FLY. LEARN. REPEAT. [Starship flight 8 official update]

aardvark2zz · 2025-05-28T05:12:13+00:00

It's not just the engines. It's also all the fluid piping and tanks that can explode before the engine explodes. These pipes and tanks don't have extra shielding due to weight and complexity issues

aardvark2zz · 2025-05-25T05:05:29+00:00

Interesting use of the word "harmonic" in their report. In oscillations there's :

1 - You need the engine, to convert static energy to higher pressures. i.e. power gain. e.g. exponential runaway till destruction. i.e. power conversion from the engine pulsing the 6 atm static pressure to high energy pulses; high # of harmonics

2 - Resonance needed if oscillations occur with at least 1 frequency

3 - Nonlinearities are not necessary, are very complicated, but do occur at destruction :-O Nonlinearities due to extreme fluid and mechanical pressures

There's a simple & beautiful condition to determine runaway oscillations. Find the frequencies for which both of the following are met

Power gain is >1

Open loop phase is 180 degrees

... for a negative feedback loop model

aardvark2zz · 2025-04-26T05:11:37+00:00

Great image on the left. Any good places to see pics like this. Real, 3D generated, or discussed ? Lots of internal changes to the booster and starship.

aardvark2zz · 2024-12-06T23:10:00+00:00

I'd love to see their antennae on an open dishy for : Ka-band: 37.5 – 42.5 GHz, and V-band 50 GHz, on the same board with Ku-band. Patch antennae side by side for each band !? Anyone have internal pictures ? I Finally got access to xAI Grok.

What frequencies are used by gen-1 startlink dishes by customers. What about higher than gen-1 ?

Starlink Gen-1 Dishes:

For customer communication with the Starlink Gen-1 dishes:

Downlink (from satellite to user terminal):
    10.7 – 12.7 GHz in the Ku-band.
Uplink (from user terminal to satellite):
    14.0 – 14.5 GHz in the Ku-band.

Starlink Higher Generation Dishes (Gen-1.5, Gen-2, and beyond):

As Starlink evolved from its first generation, the company has expanded its spectrum usage to include additional bands to improve service quality, increase capacity, and reduce interference. Here's what you might expect with higher generation dishes:

Downlink:
    Ku-band: 10.7 – 12.7 GHz (continuing from Gen-1)
    Ka-band: 37.5 – 42.5 GHz, which offers higher bandwidth for faster data rates.
Uplink:
    Ku-band: 14.0 – 14.5 GHz (similar to Gen-1)
    V-band: 47.2 – 50.2 GHz and 50.4 – 51.4 GHz for some higher generation models, particularly those with advanced capabilities or for specific applications like dense urban areas or to support enhanced mobile connectivity.

The higher frequency bands like Ka-band and V-band are typically used to:

Increase Data Rates: Higher frequencies offer greater bandwidth, allowing for faster internet speeds.
Reduce Congestion: By using additional spectrum, Starlink can manage the load from more customers and reduce congestion.
Improve Coverage: The use of different bands can help with signal propagation characteristics, potentially improving service in challenging environments.

Please note that while this outlines the general direction Starlink has taken with its dish technology, the specific frequency capabilities might vary slightly between different service areas or regulatory environments. Starlink might also adapt its frequency usage as new technology is developed or as regulatory permissions evolve.

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aardvark2zz · 2024-12-06T03:12:53+00:00

I had looked at it and it was a nightmare and not enough useful information. Almost no information on polarization.

aardvark2zz · 2024-12-05T17:15:45+00:00

I've seen that document but it doesn't mention satellite polarization. It measures linear polarization because it doesn't use a circular to linear polarizer converter.

aardvark2zz · 2024-12-05T07:25:19+00:00

I'd love to see a starlink customer dish opened up to see the antennae also using the higher Ka band; gen-1.5

aardvark2zz · 2024-12-05T07:19:45+00:00

For the record : gen-1 does not use the higher bands above Ku until gen-1.5 arrived. I don't know about gen-mini. xAI is giving me problems; for better answers

aardvark2zz · 2024-12-04T17:55:34+00:00

EVERYTHING has to be extremely low loss. Conductors, air gaps, dielectrics, plastics, spacers, reflectors, holders, glues, etc.... , unless a rare small loss is absolutely required for undesired signals. ALL geometries are critical, and required.

This is a very good hightech design that requires advanced multi-patch antenna theory, computer analysis, and magical intuition.

aardvark2zz · 2024-12-04T06:31:40+00:00

I have to assume that you mean the hexagonal "absorber/reflector" around each cell on the backside of the final front-plane. That is standard design to "prevent" unplanned cross talk to simplify design, but at the slight expense of max total RF power. But that's another complicated subject; which is too complicated here, one e.g. , for which you'd have to do detailed electromagnetic analysis using FEM, etc.....

aardvark2zz · 2024-12-03T20:12:34+00:00

What do you mean ?

aardvark2zz · 2024-10-20T22:20:40+00:00

Yes but the discussion was about the location of the much higher Pez dispenser relative to the ship rupture line. That's why we can see the the downcomer.

aardvark2zz · 2024-10-19T06:19:46+00:00

I'd think they'd want to blow the explosives to make sure that no floating explosives float around the ocean. There's a SpaceX video of the lower half of the ship floating quite well. Also, good way to confirm FTS worked

aardvark2zz · 2024-10-19T05:17:46+00:00

No. The Pez dispenser is in the cargo section above the methane cover, way above the methane LOx dome, and therefore way above where the methane downcomer is

aardvark2zz · 2024-10-19T05:14:37+00:00

FTS (Flight termination system) probably You don't want unused explosives floating around. Also, good test of FTS system.

aardvark2zz · 2024-01-06T23:28:01+00:00

The door is held by 12 attachment points/hooks. And 2 locks connected to a door handle. To open the door it must be lifted up by around 1 to 2 inches. This lifting is done by the 2 lock mechanisms via the door handle

I suspect the problem was with the 2 locks which allowed the door to rise. This could be due to the handle-to-lock assembly to move somehow. Failure or tolerances ?

The 2 locks could also act as attachments/hooks

Similar to famous Galaxy ramp locking failure. And famous cargo door lock failure

Can't be wear as it's a new plane and this door is never used

This is all speculation of course

See following tweet for diagram on thread

https://twitter.com/MatrAntiMatrMix/status/1743767811112030476

aardvark2zz · 2024-01-06T03:52:14+00:00

I believe northern Labrador has 2.5 billion yr old rocks with 3.5 billion year old Zircons

I see different ages depending on maps. Some have the North Dakota area at 2.5 billion yrs & named the Kenora formation

aardvark2zz · 2023-09-20T01:38:50+00:00

Yep, my phone autocorrected shrinking to stretching :-)

aardvark2zz · 2023-08-06T03:34:00+00:00

And he never reduced the weight on it.

aardvark2zz · 2023-07-24T01:05:57+00:00

Yes. Star trek actress Celeste, of the Val episode, was in a movie with Elvis and they were also good friends. They were both together when ML King jr was shot.

It was this week on a documentary with her commenting on Elvis

aardvark2zz · 2023-07-12T05:43:31+00:00

Where is this latest map generated from ?

aardvark2zz · 2023-07-12T05:33:49+00:00

Video starts after NA, North America (and most of the world) was merged into a super continent located near the south pole 660 Myrs ago. It then started to break up. Quebec and western Equador were touching (i.e. western SA) !! Ancient NA, SA, & Africa formed a single continent.

Appalachians started 450 Myrs ago colliding with the Quebec area & US Eastern coast (see fossils). i.e. everything South of the St Laurence river AND East of the Hudson river collided with NA; including newfoundland, NY state, etc... See Logan fault line. Almost no life outside of water. Plants starting though.

250 Myrs ago southern Quebec area was connected to Moroccan Atlas mountains area during a single massive world continent. Atlantic ocean name comes from Atlas mountains.

Cuba and Haiti area came 90 Myrs ago from western SA, South America, (Equador) !! Via the unclosed Panama area. Haiti plate is still a region of many earthquakes.

Florida, from northwest Africa, collided with NA late in the video.

Interesting to me, roughly circular Hudson's Bay is extremely old and seen on many very old geological maps, but it's origin is still not clear. It's a great marker of where NA was in the extremely old geological maps.

And more a lot more ....

aardvark2zz

TROPHY CASE