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FlyMoreRockets

1,361 karma · joined August 10, 2018

Broad interests. Micro launch systems for space access. Sustainability. Retrotech. Efficient Design.
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FlyMoreRockets··on How to Make an Aluminum Air Battery
"They have one of the highest energy densities of all batteries...an electric vehicle with aluminium batteries has the potential for up to eight times the range of a lithium-ion battery with a significantly lower total weight." - https://en.wikipedia.org/wiki/Aluminium–air_battery
FlyMoreRockets··on New Glenn’s Progress Towards Maiden Flight
Considering how US space program funding is subject to the whims of presidential administrations and congressional funding, New Origin may actually come out on top of this comparison.
FlyMoreRockets··on A battery invented 120 years before its time
It's not just farmers and miners, but the extensive support system that grows up around these activities. People living in mining and farming towns have to regularly drive longer distances than battery technology will support.

For example, I am taking classes 5 days a week, but live 100 miles away in a farming community. Due to the nature of the course work, a significant portion is hands-on and cannot be done online. The campus has no charging stations and only relatively recently have electric cars had sufficient range.

FlyMoreRockets··on US Covid-19 Cases Caused by Variants
See also:

Map: Track the spread of the Covid-19 variants across the United States https://www.nbcnews.com/health/health-news/map-track-spread-...

About Variants of the Virus that Causes COVID-19 https://www.cdc.gov/coronavirus/2019-ncov/transmission/varia...

Variants of SARS-CoV-2 https://en.wikipedia.org/wiki/Variants_of_SARS-CoV-2

FlyMoreRockets··on Building an E-Ink Laptop
Good point, thanks. The OLPC once was heavily documented, perhaps the relevant portions still exist somewhere.
FlyMoreRockets··on How a shadow army of ghost kitchens took over America’s restaurants
During an enlistment in the US Navy I had the opportunity to visit many exotic (to me) foriegn ports. My goal was to explore authentic local food and culture, but inevitably, the buzz when I got back to the ship was the location of the nearest McDonald's. Some peple just crave consistiency and a "taste of home". Each to their own. If I've spent months to get half way around the planet, I sure as hell want to revel in the experience!
FlyMoreRockets··on Building an E-Ink Laptop
I loved my OLPC, especially the sunlight readable, low power display!

Could it easily be grafted onto something like a RasPi, maybe with a mechanical keyboard and trackpad and lots of Li cells?

FlyMoreRockets··on Building an E-Ink Laptop
The PixelQi display spun from the OLPC project was really good and clearly affordable, considering the original target market. Granted, E-ink is superior in many aspects, but I'd settle for a sunlight readable, low power monochrome LCD display. As an added benefit it updates much faster than E-ink.
FlyMoreRockets··on Turning an old Amazon Kindle into a eInk development platform
Glad to hear RLCD is finding a niche between e-ink and other displays, thanks for the recommendation.
FlyMoreRockets··on The Simtel.net MS-DOS Collection
Just reading the listing is useful though.
FlyMoreRockets··on Tabletop Audio – Ambiences and Music for Tabletop Role Playing Games
Coding from horseback sounds like an interesting experience.

You may also appreciate this:

http://www.imissmybar.com/

FlyMoreRockets··on The Simtel.net MS-DOS Collection
First I've heard of the ExoDos collection, thanks for bringing this to my attention.
FlyMoreRockets··on Turning an old Amazon Kindle into a eInk development platform
Good point, it has many of the same advantages: low power, sunlight readability. Why isn't it used more often? The OLPC had a dual LCD/LED display (PixelQi) and it worked very well.
FlyMoreRockets··on A Turbine Powered Fire Truck? Seattle FD's Turbo Chief
GM also fielded a number of turbine powered heavy vehicles from the 50's through the 60's.

https://www.curbsideclassic.com/bus-stop-classic/bus-stop-cl...

FlyMoreRockets··on How to unlock the infrared camera hidden inside the Pixel 4
Thanks for this. Infrared imaging is a major selling point and I now am higly likely to get a Pixel 4.

Note: this is not thermal imaging.

From the video information:

Camera apps to try:

Open Camera: https://play.google.com/store/apps/de...

Some people are reporting better luck with HedgeCam 2: https://play.google.com/store/apps/de...

Tap the button that is normally for switching between front and back camera. Keep tapping until you get to the IR.

FlyMoreRockets··on A Turbine Powered Fire Truck? Seattle FD's Turbo Chief
From the article comments: "...San Francisco had a 900 series convertible engine that had a jet turbine as well..."

Ah, here it is: https://www.sae.org/publications/technical-papers/content/65...

FlyMoreRockets··on Indian space startup fires world’s first fully 3D printed rocket engine
Kudos for the progress Agnikul Cosmos has made and I wish them great success.

Prior art:

https://www.relativityspace.com

https://3dprint.com/111799/nasa-3d-printed-rocket-engine/

https://www.technologyreview.com/2019/06/19/134877/rocket-la...

https://hackaday.com/2020/12/08/sla-3d-printed-vortex-cooled...

https://www.youtube.com/results?search_query=3d+printed+rock...

https://3dprint.com/278184/startup-accelerator-ursa-major-is...

FlyMoreRockets··on Turning an old Amazon Kindle into a eInk development platform
Valid question. eInk is draws much lower power than competitors and excels for sunlight readable displays. It also has superior contrast, improving readability.
FlyMoreRockets··on Ligeti Stratos – First Open Source Microlight Aircraft (2013)
No, different plane.

“During a short test flight of the new highly modified production version"

FlyMoreRockets··on Ligeti Stratos – First Open Source Microlight Aircraft (2013)
Note: the prototype is open sourced, not the production plane.

From the linked article: "This [crashed] aircraft was intended to be the production version of the "Stratos" aircraft. The prototype version had successfully flown some 340 hours. The production model incorporated significant changes made by the designer/pilot."

FlyMoreRockets··on How to Use Web Browser as Text Editor
TLDR: enter the following into the address bar -

data:text/html,<html contenteditable>.

Control-S to save. Copy-Paste saves formatting. You can even paste images into the page.

FlyMoreRockets··on Ask HN: What is the oldest image online in which the link is not broken?
Hello fellow old farts. I rememer browsing on Mosaic, Cello, Slipknot, Netscape, Arachne, Phoenix/Firefox. There were doubtless others I've forgotten.

Anybody remember the various 3D browsers that would visualize site relationships? Apple's Hotsauce was the first one I remember, though it was more of a text based meta browser. Then there were a few graphical windowing attmepts.

The first images I remember seeing on the internet were the Clementine lunar photos, slowly rendered line by line:

https://en.wikipedia.org/wiki/Clementine_(spacecraft)

FlyMoreRockets··on Ask HN: What is the oldest image online in which the link is not broken?
https://missaonmaria.com

Specificially, note the Netscape Now! image: https://missaonmaria.com/img/netscape.gif

Interestinly enough, the Internet Archive has no record of the site.

FlyMoreRockets··on FM Reception with the GNU Radio Companion
You might want to add a tuning coil to that list.

https://en.wikipedia.org/wiki/Foxhole_radio#Designs_and_oper...

FlyMoreRockets··on r/WallStreetBets vs. Gamestop For Renewable Energy
You might consider changing the title to "WallStreetBets Against Coal Powerplants".
FlyMoreRockets··on Open Source Mission Control Software from NASA
I'm mostly a rocket guy. The control interface was sourced to a third party group with experience doing this sort of work. Since it's specific to this particular application, it's proprietary.
FlyMoreRockets··on Open Source Mission Control Software from NASA
Just minutes ago, I got out of a design meeting for rocket engine test mission control software. Shame our deadline is too tight to actually use the NASA package. Hopefully next time.
FlyMoreRockets··on Visual Tcl
Not sure why you are being downvoted, you aren't wrong.

How does it compare to Python?

FlyMoreRockets··on East Coast Internet Outage
Occam's razor: when presented with competing hypotheses about the same prediction, one should select the solution with the fewest assumptions.

https://en.wikipedia.org/wiki/Occam%27s_razor

Why is it that conspiracy theories seem to always require a more complex answer than the truth?

FlyMoreRockets··on What Makes a Good Antenna?
Pretty good practical guide, light on formulae, heavy on application.
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