Monday, October 31, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


unsteady state convection heat transfer

Posted: 31 Oct 2011 12:41 PM PDT

how to conduct unsteady state convection heat transfer experiment...????

10 companies that manufactures air condensers

Posted: 30 Oct 2011 06:59 PM PDT

i want names of 10 companies that manufactures air condensers. Please someone see to this

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering


DIY silicon crystal pulling machine

Posted: 31 Oct 2011 04:57 AM PDT

Hello,
I am not sure of this is the right place for this question but anyways.

I am planing to build a miniature silicon crystal pulling machine. The equiment I have is 7kw induction heater. How do I go about this? Any pointers?

CrazyEngineers Forum - Other Engineering Trades

CrazyEngineers Forum - Other Engineering Trades


Engineering saves marriages!?

Posted: 31 Oct 2011 09:19 AM PDT

Sunday, October 30, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Tire Sprayer for Traction Boost on Ice/Snow

Posted: 30 Oct 2011 01:59 PM PDT

Now that the huge storm has hit the US NorthEast, with a huge round of road accidents including fatalities, it's yet another reminder of the perils of winter driving.

I recently came across a discussion forum on older Camaros which mentioned that the '69 Camaro had an option for injectors built into the wheel wells of the car, which could be triggered by a push of a button to spray a liquid onto the tires which would boost traction on ice and snow.



http://www.chevelles.com/forum...owthread.php?t=72219

I'm wondering why this technology did not survive to be included on newer cars, perhaps even in a more evolved form.

Imagine if such a tire-spray system were integrated into the Anti-lock Braking System or the Stability Control System of a modern car. Then as soon as the vehicle began to lose control while driving on ice, the spray nozzles would automatically trigger to immediately spray the tires with the traction-boosting agent, hopefully saving the car and occupants from disaster. Not only could your own car be saved, but perhaps even the next vehicle to encounter the same patch of black ice would also benefit from your having already smeared that patch with the traction-boosting agent.

The traction-boosting liquid used in the '69 Camaro was called "V75 Liquid Tire Chain", and was made by Dow Chemical.

There are some tire spray products currently on the market, like "Tyre Grip", whose main constituent is Pine Resin, which apparently becomes sticky in contact with moisture:



I'm sure that natural compounds like this could be improved upon, to instantaneously provide radically enhanced adhesion between tire and ice, even in very cold weather.

Considering that this technology was first engineered for use in cars nearly a half-century ago, I'd imagine there have been enough technological advancements since then to warrant another look at this idea.

When you look at how Anti-lock Braking and Stability Control have become highly desired and even required features on cars today, I would think that an effective traction enhancement system would also be a very attractive thing to provide. Like airbags, it could in some cases perhaps mean the difference between life and death.

What do you all think of this idea? Comments? Analysis? Critiques?

ansys software

Posted: 30 Oct 2011 06:48 AM PDT

Where can I download the ansys software?

Saturday, October 29, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Schenck Process spray bars

Posted: 28 Oct 2011 10:09 PM PDT

Hello fellow engineers. Am selasi and currently a site engineer on a project in west Africa. I just joined this website which am really impressed with trend of discussions.

I have this problem currently on site and need suggestion to handle it. I will like to know if spray bars for Schenck Process Double Deck Horizontal Screen (SLK3061) are permanently fitted to the main frame of the screen or is independent of it. I believe some of the engineers in this forum may have worked on this equipment before and will be ready to help me out.

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering


my final year project inquiries

Posted: 29 Oct 2011 10:18 AM PDT

hello every one here,i hope u r doing well>>>> this sem i am going to apply for my final year project,,,,,, and actually i am confused which area of research i should to choose. and my question is any relationship between the final year project and my future job?? my faculty offer some areas of research like environmental( waste water and water treatment) , reaction, modeling and optimization, so pls guys i need some advice to overcome this situation....






carburizing of medium carbon steel

Posted: 29 Oct 2011 01:56 AM PDT

Dear All,
Let me introduce first. I am new to this forum. Myself Amit from India. This sounds real crazy to do carburizing for a medium to high carbon steel but we have a requirement to do carburizing on SAE1065 material.
Our aim is to enrich the carbon on the surface to 0.9 to 1%. After that this materials will go for a surface coating process which requires carbon underneath the surface.
Can anyone tell me what is the method to check the ECD for this kind of carburizing? Whether microhardness traverse method will be able to distinguish any hardness deflection point correspond to ECD?

Regards
Amit

CrazyEngineers Forum - Other Engineering Trades

CrazyEngineers Forum - Other Engineering Trades


Do-160

Posted: 28 Oct 2011 06:21 PM PDT

Hi guys,
I've question regarding the Vibration Section of DO-160. The document states that, in addition to the demonstration that the natural frequency of the component has not changed at the end of tests and the tested component would still be able to meet its performance standards, it must shown that no structural failure has occurred. Could anyone tell me if would be considered acceptable to have a cracking propagating during the vibration test but not sufficient to change component's natural frequency nor affect its ability to meet its performance standards ? Additionally, considering that the vibration testing would concentrate the vibration levels that component would be subjected to during its entire life in a 3 hour test period, would be acceptable to replace, during the tests, a deteriorated bushing or seal due the exaggerated effects of the vibration and continue the testing ? I would appreciate your help on this.

Friday, October 28, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


A Plan of a Hybrid Car to Help the Environment

Posted: 28 Oct 2011 02:43 PM PDT

Hello everybody. I've worked on a plan of a hybrid car for about a year. My intention was to help the environment. I started a review on the existing possibilities and I found out the electric vehicles are interesting options. So I focused on removing their disadvantages and I reached to the present document. I hope to improve it by the help of experts. Also I like a company or person would determine to build it; because I cannot by myself. I'm just a man of theory without any equipments. However, I will keep contacting to active companies about my plan with the hope of realizing it someday. If this plan would gain attention from the people who care about the environment and future of the planet, that would be a contribution of mine to the world. You can download my plan, a 60-pages PDF file from one of these links: viXra.org e-Print archive, viXra:1110.0049, On Developing a Powertrain in a Hybrid Car with Electricity and Compressed-Air Propulsions On developing a powertrain in a hybrid car with electricity and compressed-air propulsions.pdf - 4shared.com - document sharing - download Cheers, MM

Thursday, October 27, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Air conditioning: what actually is air change per hour?

Posted: 27 Oct 2011 06:38 AM PDT

what actually is air change per hour. The statement written in book is not at all understandable. So please explain it in simpler terms

CrazyEngineers Forum - Other Engineering Trades

CrazyEngineers Forum - Other Engineering Trades


A Fruit Label that becomes the cleaning soap!

Posted: 27 Oct 2011 02:10 AM PDT

Quote:
Designer Scott Amron, who never ceases to amaze with his endless progression of crazy ideas like the Keybrid, Brush & Rinse and my alltime favourite, Die Electric offers up the Vanishing Fruitwash Label to solve this intractable problem that has challenged designers forever.
Endquote

Scott Amron's Fruitwash Label Solves Huge Design Problem : TreeHugger

Wednesday, October 26, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


compression ratio in CI engines

Posted: 14 Oct 2011 08:55 AM PDT

Why is the compression ratio in CI engines high??????

Tuesday, October 25, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


cams

Posted: 25 Oct 2011 01:42 PM PDT

1. Any idea what is the base circle diameter of the cam profile used in operating valves of IC engines?

2. How much is the lift of valves normally in IC engines?

technical events

Posted: 25 Oct 2011 08:36 AM PDT

Hey guys, I m a mechanical Engg. Student and I want some new ideas to organize technical events in my college related to mechanical field only.
Please help by suggesting some events.

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering


Looking for dendritic solidification video footage

Posted: 25 Oct 2011 09:49 AM PDT

I am looking for video footage that shows real-time dendritic solidification in metal (preferably in steel) for a documentary I am working on. Does anyone know if such footage exists? Or can anyone point me to a metallurgist expert who may have such footage?

I found two videos on YouTube. One is a simulation video, but I am hoping to find a real-time video (not a simulation). The second is a real-time video, but it appears to be copper (not steel).

Any help would be appreciated. Thanks.

Dendritic solidification in Fe-0.11 wt% C

Dendritic Solidification - YouTube

Monday, October 24, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


IC engine camshaft

Posted: 24 Oct 2011 11:05 AM PDT

The cams used to operate inlet and exhaust of IC engines are designed for which type of follower motion - SHM or constant acceleration/deceleration?

I think they are designed for constant acceleration/deceleration

Any problem if SHM motion is implemented?

Please comment.

Magna Parva and Glasgow 'Varsity develop Ultrasonic Drill for Mars exploration

Posted: 24 Oct 2011 08:57 AM PDT

Sunday, October 23, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Look mom, no wires - Wireless Bicycle Brakes!

Posted: 23 Oct 2011 02:16 AM PDT

Saturday, October 22, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Structure & Ray Diagrams in Gearbox design - suggest book

Posted: 22 Oct 2011 02:16 PM PDT

Hi
I am a student at Pune University doing my B.E. in Mechanical Engineering in the 4th year.

Can you please suggest a good book that will explain neatly the process of drawing Structure Diagrams & Ray diagrams for designing multi-speed Gear Boxes

I am current using the book written by RB Patil & have got totally confused. Some diagrams are symmetrical while others are not

Please suggest a textbook that is easily available in the shop & will explain the proceducre to draw diagrams correctly.


Also when I Googled Ray Diagram and Structure Diagram of gear boxes, more than 99% of the result I got were from Indian Colleges and their syllabuses & question paper. What are Ray/Kinematic Diagrams & Structure Diagram called in colleges outside India, like UK or USA

Please help me. My exams start from next month & I have to score a distinction. Please help me. Please. Please. Please

calculation of lift and drag forces

Posted: 22 Oct 2011 11:26 AM PDT

Anyone please help on how to calculate lift and drag forces on flapping and sinusoidally pitching finite wings.

21 MPH thrills and (Caution) Spills!

Posted: 22 Oct 2011 08:51 AM PDT

Thursday, October 20, 2011

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering


Which Aluminium Alloy would you use?

Posted: 19 Oct 2011 11:39 PM PDT

Please suggest Alloy/Temper for:

Aluminium Extruded Pipe

End-Use: Rollers for Flexo and Roto Grauvure printing machines.

Appreciate your help. I have been trying to figure this question out.

Wednesday, October 19, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Mechanical Morphing Helicopter Airframe/ Rotor Disc Control

Posted: 19 Oct 2011 08:23 AM PDT

Independent inventor; mechanically inclined; worked on cars and obsessed with mechanical problem solving. Had an idea 15 years ago, but it was put on the back burner due to life. I have a little back ground in precession machining. During my first deployment to Iraq, started reading books on aerodynamics brought the idea off the "burner". Spent the last 6 to 7 years tweaking this design
. It is a mechanical morphing airframe or in-flight reconfiguring airframe with a "human interface" concept to assist in mechanical control. The HIR airframe uses "human interface" along with an offset axis gimbal joint to "morph" the airframe thereby tilting the rotor disc for directional control. This slightly manipulates the center of gravity. Charles Seibel was first to design a helicopter with human interface control. The GEN H4 uses a gimbal, yet it is a fixed pitch coaxial design. You can track it progress at: http://envisionrotorsystems.blogspot.com/
Or at You Tube: "davh72able"
I am receptive to all comments. As always when I finish the small scale RC prototype, if it crashes I will still post the video. It’s already crashed once...weight distor was off a bit and the airframe developed a torsion flex. You can read the comments of pilots and aero-engineers if you go to most helicopter forums and search for "Morphing airframe" or "In-flight reconfiguring airframe" or my user name "davh12". Good to read in all of your topics. It is very interesting. I am not a certified engineer, just an "uncertified basement engineer". I do not let that title hinder what I do....in fact I think garage and basement tinkerers have an environment better suited not just think outside the box, but apply themselves in the same manner as well. An inventor must be willing to ask themselves "where does practical application end and novelty begin? Then answer that question honestly. How will your idea affect the market? Will the change be positive and how will it benefit everyone? I presented my design to DARPA and now Bell Helicopter is taking a look...no promises though. DARPA process and results are posted on my site.

Regards,
Dave

Tuesday, October 18, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


six stroke ic engines

Posted: 18 Oct 2011 09:40 AM PDT

Is any one aware of some new innovation or design that has been made regarding the six stroke engines?

or if anyone has any useful idea, please share.

For the Die Hard Bikers - The DIWHEEL

Posted: 18 Oct 2011 08:40 AM PDT

Quote:
Students and researchers in the School of Mechanical Engineering at the University of Adelaide have developed a novel electric two-wheel vehicle, affectionately known as EDWARD (Electric Di-wheel With Active Rotation Damping), that allows a driver to travel in a conventional upright position and, for the more adventurous, in an upside down position. The di-wheel consists of two large coaxial wheels that completely encompass an inner frame containing a driver. The inner frame is suspended within the wheels in such a way as to allow the inner frame to rotate freely. EDWARD employs the latest drive-by-wire technology (used in modern aircraft) and control theory to aid the driver in piloting the vehicle.
End Quote


Feed Back with a vengeance!

Posted: 18 Oct 2011 06:34 AM PDT

Nissan's Leaf Car can be used as stand by power for the whole house for two days even with heavy loads.
A nice case of give and Take!
Nissan Rolls Out a System that Lets Your Electric Car Serve as a Backup Battery for Your House | Popular Science

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering


DIY steel silver alloy

Posted: 18 Oct 2011 10:24 AM PDT

Hello everyone,

I want to alloys steel with silver or gold or platina. How can I do this?
I read in a book that by making a battery using a silver electrode and a steel electrode the result would be a silver steel molecule wich would settle at the bottom of the battery as sludge after each time the battery is recharged. Is this right? What happens in a steel silver battery if it is recharged, is there a steel silver molecule as a result?

If I wanted to melt the two metals together using a 7kw induction heater how would I go about to blend these two metals? Would I use a flux? what crucible would be resistant to the alloy and flux? How do I make them homogenous? How do I go about the whole procedure from start to finnish?

Mr Alloyau

Monday, October 17, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering


Grinding software

Posted: 16 Oct 2011 11:58 PM PDT

Hi*


Can some one help me for find a grinding software? I need a software that be able to program five axis grinding.

We can't do the grinding machining with milling CAD/CAM software. so please help me to find and buy a grinding software that be able to create five axis grinding machining.


I am wait for your help.


Thank you

Duel Fuel Engine - An update from Automotive Research Association Of India, Pune

Posted: 16 Oct 2011 09:53 PM PDT

ARAI took the lead in developing a dual fuel automotive engine in India using its pioneering experience and strength in development of CNG and Diesel engines.

A report:

https://araiindia.com/cpanel/Files/N...e_July2011.pdf