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41
Historical Spaceflight / Re: DC-X Program
« Last post by Remes on Today at 12:30 pm »
great insights

42
Other US Launchers / Re: US Launch Schedule
« Last post by Salo on Today at 11:05 am »
https://www.spacex.com/launches/mission/?missionId=sl-6-60
Quote
SpaceX is targeting Monday, May 27 for a Falcon 9 launch of 23 Starlink satellites to low-Earth orbit from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida. Liftoff is targeted for 7:30 a.m. ET, with backup opportunities available until 11:30 a.m. ET. If needed, additional opportunities are also available on Tuesday, May 28 starting at 7:30 a.m. ET.

A live webcast of this mission will begin on X @SpaceX about five minutes prior to liftoff. Watch live.

This is the 10th flight for the first stage booster supporting this mission, which previously launched Crew-6, SES O3b mPOWER, USSF-124, and six Starlink missions. Following stage separation, the first stage will land on the A Shortfall of Gravitas droneship, which will be stationed in the Atlantic Ocean.
B1078.10
43
My read on the test card for Flight 4 is that they had major icing problems with IFT-3 that can't be easily solved for this flight, so they'll test what they can test and make major design changes to later booster/ship sets.  I imagine they need to fix ice and/or cavitation problems on both stages, and it won't be easy.

So how are they getting icing in the LOX.
I can see how they get ice in the LCH4. Anywhere the fuel is in contact with steel with LOX on the other side you can get ice formation. Mainly the downcomer. Possibly the inter dome during 0 g.

EDIT: so in the thread
https://forum.nasaspaceflight.com/index.php?topic=60479.msg2594456#msg2594456

The suggestion is that the autogenous pressurization doesn't use heat exchangers(no part is best part) and takes the hot O2 from the oxygen preburner with H2O and CO2 and injects that into the tank. This will result in solid H2O and solid CO2 in the LOX which could be the clogging source in the LOX.
On the methane side they could be tapping off the hot CH4 after the nozzle cooling and therefore hasn't been contaminated with H2O and CO2.
44
Chinese Launchers / Re: G60 x 18 - ? - ? - 2024
« Last post by mikezang on Today at 10:58 am »
九城携手 G60科创走廊加速培育长三角新质生产力
Quote
Jiucheng joins hands with G60 Science and Technology Innovation Corridor to accelerate the cultivation of new quality productivity in the Yangtze River Delta

It is reported that in December last year, the first satellite intelligent manufacturing digital factory in the Yangtze River Delta located in the G60 Cloud Corridor was put into production. It has now formed a G60 constellation industry cluster integrating R&D, manufacturing, operation and maintenance, and application. The first batch of satellites this year will be launched in Taiyuan in August, and the launch of 108 satellites will be completed within the year. In the future, 14,000 low-orbit broadband satellites will be networked.
The first batch G60 might be launched in August from Taiyuan.
45
Chinese Launchers / Aomen Kexue-2 - CZ-2C? - Jiuquan - 2026
« Last post by mikezang on Today at 10:49 am »
“澳科一号”卫星在轨运行一周年系列活动在澳门举办
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A series of activities to mark the first anniversary of the in-orbit operation of the "Macau Science-1" satellite were held in Macau

It is reported that the follow-up satellite of "Macau Science No. 1" "Macau Science No. 2" is being actively prepared. It is planned that the "Macau Science No. 2" satellite will be able to be launched in the second half of 2026. Together with the "Macau Science No. 1" satellite, it will form the world's first ideal polar-orbiting satellite and low-inclination satellite constellation, forming the world's first high-precision stereoscopic observation system of the Earth's magnetic field and the three-dimensional structure of the Earth's space environment, creating a new aerospace technology platform in Macau and contributing to the diversification of Macau's science and technology industry.
The Aomen Kexue-2 might be launched in 2nd half of 2026.
46
“澳科一号”卫星在轨运行一周年系列活动在澳门举办
Quote
A series of activities to mark the first anniversary of the in-orbit operation of the "Macau Science-1" satellite were held in Macau

47
So no reuse of the hot-stage adapter? Hopefully that is a temporary measure.

I am 99% certain that is the case since it feels weird and very unlike the idea of a rapidly reusable rocket has additional parts, pretty sure it’s going to be integrated to the booster in a more ideal way. I am sure that’s why the design for starship 2 and onwards has a different design in the slides.

The hot stage ring will always take a beating. It may simply not be economically worthwhile to engineer it to be reusable.

Reusability is not the design intent; cadence, capability and cost are being optimised for.
48
ISS Section / Re: Expedition 71 thread
« Last post by Targeteer on Today at 10:17 am »
The crew has activated some new HD video downlink to MCC-H which is amazing the everyone on the ground and allowing them to see "an unrivaled start field view" and satellites--not identified...
49
Other US Launchers / Re: US Launch Schedule
« Last post by Salo on Today at 10:13 am »
https://x.com/planet4589/status/1794273001778958584
Quote
Jonathan McDowell @planet4589
LAUNCH at 0741 UTC May 25 of Rocket Lab Electron with JPL's PREFIRE-1 cubesat to study polar IR heat loss
50
Rocket Lab / Re: Rocket Lab launch schedule
« Last post by Salo on Today at 10:12 am »
https://x.com/planet4589/status/1794273001778958584
Quote
Jonathan McDowell @planet4589
LAUNCH at 0741 UTC May 25 of Rocket Lab Electron with JPL's PREFIRE-1 cubesat to study polar IR heat loss
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