Engineering

Does anybody here know of the method for engineering problem solving called, TRIZ? TRIZ - Wikipedia

Hi Dear, I have a single-component (Z-Axis) magnetometer with 60nT resolution. I want to calculate the maximum distance that this magnetometer can detect an N52 magnet with a volume of 1 cm³. So I used the following formula and inserted the values, and finally calculated the Z: Br = 1.47 T (for Magnet N52) B= 60 nT (magnetometer resolution) L=W=D=10mm Z=? My answer => Z= 1.579 m Keep in mind that I intended to solve this problem in the simplest possible way; the angle of view of the magnetometer is perpendicular to the magnet plate. My question is whether I have chosen the right formula? or do you suggest another solution for it.

While the efficiency loss due to the reciprocation of the pistons in an typical automobile engine are well known, what if the engine were mounted horizontally, and laid flat with it's pistons arranged to move fore and aft and in alignment to the direction of the vehicle? Would the inertial mass of the pistons/rocker arms moving backwards, and now in alignment with the vehicle motion, cause a slight gain in overall velocity to the vehicle due to simple momentum transfer? While the return piston travel would cancel out any forward velocity gain, would that not essentially remove the reciprocation losses as found in a normally mounted engine, with the piston travels not i…

I think a paying fusion technology is inevitable. In fact, I'm going to argue that it could be happening right now, given the right investment. Even with the the old Joint European Taurus (JET) that first lit up in 1983. The JET holds the current record for Q, the input / output equation, with 24 MW in and 16 MW out, a net deficit of 8 MW. So how could be made to pay? I think you could make that pay by selling the waste heat in a district heating scheme. The 24 MW input will produce about 24 MW of waste heat. The 16 MW output will probably have produced nearly 50 MW waste heat, in the process of generating the electricity. So you're looking at about 75 MW of …

A week ago we had a moderately severe storm in the UK which lefts tens of thousans of properties without electricity. A week on and there are still thousands stranded. Watching the TV pictures of the emergency vehicles, I wondered what would happen if they were all electric ? More precisely how would they be recharged if there was no mains power available ? There are obviously not enough generators available to replace supplies to even the most needy as nursing and care homes went without electricity for nearly a week. What might happen or be needed if we had another really severe storm of the magnitude of the late 1980s and early 1990s ?

So I was wondering how you would make a cross sectional area graph in excel of a craft from Kerbal Space Program. A reference part would be a start I think and then get the height and width. Then the issue is finding the area of an unusual shape like the mk2 fuselage and the wings.

...... Hi. What if we build hundreds of large solar reflectors that can then focus sunlight on a solar sail space craft. How many square miles of sun reflectors would be needed to accelerate a spacecraft at 1 g, on lets say 100 tons to 90% of the speed of light in lets say 3 years ? Regards from jlivingstonsg .....

I guess this is sort of an engineering question. I read in the Washington Post today about how the semiconductor chip shortage will hinder Biden's plans to have 50% of all new vehicles be electric by 2030. As I was reading the section below, something jumped out at me.... Two thousand chips?? I seem to be missing something here. The amount of systems that need control in an IC engine would seem to me to be greater than with the electric car which is, in its mechanical essence, considerably simpler. (this is one reason why electrics are touted as bringing an era of far less vehicle maintenance and longer road life). Basically, you have an electric moto…

Just been comparing the net present cost (NPC) of my previous domestic combined gas and electricity costs. The last quarter - December 2020 to February 2021 Historically a fairly conventional gas boiler and hot water domestic heating. Electric lighting and sundry domestic power requuirements. 2016 Gas boiler replaced by an air source heat pump. Combined gas and electricity costs. Old system NPC cost (ie bills would have been at todays prices) ~ £560 Current system actual costs ~ £660

Two weeks ago, my carry on worked perfectly. But last week the detachable wheels stopped rotating smoothly, when I tried to glide my carry on. The wheels budge JUST A TAD when you push them hard, but it should be EFFORT LESS! Pls see two pictures below. I see nothing jammed in the wheels. I ventilated wheels with my hairdryer. I hosed water into wheels. But nothing fell out. Wheels are still stiff! Why? I bought this carry on for $350 USD. It is out of warranty. I can't afford buy new one.

I'm trying the build a reusable mask with a nose bridge that doesn't break or where-out as fast. I've been looking into using nitinol wire but it has a low fatigue strength. Do anybody have an idea of a metal that has a high fatigue strength. Aluminum might be the best option out there but I feel like there should be something better.

For myself I never understood the relationship of Brown and Blue wires in the BS1363 plug, which Britain adopted from the EU standard. It may cost money, may also infuriate some, but I feel that Red for live, and Black for neutral makes more sense. Would it not make more sense to switch back to those colours, is it not more instinctive ?

Hi. We want to use CAS 63148-62-9 (5 cSt) to lubricate linear motion systems in food processing machines. There will be no direct contact with food. We are trying to reduce the cost of construction. There are a few questions. Will dust and dirt stick to CAS 63148-62-9 ? How does this one behave in relation to different food acids? Can microorganisms grow inside this oil or on the surface (can come from food with active ingredients)?

Hi. Bought this over 20 years ago at a 99 cent store just because was different. Took a short video but became too large and refused to insert here. Well, has a squeezable handle instead of an striker trigger as most. Emits several sparks in about 5mm of squeezing; looks like ----> https://www.amazon.com/Ozeri-OPL1-R-Piezoelectric-Kitchen-Flameless/dp/B01MSKDG51 Is there a major difference in operation principle ? Squeezing instead of striking the crystal ? I presume squeezing bends the piezo crystal.

I have an electric blanket which works on the bassis of halves i.e. my wife and I can control our respective half of the bed, very much like how an induction hob works, it really is night and day. This system as such requires two power outlets to plug into, and whilst we have two available nearby power outlets in the wall, we use a single power plug and I was wondering how safe this was ? The reading I get from one plug (i.e. half of the electric blanket) on the favoured medium setting is: • Volts : 233.8 • Amps : 0.212~0.267 • Watts (hi) : 0.1 • Watts (low) : 61.3 If you could imagine a doubling of this on one plug socket, how safe would this…

Hi. Say in the last 20 years; from computers using 150 Watts and now barely 10; light bulbs from 60 watts now using 9 Watts, televisions from consuming like 150 Watts and now about 12W; refrigerators and water heaters with better insulation, heat pump technologies advancing... Even a few solar panels implemented contribute a bit for less grid consumption. Power plants have increased their generation or decreased ? If increased, should be for industrial/commercial consumption, is it ?

Did you play with matchsticks once again? Here comes the fire brigade, with tools of adequate size. Many aeroplanes, especially military cargo planes, have desirable performance as a water bomber: sturdy, good capacity, good climb rate, reasonable flight speed... The Bombardier 415 adds the precious ability to refill its tanks by scooping water from sea or a lake: http://en.wikipedia.org/wiki/CL-415 and I should like to explain how more usual airframes can obtain this ability. The plane flies a few metres above water and lowers a boom that scoops water to the tank(s). The boom is articulated at the airframe. Downlift comes primarily from the steering winglets. …

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Perhaps the mining of shale deposits isn’t the enemy of energy transition. Since 2005, hydraulic fracturing has permit the exploitation of gas and oil confined in shale deposits. These shale deposits produce gas and light liquid hydrocarbons. Some studies have shown the possibility to extract heavy hydrocarbon molecules like paraffin from shale deposits by using supercritical carbon dioxide (1). This fluid is also ideal for the heat extraction from the deep deposit: its high density facilitates the heat transport and its low viscosity eases the circulation in small cracks of the fractured zone. The use of supercritical CO2 on depleted …

The preliminary report on why the UK's most recent high speed trains had to be withdrawn from service has been published. Apparently metal fatigue and stress-corrosion cracking were the causes of cracking in different components. Amazing that such design mistakes can still occur. What a good job they were found before any accidnets were caused. https://www.bbc.co.uk/news/uk-england-58494275 Hitachi train cracks due to fatigue and corrosion, report says

This is my first post, I heartily treat all users, :-) Spectrophotometr Hach DR 3900 - hangs on startup. I do not have a service manual - maybe someone has? I replaced the lithium battery on PCB and pressed the restart button - no change. Any suggestions? Regards

Good day. Read often that manufacturing solar cells (not panels !) is expensive in terms of electrical energy used. Anyone knows figures ? To make cells that produce 1 KW, how many KWh are used at the factory ? (embodied energy)

Can a pankacke wound Tesla coil, used for magnetic induction, be printed on a PCB, much like the following: I understand that the opposing tracks cancel out the magnetic field in this Bifilar arrangement, but even in parallel, does a magnetic field need to be created by a tightly wound wire, or can it be wafer thin as on a PCB please ? To be clear, I am looking to the pass photons through to small pico lights at a reasonable distance of around fifteen centimetres above the transmitter