asdfadsfgfdda

6 ms·

1.
by asdfadsfgfdda 24d ago
One example is the effective prohibition on spraying pesticides by air, including drone. Drones allow lower pesticide use than current, legal practices
2.
by asdfadsfgfdda 3mo ago
On a typical day, the atmospheric pressure varies by maybe 150 Pa, or 3 psf. By definition, that’s 137 dB. But it’s imperceptible because the rate of change is so low.
3.
by asdfadsfgfdda 3mo ago
It’s not accurate to convert .1 psf to dB because it’s an impulsive shape, not a continuous tone. And human loudness perception depends on how smooth (low frequency) the shape is
4.
by asdfadsfgfdda 2y ago
One slight advantage: you can store liquid nitrogen. So, you can use cheaper electricity to produce it
5.
by asdfadsfgfdda 2y ago
The engine load is probably a steady, consistent magnitude. While a landing load is rapid and variable. Also, you need to design legs for wind loading after landing, which can be high if you want to launch often.
6.
by asdfadsfgfdda 2y ago
or its shiny because vacuum hardware is routinely electropolished?
7.
by asdfadsfgfdda 3y ago
I think the original plan was to convert the heat back into electricity with a turbine. So the higher temperature of sand would greatly improve thermodynamic efficiency.
8.
by asdfadsfgfdda 3y ago
Yes a storm could damage the coal plant with some small probability. But now you have replaced the coal plant with batteries + solar. Solar will be disabled by every large storm due to cloud cover. The grid will certainly be less reliable.
9.
by asdfadsfgfdda 3y ago
Pilots still fight turbulence today, usually by changing altitude. If this system allows the plane to stay at optimal (but turbulent) altitude, it could save fuel.
10.
by asdfadsfgfdda 3y ago
Stainless steel has its own safety issues (hexavalent chromium exposure from welding or grinding)
11.
by asdfadsfgfdda 4y ago
Private car insurance companies are pretty sophisticated, so they certainly know if a certain vehicle is causing higher claims and will price accordingly. But, IMHO, the legal minimum liability insurance policy is way too low. A serious car
12.
by asdfadsfgfdda 4y ago
It's not just a passive payload, these targets have radio transmitters. So the task is probably easier.
13.
by asdfadsfgfdda 4y ago
Quad-engine jets are automatically ETOPS-180 https://www.boeing.com/commercial/aeromagazine/articles/qtr_...
14.
by asdfadsfgfdda 4y ago
In theory, a faster airplane is more productive (fly passengers farther in the same amount of time). So crew and capex costs are lower per mile. Maybe a crew can fly New York-London and then fly back, vs a subsonic airliner with a crew that
15.
by asdfadsfgfdda 4y ago
There are many in CA that are ridiculous. Most are not related to safety, but likely due to lobbying from some industry. Fire sprinklers are required in single family homes. The very small incremental safety benefit is far outweighed by the
16.
by asdfadsfgfdda 4y ago
>The mobile microreactor would be coupled with a power conversion system that generates approximately 1 to 5 MWe using an open Brayton gas cycle https://www.cto.mil/wp-content/uploads/2022/05/Final-EIS
17.
by asdfadsfgfdda 4y ago
These are gas-cooled reactors, and much lower power output. Existing designs for Navy reactors are all pressurized water reactors that produce hundreds of MW. There's also a challenge in waste heat. Ships have basically unlimited seawa
18.
by asdfadsfgfdda 5y ago
Most fuel for aviation is jet fuel, and there already is a "drop in" approved biofuel available: https://www.faa.gov/about/office_org/headquarters_offices/an...
19.
by asdfadsfgfdda 5y ago
The real answer is: look at their workforce. Their workforce has all the power in negotiating. https://philip.greenspun.com/flying/unions-and-airlines
20.
by asdfadsfgfdda 5y ago
Depends on the customer. An occasional (1/year) flyer? Probably not. A frequent flyer? Yes, by direct observation and indirect anecdotes. There are also very sophisticated customers, like large businesses. They definitely look at cance
21.
by asdfadsfgfdda 5y ago
It's a glider, but a glider capable of mach 3 flight. So, approach speeds will be much faster than a typical glider. Probably higher speed than an airliner. That would be dangerous to land off field. Also, it could mean the vehicle is
22.
by asdfadsfgfdda 5y ago
The linde cycle is not used industrially, they are using a reverse brayton cycle. This cycle use air as the refrigerant, and is probably the most widely distributed industrial cycle in the world (because liquified gases do not transport eas
23.
by asdfadsfgfdda 5y ago
They likely use air as the refrigerant, like most air liquefaction plants.
24.
by asdfadsfgfdda 6y ago
I doubt $.50 is the true cost, there's a program to donate millions of tablets to developing countries: https://mectizan.org/partners/glaxosmithkline/
25.
by asdfadsfgfdda 6y ago
>If people do not truly know how protective a vaccine is, there is the potential for harm because they may assume that they are fully protected when they are not, and accordingly, alter their behavior to take unnecessary risks. Amazing,
26.
by asdfadsfgfdda 6y ago
They do publish evidence. Seems to increase the "closure" rate by 5-10%. It's not perfect data, because they are only flying during the day, so crime committed at night may just be harder to solve. https://www.balt
27.
by asdfadsfgfdda 6y ago
Why not support lowering crime rates even more? Comparing the crime rates in Baltimore to other western countries, there's still plenty of room for improvement.
28.
by asdfadsfgfdda 6y ago
Or just track the orbits, these are all published by NOARD. Most satellites do not change orbits often. Even easier, Capella-1 is in a sun synchronous orbit, so it will always pass overhead at the same local time, at noon or midnight. http
29.
by asdfadsfgfdda 6y ago
1. facilitating "illegal" activities (ransomware, dodging capital controls and taxes, drugs, etc), similar to cash 2. speculation: "Someone speculating on Bitcoin over a week cares little about its fundamental value: even if
30.
by asdfadsfgfdda 6y ago
Another possibility is these billionaires were scammed. It can't be too difficult to forge a label and place it on a flu vaccine vial.

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