Iranian Space program

[Websorber]

Iran to launch ‘Zafar II 'early next Iranian year'

https://twitter.com/x/status/1227572467058774016

 

[OldTwilight]

So why they don't use new tech and carbon fiber body for simorgh

 

[TheImmortal]

So why they don't use new tech and carbon fiber body for simorgh

Because that ship sailed 10 years ago. Simorgh is a 10 year old SLV. It was made to be launched within 2-3 years of Safir.

Something happened in Iran’s SLV development that delayed next gen Iranian SLVs.

Sarir should have been deployed by 2015 and the successor should have been deployed by 2020.

Simorgh demonstrated Iran can build a decent 1st and a sub par 2nd stage.

 

[PeeD]

So why they don't use new tech and carbon fiber body for simorgh

Aluminium is good enough for liquid fuel SLVs.
Carbon composite pays off if you have solid fuel which creates immense stress on the casing.

 

[Hack-Hook]

Aluminium is good enough for liquid fuel SLVs.
Carbon composite pays off if you have solid fuel which creates immense stress on the casing.

good but several time heavier and Simorgh have a chronic lack of trust problem on its second stage. the easiest solution is to make it lighter

 

[PeeD]

good but several time heavier and Simorgh have a chronic lack of trust problem on its second stage. the easiest solution is to make it lighter

Without component malfunction, the Simorgh has no thrust problem.
Nor is the second stage of the Simorgh of importance, its motors are a technological deadend.
Iran needs the promised higher thrust motors for the Sarir second stage and the Simorgh has already tested its first stage.

If the Sarir is still too far away I recommend two of the unknown Iranian upper stage motors instead of the 4 R-27 veniers which work at the edge of their design in the Simorgh.

 

[Hack-Hook]

Without component malfunction, the Simorgh has no thrust problem.
Nor is the second stage of the Simorgh of importance, its motors are a technological deadend.
Iran needs the promised higher thrust motors for the Sarir second stage and the Simorgh has already tested its first stage.

If the Sarir is still too far away I recommend two of the unknown Iranian upper stage motors instead of the 4 R-27 veniers which work at the edge of their design in the Simorgh.

the problem is with second stage not first stage . so those upperstage motors are the ones which have problem

 

[Sineva]

Something happened in Iran’s SLV development that delayed next gen Iranian SLVs.

Yeah,it was called the JCPOA.

 

[Philosopher]

Rouhani's administration either out of sheer ignorance or due to being indifferent messed up in dealing with the space program. The way you silence the enemies when it comes to the space is not to reduce its pace (they'll never stop asking for more), instead you increase the space program to such a level that they realise it is beyond their political wishes and games. When they realise all their braking will have no effect, they'll be much more likely to quiet down and bark at something else. Instead, Rouhani managed to lose Iran almost 10 years worth of proper launchers and he gained nothing in return. Nothing at all.

Of course in the end, Iran's space program is beyond Rouhani, he may have slowed it down, but it cannot be stopped. It is inevitable that it will grow and hopefully do so very fast in the next administration. So to all the westerners that were cheering with their 1000 news articles due the recent launch "failure" (no such thing), enjoy these moments ! Because compared to what Iran's program will become, it is nothing right now!

 

[Galactic Penguin SST]

Again premature shut down or too low thrust of the second stage, like the last time.
Did one of the two turbopumps fail? Or one of the four motors did a safety shut down? A software error that shut off the second stage?

No Saman thrid stage was present, they wanted to keep it simple.

Maybe the R-27 venier motor is simply not suited for that long vacuum operation, as it should be significantly longer than on the Safir. Did the extension nozzle skirt fail due to overheating? Because that can't be well simulated on earth.

Wrong, official video published shows the Saman-1 upper stage, performing the final spin up orbital insertion!

Iran's Zafar satellite launch fails again

2020-02-09

According to Iran ’s official IRIB news agency, Mohammad Javad Azari-Jahromi, Iran ’s Minister of Information and Communications Technology, said: 'The Zafar (Victory in Persian) satellite will be launched from Semnan into orbit at a speed of 7.400 kilometers per second. '

The 113-kilogram Zafar satellite will be launched by the 'Simorgh' rocket into 530 kilometers Low Earth orbit. 'The main task will be to collect images. Iran needs these data to study earthquakes, respond to natural disasters and develop agriculture.'

A spokesman for the Ministry of Defense said that the satellite was launched at 19:15 and that about 90% of its orbital path was also completed. The satellite reached an altitude of 540 kilometers and a speed of 6'500 meters per second, but the satellite did not reach orbital insertion speed.

He added: "The satellite was also in orbit for a few minutes, but the orbit was not complete. At the same time, signals were received and the ground station was taking action."

In January 2019, Iran announced that its satellite Payam, which collects environmental data from Iran, failed to enter orbit.

[size=1[url="[URL]https://www.irinn.ir/fa/news/768853/%D8%B3%DB%8C%D9%85%D8%B1%D8%BA-%D8%B8%D9%81%D8%B1-%D8%B1%D8%A7-%D8%A8%D8%A7-%D9%85%D9%88%D9%81%D9%82%DB%8C%D8%AA-%D8%A8%D9%87-%D9%81%D8%B6%D8%A7-%D9%BE%D8%B1%D8%AA%D8%A7%D8%A8-%DA%A9%D8%B1%D8%AF[/URL]"]_[/url][/size]

Targeted: 530 kilometers and a speed of 7'400 meters per second
Achieved: 540 kilometers and a speed of 6'500 meters per second

This simply means that the upper stage's fuel was totally consumed but the wrong way, the Saman-1 upper stage peaking 10 km too high at the expense of a loss of speed of 900 meters/second.

One of the most frequent cause of failure in trying an orbital insertion when playing with space simulation video games such as Kerbal space!

This could happen if the upper stage is firing slightly off the optimal direction (we see it with catastrophic ending last year with the Indian Chandrayaan lunar lander).

And that engine cannot simply be shut and restarted the following orbit, because it is solid and not liquid fueled! You only have one shot.

Mission's rating

The Iranian Safir-2 carrier rocket has been successfully launched twice. The failure occurred with the Saman-1 upper stage. The launch of Iran’s Zafar-1 observation satellite was thus rated at 95% successful.

______
▲ 1. Saman-1 upper stage.

___
▲ 2. Saman-1 upper stage.


Although Iran failed to launch a satellite, it still released a video of the launch.

Video of the first and second stage：
https://media.farsnews.ir/Uploaded/Files/Video/1398/11/22/13981122000012.mp4
_


✔ Ignition at 19:18:13 ICT (UTC+3:30) 100% successful
✔ Liftoff at 19:18:16 ICT (UTC+3:30) 100% successful
✔ 1st stage engines cutoff at 19:19:57 ICT (UTC+3:30) 100% successful
✔ First stage separation at 19:20:02 ICT (UTC+3:30) 100% successful
✔ Second stage's engines ignition at 19:20:03 ICT (UTC+3:30) 100% successful
✔ Payload fairing jettisoned at 19:20:18 ICT (UTC+3:30) 100% successful
✔ End of video 19:21:02 ICT (UTC+3:30) 100% successful
✔ Second stage separation 100% successful
✗ Upper stage orbital insertion failed
✔ Upper stage separation 100% successful
Overall mission rated at: 95 % successful

Conclusion

It only requires 5% of correction, and Iran will surely succeed in its first upper stage orbital insertion next Khordad (May-June) with the back-up satellite Zafar-2.

Needless to remind that this upper stage though looking like a toy right now because of its smaller size, is key in mastering Roll and Attitude Control System (RACS), that will be required in all future advanced missions ranging from solid propellant rocket, advanced geosynchronous insertions, and of course manned spacecrafts! Call it Post Boost Vehicles (PBV) if militarized. Again core component in any nuclear deterrent.

 

[arashkamangir]

Wrong, official video published shows the Saman-1 upper stage, performing the final spin up orbital insertion!



Targeted: 530 kilometers and a speed of 7'400 meters per second
Achieved: 540 kilometers and a speed of 6'500 meters per second

This simply means that the upper stage's fuel was totally consumed but the wrong way, the Saman-1 upper stage peaking 10 km too high at the expense of a loss of speed of 900 meters/second.

One of the most frequent cause of failure in trying an orbital insertion when playing with space simulation video games such as Kerbal space!

This could happen if the upper stage is firing slightly off the optimal direction (we see it with catastrophic ending last year with the Indian Chandrayaan lunar lander).

And that engine cannot simply be shut and restarted the following orbit, because it is solid and not liquid fueled! You only have one shot.

Mission's rating

The Iranian Safir-2 carrier rocket has been successfully launched twice. The failure occurred with the Saman-1 upper stage. The launch of Iran’s Zafar-1 observation satellite was thus rated at 95% successful.

______
▲ 1. Saman-1 upper stage.

___
▲ 2. Saman-1 upper stage.


Although Iran failed to launch a satellite, it still released a video of the launch.

Video of the first and second stage：
https://media.farsnews.ir/Uploaded/Files/Video/1398/11/22/13981122000012.mp4
_


✔ Ignition at 19:18:13 ICT (UTC+3:30) 100% successful
✔ Liftoff at 19:18:16 ICT (UTC+3:30) 100% successful
✔ 1st stage engines cutoff at 19:19:57 ICT (UTC+3:30) 100% successful
✔ First stage separation at 19:20:02 ICT (UTC+3:30) 100% successful
✔ Second stage's engines ignition at 19:20:03 ICT (UTC+3:30) 100% successful
✔ Payload fairing jettisoned at 19:20:18 ICT (UTC+3:30) 100% successful
✔ End of video 19:21:02 ICT (UTC+3:30) 100% successful
✔ Second stage separation 100% successful
✗ Upper stage orbital insertion failed
✔ Upper stage separation 100% successful
Overall mission rated at: 95 % successful

Conclusion

It only requires 5% of correction, and Iran will surely succeed in its first upper stage orbital insertion next Khordad (May-June) with the back-up satellite Zafar-2.

Needless to remind that this upper stage though looking like a toy right now because of its smaller size, is key in mastering Roll and Attitude Control System (RACS), that will be required in all future advanced missions ranging from solid propellant rocket, advanced geosynchronous insertions, and of course manned spacecrafts! Call it Post Boost Vehicles (PBV) if militarized. Again core component in any nuclear deterrent.

+1 cookie for KSP reference.

 

[Philosopher]

Arash:

 

[yavar]

 

[VEVAK]

https://www.farsnews.ir/news/139811...-در-پرتاب-ماهواره-ظفر-محقق-شد-زمان-پرتاب-ظفر۲

The launch time for Zafar2 is yet to be determined!

 

[VEVAK]