Engineering

A Chilean LATAM Airlines LA800 flight from Sydney to Auckland NZ suffered a ‘Technical Event’ on Monday that sent the 787 Dreamliner jet plunging 500 feet in an instant, injuring some 50 passengers, 12 of whom needed hospital treatment on arrival in Auckland. https://www.nzherald.co.nz/nz/latam-flight-from-sydney-to-auckland-nose-dives-passengers-and-crew-thrown-into-ceiling/MBE4BNFIFJD73DDZJ3USYZYL5M/ Passengers subsequently told reporters that the pilot had apologised to them after the incident, and said that he had lost control of the plane after “All the gauges went blank”. The nature of this technical event appears to be related to an AD (Airworthiness Dir…

Applying the lessons from bats... What would have determined the 90 degree disposition of the parabolas signals and the 180 degrees one respect to the other, instead of straight at the ends of the 'ears tube' ?

Salicylic acid is produced through Kolbe - Schmitt process - using phenoxide + CO2 -> sodium salicylate and then subsequent acidification to give acid. In these steps I need to mix a powder sodium salicylate at 150 Deg C with Water at 25 deg C to get a slurry. What kind of mixer can I use for the same ? I can use a stirred tank but to calculate the residence time I would need to do pulse experiments, which is not possible to do before hand.

Hi all. Bought several tiny nebulizers to humidify a germinating room. Testing one for two weeks, ceased to produce the fog. Do not know how to revive. By cleaning sort of worked at half production for an hour. Read about and found : ---> https://www.electroschematics.com/mist-maker/ But the surprising specification says "5um" "740 holes" So I projected a laser to the stainless piezodisc and yes, shined trough the supposed-to-be holes in metal (5 micrometres per above) invisible to eyes or magnifying lens. Confirming it is a microperforated disc. Never saw a piezoelement perforated. How is the principle of operation of such nebu…

can we reviewers add references in a report ? (is it the done thing? and are there cases which render the referencing as mandatory action?

Though there is a lot of importance given to renewable energy but is it really not the solution to energy problem because nich market and a tough competition with existing fossil fuel industry it is still expensive Is not 100% reliable

The Samster just asked for a whopping 7 billion investor handout: https://www.msn.com/en-us/money/companies/sam-altman-wants-to-raise-up-to-7-trillion-thats-uh-a-lot-of-dough/ar-BB1i3ay5 C'mon... This is clearly bullshit. I can see the "plan" from a billion miles away: 1. Raise trillions 2. Pay himself billions 3. Fuck all, laughs in people's faces as expensive house of cards folds after the smoke clears 4. Open golden parachute to the tune of tens if not hundreds of millions ON TOP 5. Maybe even just repeat that same shit again somewhere else afterwards- It's not as if he hasn't done all this failing-upwards crap BEFORE This is as transparent …

What would be the practicality of using railguns to send supplies into space? The way a railgun works is by using magnets to propel objects at really high speeds so a railgun would no doubt be able to propel a spacecraft at escape velocity and by doing so, it would eliminate the need of fuel to launch spacecraft into space. Such spacecraft would have to be unmanned as the acceleration of a railgun would be too much for people to withstand, they would be squashed like pancakes, but I see no reason why supplies couldn't be sent that way. So the idea is that spacecraft containing supplies could be launched into space and then retrieved by personnel on the ISS, Im wondering h…

I am an Indian inventor. For a long time, I am continuing personal research about a new kind of wind power generation system. Recently, while searching net, I have found out that the necessary machinery is already available in market. In short, the machine now can be built easily. At present, I have completed the CAD drawing and done some ANSYS simulation testing. As per the latest simulation where the RPM was set of 3600, the torque was found to be around 1.52 Newton-Meter for a machine of 35 cm diameter and the input wind velocity was set to be 6 m/s. For me, this is promising result and I can say that no wind turbine in anywhere around the world of that little diamete…

To the best of my knowledge, conventional combustion requires oxygen. When you make a fire in the fireplace you need oxygen for it to burn. You need your fuel source which might be wood that you're burning in the fireplace, you need the energy to ignite it which can be produced by rubbing sticks together although in this day and age you would use matches or a lighter, and you need oxygen which on Earth is abundant enough in the environment. In a different environment without oxygen, such as on the moon, it would not work. You would not be able to start a fire in a fireplace on the moon unless you're able to provide the necessary oxygen somehow because on the moon there is…

Please help me for this projet with Arduino code

As long as the slower ground-based intercepting supersonic projectile is sufficiently forward of the incoming missile, it only needs to arrive at the same time, somewhere along the hypersonic missile's predicted trajectory. Is that correct?

Would it be possible to make a very compact and lightweight steam engine powering an electric generator that can be taken back country camping and used to keep lights and other devices charged the entire time just by looping it into the campfire? And could it be expanded to being hooked into the wood stove of a cabin to keep the lights and other devices running as long as there is a fire in the stove? How cheaply could such a generator be made while still producing an acceptable amount of power, such as charging a smartphone at full speed in the small camping version and possibly running a full cabin's lighting and a computer and Starlink internet connection in a larger v…

I've heard of the idea of building a spacecraft that produces an artificial gravity well in front of it. As the spacecraft falls forward the artificial gravity well moves forward with it so that the spacecraft will be continually chasing the gravity well as it moves forward with the spacecraft creating a carrot and stick effect. We might even be able to break the light speed barrier with this concept.

Hi. Choking a carburetor to start an engine increases the fuel amount or ratio to air. It is done because the ambient air is cold or because the engine metal block is cold ?

I developed and prototype for an invention for collecting energy from the sun. It stores a maximum of .6V. It is very inefficient and I feel as though the prototype can be improved dramatically. (A novel invention for collecting energy from the sun.) <- real title

Greetings. Am trying to come up with a mechanism (manual or motorized) that can vary the electrical length of a conductor. Have some pending attempts to try and would like your suggestions. A circular electric conductor has its end terminals A and B at fixed positions. Need some way to vary the electrical conductive length from A to B in a 1:10 ratio. Like from 10cm retracted, to 100 cm. expanded circumference. (varying its diametre) The ideal would be telescopic elements that do not exist in curved shape. How would you do it ? 🤔 Thanks.

maybe cracked iphone.please its important for me. is there a device that blocks radio waves and microwaves completely please? maybe to build a device if there is not please.

The “Continuum” assumption in propulsion and fluid dynamics is that their atomic structure will be ignored and they will be considered as capable of being subdivided into infinitesimal pieces of identical structure. In this way it is legitimate to speak of the properties of a continuum – e.g., density, pressure, velocity – as point properties. Now, this assumption needs to be modified, for example if the “Non-Continuum” assumption is that the atoms/molecules/particles ( although fundamental particles are modernly understood as point masses, let’s ignore this issue for now because most of the reaction in propulsion and fluid dynamics is chemical and not Atomic/Nuclear) can…

Greetings. When a LED specifications shows a 30 milliamperes maximum current and is driven to a third as 10 mA or even less, the life expectancy is considerably extended and its behavior as a panel indicator is still fully useable. Is a laser diode with a maximum current specified as 30mA also perform as a beam emitter at a third of the current (10ma) or less; or lasing is impaired and there is a minimum current needed ? What is the term specified for the current that starts to produce lasing ? If a laser diode is needed in operation 365 days non-stop; would underpowering it extend its life equally as happens with a LED ? What type of visible light laser…

Hi all, I'm working on a project where I want to evaluate the performance of different microstructures of a material as candidates for an atmospheric entry heat shield. I have thermal conductivities for these materials, as well as atmospheric conditions and a required temperature gradient across the heat shield, so I'd like to make some rough calculations for the thickness required of each material. From there I can make comments on the size and weight required. I'm not sure how to calculate the heat flux through the materials in order to determine their thickness, does anyone know how I might go about that? I know that I'm not taking a lot into account (like ab…

Scenario; A room has a temperature of 10c and high humidity. We want to increase the comfort of the occupier. Is it generally energetically more economical to bring down the humidity or warm up the room a few degrees to increase comfort?

Many parts of North countries tend to have harsh winters. In addition to that in many villages tend to have bad heating systems which would make living in this area hard for the people. You have to design an efficient heating system that will be sustainable for years and will be affordable for the people considering that electricity tend to be more expensive in this places. Efficiency- a system that would produce heat the most efficient and provide explanation/evidence Affordability- total price of the system should be low enough to be done by the government for each village or be purchased by the village instead Sustainability - explain how this design wi…

hello what is current in capacitor 4.7uF and 3.3uF which will have more current

Hello How diode add voltage 1 diode give 111v and two diode 221V how diode add voltage