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More of an environmental Skyhawk, actually

That was a great watch - it’s cool to find out the history.

I must say, society is much better off without widespread use of TEL, but as someone who used to do racecar things, TEL works like magic. A little goes a LONG way, and Midgely did legitimately stumble upon something with very high effect for the concentration (they also touch on ethanol in the video which has the drawback of needing a lot).

I’m not opposed to using it in a small scale racing context (like definitely not NASCAR) because it’s so fucking useful and the quantity is unlikely to cause harm. Unfortunately so much bad has been done with it at this point, I don’t think that’s a very popular opinion.

Whatever your views on it, it’s the only thing that can make gasoline legitimately 120+ octane, and that has huge implications for some types of racing.

It’s approved as of last fall, but the FAA spent well over a decade stonewalling it with unnecessary bureaucracy.

Now we’re left with the chicken-and-egg problem of the market, where nobody will offer unleaded because it’s more expensive, but it’s expensive because it’s not widely used. The feds should subsidize it down to $4/gal for 5 years to get it off the ground.

Yes, some light planes have fuel economy similar to efficient cars (which is very impressive considering how fast they are relative to cars). If you consider the advantages of direct, straight line routing, it’s not hard for planes to do better on fuel economy.

We’re not talking about jets here, though some of those do very well in mpg on a per passenger basis.

I gave up kids to have flying!

Worth noting that the amount of aviation fuel burned annually should make it a negligible contributer to environmental lead contamination compared to widespread automotive use (although I’m sure it contributes on airport grounds).

Edit: All the pilots I know want to use unleaded, and it was recently approved after being stuck in a bureaucratic nightmare process, but market forces may make it hard to adopt.

It was caught in FAA-Bureauctatic hell for 15+ years and just approved last year. It will be still be slow to become available and adopt for reasons that are complicated, but amount to bureaucracy, economics, and an insane degree of risk aversion. The vast majority of pilots want unleaded and it’s also much better for the engines.

Have you seen the unbelievably entitled, self-centered assholes who play music on trails because they’re too cool for headphones and fuck what anyone else wants?

We’re very quickly moving to a place where the QUANTITY of people is so high, the QUALITY of their lifestyles have to be sacrificed to cut down on human impact. The impoverished/developing world has very low impact, at huge cost to their quality of life. Who wants to volunteer to live like sub-saharan Africans, or Indians in abject poverty to cut down on human impact? I’m certain they don’t want that life.

I’m calling this eco-austerity. Instead of publicizing overpopulation and promoting low birth rates, we’re expected to belt tighten and give up on quality of life. It’s bullshit. We should have <1B people living like kings, not 10B people living like peasants.

This is exactly the point I’ve been making to them. I think it’s a bunch of people who have never lived outside of a major city, or grew up in new-construction actual suburban hell like Phoenix, DFW, Vegas, most of FL etc. Try old Midwest small city suburbs by comparison. Maybe parts of the northeast.

They probably couldn’t afford a car after used car prices spiked sometime between 2000-2010, and never experienced the freedom and autonomy. They can’t imagine not being into a downtown club scene - it hasn’t dawned on them that they will probably grow up and hate living in a congested apartment world and might want to stretch out in a bigger house in a quiet neighborhood. It’s never occurred to them that not everyone works from home and their spouse may need to take a job 20 miles in the opposite direction.

Do you sell your house because your job changed? Get divorced because your partner’s job changed? You can’t have ALL of the employment in easy reach by public transit from your home. This ideal-city with perfect transit and no commute is a handwave. UNLESS you live in a sufficiently small town that has everything but hasn’t blown up yet - and those aren’t dense enough for transit, and require personal vehicles.

Public transit is also more inconvenient than convenient even if you give it a maximum advantage in density and stipulate that the trains will run 24/7 and frequently (NYC).

It’s just inexperience with life or being an urban loving weirdo who can’t imagine that other perspectives exist. I want to spend all of my free time in places you couldn’t service with transit. They can’t even imagine it.

This is a flashforge creator pro 2 (in original comment). I’m not sure how to characterize the distortion, but the standard leveling routine puts the extruder in 3 locations near the screw adjustment. After adjusting spacing with a sheet of paper (included, calibrated thickness), it puts the extruder down on the center. The center is always higher than the 3 calibration points, often significantly.

I have both problems in different locations in the same test print first layer (see the second photo I posted).

What I’m concluding is that when the calibration locations (front center, left/right rear) are level at the ideal height, the center of the build plate is too high. This is either due to convexity of the build plate OR droop of the extruder due to very slight bending of the beam it travels on. I don’t know how to fix either of these problems.

Result of lowering the bed - perfectly deposited at the middle, underextruded at the edges

This is my attempt at calibrating the first layer. I don’t know if there’s some other process I should be using (while I’m fairly technical, I’m new to 3D printing)

In the case that is an uneven bed, where the middle is slightly high/convex, how do people fix that? I’ve calibrated it twice, but I think it’s still too close in the middle while the standard calibration locations (front center, back left, back right) are perfect

I think this could be the case but I just calibrated it twice and it still does it.

In the case that is an uneven bed, where the middle is slightly high/convex, how do people fix that?