AmpBenzScientist @AmpBenzScientist@qoto.org

@natharari I watched most of it but it was rather biased. There were a few fair points made. It still didn't cover what I saw in the burn of the raptors. There was a video a while back of a Sukoi fighter in India with compressor failure. I saw a pattern similar to compressor failure in the irregular burn patterns of the raptors on liftoff.

At the time I thought it was just an oddity of the fuel used as it lifted off and the burn was rather clean compared to other lift offs I've watched. It stabilized the angle and continued upward. The tumble was the last part I watched. It was rather impressive.

What was implied about the engine failures and the frozen valve seems to be true. What I saw seems to indicate a problem right at lift off. One of the Raptors seemed to be having an air or fuel issue which would explain the irregular burn patterns that I saw. Unfortunately I did not see that video in their critique.

SpaceX needs new talent and that's no secret. At least it wasn't manned. I remember when NASA had the reputation of "Need Another Seven Astronauts". Yes the launch pad failed and I watched the same chunk of concrete fly into the ocean three times. It's odd how quickly people criticize new technology leading to new problems. Yes SpaceX had several failures and it appears that the design criteria for the main module was to be as phallic shaped as possible.

Honestly that module looked like a penis. I wonder if the rockets performance would be improved by adding vascular lines going to the rockets. Perhaps that will be the next design. Honestly they need to stay grounded until they can get those Raptors more reliable and maybe not launch right next to protected wetlands with a very faulty launch site.

@lore Or if it's Kraftwerk, keep the star of the show from getting rid of them.

@thor I suppose revealing my genitals in response to the government's request would result in a fine for not having a permit. They probably want to see helikopter to be sure it is real too. Bureaucracy can be so obtuse at times.

@WilliamRamsey The fan mount plate could be extended enough to where two rubber straps form high areas and a U shape in the metal allows an external rubber strap to clamp it securely in place. Another external rubber strap could be used to keep it air tight.

The two internal rubber straps would be before and after the U in the metal so the external rubber strap can go into the U section. The internal rubber straps raise the filter medium so the external rubber strap can pull a better seal without putting excessive stress on the medium. It's also going to be reusable when fitting another bag. A similar approach is used to form water-resistant seals in electronics.

I would also recommend an internal wireframe to support the bag so it performs better in either push or pull configuration. The fan shroud could also use rubber straps to allow for a quick change bag system. A plug and play style that integrates the support wireframe with the metal connector that mates to the fan shroud. A swap would just need a trash bag to go over the bag frame, kill the fans, remove the strap, pull it into the trash bag, push the new filter on, reattach bans and turn on the fans.

The metal frame can be taken outside, removed from the old filter medium, thoroughly cleaned, dried and new filter fitted. It's like a K&N air filter but without the long cleaning and oiling procedure or having to replace or clean your MAF sensor.

I saw your cylindrical filter post. I believe that a conical filter would provide better results. To put it in perspective, it would resemble your bag filter where more uniform negative or positive pressures are allowed. The majority of the air will come from the rear and middle sections with higher pressures allowing the area closer to the front to pass air.

Yes, it's interesting but I don't know if those are made for anything but vehicles. It seems obvious that a large cylinder would restrict airflow more due to higher internal volume and uniform shape despite internal pressure differences. Conical filters make more horsepower and tomatoes if you catch my drift. It just seems like lazy engineering. The only cylindrical filter used in motorized equipment I know of is on the Caterpillars used in quarries. The reason why is because they need to breathe even after the more favored sections are partially clogged. Those are also very large filters that need to be replaced in 200hr of operation or more in dusty environments.

@WilliamRamsey I love the design. The fan size seems to favor flow volume over flow pressure. Given that the intake seems to be more omnidirectional than the existing air, I would suspect that it could be a higher performer if the filtration medium is being pulled through. A smaller fan size could make the velocity sufficient to push air.

I base this off the server fans that take low pressure air and push it out at velocities high enough to make white noise painful.

The bag would perform well enough in either configuration. If it were mounted in a rack server I would recommend the pull configuration with ducting in a 2U size so it can pull enough cool air using the negative pressure from the rest of the server in addition to the fans.

This configuration would help keep the dusty bag from being inside the server when it needs to be changed. The 2U Duct could be pulled, changed and reinstalled quickly.

It's just a thought about how it could be made to perform a little better. Those fans don't seem to mind pulling through light filters on PCs. The bag seems to be a good match for the flow pattern with the lesser pull from the top and higher pull from the center. The bag provides a reservoir of sorts so the pulling pressure doesn't need to be higher. In a push configuration the fans get dusty and the resistance of the filter medium could cause more problems due to turbulent air and a slight bit of compression of the air.

I would suspect that the flow would not be affected much with this design. Your design is rather elegant and deceptively simple. Very good work.

@natharari Wasn't Boeing the established contractor that failed to make it close to SpaceX? It was still impressive to watch. Take a look at the burn of the boosters, there might be something interesting that I haven't seen anyone talk about.

@skyblond That's about standard for a gaming laptop even in the US. I really wish they would use filters and stronger fans.
(Don't fail me HSK based education.)

那问题是通常。应用艺术是优先。

Aesthetics are still present.

@sergeant Well the Chevron implies a rank of private so it does explain the broken rifle and being frisked by a kid. Seems like something that a Sgt would order them to do while their platoon watches.

@cyrilpedia Moderna had a contract with DARPA for rapid vaccine development. If I recall correctly, it essentially accepted the fact that the first soldiers exposed might not survive. It was allegedly for the second line of soldiers. A seemingly cold thought but very practical. It was for responses to new infectious diseases.
It seems to have worked somewhat but I don't think it was fully operational in time for COVID-19.

@thor Don't you know that the government cares enough to follow you home?

@lore Somehow keep the rest of the group sober enough to be productive?

@lupyuen VHDL is tried and true but there's a project that has my attention.

https://adept.eecs.berkeley.edu/projects/chisel3/

@lore Yeah I know the feeling. One area of research required at least a Threadripper with 128 threads and a lot of ram. It's a shame that the University wouldn't fucking cough up the funds. A lot of my research work was done on equipment that I had to buy with my own money. I pushed for open source projects and it was mostly ignored by the department. Someone in the department slipped me a name in Engineering and the last time I checked, they were discussing my old proposals because I impressed them.

I've worked on systems that I could not afford and I was only allowed to do so much because they knew I was a hacker and got past their systems before. I miss it sometimes and people were sad to see me leave. It was hard to feel the same way when it seemed like I was sabotaged and stabbed in the back numerous times. I still can't discuss some of the things I worked on.

@lore The Synth master I spoke to recommend an FPGA or custom hardware. They design custom hardware and that's all they will reveal.

The FPGA equivalent to your DSP is somewhere around 30-50 USD. That's a design rated for industrial and automotive use. It comes with built-in DSP functionally in addition to the FPGA functionality.

If the hardware is solid and capable, you might be able to sell a limited amount as a fully configurable synth. Crowdfunding could be an option to offer a wide range of functionality and capability.

@lore It's an advanced FPGA rated for industrial use. The price is for one unit from Mouser.