China's Space Program News Thread
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I was concerned about this; this is the rocket that failed its previous launch (the Indonesian satellite). Unfortunate, but better to delay the launch than lose such a symbolically important payload.
Do you know how long it has been postponed?
Does anyone know how often launches like this are delayed due to routine pre-checks at the last minute?
This is not a new rocket, it's the Long March 3B which has been around forever. The Beidou satellite has been launched successfully dozens of times. I find it suspicious that all of a sudden it's having problems like some experimental rocket.
by78
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Helmholtz resonators have been tested for manned space launches. Their purpose is to reduce noise inside the cargo fairing during a manned rocket launch, thereby improving crew comfort. The tests show they are effective at reducing noise by 6-8 decibels, and so they will be used in future missions.
wondering if they can be used inside submarine to improve sailors living conditionsHelmholtz resonators have been tested for manned space launches. Their purpose is to reduce noise inside the cargo fairing during a manned rocket launch, thereby improving crew comfort. The tests show they are effective at reducing noise by 6-8 decibels, and so they will be used in future missions.
Declaimer: my ranting is not aimed at youChina has successfully completed the first in-orbit tests of Hall-effect thrusters.
I have found many web sites reporting it to be the FIRST IN ORBIT which is very strange, because China has tested more than one such thrustors in orbit many years ago, and probably using them on deployed satellite (the first DFH-5 deployed by CZ-5 not long ago). Some site titled it "first small power ..." which is even more weird because if one has a Farrari, what is there to brag about having a grocery shopping car?
The only thing I see is that it is the first such device mounted on a "commercial/private" satellite. The thrusters are still made by state institute (502 where I once worked as intern). And I know 502 is not specialized in thruster design, its expertise is telemetry.
This is why I dislike culture of private space enterprises (SpaceX being the one who started the culture), that is BRAGGING, big mouth and little feet. Huyou (忽悠). The truth is that the private company got a second class device from an institute who wants to exploit some new development, the company then pay for an article to get fame to huyou(忽悠) investors.
To summarize,
- Hall effect thruster has been tested in space flight on satellite XY-2 in 2014.
- DFH-3B platform employs LIPS-200 Hall thruster
- DFH-5 employs LIPS-300, the satellite was successfully placed in space few month ago.
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