Search found 659 matches

by arvin
26 Feb 2024 23:01
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

https://i0.wp.com/spacenews.com/wp-content/uploads/2024/01/20240125-4_01_LEV-2-JAXA-cr.jpg?resize=1024%2C648&ssl=1 SLIM lander has survived the lunar night. It responded to commands sent by mission control. My guess is, its upside down orientation with part of the body touching the lunar surfac...
by arvin
23 Feb 2024 05:56
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 2792
Views: 1220510

Re: International Aerospace Discussion - Jan 2018

https://www.space.com/intuitive-machine ... r-payloads

IM's Odysseus has landed on rhe moon.
Signal received is weak, could be antenna orientation issu.e .
First US landing after apollo and first private lander on moon.
by arvin
06 Dec 2023 19:27
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Chandrayaan-3 Mission: Ch-3 's Propulsion Module (PM) takes a successful detour! In another unique experiment, the PM is brought from Lunar orbit to Earth’s orbit. Although orbiting earth, looks like apogee of PM is quite close to Moon's SoI (Sphere of influence). Interesting they didnt bring it cl...
by arvin
05 Dec 2023 05:54
Forum: Science, Economics & Technology Forum
Topic: Indian Space Program: News & Discussion
Replies: 1010
Views: 591686

Re: Indian Space Program: News & Discussion

Excellent job ISRO for bringing back the PM. India becomes 4th country to demonstrate breaking free from lunar gravity to re enter earth orbit. My post on 22nd Aug 2023 in CY 3 thread. https://forums.bharat-rakshak.com/viewtopic.php?p=2598146#p2598146 I think the PM alone can be bought back. The Pro...
by arvin
22 Sep 2023 21:30
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

A Nandy wrote: 22 Sep 2023 11:55 https://www.youtube.com/watch?v=ewuV1xx_Nrk

Asianet News ‘Dialogues’ with ISRO Chairman S Somanath
Thanks for posting.
Towards the end at around 35.17 there is mention of human landing on the moon.
The hop experiment was a baby step in that direction.
by arvin
08 Sep 2023 08:58
Forum: Military Issues & History Forum
Topic: Artillery Corps: News & Discussion
Replies: 3200
Views: 1666131

Re: Artillery Corps: News & Discussion

So, how does ATAGS’s “shoot & scoot” ability compare with the Bofors in service with the IA? I remember it was a key criterion when Bofors was selected There are less than 200 of the original 400 Bofors guns left in service. For the first time we have multiple locally designed and produced alte...
by arvin
05 Sep 2023 21:21
Forum: Science, Economics & Technology Forum
Topic: Aditya-L1 (आदित्य -L1): Launch and Discussions
Replies: 119
Views: 31559

Re: Aditya-L1 (आदित्य -L1): Launch and Discussions

^^^
Parker solar probe closest approach to sun will be 6.9 million km in 2025.
They will be able to shield the electronics even at such close proximity.
by arvin
04 Sep 2023 13:10
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Vikram soft-landed again! https://twitter.com/isro/status/1698570774385205621?t=NahcNIZWvh9syahBc5l6mg&s=19 Did we know this was planned? Wow! What a nice surprise. :D :D :D Its indeed a welcome surprise. Was able to lift up by 40 cm. Will give useful insight for thrust required for sample retu...
by arvin
29 Aug 2023 08:24
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

^^^
Luna 25 weighs 1.8 tons with scientific payload of 30 kg.
Beyond earth it was propelled by Fregat space tug which was their equivalent of CH3 propulsion module.
by arvin
27 Aug 2023 17:59
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

^^^ SSSalvi Sir, About RHU I dont think the news is credible. If it indeed carried one, the CH3PM needs to have the distinctive radiator fins. None of it was visible. DAE would have been involved from the very begining and safety measures would have different. Such things can't be done hush hush due...
by arvin
23 Aug 2023 20:55
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

putnanja wrote: 23 Aug 2023 20:52
sanman wrote: 23 Aug 2023 20:49 First image from Vikram of the Moon's surface following the landing:


Can you please share the source of the image? Would be good to show the source when posting images
https://www.news18.com/india/chandrayaa ... 47583.html
by arvin
23 Aug 2023 18:04
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Congratulations ISRO!!!!!
by arvin
22 Aug 2023 09:25
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Even more feul would have been left over, if we allowed the cryogenic stage to burn to depletion as was done during CY2. From Wikipedia Finally Chandrayaan-2 was launched on board the LVM3 M1 launch vehicle on 22 July 2019 at 09:13:12 UTC (14:43:12 IST) with a better-than-expected apogee as a result...
by arvin
22 Aug 2023 08:58
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

SSS and other gurus, i was looking at dry mass and wet mass of CY-3, looks like there might be fuel left in PM, how i wish ISRO surprises us with Vikram taking off mating with PM and coming back to earth and crash burning. Hope CY-4 is already being planned for to-fro trip I think the PM alone can ...
by arvin
21 Aug 2023 20:47
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

One side whole India is praying and is with ISRO and at other end is Actor like Prakash Raj mocking ISRO - see his tweet below :evil: While the actor did not specify the man in the cartoon, many social media users slammed the actor for making fun of former Indian Space Research Organisation chief K...
by arvin
20 Aug 2023 17:25
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Regarding Luna 25, hope Kremlin acts professionally and supports Roscosmos to investigate, rectify and relaunch.
Kinzhal aftermath treason incidents shouldn't be repeated.
by arvin
10 Aug 2023 11:10
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

^^^
ISRO's semi cryo is staged combustion cycle, which is far more difficult to master.
Agnikul might be using gas generator I guess. Their chamber pressure is only 10 bar
by arvin
25 Jul 2023 16:05
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

5th orbit raising maneovure done

https://twitter.com/isro/status/1683767 ... gr%5Etweet

Orbit expected to be 127609 km x 236 km.

Aug 1 will be TLI firing
by arvin
24 Jul 2023 07:29
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Amber G, the quoted part in your above post is written by sanman. SSSalvi missed the "quote" while quoting him so its seen as a continuos post.
by arvin
22 Jul 2023 09:20
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

In case of Earth-Moon pair The L1 distance from earth centre is 323050 Kms.( 316672 kms above Earth. ) For TLI orbit Apogee is 362000 kms, way beyond L1. Moon is away when CH3 is in the Apogee. In fact the CH3 is moving away from Moon initially. But its speed is more so it comes towrds CH3. As time...
by arvin
18 Jul 2023 17:53
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

3rd orbit raising maneovure performed successfully as per ISRO.

https://twitter.com/isro/status/1681236 ... 74850?s=20
by arvin
16 Jul 2023 22:28
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

https://m.timesofindia.com/home/science ... 804633.cms

2nd orbit raising maneovure done.
Perigee at 220 km and will remain there for next three orbit maneovure.
by arvin
16 Jul 2023 07:25
Forum: Military Issues & History Forum
Topic: VayuSena Rafale: News and Discussions - 17 Oct 2016
Replies: 4656
Views: 1449544

Re: VayuSena Rafale: News and Discussions - 17 Oct 2016

^^^
Younger Ambani's streak of turning to dust anything he touches continues.....
by arvin
15 Jul 2023 23:49
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

https://www.livemint.com/news/india/chandrayaan3-launch-live-updates-india-moon-mission-isro-sriharikota-news-isro-india-space-isro-live-11689296703954.html First orbit raising maneovure done. ISRO Scientists at the Indian Space Research Organisation have performed the first orbit raising manoeuvre ...
by arvin
14 Jul 2023 15:12
Forum: Science, Economics & Technology Forum
Topic: Chandrayaan 3: Launch and Discussions
Replies: 1352
Views: 541443

Re: Chandrayaan 3: Launch and Discussions

Congratulations ISRO!!

Image
by arvin
26 May 2023 09:09
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 2792
Views: 1220510

Re: International Aerospace Discussion - Jan 2018

^^^ So the new owner of Cosmic girl B747 is Stratolaunch. They already own the six engined beast which can air launch heavier loads. $17 million is approx Rs 140 crores. Less than the cost of prime real estate govt owns in mumbai or delhi. We should have taken a shot at owning it considering it was ...
by arvin
04 May 2023 22:38
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 2792
Views: 1220510

Re: International Aerospace Discussion - Jan 2018

https://spaceq.ca/ispace-provides-a-clue-on-fate-of-the-hakuto-r-mission-1-lunar-lander/ Some info on Hakuto lander final moments before crashing on the moon. ispace also stated that they “confirmed that the lander was in a vertical position as it carried out the final approach to the lunar surface....
by arvin
30 Apr 2023 19:02
Forum: Military Issues & History Forum
Topic: Russian-Ukranian War: Geopolitical Fallout
Replies: 2709
Views: 621999

Re: Russian-Ukranian War: Geopolitical Fallout

^^^
They morphed Goddess Kali into a distasteful cartoon in
a mushroom cloud.
by arvin
26 Apr 2023 08:54
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 2792
Views: 1220510

Re: International Aerospace Discussion - Jan 2018

Japanese start up ispace has lost contact with Hakuto lander. Looks like it had a hard landing in its attempt to land yesterday. My guess is it could not get the transition from horizontal to vertical position correctly. Similar to what Vikram lander experienced. There is some trick of trade to get ...
by arvin
25 Apr 2023 19:47
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 2792
Views: 1220510

Re: International Aerospace Discussion - Jan 2018

https://www.reuters.com/technology/space/japans-ispace-prepares-worlds-first-commercial-lunar-landing-2023-04-25/ TOKYO, April 25 (Reuters) - Japanese startup ispace inc (9348.T) is preparing to land its Hakuto-R Mission 1 (M1) spacecraft on the moon early on Wednesday, in what would be the world's ...
by arvin
02 Apr 2023 13:06
Forum: Science, Economics & Technology Forum
Topic: Indian Space Program: News & Discussion
Replies: 1010
Views: 591686

Re: Indian Space Program: News & Discussion

Neela wrote:
Towards the end of the video , as the aircraft came to stop, there were balance issues after two distinct brake events c.
Could be absence of shimy damper in nose wheel.
by arvin
22 Mar 2023 20:48
Forum: Military Issues & History Forum
Topic: INS Vikrant: News and Discussion
Replies: 3269
Views: 794198

Re: INS Vikrant: News and Discussion

Nice, Mig 29 had earlier raced with Ferrari in Goa. It was covered in the 2018 issue of Auto car.
by arvin
07 Mar 2023 13:43
Forum: Science, Economics & Technology Forum
Topic: Indian Space Program: News & Discussion
Replies: 1010
Views: 591686

Re: Indian Space Program: News & Discussion

^^^
Very informative. Thanks for sharing.
Good info on how IMU's were in the sixties.
Everything now is chip based and is far easier to configure.
More reliable than Mechanical gyroscopes that suffer from gimbal lock issues.
by arvin
01 Mar 2023 22:33
Forum: Military Issues & History Forum
Topic: Military Flight Safety
Replies: 3349
Views: 809201

Re: Military Flight Safety

https://swarajyamag.com/defence/mirage-2000-su-30-mki-mid-air-collision-initial-findings-of-investigation-into-the-accident-submitted-to-air-force The findings of the Court of Inquiry (CoI) of a mid-air collision between two Indian Air Force (IAF) fighter jets, a SU-30MKI and a Mirage-2000, will be ...
by arvin
24 Feb 2023 07:10
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 1806
Views: 520792

Re: Project 75I - It Begins

^^^ From the article, looks like South Korea's bid is facing a legal challenge from TKMS over design copy issue. Brilliant move to scuttle them in the final lap for re-entering the contest. Its close to 10 years since this thread started, even paperwork is not in place. Designing own submarine from ...
by arvin
10 Feb 2023 09:46
Forum: Science, Economics & Technology Forum
Topic: Indian Space Program: News & Discussion
Replies: 1010
Views: 591686

Re: Indian Space Program: News & Discussion

All fixes worked as planned. Mission accomplished.
by arvin
08 Feb 2023 20:13
Forum: Science, Economics & Technology Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 4767
Views: 1447418

Re: Indian Railways Thread (Dec 2015)

.^^^
Something wrong with the way Maths is taught there. Navantia built submarines that were 100 tons overweight and had buoyancy issue.