Search found 1906 matches

by PratikDas
04 Feb 2020 12:59
Forum: Military Issues Archive
Topic: Modi Appoints Chief of Defence Staff (CDS): News and Discussions
Replies: 216
Views: 47199

Re: Modi Appoints Chief of Defence Staff (CDS): News and Discussions

Re-posting from the ABM/Missile Defence thread with permission. Russia Begins Production of S-400 Air Defence Systems for India I've often wondered why Indian defense deals come with so many notifications, as if begging for opposition. For example: 2014 Missile Monitor, Russian Air Force: India inte...
by PratikDas
04 Feb 2020 12:54
Forum: Military Issues & History Forum
Topic: ABM/Missile Defense Discussion
Replies: 1941
Views: 427547

Re: ABM/Missile Defense Discussion

Russia Begins Production of S-400 Air Defence Systems for India MOSCOW (Sputnik) - Russia has begun production of S-400 air defence missile systems for India, Russian Industry and Trade Minister Denis Manturov said. <snip/> Previously, Rosoboronexport Director General Alexander Mikheev said that Ru...
by PratikDas
28 Jan 2020 12:53
Forum: Military Issues & History Forum
Topic: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019
Replies: 259
Views: 54369

Re: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019

Abhibhushan ji, thank you for this. Puts to rest questions like, "how is this an attribute of the aircraft?" Hot refuelling is safety design factor. If you design the refuelling activity to be safe while the engine(s) are running then there is no bar to hot refuelling. HTT-40 has achieved ...
by PratikDas
27 Jan 2020 05:57
Forum: Military Issues & History Forum
Topic: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019
Replies: 259
Views: 54369

Re: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019

Same old re-hashed arguments ad nauseum for a couple of decades now. Basically any excuse to justify inertia. This process works very well and is used more or less in the same way worldwide How many air forces have a basic trainer that can hot refuel and change crew while the engine is running? That...
by PratikDas
27 Jan 2020 05:04
Forum: Military Issues & History Forum
Topic: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019
Replies: 259
Views: 54369

Re: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019

mea culpa. I was not clear. For the Indian Armed Forces, flight training is not some ad hoc process. For the Indian Armed Forces, it has a very specific laid down syllabus that is followed. The syllabus varies specifically as per the training being done. And in the Indian Armed Forces, deviations i...
by PratikDas
27 Jan 2020 04:13
Forum: Military Issues & History Forum
Topic: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019
Replies: 259
Views: 54369

Re: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019

I think the suggested improvement is that instructor and trainee aren't limited to one sortie due to fuel load and can quickly get back in the air to try and improve upon technique used or not used in the earlier flight while that flight's experience is still fresh in the mind, so the trainee gets ...
by PratikDas
26 Jan 2020 13:01
Forum: Military Issues & History Forum
Topic: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019
Replies: 259
Views: 54369

Re: HTT-40 Basic Trainer Aircraft: News & Discussions - 08 September 2019

https://twitter.com/hvtiaf/status/1221104381220683782 ---> Little things that matter Big time. Hot refueling HTT-40. No other trainers possess. Continuous operations throughout the day. Only 1xTRS over 8-10 sorties during the day. Imagine graduating dozens of additional pilots every year with this ...
by PratikDas
09 Oct 2019 02:25
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 3623
Views: 1081995

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

To brag a bit, we are currently breaking our heads on how to dissipate something like 6 kilowatts from a small Aluminium brick, and maintain it at some where less than 40 Deg C. Not for flight though. But it may help bring flights down one day. Dileep ji, you probably already know about this but pl...
by PratikDas
25 Aug 2019 23:39
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 3623
Views: 1081995

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Rs 250 crore - Rs 275 crore works out to what? USD $35 - $40 million per aircraft? Is my conversion match correct? So what changed that the price of each bird dropped by so drastically - Rs 175 Crores? Apparently HAL thought Price Gouging is not just done by the foreign suppliers, but it should too...
by PratikDas
18 Mar 2019 12:01
Forum: BR Nostalgia Archive
Topic: Shri Manohar Parrikar condolence thread
Replies: 108
Views: 15033

Re: Shri Manohar Parrikar condolence thread

Manohar Parrikar and his wife Medha who succumbed to cancer in 2001 https://i.imgur.com/JTULXScl.jpg https://i.imgur.com/VBmOhyHl.png https://i.imgur.com/y26AkGTl.jpg https://i.imgur.com/9mf7Qi0l.jpg https://i.imgur.com/2Dw78kXl.jpg https://i.imgur.com/0lkPATkl.png https://i.imgur.com/VP6m42Vl.jpg h...
by PratikDas
05 Mar 2019 13:17
Forum: Military Issues & History Forum
Topic: Indian Nuclear Submarines -3
Replies: 1505
Views: 258480

Re: Indian Nuclear Submarines -3

hgupta wrote:Why are we paying $3 billion dollars for a ten year lease of a nuke sub? We should be buying it not leasing for that kind of money.

It's a nuclear sub and not for sale.
by PratikDas
17 Feb 2019 03:04
Forum: Military Issues Archive
Topic: Pulwama Attack
Replies: 2282
Views: 238074

Re: Pulwama Attack

Requesting *everyone* to #BoycottPakistaniGoods

Click for a hi-res, shareable version
Image
by PratikDas
08 Feb 2019 12:04
Forum: Military Issues & History Forum
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4358
Views: 1043174

Re: Indian Space Program: News & Discussion - Sept 2016

Singha wrote:^^ then how come Ariane5 uses LH2/LOX mix for all its engines? someone was saying thats the exilir of life and the most tfta combo of fuel.

It's pretty good :)

Image

Source:http://www.rocket-propulsion.info/resources/articles/LPRE.pdf
by PratikDas
08 Feb 2019 03:42
Forum: Military Issues & History Forum
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4358
Views: 1043174

Re: Indian Space Program: News & Discussion - Sept 2016

Prasanna ji, I found another paper on the metholox engine, same authors. It looks like that they are modifying the CUS engine. May be this is o shorten the time to get to a first prototype engine. But, I don't see why one would replace LH2+LOX with LCH4+LOX. Also, in my heart of hearts, I hope for ...
by PratikDas
04 Feb 2019 07:01
Forum: Strategic Issues & International Relations Forum
Topic: International Nuclear Watch & Discussion
Replies: 1368
Views: 127954

Re: International Nuclear Watch & Discussion

DOE Awards $111 Million to U.S. Vendors to Develop Accident Tolerant Nuclear Fuels January 31, 2019 WASHINGTON, D.C. – The U.S. Department of Energy’s (DOE) Office of Nuclear Energy (NE) has awarded $111.2 million to three industry partners to develop Accident Tolerant Fuels (ATF). General Electric...
by PratikDas
04 Feb 2019 06:17
Forum: Technology & Economic Forum
Topic: Indian IT Industry
Replies: 1169
Views: 186050

Re: Indian IT Industry

Posting on behalf of a friend who isn't on this forum but goes by the name synusthesia : 3SdSKZFoUa8 A Beautiful presentation of how C++ is being used on Mars Rover curiosity. A software engineer from JPL gave this presentation at a C++ conference. My Key takeways: ⋅ C++ was chosen because...
by PratikDas
29 Jan 2019 01:06
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 1922
Views: 378953

Re: International Aerospace Discussion - Jan 2018

Austin wrote:Very interesting video from ISS Live Feed

UFO or Hoax? WATCH Mysterious Space Objects Buzz Across ISS Live Stream

https://sputniknews.com/viral/201901281 ... -sighting/

Seems like tumbling payload fairings to me.
by PratikDas
28 Jan 2019 08:35
Forum: Military Issues & History Forum
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4358
Views: 1043174

Re: Indian Space Program: News & Discussion - Sept 2016

Singha wrote:Japan quickfire sslv called epsilon

https://youtu.be/xanBJkkBH-A

A more relevant launch this January was successful.

Fireworks start at 30 minutes.

by PratikDas
27 Jan 2019 06:04
Forum: Military Issues & History Forum
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4358
Views: 1043174

Re: Indian Space Program: News & Discussion - Sept 2016

I think C32 is just C25 but with more fuel. Not a new engine but a new stage with bigger tanks. Perhaps this is obvious to everyone.
by PratikDas
26 Jan 2019 00:03
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 1922
Views: 378953

Re: International Aerospace Discussion - Jan 2018

Elon Musk's pitch for stainless steel instead of composites: https://www.popularmechanics.com/space/rockets/a25953663/elon-musk-spacex-bfr-stainless-steel/ Ryan D’Agostino: You’ve been busy redesigning Starship. Elon Musk: Yes. The design of Starship and the Super Heavy rocket booster I changed to a...
by PratikDas
22 Jan 2019 11:33
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1523
Views: 129659

Re: INS Vikramaditya: News and Discussion

Lashes on grandma :rotfl:
by PratikDas
21 Jan 2019 15:18
Forum: Military Issues & History Forum
Topic: Indian Missiles News & Discussions - 17 Dec 2018
Replies: 3602
Views: 1007828

Re: Indian Missiles News & Discussions - 17 Dec 2018

K-15 test


K-4 test


Quite obviously two very different missiles.
by PratikDas
21 Jan 2019 15:11
Forum: Strategic Issues & International Relations Forum
Topic: Understanding the US - Again
Replies: 5327
Views: 704406

Re: Understanding the US - Again

I'm not a US citizen but I feel qualified to opine thanks to my Bachelor Degree in Common Sense from the University of Being 40 Years Old that when it comes to a shutdown of the US government, the much revered US Constitution almost got it right but failed miserably - like a saddle point in math tha...
by PratikDas
20 Jan 2019 11:50
Forum: Mil-Tech Archive
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 3909
Views: 1013930

Re: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018

Tejas - LCA's Post 14th series produced Tejas, LA - 5014 had her maiden flight yesterday. The 13th member will follow soon. The competition between the two assembly hangars is intensifying. Competition, in one sense, indicates better days are ahead. https://www.facebook.com/tejas.lca/posts/210476366...
by PratikDas
10 Jan 2019 05:08
Forum: Military Issues & History Forum
Topic: Indian Navy News & Discussion - 03 July 2018
Replies: 3014
Views: 750728

Re: Indian Navy News & Discussion - 03 July 2018

nachiket wrote:The new Mumbai-Ahmedabad HSR being built with Japanese help is going to be integrated with the 155mm Dhanush howitzer with two guns mounted on the first and last coaches for self defense against stone throwers and cattle and trucks wandering onto tracks.

:rotfl:
by PratikDas
07 Jan 2019 23:36
Forum: Military Issues & History Forum
Topic: International Military Discussion
Replies: 2974
Views: 429633

Re: International Military Discussion

Israeli F-15 lands safely after losing canopy at 30,000 feet JERUSALEM: The crew of an Israeli air force F-15 warplane fought freezing temperatures and buffeting winds to bring their aircraft down after its cockpit canopy flew off at 30,000 feet, the military said on Monday. In a dramatic cockpit v...
by PratikDas
07 Jan 2019 23:32
Forum: Mil-Tech Archive
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 3909
Views: 1013930

Re: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018

There is no way that IAF/babus will pay more than 1.5x for MK1A than what they are paying for LCA MK1 FOC. This 400 crore per plane cannot be The flyaway cost. IAF/MOD created a committee to look into the price escalation by HAL for MK1A. Nothing has come out which suggest that the committee found ...
by PratikDas
07 Jan 2019 11:42
Forum: Mil-Tech Archive
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 3909
Views: 1013930

Re: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018

Indranil wrote:Jaguar Ms have the 2032. Darin IIIs have the 2052s, IAF's first AESA in service.

Is there any good news on the performance of the 2052 on the DARIN III Jaguars? Is it like having cataracts removed?
by PratikDas
07 Jan 2019 07:16
Forum: Mil-Tech Archive
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 3909
Views: 1013930

Re: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018

So after some internal research I got permission and had autonomy to go with addition of certain alloys that inhibited coarse grain formation to a large extent into these alloys. The result HAL acceptance rates went up and mgmt were happy to see the rejection rate come down. Mgmt was also happy sin...
by PratikDas
05 Jan 2019 07:25
Forum: Mil-Tech Archive
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 3909
Views: 1013930

Re: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018

ArjunPandit wrote:Thanks for making up my day, should we send a 324 tshirt to the retd admiral?

:rotfl:
by PratikDas
30 Dec 2018 12:31
Forum: Military Issues & History Forum
Topic: Russian Weapons & Military Technology
Replies: 1811
Views: 355665

Re: Russian Weapons & Military Technology

Manish_P wrote:Public release cut-out of the Nuclear Powered Torpedo

Any translators here?


This is a start:
https://www.popularmechanics.com/military/weapons/a22537135/russias-nuclear-tsunami-apocalypse-torpedo-is-named-poseidon/

Image
by PratikDas
28 Dec 2018 00:58
Forum: Military Issues & History Forum
Topic: International Military Discussion
Replies: 2974
Views: 429633

Re: International Military Discussion

Mach 27 is 9.2 km/sec , To maintain those speed at 100-200 km altitude where HGV flies most of time and maintain maneuver in lateral and vertical movement for ICBM range as it flies needs a great capability in Hypersonic Aerodynamics and material/structural engineering because most RV would simply ...
by PratikDas
28 Dec 2018 00:06
Forum: Military Issues & History Forum
Topic: Indian Missiles News & Discussions - 17 Dec 2018
Replies: 3602
Views: 1007828

Re: Indian Missiles News & Discussions - 17 Dec 2018

Regarding lofted trajectories and their technical purpose, as opposed to their operational purpose where one can use their imagination, this post from Haridas ji in the locked thread was short and sweet. ⋅  Lofted trajectory: Max Q pressure ⋅  Depressed trajectory: Max temperatur...
by PratikDas
27 Dec 2018 11:24
Forum: Military Issues & History Forum
Topic: US military, technology, arms, tactics
Replies: 1817
Views: 340056

Re: US military, technology, arms, tactics

It has some catching up to do given that its competitor has been flying for more than a year now and may upend its first flight by hitting its top cruise speed target of 280 knots around the same time. I’m not a pilot. Nevertheless, from an ease-of-use and operational-safety perspective I’d think t...
by PratikDas
27 Dec 2018 10:34
Forum: Military Issues & History Forum
Topic: US military, technology, arms, tactics
Replies: 1817
Views: 340056

Re: US military, technology, arms, tactics

https://www.armytimes.com/resizer/oAa35l5z0VxCd9MlM_PkhsmCcLA=/1200x0/filters:quality(100)/arc-anglerfish-arc2-prod-mco.s3.amazonaws.com/public/B66P23SDNVAN7F3O2UOOYOKBR4.jpg https://www.armytimes.com/resizer/g7-kzDLMZxY95xjoLVuQjoxxpng=/600x0/filters:quality(100)/arc-anglerfish-arc2-prod-mco.s3.am...
by PratikDas
25 Dec 2018 01:39
Forum: Military Issues & History Forum
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4358
Views: 1043174

Re: Indian Space Program: News & Discussion - Sept 2016

Thr video will be of least interest other than for PR. Its the telemetry data and voice transmission they will be worried about. Any higher speed video transmissions will be when they are ovuserhead. I watched Apollo and even for ISS video transmission is selective. IDSS is to reduce download to no...
by PratikDas
24 Dec 2018 00:44
Forum: Military Issues & History Forum
Topic: Kaveri & Aero-Engine: News & Discussion
Replies: 5271
Views: 1139229

Re: Kaveri & Aero-Engine: News & Discussion

dinesh_kimar wrote:We airily talk about matching Ariane using SB stages.

Just 4 years back, 1800 kg was unobtanium.

With Kaveri, it's the same condition, the physics and the engineering.

Once it's done with 81 KN and 1100 kg weight, we can scale up.


Excellent post, Dinesh ji!
by PratikDas
24 Dec 2018 00:30
Forum: Military Issues & History Forum
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4358
Views: 1043174

Re: Indian Space Program: News & Discussion - Sept 2016

https://acadpubl.eu/jsi/2018-118-16-17/articles/16/77.pdf Article on IDRSS satellite system that we are launching Thank you for sharing this informative paper. I don't understand why they're aiming so low at 400 kbps for Human Space Program (HSP) video. https://i.imgur.com/mB5kQS9m.png To put the 4...

Go to advanced search