Recent content by grey

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    Transient Thermal Analysis in Ansys (APDL)

    Hi, I have to model a transient thermal problem in Ansys. I just need an outline of how I should proceed. The Problem: I am trying to model the cooling of a solar collector reciever tube from 150 degree celsius to ambient. My attempts have involved the following: 1. Initial condition...
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    What Volume of Ethanoic Acid is Needed to Neutralize 25ml of 0.1 M NaOH?

    Hi, I came across a problem, which I might have solved a few years ago when I had studied Chemistry, but now I am totally stumped. Would appreciate some quick solutions. I have 25 ml of 0.1 M NaOH, and a volume of 0.1 M of Ethanoic Acid. What volume of ethanoic acid would neutralize the 25...
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    Optimizing Front Wheel Losses in Rear-Wheel Steered Vehicles

    wow! thanks guys for the awesome posts... but we seem to have a missed the point slightly. While all of your posts give me the necessary basis for choosing a type of system, they miss one of the key things i was interested in... the affect of rear wheel steering on the front tires' lateral...
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    Optimizing Front Wheel Losses in Rear-Wheel Steered Vehicles

    powered by an electric hub motor (also rear wheel), and yeah...there's supposed to be a course which includes some turns
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    Optimizing Front Wheel Losses in Rear-Wheel Steered Vehicles

    I think it is because of stability, and obviously, danger. Apologies danger...but you get the point, right :-P Anyway, i have a few interests in making it rear wheel steered: 1. I want all wheels inside the body - aerodyanmics 2. The driver will almost be supine with his knees just about...
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    Optimizing Front Wheel Losses in Rear-Wheel Steered Vehicles

    I agree with what you guys have said. In fact, I have myself noticed the difference in turning while going forwards and in reverse. But, aside from the instability, is it 'nice' on the tires (nice having the connotations i have described in the original post)? I mean, obviously there are...
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    Optimizing Front Wheel Losses in Rear-Wheel Steered Vehicles

    I want to know a little about rear-wheel steering mechanisms. Basically, my interest is in the relative losses (due to slip angles) on the front wheels of these vehicle...whether they would be expected to be more, and if yes how? In the end, i want to design a steering mechanism for a 3-wheel...
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    Flywheel Energy Storage and small engine

    Thanks uart This is because the inertia of the flywheel opposes engine operation, right? So, practically (without experimenting) the engine might not start at all? In this case, suppose I have the engine already running at 4000-5000 rpm (max torque)...then how do i proceed with the same...
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    Flywheel Energy Storage and small engine

    Thanks for the reply guys. Ok, back to the issues: 1. Charging. I have the engine curve available. http://www.honda-engines.com/engines/gxh50.htm how do i calculate it? asking because the torque keeps on changing (in a function which i don't know) so that i don't have an expression for T...
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    Flywheel Energy Storage and small engine

    I posted this on another section, but got no replies in three days...so thought maybe I'd had posted in the wrong section...apologies. I have an idea pertaining to energy storage in flywheels, something like they do in the KERS, and need assistance here... Ok, my idea involves using a...
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    Revolutionize Energy Storage: Utilizing Flywheels for Efficient Power Generation

    I have an idea pertaining to energy storage in flywheels, something like they do in the KERS, and need assistance here... Ok, my idea involves using a flywheel of around 10 kg (steel) with I~1 kg.m^2, to be charged to an RPM of around 7,000 RPM. This allows E = 0.5 x 1 x (7000x2x pi /60)^2...
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    How Does Thrust to Weight Ratio Impact Engine Efficiency?

    i think for a 'normal' IC engine, the starting point for the efficiency would b the Otto cycle. lots of assumptions there...i think it ll give a very rough guess in terms of the proposed compression ratio and the temperatures you would expect. don't know if it applies to that, but you might make...
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    How Does Thrust to Weight Ratio Impact Engine Efficiency?

    wow...the idea seems really cool (at least to me) but, i think cyrus has a point here...its just a drawing (and obviously a vague explanation). you might have done calculations for power, efficiencies, and a whole lot of stuff (that i often don't understand)
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    Components of Fuel System for Single Cylinder Engine w/o Carb & Above Tank

    thanks guys for the replies dr dodge, hadn't heard of this concept...looking into it anyway, if i have the same configuration but instead of the injector nozzle, i put a carburetor, would i still need the pump and the regulator? because my understanding on how the carburetor works is that sucks...
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    Recommend best book on fluid mechanics

    Don't think it's the best around, but the one by Cengel and Cimbala is also quite good i used both this one, and the one by Munson/Young
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