Engineering

Driving Anger, a specific situation consisting of emotional structures of feelings and thoughts associated with anger produced during driving. I happened to know this definition by reading an article (Convolutional Neural Network and Bayesian Gaussian Process in Driving Anger Recognition) published in an open-access journal (Engineering, https://www.scirp.org/journal/eng). It is very interesting. Actually, I am not very familiar with the frontier technology to recognize driver anger and distinguish angry driving. Just interested in this saying "Driving Anger". Does anybody have the same experience when driving a car? What is your attitude towards Driving Anger?…

Hello you all! Many rocket engines pump liquid propellants to their combustion chamber, and varied cycles are used to power the pumps, the best known being: Gas generator http://en.wikipedia.org/wiki/Gas-generator_cycle_(rocket) Staged combustion http://en.wikipedia.org/wiki/Staged_combustion_cycle_(rocket) Expander http://en.wikipedia.org/wiki/Expander_cycle_(rocket) but here I'd like to describe uncommon cycles, which may be new and of my invention. ===================================================================== The first sketched cycle realizes the cracking (hydrogenolysis) in a pre-chamber of a hydrocarbon with hydrogen, which produces methane, some exc…

You've probably seen these (Falcon 9?) rocket landings before in news or on the net. When I think of the size of this thing and earth's gravity, I cannot fail to be impressed.. even though one explodes.

Hello everyone and everybody! Some rocket engines inject a small amount of a third propellant that ignites by contact with one main propellant. For instance the RD-170 and heirs start with the liquid oxygen and some triethylaluminium followed by the "kerosene". The RD-170 had little choice. Much liquid oxygen immediately quenches the many flames in its gas generator, demanding as many ignition sources, easier with the hypergolic pair. But triethylaluminium ignites upon air contact, as probably do all compounds igniting with liquid oxygen. That's badly dangerous near 500t of fuel and oxygen. I propose here to add two hypergolic propellants for engines whose …

The world energy consumption is some 150,000 TWh. The average solar irradiance at the surface level is 163 W/m^2. Assuming, quite arbitrarily, that we can harvest 10% of that by using the photovoltaics aka. solar cells, we can calculate how much solar panel would be needed to satisfy the world energy demand. The answer is 1.05 million square kilometres. While that sounds like a lot, it must be compared to the total surface area of the Earth, 510 million square kilometres. It may also be compared to the the area of the Australian desert, 1.37 million sq-km, or the area of the Saharan desert, 9.2 million sq-km. So, is the future solar? Isn't solar energy the silve…

Who would've thought that the inventions of Charles Babbage and Alexander Graham Bell would be merged and miniaturized. Now, if we could only do the same thing with the inventions of Henry T Ford and the Wright Brothers.

It is common knowledge that burning fossil fuels can be harmful to the environment. However, if we are going to burn fossil fuels I believe there are ways to do it that are less harmful. For instance, smoke stacks. With smoke stacks you don't have ground level pollutants. Ground level pollutants are more harmful than pollutants way up in the air which is why I believe factories are required to have them. However there are some machines that burn fossil fuels that will result in ground level pollutants the most obvious being cars and trucks. Other gas operated machinery such as lawnmowers, leaf blowers, tractors, etc, further contribute to the problem. As it is, they …

I have been researching the different kinds of food storage jars which reduce the amount of contact oxygen has with the contents of the jar, I found the a manual plunger style from Prepara to be the most simple, over their mechanical rivals, which use a levers or other intricate mechanisms. It's such a clever design, but since their launch demand has decreased to the point that they've begun thinning the glass containers, and now their slogan reads that only food safe BPA-free plastic touches the food (rather than only glass and food grade stainless steel), which I have a problem with, along with the prices and the fact that the one way valve mechanism cannot be deco…

Can we PRESERVE and HONOUR our DEAD ? Walker’s Casket ! For sometime I have been thinking about it and here is what I say : This is after viewing the agonizing Research by Archeologists in unearthing the past and I give below the links : It will be nice from now onwards if we can preserve and honour our dead as it should be and not leave it to chance to be counted in future. Of course many illustrious Personalities must be preserved in a much better way than ordinary folks and suitable monuments erected. We all live and STRIVE TO MAKE A MARK IN HISTORY but have to die on someday ! That FRAME OF…

I would appreciate some advice for a conceptual product. Which materials does snow not stick to or build up a significant amount?

I am curious on it

The expander cycle pumps oxygen to the chamber, and hydrogen to a higher pressure into the cooling jacket where it evaporates. Lukewarm hydrogen passes through a turbine and flows in the chamber. It gives the RL-10 and heirs good performance, simplicity and an easy start. Operation with methane was demonstrated. Though, an engine burns fewer methane moles with more oxygen moles; I propose instead to pass the oxygen through the jacket and the turbine, which enables higher pressures hence improves the performance. I compare with 400K before the turbine, 74% and 79% efficient pumps and turbines, injectors keeping 88% of the pressure - and no drop in the cooling jac…

https://www.cracked.com/personal-experiences-1848-i-work-in-nuclear-power-plant-5-insane-realities.html "A small mistake during the reassembly caused 50 gallons of thin, flammable, corrosive oil to go spraying everywhere. Another time, the control room people goofed and shut a massive valve to the cooling tower before turning off the pump. The resulting pressure caused the pipe to burst, and we had ourselves a man-made geyser. Of course, this was in the winter, so the whole thing then froze solid. Yes, I realize I'm painting a very Homer-Simpson-ish portrait of the operation. But to be extra clear: None of that put the public in danger. These are expensive pro…

We've tried mask mandates. But those either weren't enough; or weren't enforceable enough; to adequately curb the pandemic. We've tried vaccines. But we don't even know if they'll be effective against the new strains of THIS pandemic, let alone whatever other pandemic we're dealing with NEXT time. It seems increasingly like everything short of a lockdown is a half-measure. While I'm sure many people would object to lockdowns on "freedom for freedom's sake" grounds, a number of people object to them on "how the hell will I get my groceries?" grounds. And for that, we need... a pandemic-proof system of food distribution. Befor…

Hi. Picture a bunch of solar panels on a roof to generate 3KW electricity. The purpose, to heat a dwelling, nothing else. No connection to mains, no inverter to supply appliances nor lighting. Just heat. Powering a heater during the daylight hours, warming the dwelling plus heating up something that will release warmth at night time. A water reservoir works well absorbing/releasing heat, but needs piping implemented toward radiators like in some very old houses. Barrels of rocks heated by electric elements can warm air passing trough them to release warm air at nights into existing HVAC ducts. What if the rocks are replaced by iron scrap, like engine …

I am trying to remove the friction material from automatic transmission brake bands, they use a "phenolic" glue which dried for 24 hours and is then baked at 204 degrees, my question is how can I remove this "polymer" bonding agent in order to reline with the new friction material ? I have tried a gas torch and this is very labour intensive not to mention the fire risk, but it still needs to be bead blast to get the residue off, I was curious to see if there is any chemical I could use to soak them off ? but I couldn't find anything that will attack this "thermoset" material. Any help would be very appreciated

Greetings. A LED emitter can have a long life. Even longer if underdriven from specifications. Asking for an educated guess... A LED designed to operate on 1 Watt of power, if energized to 1/10W; would it last 10 years ? 100 years ? Same question if it is a laser diode.

Does anybody have a piece of information about microsatellites? I wanna know the capability they have, what kind of mission they have, will microsatellites be able to substitute the satellites we have now?

Could you fine people please help me identify this pump for a project? Im working on a movie prop with my son (got to have a hobby to pass this lockdown), it’s from the film Die Hard 3 but we’ve hit a wall looking for part. It’s a graduated cylinder which uses a rack & pinion gear to drive a graduated plunger, My first thought was a syringe pump but there are no syringe plungers with rack teeth that I can find, then I thought is it a graduated cylinder but I can’t find one with an output at the bottom. It’s definitely a real world item but I can’t find any details. thanks in advance Rich

If you take a spur off the ring main to a suitable external socket on an outside wall of the house, can you spur off that to put a socket in a nearby garage? What would be a UK-compliant arrangement under current regs if that isn’t? The goal is to have a weatherproof socket on the outside wall and power to the garage, which is a few metres away. Expected power demands will be a tumble dryer, freezer on constantly, and whatever power tools are being used.

Too many times are things too good to be true. It seems to me if it were really true they could use materials like graphene. Or make such bold claims as the beginning of perpetual energy if it charges in as little time as they say. If it is real how many years till it is used? Or widespread?

Hi, I installed manually a LPG tank and other devices for my car but the mixer[air/fuel] Then i thought what will be if i connect the pipe of output of LPG into the Air filter box directly without any mixer, But i cut wires of the TPS and put one resistor instead of that that deceive the ECU and the ECU think the Throttle is always closed and command the Injector to inject fewer fuel [at all speeds] But I connect the TPS to a series of devices that inject LPG instead of the rest needy fuel[petrol] Is that Okay !? Means at once there be Petrol/LPG/Air mixed together into the engine

I am trying to figure out the difference between a rheostat and a bridge rectifier. I tried Wikipedia, a bunch of resources and even a few videos, such as this one (url deleted) but I’m still not 100% sure about the difference. Can somebody here tell me like I’m 5 what the difference is.

Several countries have tried using Bluetooth to measure soical distancing distances. None (to my knowledge) have found a successful method. So what are the problems they are facing ?

would you like to share your opinions in convenience of title? let us learn which engineering book you mostly enjoyed,pleased to read and why.