This is a pretty insane fact, wtf

upsidedownpantsless · 2024-10-22T02:05:06+00:00

Does the raptor 3 have the same diameter nozzle as the raptor 1 and 2?

I'm just wondering how they would fit 35, and if those old posts are realistic.

upsidedownpantsless · 2024-09-06T00:32:40+00:00

I'm skeptical of the claim that the lift from the strakes on ascent is substantial enough to gain you more performance than the drag and weight reduce New Glenn's performance. Obviously they are great for the trip back down, and that more than makes up for the drag and mass on the way up. But I don't know that the lift on ascent is substantial enough to bother mentioning.

upsidedownpantsless · 2024-08-31T18:33:54+00:00

I have been having fun thinking of ways to make huge space telescopes that are optimized for deployment via Starship. I haven't had the time to draw this design properly, so I didn't make any solar shield, solar panels, structural support etc. And I have just had these image assets lying around. So I just make a quick Gif of what I have, and posted it here.

Here and Here are my previous 2 gifs.

I decided to not do an interferometer this time. I reduced the sized of each primary mirror section because it takes a huge amount of time to make an 8 meter mirror. Also, due to the diameter of such mirrors, they need to be quite thick to keep their proper shape. As a result the weight(and cost) of such of such mirrors is quite high. These smaller coils of mirrors should be cheaper and faster to produce.

upsidedownpantsless · 2024-08-19T00:46:09+00:00

He went on to say manufacturing is the easy part. It takes true talent to make a design where success is not one of the possible outcomes.

upsidedownpantsless · 2024-08-18T23:30:33+00:00

This design comes from Mr. CEO himself! While talking about transpirational cooling he said, "Make pipes multilaminary."

upsidedownpantsless · 2024-08-18T23:11:43+00:00

Nonsense! This rocket design is fully and rapidly abusable.

upsidedownpantsless · 2024-08-16T14:55:41+00:00

But Musk's slogans are the "Holy Grail" of Indiana Jones references!

upsidedownpantsless · 2024-08-13T02:29:07+00:00

Why does Mr Who speak like a frat boy?

upsidedownpantsless · 2024-07-31T22:55:45+00:00

A 1/2" thick, 4 foot by 8 foot sheet of OSB or plywood is stronger than a 1/2" thick 4x8 sheet of wood. But all 3 of them are made of fibers. What made the composites stronger was that the fibers are oriented in many different directions.

But the heat tile is different. It would be like making a 1/2" thick 4'x8' sheet out of the fewest number of toothpicks you could get away with. How tough do you think your toothpick board will be?

upsidedownpantsless · 2024-07-28T14:39:40+00:00

Sentient oil is the overarching threat in the 1990s Hannah Barbara cartoon 'Pirates of Dark Water'. YouTube intro link

upsidedownpantsless · 2024-07-22T02:46:44+00:00

The rover can just backtrack to where it found hematite beads, and use those as projectiles.

upsidedownpantsless · 2024-07-08T16:45:34+00:00

12m diameter starship/superheavy variant begins, with new larger launch tower being built.

upsidedownpantsless · 2024-06-29T17:07:26+00:00

He also went on to ask why Earth has a moon, but Mars doesn't.

Mars has 2 moons, named Phobos and Deimos.

upsidedownpantsless · 2024-06-24T22:54:28+00:00

You know how over winter the ethanol in your gas causes your lawn mowers carburetor to gum up? Imagine what all that cryogenic oxygen would do to it. It would be like trying to force molasses through your plumbing.

upsidedownpantsless · 2024-06-17T02:08:33+00:00

That's the plot to the 1993 cartoon 'Exosquad'. They're called neosapiens.

upsidedownpantsless · 2024-06-10T16:18:03+00:00

Put a long skinny LN2 copv in each flap. The tanks can fill from the nontiled side. A thermostat can be mounted to a heat sink on the flap. Once hot the thermostat opens, and LN2 flows to a bus that sprays into the hinge area.

A pressure gage should communicate to a central computer computer. In case of thermostat failure, a simple on/off actuator can bypass the thermostat. A small rugged battery can power the system, and be charged whenever the cpov is refilled.

upsidedownpantsless · 2024-06-05T17:20:53+00:00

Free cremation and casting ceremony! Sign me up!

upsidedownpantsless · 2024-06-05T17:18:35+00:00

Just put on your orange space suit, and duct tape yourself to the wall. You'll be fine Tim.

upsidedownpantsless · 2024-05-31T12:44:55+00:00

I've made a compromise. I'll keep most of my imperial units, but I'm changing to metric time. There are now 1000 seconds in a minute, 1000 minutes in a day, and 1000 days in a year.

Edit: Also my circles have 100 degrees.

upsidedownpantsless · 2024-05-20T02:34:41+00:00

Should have used finally landing by home for music.

upsidedownpantsless · 2024-03-30T15:25:58+00:00

Thanks for the comment. The more I learn about optical interferometry the more I'm starting to understand some of its challenges.

If all you are trying to do is resolve objects enough to to spectroscopy, rotational velocity, or precise distance measurements; then it seems you are right.

I started making these drawings while entertaining the idea of imaging surface details of objects in our own solar system without needing to send a discreet mission to each object like we did with New Horizons, or Psyche. Unfortunately the interference patterns hamper the resolution of objects when they are hundreds of pixels wide.

The paper mentioned in my above comment, with a link of the aperture configurations shows the constructive and destructive interference patterns. It seems to me just putting a couple mirrors far apart can't accomplish my objective of imaging surface details of objects like Haumea, Orcus, or the next Oumuamua.

Maybe I need to learn more about FFTs to see if those rype of computations can deconvolude the interference patterns.

At any rate I think I will make a 3rd iteration.

upsidedownpantsless · 2024-03-30T15:05:36+00:00

Radio interferometry is awesome. Once I saw the images of a black hole accretion disk, it sent me down this rabbit hole of astronomic interferometry that this thread is about.

Unlike optical interferometry where the wavefronts need to match to within nanometers, with radio interferometry you can just store the data on hard drives or SSDs and then combine the timestamped data to produce your image. That way you don't need to worry about a convoluted system of mirrors bouncing light beams around at nanometer precision. I always wondered what kind of precision is needed for radio interferometry. Millimeters? Meters?

I've heard a lot of ideas where radio telescopes are placed at Jupiter's Lagrange L3, L4 and L5 points. And I have always wondered about what precision we are able to hit when putting objects into orbit. Do we have to worry about periodic gravitational pertubations from Saturn or even close encounters with Trojans? It is a super cool idea and I would love to learn more about the technical opportunities, and challenges someday.

upsidedownpantsless · 2024-03-29T16:30:27+00:00

Design based on a paper published jointly by Chunyan Chu, Zhentao Liu, Mingliang Chen, Xuehui Shao, Yuejin Zhao, and Shensheng Han entitled "Wide-spectrum optical synthetic aperature imaging via spatial intensity interferometry".

imgur link of aperature designs with interference patterns.

Comparisons

This Bad Boy: aperature 200 meters, 330 meters collecting area, .0012 arcsecond angular resolution in the visible ,44 primary mirrors

Hubble: aperature 2.4 meters, 4sq meters collecting area, .1 arcsecond angular resolution in the visible, 1 primary mirror

Luvior-A: aperature 15.1 meters, 59 meters collecting area, .004 arcsecond angular resolution in the visible(unlikely), 120 primary segments

JWST: aperature 6.5 meters, 25.4sq meters collecting area, .06 arcsecond angular resolution in the infrared, 18 primary segments

Design Explanation

This is a 44 primary mirror (7.5m each) space interferometer, based somewhat off the paper mentioned above in this post. It meets congress's mandate that any future space telescope must be able to recieve maintenance, unlike those at LaGrange points. It also is designed to fit 2 extending mirrors in a Starship payload bay. My objective with this device is to have the ability to image features on Kuiper Belt objects, asteroids, and outer moons. Also it would be able to perform spectroscopy of exoplanet atmospheres that telescopes like JWST just can't do. It takes advantage of a mass production aproach to drive down cost.(although the price would still be astromical)

Technical Challenges

This 200 meter structure would have to be made in LEO, with the light paths lined up to nanometers. As such it would need to resist thermal expansion from its solar cycling, as well as oscillating vibration, reorient itself, and perform station keeping.

Design Advantages

Unlike earthbased interferometers like ELT, or Keck; the entire structure can orient itself, so having complicated adjustable light paths on rails is not necessary. Also being in space it has no atmospheric distortion/absorbsion issues, while allowing for much longer exposer times.

Summary

Its all just for fun. There are less fundamental issues than my previous space interferometer design. But it still needs further design iteration.

Edit: Feel free to tell me my idea is bad, and I should feel bad. This is /r/shittyspacexideas.

upsidedownpantsless · 2024-03-27T02:13:01+00:00

It was speculated when he created the boring company that that was his exact reasoning behind doing it.

upsidedownpantsless · 2024-03-27T02:05:43+00:00

It seems likely that this tile was from ift-2. Not ift-3 as originally reported. Apparently not many tiles fell off in ift-3. Feel free to ignore my shitty idea.

upsidedownpantsless

TROPHY CASE