Search found 768 matches

by neerajb
14 Dec 2023 08:24
Forum: Science, Economics & Technology Forum
Topic: Indian Space Program: News & Discussion
Replies: 1010
Views: 591862

Re: Indian Space Program: News & Discussion

Aditya-L1's SUIT captures full-disk images of the Sun in near ultraviolet wavelengths

https://www.isro.gov.in/Aditya_L1_SUIT.html
by neerajb
16 Nov 2023 16:50
Forum: Military Issues & History Forum
Topic: Pakistan Armed Forces: News & Discussion
Replies: 2329
Views: 966561

Re: Pakistan Armed Forces: News & Discussion

Adityaji If you look at the stolen Q400 youtube videos, that turbo prop airliner was doing loops. Bandar with afterburning turbofan should be able to do it easily.

Why it doesn't do it only PAF can tell.
by neerajb
16 Nov 2023 14:19
Forum: Military Issues & History Forum
Topic: Pakistan Armed Forces: News & Discussion
Replies: 2329
Views: 966561

Re: Pakistan Armed Forces: News & Discussion

If one can maintain sufficient initial speed and Gs, it should be able to complete the loop. Bandar is 8 G rated, so pulling out of the dive should not be a problem. What structural/FBW issues?
by neerajb
07 Aug 2023 15:11
Forum: Military Issues & History Forum
Topic: Indian Air Force News & Discussion - 23 March 2021
Replies: 2209
Views: 769503

Re: Indian Air Force News & Discussion - 23 March 2021

That clip has a C-5 retraction in between two C-17 shots. But it is amazing to see how no lines are visible after all those several doors shut! But the landing gear innovation award should go to Mig-23. It always amazes me how that chunky landing gear goes inside that tiny landing gear bay with that...
by neerajb
04 Aug 2023 10:42
Forum: Science, Economics & Technology Forum
Topic: Indian Space Program: News & Discussion
Replies: 1010
Views: 591862

Re: Indian Space Program: News & Discussion

Elon said the following on usage of stainless steel by Spacex in starship instead of Aluminium/carbon fiber: Carbon Fiber Composite: 1. Costs 130$/kg 2. For Starship needed a huge autoclave (9 meters dia, 70 meters length) 3. Composites are porous to hot gases, needs an inner liner which adds to cos...
by neerajb
06 Sep 2022 15:51
Forum: Military Issues & History Forum
Topic: INS Vikrant: News and Discussion
Replies: 3269
Views: 794222

Re: INS Vikrant News and Discussion

...Reliance Naval and Engineering Limited, in Gujarat has yard capacity for such ships, but it went bankrupt waiting for orders. The dry dock is capable of building ships with 400000 tons..... The dry dock infrastructure of Reliance Naval should still exist. It started as Pipavav shipyard and had a...
by neerajb
17 Aug 2022 12:18
Forum: Science, Economics & Technology Forum
Topic: AI/Machine Learning, Bharat and Bhartiya IT Industry
Replies: 434
Views: 159190

Re: AI/Machine Learning, Bharat and Bhartiya IT Industry

Just read this thread and replying very very late. ArjunPanditji if latency aka real-time is not an issue then Python is really versatile, easy to use and has large number of libraries for virtually everything and that's why it is popular even among non-programming folks (which was the idea to star...
by neerajb
04 Aug 2022 23:39
Forum: Science, Economics & Technology Forum
Topic: Indian Sports and Entertainment Industry
Replies: 6359
Views: 1308643

Re: Indian Sports and Entertainment Industry

I saw rocketry recently and have a query related to a scene depicting Vikas engine's initial test. The engine is mounted on a test stand and is covered in white stuff presumably ice. When it ignites, it melts away revealing the metal beneath. I have seen some cryogenic engines firing and they are fr...
by neerajb
29 Jul 2022 13:22
Forum: Military Issues & History Forum
Topic: Indian Air Force News & Discussion - 23 March 2021
Replies: 2209
Views: 769503

Re: Indian Air Force News & Discussion - 23 March 2021

I was listening to Finnish (?) pilot's experiences with Mig-21(fighter pilot podcast). If the afterburner is not disengaged on a Mig-21 after takeoff, it goes dry in 7 minutes! Host asked him the max allowed time on afterburner. He said not needed as it goes out of fuel before the engine overheats. ...
by neerajb
29 Jun 2022 14:19
Forum: Military Issues & History Forum
Topic: Armoured Vehicles: News & Discussion
Replies: 2333
Views: 794618

Re: Armoured Vehicles: News & Discussion

in a Twin Turbo era CRDVE come up with Single Turbo that too in a "V" engine, sigh! just call Tata they have 600 HP twin turbo in line 4 DOHC engines in their stable. What’s wrong with a single turbo again? If two is better, why not 3 or 4 turbos? They would be 3 to 4 times better..no? Wa...
by neerajb
20 Apr 2022 16:12
Forum: Mil-Tech Archive
Topic: Indian Missiles News & Discussions - 17 Dec 2018
Replies: 5960
Views: 2250122

Re: Indian Missiles News & Discussions - 17 Dec 2018

Yes exit hole. Check the metal triangle in the first pic for reference.
by neerajb
17 Mar 2022 19:15
Forum: Strategy, Politics & International Relations Forum
Topic: 2021 Strategic and Political Analysis-1
Replies: 14901
Views: 2782319

Re: 2021 Strategic and Political Analysis-1

Watched The Kashmir Files with parents today. Chose 9 am show to avoid crowds. Theater was 70% full. Pindrop silence during intermission and at the end. Parents felt disgusted with peacefuls and the end shook them emotionally. I feel thankful to Vivek Agnihotri for choosing this subject and showing ...
by neerajb
04 Jan 2022 11:30
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

Usually the main landing gear is located at the CG of commercial aircrafts and it is done for easy handling during take off. When loaded, the CG moves around this point but within a limit. To cater to this, pitch trim is used so that the aircraft handles the same way. When the trim is changed, it mo...
by neerajb
04 Jan 2022 01:05
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

Could be weight and balance issue or related. Elevator trim at takeoff is based on CG calculations. If the calculation is off or trim is set incorrectly, it can cause early rotation or difficult rotation (if set too nose heavy). A Northwest A320 faced similar issue of early rotation due to incorrect...
by neerajb
17 Sep 2021 18:17
Forum: Strategy, Politics & International Relations Forum
Topic: Wuhan Coronavirus Resource Thread
Replies: 14441
Views: 2707148

Re: Wuhan Coronavirus Resource Thread

Question for Gurus: It appears to me that, at the current pace, all eligible adults in India will get their first doses by mid-November. 99% of these first doses will be either Covishield or Covaxin, as no other vaccine will be available in bulk by then. This means that, subsequently, all second do...
by neerajb
09 Sep 2021 14:57
Forum: Strategy, Politics & International Relations Forum
Topic: 2021 Strategic and Political Analysis-1
Replies: 14901
Views: 2782319

Re: 2021 Strategic and Political Analysis-1

I believe you are referring to this Transaction Processing Facility . Amex, Visa, Sabre, Amadeus, 911 and lots of airlines and aggregators use it or used it in the past. It was the goto solution for extremely high volume and latency sensitive requirements like real-time reservation and financial sys...
by neerajb
11 Aug 2021 21:10
Forum: Science, Economics & Technology Forum
Topic: Indian IT Industry
Replies: 1372
Views: 436029

Re: Indian IT Industry

I have a Brother inkjet (J885DW) and it runs out of ink every few months. I was able to get aftermarket cartridges from Amazon for $20 (larger quantity). It stopped printing! Luckily I found out that the head was dirty, so I cleaned that and it worked (for now). What laser printer did you buy? I ma...
by neerajb
06 May 2021 12:46
Forum: Science, Economics & Technology Forum
Topic: AI/Machine Learning, Bharat and Bhartiya IT Industry
Replies: 434
Views: 159190

Re: AI/Machine Learning, Bharat and Bhartiya IT Industry

Just read this thread and replying very very late. ArjunPanditji if latency aka real-time is not an issue then Python is really versatile, easy to use and has large number of libraries for virtually everything and that's why it is popular even among non-programming folks (which was the idea to start...
by neerajb
08 Mar 2021 20:28
Forum: Strategy, Politics & International Relations Forum
Topic: Wuhan Coronavirus Resource Thread
Replies: 14441
Views: 2707148

Re: Wuhan Coronavirus Resource Thread

My father went in at 11 am and came out by 2 pm including 30 min observation time. My mother arrived at 9 am and she was out before 12 with 30 mins observation period.
by neerajb
08 Mar 2021 12:57
Forum: Strategy, Politics & International Relations Forum
Topic: Wuhan Coronavirus Resource Thread
Replies: 14441
Views: 2707148

Re: Wuhan Coronavirus Resource Thread

Got my parents vaccinated two days back in Delhi. Registration is mandatory via cowin or arogya setu app. During fore noon session, hospitals allow only those who have registered. After 3 pm, walk-ins are allowed. Hospital staff get those registered using onsite computers. You still need to be 60+ o...
by neerajb
26 Feb 2021 16:45
Forum: Military Issues & History Forum
Topic: Twin Engine Deck Based Fighter (TEDBF): News & Discussion
Replies: 769
Views: 333643

Re: Twin Engine Deck Based Fighter (TEDBF): News & Discussion

On page one, the unfolded and folded wingspan got swapped, Please correct it.
by neerajb
19 Feb 2021 15:01
Forum: Military Issues & History Forum
Topic: Twin Engine Deck Based Fighter (TEDBF): News & Discussion
Replies: 769
Views: 333643

Re: Twin Engine Deck Based Fighter (TEDBF): News & Discussion

Why RATO not popular with ski jump carriers for increasing payload? Not all missions will need to carry max payload and when needed RATO can be used.
by neerajb
26 May 2020 01:06
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

https://youtu.be/bM9ZrliDkNA Looks like plane was high during approach and touched down 4500 feet down the runway instead of usual 1500. Whether landing gear malfunctioned or pilot forgot to deploy it is unclear. Multiple chimes heard during approach for first landing indicating some problem. After ...
by neerajb
23 Apr 2020 10:30
Forum: Trash Can Archive
Topic: Su-30MKI: News and Discussion - August 9, 2014
Replies: 4118
Views: 1185523

Re: Su-30MKI: News and Discussion - August 9, 2014

Rakesh wrote: F-22 air intake. The fit and finish of the F-22 (and yes the picture below is likely a production version) is far ahead of the Su-57.
That apparent fit finish is a thick layer of makeup only. This is how a raptor looks like in squadron service.

https://youtu.be/8FQt0mR2ykQ

Cheers....
by neerajb
22 Apr 2020 13:40
Forum: Military Issues & History Forum
Topic: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019
Replies: 2685
Views: 1018993

Re: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019

Difficult to say how much without specific configuration. For fighter it may and for civilian jets i may not. Also depends on Tail vs canard vs tailless config. But in general for fighters, FBW allows you to have relaxed static stability which allows you to trim, for same condition, at lower AoA an...
by neerajb
13 Apr 2020 22:03
Forum: Military Issues & History Forum
Topic: Newbie Corner & Military Miscellaneous - Aug 2016
Replies: 221
Views: 123663

Re: Newbie Corner & Military Miscellaneous - Aug 2016

Yes. I saw it in a bollywood song and was scratching my head for weeks. The hump, fuselage and wings were distinctly 747 but those podded twin engines didn't make any sense. Finally I searched for odd 747 variant and got the following.

https://en.m.wikipedia.org/wiki/Boeing_747_G-BDXJ
by neerajb
26 Mar 2020 18:06
Forum: Strategy, Politics & International Relations Forum
Topic: Wuhan Coronavirus Resource Thread
Replies: 14441
Views: 2707148

Re: Wuhan Coronavirus Resource Thread

Sirs, I have no data but there was a sudden death in our locality. All symptoms and past history medical/travel is suggestive of what was the reason. Local doctor and the one who declared the demise is saying the same thing. Government contacted, not a word on it and certainly the number didn't bump...
by neerajb
26 Mar 2020 17:07
Forum: Strategy, Politics & International Relations Forum
Topic: Wuhan Coronavirus Resource Thread
Replies: 14441
Views: 2707148

Re: Wuhan Coronavirus Resource Thread

I am no expert but a recent event nearby makes me think that: 1. The numbers being reported do not reflect reality. Not fudging the numbers but general callousness of government apparatus towards public in general is causing the low confirmed numbers. 2. Few prospective cases are being tested likely...
by neerajb
24 Mar 2020 12:19
Forum: Military Issues & History Forum
Topic: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019
Replies: 2685
Views: 1018993

Re: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019

The traditional autoland in commercial airlines is ILS only and this capability is there since long, nothing new there. So I believe Dileep is referring to AI computer vision guiding the plane with ILS aiding it or the other way round. Again like a human pilot monitoring the ILS landing, ready to ta...
by neerajb
23 Mar 2020 16:11
Forum: Military Issues & History Forum
Topic: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019
Replies: 2685
Views: 1018993

Re: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019

Artificial intelligence is like trying to guess/predict vs exact measurement (with sensors and a program). Traditionally, humans code software for all possible scenarios that one could encounter for a specified task like, say, auto landing/takeoff which is complex, testing intensive and error prone....
by neerajb
11 Feb 2020 18:30
Forum: Trash Can Archive
Topic: 2020 Strategic and Political Analysis-1
Replies: 10196
Views: 2079351

Re: 2020 Strategic and Political Analysis-1

IMHO delhites are better off financially than rest of India comparatively. I have seen many in my circle appreciative of freebies even when they dont need it. Many are crorepati types. Greed and selfishness has no ends it seems.
by neerajb
11 Feb 2020 00:40
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

Just guessing here. Maybe the pilots are using higher flex temp than needed or using TOGA during hot and high to have more buffer and this is what the report is alluding to. But in any case, it should not lead to failures if they are observing the operational limits.
by neerajb
01 Feb 2020 09:44
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

What amazes me is why MCAS was designed to operate out of one aoa sensor. Max already has two sensors, all they needed was to use data from both. Secondly mcas had no min max values for stab movement. That is another blunder. Every time it triggered, it used aoa value to calculate stab movement irre...
by neerajb
31 Jan 2020 22:10
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

IMO MCAS is all about money and not safely or stall avoidance. Mcas doesn't work with flaps extended so any use cases involving landing and takeoff are ruled out. Mcas was created to allow max to grandfather the certification from 737 NG. Boeing told regulators that max is an iteration over the earl...
by neerajb
30 Jan 2020 10:22
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1214002

Re: Civil Aviation Development & Discussion

IMO, the huge engines were moved forward and upward to accommodate them under wing. MLG was also modified to increase ground clearance without impacting the wheel well size. This caused a pitchup tendency during high AOA and thrust situations ONLY due to engine nacelle generating extra lift which wa...
by neerajb
23 Dec 2019 14:09
Forum: Science, Economics & Technology Forum
Topic: Indian Autos Thread -2
Replies: 703
Views: 252443

Re: Indian Autos Thread -2

the Tigor EV comes with a piddly 40hp engine and costs 12 odd lakh rupees. The torque curve of electric motors is pretty flat and quite independent of RPM unlike an ICE. EV's drivability is super smooth and almost linear unlike an ICE and is great in an urban environment. The 100 bhp ICE would be g...
by neerajb
23 Dec 2019 13:47
Forum: Science, Economics & Technology Forum
Topic: Indian Autos Thread -2
Replies: 703
Views: 252443

Re: Indian Autos Thread -2

With 300+ range it should be ok for commuting to work and local usage. Any idea as to price? That's what Tata claims. It has 30.2 KWHr battery. In actual conditions of a full load of 4-5 passengers, cargo , and with AC on, range will be reduced by half. Some 17 lakhs is quite expensive. Not exactly...
by neerajb
08 Oct 2019 23:08
Forum: Military Issues & History Forum
Topic: VayuSena Rafale: News and Discussions - 17 Oct 2016
Replies: 4656
Views: 1449700

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

neerajb...i am arguing that AWACS and even 1950's radars can place self a/c withing visual range of enemy a/c. the imaginary box u mention is much bigger than visual ranges. seems Meteors and amraams D have this datalinking capability. i need to meet Hansel v soon !!! I saw a documentary on Su-15 F...