nBodyProblem

joined 2 years ago
[–] [email protected] 7 points 1 day ago (1 children)

To be fair, right around 50% of us are vehemently opposed to this sort of thing. Far from all America

[–] [email protected] 1 points 2 days ago

Agreed. A plane that can do 200ish knots for a few hours could hit a nice sweet spot for a lot of routes

[–] [email protected] 2 points 2 days ago* (last edited 2 days ago)

I can’t comment for their engineering team, but usually open props are more efficient because any reasonably sized duct constrains prop diameter. Increasing prop diameter is the best way to improve efficiency. Ducting a very large diameter prop comes with a large structural and weight penalty.

Generally speaking, the only time ducts buy their way on is when they are also needed for bystander protection.

[–] [email protected] 13 points 3 days ago* (last edited 3 days ago) (2 children)

It’s absolutely not impossible. Airplanes are more efficient than drones, and efficiency grows with scale. Drones fly. Of course an airplane can do the same.

The problem is one of speed and range. The best form of propulsion we have for electric airplanes is the propeller, which has a lower top speed potential than a turbofan. The energy density of batteries is also lower.

Realistically, an electric airplane will have reduced range and speed compared to a modern jet.

[–] [email protected] 4 points 3 days ago (3 children)

There are a lot of other factors. For example, electric motors with propellers are far more efficient than turbofans

A propeller driven airplane will also be substantially slower than a turbofan one, allowing for unswept wings and better aerodynamic efficiency

In reality, battery powered passenger planes aren’t impossible but they will definitely have a shorter range and slower speed. They are realistically only suited for regional routes.

[–] [email protected] 5 points 6 days ago (2 children)

Since when could you hold a musket on your belt?

They typically had barrels over three feet long, with a total weapon length over four feet.

[–] [email protected] 2 points 1 week ago* (last edited 1 week ago) (2 children)

Guns also are not manufactured clandestinely en masse, anywhere, because it takes a lot of precise industrial machining to do at scale. They are not like sex or weed that are impossible to ban, when you stop manufacturing them for nonsense reasons, they stop circulating and criminals stop being able to get their hands on them.

This is false. There are multiple Latin American countries where street gangs have been manufacturing reasonably sophisticated all-metal submachine guns at scale in clandestine factories for over a decade. Even prior to the 3d printing boom, open bolt submachine gun were fairly simple for an individual to manufacture with common hand tools, and quantities scale rapidly with improvised tooling and readily available machines like benchtop lathes.

With 3d printing, it has become even more accessible. Printers can be used to manufacture tooling in addition to parts, and the DEFcad community has been remarkably resourceful in developing new methods utilizing 3d printers. Everything from electrochemically etched, rifled, barrels to recoilless rifles with shaped charge warheads can be made at home if a person has no compunctions about breaking the law.

You can see the impact of 3d printing overseas, where there are a number of rebel groups using 3d printed firearms as their primary armament. Banning guns might reduce the quality of what is available, but it definitely won’t end production in a country full of gun enthusiasts with the interest and skills to make firearms.

I do not understand why Americans think they are such unfathomably unique snowflakes that none of the evidence or lessons learned from every other developed country could apply to them.

As I said, our gun culture ensures people continue to make firearms regardless of what the law says. We have countless machinists, gunsmiths, and hobbyists that would manufacture guns as a form of protest if they were banned. Furthermore, we already have more guns than people and the vast majority of them would remain in civilian hands if the government tried to seize them.

But most importantly, many Americans believe that the equalizing force of firearms—something that allows the citizenry to defend themselves against tyranny and for the weak/frail to defend themselves against the physically strong— is philosophically worth a small reduction in public safety.

[–] [email protected] -2 points 1 week ago

Never suggested they didn’t. I’m suggesting that the country would have been better off if they both had weapons and chose to resist.

We aren’t Germany. The founding fathers made sure we could arm ourselves. The choices we make are our own.

[–] [email protected] 8 points 1 week ago (18 children)

This is honestly, the dumbest, most American take in the world.

Hell yeah brother 🦅🦅🦅

It literally ignores the plainly obvious fact that not a single other developed country allows gun ownership, and yet, still have rights and democracy and freedom.

Many other developed countries allow gun ownership. Educate yourself, my man.

But more importantly, I literally do not care if they do or not. The point was never that democracy cannot exist without firearms, but rather that in the worst case scenario an armed citizenry can act as a force against tyranny. It’s a rare thing that it might be needed, and a last resort. No sane person wants a civil war

Guns did not get your rights

Except they literally did. How do you think the revolutionary war was won, softly spoken words?

they do not protect you from a government that has AI powered drones with anti tank mines on them. Hell a fucking APC with a sound cannon will make your AR look like a child's toy.

Guerrillas with small arms in developing countries have repelled the US military repeatedly over the past half century. More importantly, if you don’t think a combination of small arms and low cost homemade munitions are effective against a modern military you haven’t been paying attention to the war in Ukraine at all.

[–] [email protected] 1 points 1 week ago (1 children)

That’s a fair statement.

I don’t think we are there yet. It will be far better for our country if our problems can be solved by diplomatic and political means, and we are far from running out of levers to pull.

[–] [email protected] 4 points 1 week ago (1 children)

The founding fathers have written at length on their reasoning for including the right to bear arms in the constitution. It is very clear that they believed in the people’s ability to resist and overthrow the government if needed.

After all, this was a group who escaped the grip of the monarchy through force of arms. It’s odd to think that they didn’t see value in the ability of the people to do the same, especially when they repeatedly wrote about it in period.

However, all that being said, I agree with your sentiment that leftists should be arming themselves. Just because the 2nd amendment has almost completely lost it's original intent or meaning, doesn't mean we can't take advantage of the fact that it exists with tons of legal precedent to strap up in preparation for what might come next. Things are unlikely to get better from here, and if things get worse you will be glad you have a firearm for protection.

Also this here is kind of the point. The original intent is not important; many people believe in the modern era that an armed citizenry is important as a last ditch balancing force to government overreach. We are all better off if left leaning people arm themselves instead of using pro-gun arguments as some sort of self-righteous gotcha against the right.

[–] [email protected] 0 points 1 week ago* (last edited 1 week ago) (2 children)

I believe it’s fundamentally important that we keep that right to an equalizing force.

Acting like we are going to directly fight a tank with an AR-15 is either a straw man or just frankly ignorant. The US military has repeatedly been repelled by guerrilla forces with small arms, and if you have been paying any attention at all in Ukraine you will see what can be done with very little technology in terms of drones etc.

 
 
 
 
 
 
 
 

Car communities are always filled with people wanting to know what they need to do to get started with car activities like autocross, track days, or meets. To kick off useful/informative discussion over at /c/[email protected], I decided to write a series of “getting started” guides. I hope they might encourage some people to stop thinking about it, go out, and do fun stuff.

I feel like they might have some interest to the wider car community, so I’ll repost them here with some modifications to generalize anything that is 86/BRZ/FRS specific.

Autocross

What you need:

Autocross is often confused with track days, which is really far from the truth. Autocross is really no harder on a car than any number of normal on-street activities for a sports car. The runs are only ~40 seconds long with tons of cool down time between runs.

However, you do need a car in good working order that will pass tech. This means no bad wheel bearings, suspension that isn’t falling apart, and a properly secured battery. You are also responsible for ensuring you don’t have any major coolant or oil leaks. Nobody likes it when someone oils down the course and runs have to stop to do cleanup.

You also need a helmet if your region doesn’t have loaners. Most do, but it’s a good idea to ask if in doubt.

Nice to haves:

You probably want to bring a tire gauge for adjusting pressures.

Summer tires are good to have because all seasons are prone to chunking when driven hard. You don’t need to buy special autocross tires when just starting out, but if you are on all seasons keep an eye on the heat between runs and be carefully not to overdrive the car.

Bring lots of water, sunscreen, closed toe shoes, and maybe a wide brimmed hat. You will be out working at most events and will get a lot of sun.

A helmet sock is nice to have if you are using a loaner helmet.

Additional prep info:

I’d like to discuss the issue of classing. Basically, don’t mod your car to prep for autocross if you aren’t experienced at the sport. The things that knock you into a higher class can be unintuitive and if you don’t mod with a class in mind it will quickly become impossible to be competitive without huge money outlays.

For example, any aero mod in SCCA classing will knock you into either prepared or xtreme street at minimum. Prepared allows full on racing slicks and stripped out interiors; it is VERY expensive to compete in. Xtreme Street allows unlimited powertrain modifications; in many regions the winners have widebody cars with 3x the stock power levels and it takes a ton of prep to win in that arms race.

It’s usually best to just show up in a stock car for awhile and build for a specific class once you have experience.

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