, Views: 92]    By: Unnamed
Hello all, I have probably a simple question for mechanical engineers. I would like to know the energy efficiency of real world freight elevators, going up with a speed of one meter per second. How a...
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PhysicsForums friction??  
10:04 7-Aug-07   [Replies: 13, Views: 187]    By: Unnamed
dont have much time, ll make it quick does friction depends on area of surface of contact?? i dont think it does...
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PhysicsForums Mercury Sable RC steering help  
23:44 6-Aug-07   [Replies: 2, Views: 101]    By: Unnamed
hey, i need some help with a project i am working on. what i am trying to do is take a full size car and turn it into a RC car. however, inorder to keep the car street legal, i need to keep all t...
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PhysicsForums Idea for a high speed "craft"...would this work?  
11:38 6-Aug-07   [Replies: 22, Views: 313]    By: Unnamed
Note: since I am not a physicist, I can't be certain how foolish I might sound if the following hypothetical device would not be physically possible (or economically useful, for that matter), but I'm ...
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PhysicsForums Worried  
21:05 5-Aug-07   [Replies: 4, Views: 150]    By: Unnamed
HI everybody...am a new guy at this forum....i wanna tell u that am worried about joining the department of aeronautics and aerospace at my faculty...(BTW ..am a student at the faculty of engineering ...
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PhysicsForums Rc Hovercraft Race @ Shaastra 2007,india  
03:11 5-Aug-07   [Replies: 4, Views: 208]    By: Unnamed
Hi friends SHAASTRA 2007 (IIT MADRAS,INDIA) brings you an opportunity to earn a lot of cash and become famous . Participate in FIRE n ICE event where you have to make a small hovercraft and compete...
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PhysicsForums FAA Aerodynamics Video(s)  
22:19 4-Aug-07   [Replies: 3, Views: 138]    By: Unnamed
http://video.google.com/videoplay?do...55611781104323 [http://video.google.com/videoplay?docid=8053355611781104323]>...
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PhysicsForums Looking for the most comprehensive engine fundamental book. Suggestio..  
18:00 4-Aug-07   [Replies: 0, Views: 81]    By: Unnamed
It seems that John Heywoods, Internal Combustion Engine Fundamentals is pretty popular, and I am going to probably purchase that... Is there any other 'rivals' or better ones? I was hoping to lo...
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PhysicsForums Boeing & NASA makes 'quiet' advances  
10:52 4-Aug-07   [Replies: 7, Views: 248]    By: Unnamed
FYI: Boeing makes 'quiet' advances Noise-reduction efforts pay off at remote airfield in Montana By JAMES WALLACE SEATTLE POST-INTELLIGENCER AEROSPACE REPORTER http://seattlepi.nwsource.com/b...
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PhysicsForums how does a plane turn???  
07:30 4-Aug-07   [Replies: 18, Views: 327]    By: Unnamed
damnit i am not able to figure out what does a rudder do in an aircraft. an aircraft banks, lift has a component perpendicular to the fuselage in horizontal plane, it plays for the centrifugal force...
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PhysicsForums How much is left on a roll?  
06:55 4-Aug-07   [Replies: 17, Views: 304]    By: Unnamed
I am not an engineer and my math skills are not great but I have this problem that I would like to know the answer to. We have a blister packaging process that seals labeled tyvek against formed pv...
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PhysicsForums need the website address  
00:01 1-Aug-07   [Replies: 2, Views: 88]    By: Unnamed
I am a student from china, I want to use the funtion of Online Calculator about the Mechanical Engineer. Can someone to tell me the associated web site address.Thank you. My Email Address is shake...
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PhysicsForums Dry lift testing  
00:00 1-Aug-07   [Replies: 3, Views: 103]    By: Unnamed
Can anyone point in the direction of any information on dry lift testing for turboshaft fuel pumps? I need to write a good practices guideline for this and need to find as much info as I can. Thank...
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PhysicsForums platform for page turner  
00:00 1-Aug-07   [Replies: 8, Views: 161]    By: Unnamed
I am designing a book scanner (I will be using a digital camera), and I need some advice for constructing a platform that will properly support large books. Through much research I have determined th...
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PhysicsForums Nautical engineering  
21:58 31-Jul-07   [Replies: 7, Views: 192]    By: Unnamed
I hope this is the right forum for this topic, I thought it would be because boat design would involve engines which are related to mechanical engineering. Anyways, I was wondering if anyone here is ...
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PhysicsForums Tesla Turbine applications  
11:27 29-Jul-07   [Replies: 4, Views: 255]    By: Unnamed
I have read a bit about Tesla turbines and their amazingly high RPM output. I have also read that they don't product much torque, which is possibly why they haven't been used in anything more than de...
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PhysicsForums VASIMR Propulsion  
22:46 28-Jul-07   [Replies: 9, Views: 264]    By: Unnamed
Evo brought this to my attention in another thread. http://www.adastrarocket.com/home.html [http://www.adastrarocket.com/home.html]> Quote:...
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PhysicsForums Automobile energy cost - Dust to Dust report  
16:15 28-Jul-07   [Replies: 15, Views: 641]    By: Unnamed
Some organization called CNW Marketing Research Inc. [http://www.cnwmr.com/]> has published an "analysis" of the total energy consumption of various kinds of cars. It is called Dust to Dust...
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PhysicsForums verticle to rotational torque  
21:15 27-Jul-07   [Replies: 2, Views: 101]    By: Unnamed
QUESTION: Thank you for assisting a non engineer with a problem. 10,000 pounds of thrust is moving in a verticle path at the rate of one foot per second. This is attached to a horizontal shaft (s...
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PhysicsForums Material Properties  
04:59 27-Jul-07   [Replies: 3, Views: 76]    By: Unnamed
Hi, I need to use a load deflection curve to determine the material properties of a elastic material. The stress strain is far from being linear. Any suggestions??...
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PhysicsForums Military Standards / ANSI / Mil Spec  
11:32 26-Jul-07   [Replies: 7, Views: 226]    By: Unnamed
Does anyone know of a good cross reference that shows the descriptions of different Military Standards / ANSI / Mil Spec descriptions? Most web-sites that sell Mil Spec / ANSI hardware can tell you...
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PhysicsForums Rankine Cycle: boiler feed enthalpy  
04:00 26-Jul-07   [Replies: 0, Views: 68]    By: Unnamed
Please help! I am wrestling with a Rankine Cycle question in which the condenser operates at 0.2 bar and the boiler feed is at 20 bar. It is stated: "The condensate is not undercooled but retu...
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PhysicsForums Fluid Mechanics Problem  
17:17 25-Jul-07   [Replies: 6, Views: 209]    By: Unnamed
I'm stuck with this problem, can any one help me please? Two large tanks are connected by a cast iron pipe 50mm in diameter and 50m long. There are eight 60 degree and four 90 degree bends along th...
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PhysicsForums tubes pressure  
06:06 25-Jul-07   [Replies: 0, Views: 83]    By: Unnamed
Hi, For fluid mechanics. Does anybody knows where can I find exercises for multi tubes that combine together and then we have to calculate the pressure at certain points?? Thanx......
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PhysicsForums Snug Fit  
03:29 25-Jul-07   [Replies: 4, Views: 150]    By: Unnamed
What is a Snug Fit? Where is it used? I have come across slip fit, press fit..... But not snug fit. Please explain. Thanks Ana...
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