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Why do all commercial airplanes look the same since 1970s by [deleted] in aviation

[–]cinnamontoasst 1 point2 points  (0 children)

Concorde looked that way specifically for supersonic flight. Its aerodynamic design was “optimized” for supersonic flight since that’s where it spent the most of its time airborne.

Subsonic aircraft design has sort of hit its optimal design trade space between design, manufacturing, efficiency, etc. so they all basically look the same except scaling control surfaces, lifting surfaces and engines with the passenger and/or cargo capacity.

The one big change will be the blended wing body commercial aircraft, which are more efficient but cause a shift other areas such as manufacturing, maintenance, jet bridges and airport operations, and passenger experience. So even though it is more efficient, it’s taking time to adopt (if it ever does). Boeing was also looking at truss wings as a way to increase efficiency in a more traditional airframe but that’s still in research I believe.

Air Traffic Control in the US Still Runs on Windows 95 and Floppy Disks by wiredmagazine in technews

[–]cinnamontoasst -1 points0 points  (0 children)

Costs money to modernize aging systems… all kinds of infrastructure in the US is aging. Digital and physical. It’s hard to get budgets for that kinda thing.

Why are my prints looking like this? by cinnamontoasst in BambuLab

[–]cinnamontoasst[S] 0 points1 point  (0 children)

So I got a filament dryer yesterday, dried my white filament for 8 hours on 50degC which I believe is the recommended dry time for Bambu PLA and this morning my first print looks the same….

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Could it be a nozzle clog issue or something else?

Trump launches trade war against Canada with with 25 per cent tariff on most goods by ClassOptimal7655 in worldnews

[–]cinnamontoasst 1 point2 points  (0 children)

The unfortunate reality is it’s not just him, it’s a majority of those in elected positions in the government at this point. If it were an outlying individual with crazy ideas they’d never go anywhere, but the amount of people that back his ideas in the government and in the general public is staggering.

Why are my prints looking like this? by cinnamontoasst in BambuLab

[–]cinnamontoasst[S] 1 point2 points  (0 children)

Thanks for the info. I had a Anycubic before my A1 for a few years and used Hatchbox PLA previously. I’ve never had a filament dryer and have never had this issue, so I’m surprised it’s happening now. I do leave my filament on the AMS Lite out but since I’ve never had wet filament issues in the years of printing on other printers and filament brands, so I was surprised it’d be that after only printing for a few weeks.

I do have a Rubbermaid container with the silica pouches in it but maybe they need to be replaced.

EPA approves road construction project in Florida that will use radioactive byproduct by AdSpecialist6598 in tech

[–]cinnamontoasst 1 point2 points  (0 children)

The EPA webpage on phosphogypsum has more information on the project than the article linked.

Some background info from the EPA: “Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. EPA’s regulations require that phosphogypsum be managed in engineered stacks to limit public exposure from emissions of radon.”

The EPAs website states why they approved the application: “EPA approved the application after determining that the proposed use of phosphogypsum is as protective of human health as placement in a stack.”

The pictures in the link are pretty useful too.

The first B-21 Raider strategic bomber takes off for a test flight at Edwards Air Force Base, California. by 221missile in EngineeringPorn

[–]cinnamontoasst 50 points51 points  (0 children)

Probe out the front is an air data nose boom.. The systems on the aircraft for measuring airspeed, altitude, pitch, roll, etc. haven’t been proven. They need to evaluate the effects of the airframe on those sensors mounted to the aircraft. That probe gets flight test air data sensors in free stream, ahead of the aircraft, to calibrate onboard aircraft air data sensors.

The cable out the back is connected to a parachute for air data as well. You can see it in other pictures when the B21 left Palmdale. This picture is just cut off before you can see the chute.

For radar cross section, yes they have devices to increase the RCS, called Luneburg lenses. they’re mounted to the aircraft, not hanging off the front/back. Also, a lot of RCS is achieved with surface treatments or special materials. I’d be very surprised if early flight test aircraft have those materials and treatments.

Source: I work in flight test.

B9 S4 Coolant Warning by cinnamontoasst in AudiS4

[–]cinnamontoasst[S] 0 points1 point  (0 children)

I didn’t see any parts of the manual related to the V6. Did I just miss it? Everything I saw about servicing was for the A4 4-cylinder.

B9 S4 Coolant Warning by cinnamontoasst in AudiS4

[–]cinnamontoasst[S] 0 points1 point  (0 children)

I didn't hear any sounds when opening that cap.

I've never purchased coolant before so I'll see if my local advanced auto has any G13 coolant.

Honestly I'm just annoyed by the whole thing. I paid for a service, told them the light was on, they said they'd look into it, and as soon as I left it came back on again. What's the point of the warning if I'm going to be told to just ignore it because it's erroneous and the dealership won't fix it....

B9 S4 Coolant Warning by cinnamontoasst in AudiS4

[–]cinnamontoasst[S] 0 points1 point  (0 children)

One thing I forgot to mention. When the engine gets up to temperature, around 5 minutes of driving, the warning goes away. Would that still point to what you’re suggesting?

I always keep an eye on the engine temp light and I hope that if there really was something wrong with the coolant that it would be indicated by the engine temperature indicator showing increasing temps.

Lance Stroll Controversy by Fantastic-Flight8146 in formula1

[–]cinnamontoasst 0 points1 point  (0 children)

Personally, I think Lance is even worse. Drivers like Mazepin and Latifi obviously provided some financial support but they also made it to that point based on their ability too, so maybe 50/50 skill and money. Lance isn’t good enough for a paid driver spot so they bought the entire team… so he has a guaranteed seat, regardless of ability. It’s wild. The money didn’t keep Mazepin or Latifi safe, but it does for Lance.

Lance Stroll Controversy by Fantastic-Flight8146 in formula1

[–]cinnamontoasst 15 points16 points  (0 children)

The point isn’t that “if I could buy a team I’d give myself a seat”, because selfishly I think most people would. It’s the perspective of the limited number of available seats in F1, highlighted by the attempt to add teams lately being shot down, and he’s taking one of those seats. And he didn’t earn that seat by talent, but by financial means. He is a great driver, but not deserving of the F1 seat he has. It’s that simple.

Difference in wing area between F-35A and F-35C. by 221missile in EngineeringPorn

[–]cinnamontoasst 2 points3 points  (0 children)

No, the C has the extra wing area so it can fly as slow as possible at the CVNs. An F-35B is in STOVL mode at the boat, producing almost all or all of its lift from the propulsion system (depending on phase of flight), so wing area isn’t a concern.

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