Search found 120 matches

by arvin
06 May 2018 09:42
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Train 18 appears to be our attempt to catch up with the present high speed passenger train transport with tech like aluminium body and bogies having own motors. While reading on shinkansen propulsion came across a term called VVVF (Variable voltage variable frequency) drive. The bogie motors are dri...
by arvin
28 Apr 2018 18:34
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

http://archive.indianexpress.com/news/iima-study-praising-lalu-s-railway-turnaround-was-paid-for-by-lalu-s-ministry------------------------/160344/ The study by iim A praising lalu was sponsored by his ministry at the time as per link. Some one like him who did no good for bihar in his long rule can...
by arvin
12 Apr 2018 20:50
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Was looking at a pdf booklet got in email of south west railway progress in KA as on feb. For a state the size of KA, the only double line electrified lines I found were between blr to mysore and blr to bangarpet to the east. The mysore line was only recently completed thanks to present NDA. A singl...
by arvin
11 Apr 2018 08:48
Forum: Technology & Economic Forum
Topic: Civil Aviation Development & Discussion
Replies: 4358
Views: 294846

Re: Civil Aviation Development & Discussion

Regarding 747 on japan domestic routes, googal tells me they have been retired and replaced by b777 on account of feul effeciency. Since they have to compete with bullet train , 4 engines would be at a disadvantage.
by arvin
10 Apr 2018 22:50
Forum: Technology & Economic Forum
Topic: Civil Aviation Development & Discussion
Replies: 4358
Views: 294846

Re: Civil Aviation Development & Discussion

For such slot constrained places and p2p to major metros perhaps we should look at 787 and a350 sized planes They will run full Japan uses all economy 747 on dotmestic main routes and was biggest client of 747 flights less than 2 hrs !! Exactly. If using 747 on 2 hr routes is profitable for japan, ...
by arvin
27 Mar 2018 21:14
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

http://www.railnews.in/mumbai-ahmedabad-bullet-train-to-run-every-20-minutes-in-peak-hours/ The 20 min freq during peak hours will be inadequate. A 10 min freq would be better I feel. Since there are 12 stations spaced approx 40 km apart there would be good trafic to these too. Many are industrial h...
by arvin
22 Mar 2018 11:06
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

That 9000 hp tender doesnt make sense. Plus for that there is a make in india component at chitaranjan works asansol. Duplicating work done at alsthom factory in bihar for 12000 hp.
by arvin
19 Mar 2018 17:23
Forum: Technology & Economic Forum
Topic: Civil Aviation Development & Discussion
Replies: 4358
Views: 294846

Re: Civil Aviation Development & Discussion

The most famous case of take off abort involved ex president pratibha patil heli fleet in 2009. One of the helicopter landed without permission on runway of mumbai airport just after an Air india plane had started its TO run. Plane pilot spotted it and aborted the run. Quick action by pilot saved a ...
by arvin
15 Mar 2018 13:54
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

https://swarajyamag.com/insta/faced-with-delinquent-passengers-railways-to-strip-tejas-express-of-lcd-screens-other-facilities There was no need for these screens in the first place in the age of 4g enabled devices in the first place. Many here predicted this exact fate that will fall upon these scr...
by arvin
12 Mar 2018 21:03
Forum: Technology & Economic Forum
Topic: Civil Aviation Development & Discussion
Replies: 4358
Views: 294846

Re: Civil Aviation Development & Discussion

Looks like there are two issues with these engines - HPC seal and combustor issues. Both are in the 'core'. Increase in feul effeciency led to trade off in something else??
by arvin
11 Mar 2018 12:57
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Karthik S wrote: I really hope atleast 1 more line will see the light before Mumbai Ah'bad line opens up in 2022.


Loan terms need to be as attractive as Japanese have offered us. Guess french or any one else are not ready to give with such conditions.
by arvin
11 Mar 2018 10:18
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Karthik S wrote:Why are we not looking for TGV from the French, was hoping something will happen during Macron's visit. Looks like we'll stick to Japs and Germans, who are conducting feasibility study on Chennai-Bang HSR corrdor.


Systra did the study for delhi Amritsar line. French might come on that line.
by arvin
09 Mar 2018 07:21
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Good to see your posts vsunderji!!. Finallly work moving on pune miraj line after approval in 2015. This was single line for too long and as a result most south bound trains from western India had to come via wadi gulbarga route. This along with doubling of tumkur to belgaum will allow in introducin...
by arvin
07 Mar 2018 16:07
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Looks like commie pet project of Thalaserry rail link is all set to be scrapped and would soon be dumped by central govt. The ecological cost wont be worth the investment and people in coorg and mysore are not happy with it. Also yesterday KA refused to relax the road timings ( closed between 9pm - ...
by arvin
05 Mar 2018 22:21
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

https://economictimes.indiatimes.com/industry/transportation/railways/railways-plan-rs-10-lakh-crore-high-speed-train-corridors/articleshow/63164348.cms hang on a minute.. why new corridor to just bump to 200kmph. I'd say, investment needs to be futuristic.. There were reports in 2nd week of feb wh...
by arvin
26 Feb 2018 21:22
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Nilambur should remain a dead end as it was during British times and there is no point in extending it because it doesnt make sense economically or ecologically. KA might see some benefit in the Thalaserry line because of current line has poor connectivity between manglore and banglore with grand to...
by arvin
25 Feb 2018 11:39
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

Looks like Mysore thalaserry rail link has been put on back burner by rail bhavan. This is a pet project of kerala kommies and they put their best effort to include in the last budget. With no mention of it in budget and significant people in coorg and mysore dead opposed to it, the project may not ...
by arvin
21 Jan 2018 13:39
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

we need to connect mysore by train across the wayanad ghats to kozhikode. the logistical link to north kerala and mangalore via hassan is fairly weak. http://www.indiamike.com/files/images/08/50/08/southern-railway-map.jpg Your wish will soon come true. Not kozhikode but thalaserry. The DPR is read...
by arvin
26 Nov 2017 19:31
Forum: Trash Can Archive
Topic: LCA: News & Discussions: 15 August 2017
Replies: 3500
Views: 481078

Re: LCA: News & Discussions: 15 August 2017

Thats great news. Capabilities like this might have made MOD change its mind on SEF.
by arvin
26 Nov 2017 05:50
Forum: Military Issues Archive
Topic: 'Make in India' Single engined fighter
Replies: 5425
Views: 511824

Re: 'Make in India' Single engined fighter

With the way things have gone on in last decade, I won't be surprised if these vendors blacklist India for the never ending drama for no outcome Thats the best thing to happen. Will put an end to RFI - RFP - RIP saga going for multiple deals. ISRO and BARC are examples of how sanctions have benefit...
by arvin
25 Nov 2017 13:44
Forum: Trash Can Archive
Topic: LCA: News & Discussions: 15 August 2017
Replies: 3500
Views: 481078

Re: LCA: News & Discussions: 15 August 2017

Pitot tube on radome??
by arvin
24 Nov 2017 22:39
Forum: Military Issues & History Forum
Topic: Su-30: News and Discussion - August 9, 2014
Replies: 2501
Views: 224111

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

I dont believe a word of that article.
Seems to be a tactic to know the logistics and fine print involved in Rafale buy. More importantly offset clauses and future options.
Coming on the heels of selective leaks regarding SE deals.
by arvin
24 Nov 2017 13:47
Forum: Trash Can Archive
Topic: LCA: News & Discussions: 15 August 2017
Replies: 3500
Views: 481078

Re: LCA: News & Discussions: 15 August 2017

ramana wrote:https://theprint.in/2017/11/24/single-engine-fighter-jet-procurement-hits-air-pocket-faces-questions/


Tone of article suggests no decision will be taken before 2019 :D
by arvin
18 Nov 2017 14:57
Forum: Trash Can Archive
Topic: LCA: News & Discussions: 15 August 2017
Replies: 3500
Views: 481078

Re: LCA: News & Discussions: 15 August 2017

Nice video shiv. Good description of Tejas vs mirage and others. Liked the sarcasm about Jaguar acquisition also. Good idea to put footage from bahrain air show.
On another note, todays TOI has a tender from MES, BLR for furnishing accomodation for LCA squadron in Sulur.
by arvin
11 Nov 2017 17:03
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

https://economictimes.indiatimes.com/industry/transportation/railways/road-ministry-offers-indian-railways-right-of-way-for-bullet-train/articleshow/61584544.cms In a move that could reduce costs and quicken construction of the ambitious Mumbai-Ahmedabad bullet train, the road transport and highways...
by arvin
10 Nov 2017 13:44
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 2321
Views: 251083

Re: Indian Railways Thread (Dec 2015)

People using shinkansen as a Virar local to reach from bkc to virar will be the ultimate use of the train.
by arvin
06 Nov 2017 21:12
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4220
Views: 675359

Re: Kaveri & aero-engine discussion

Borrow 1 747 from Air India and convert into flying test bed. This single act will wipe off all bad karma of Air India and help it attain moksh.
by arvin
05 Nov 2017 20:43
Forum: Trash Can Archive
Topic: Indian Economy News & Discussion - Aug 26 2015
Replies: 4573
Views: 457531

Re: Indian Economy News & Discussion - Aug 26 2015

>>talk by Nilesh shah MD of kotak mahindra

Thanks for link. Enjoyed it a lot. Lot of it can be used against those planning black day on Nov 8.
by arvin
05 Nov 2017 16:33
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 746
Views: 87306

Re: Project 75I - It Begins

In the LCA thread there was a discussion on the 1 mtr plug for mk2 and how the entire certification cycle will have to be re visited. So applying the same logic here wouldnt the scorpene have to do the same if the proposed AIP upgrade plug after 6 years is being planned. Wouldnt it effect all the ta...
by arvin
03 Nov 2017 22:08
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 746
Views: 87306

Re: Project 75I - It Begins

Once Scorpene subs enter service old subs will be decommissioned. We could use those. Its my guess kilos are not constructed modularly unlike scorpenes. Also its double hull. So cutting open a kilo to put a plug would be tricky. They could have used sindhu rakshak for this but even they might have ...
by arvin
30 Oct 2017 21:29
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 746
Views: 87306

Re: Project 75I - It Begins

Didnt see this news dated 24 oct posted here. Added later..Austin already posted link. https://theprint.in/2017/10/24/first-scorpene-to-be-commissioned-in-december-french-firm-eyes-follow-on-order/ Some interesting snippets... “The Kalvari has both a torpedo and a missile. We have fired the SM 39 an...
by arvin
30 Oct 2017 13:59
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 746
Views: 87306

Re: Project 75I - It Begins

If 3 more scorpenes are built at MDL with desi AIP and adding some MKI masala, it would be having a different signature. It would be painful to see yard idle after 2021. U209 redux.
by arvin
29 Oct 2017 20:04
Forum: Military Issues & History Forum
Topic: Indian Navy News & Discussion - 15 Dec 2016
Replies: 4521
Views: 670912

Re: Indian Navy News & Discussion - 15 Dec 2016

Viv S wrote:
Philip wrote:The MOD is finalising a non-Nuclear powered 65K behemoth powered by GTs.

FYI, the IAC Vikrant is powered by GTs as well. :roll:


Not to forget 45k vikramaditya is run by steam!!!!.
All 3 have different types of propulsion. Talk about variety.
by arvin
29 Oct 2017 16:18
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 746
Views: 87306

Re: Project 75I - It Begins

The SAAB A-26 looks to be highly optimized and designed towards only one goal in mind and that is shallow water operation. The most useful real estate of a sub, the nose where you would want to put a big sonar, A-26 has a hole for dropping frog men. It also has hot bunking unlike scorpene which has ...
by arvin
28 Oct 2017 20:29
Forum: Military Issues & History Forum
Topic: Indian Navy News & Discussion - 15 Dec 2016
Replies: 4521
Views: 670912

Re: Indian Navy News & Discussion - 15 Dec 2016

Vishal will not only be a radical design in the sense it will use EMALS, but it is also attempting to decouple mechanical gas turbine output to propeller via gearbox. If i read the article correctly propellers will be run via motors drawing power from electric system. Will like to be corrected on th...
by arvin
28 Oct 2017 14:30
Forum: Military Issues & History Forum
Topic: INS Chakra joins IN - Where is the Mithai?
Replies: 310
Views: 25551

Re: INS Chakra joins IN - Where is the Mithai?

.. I think its high time we lift the PNS Ghazi. The sea depth is about 99 foot and right at the entry to Vizag harbour. This should be lifted and installed as war trophy on vizag beach. Its sister PNS hangor is a war meuseum in karachi. Dont thiink it would be difficult since we recently lifted a k...
by arvin
28 Oct 2017 06:22
Forum: Military Issues & History Forum
Topic: Indian Navy News & Discussion - 15 Dec 2016
Replies: 4521
Views: 670912

Re: Indian Navy News & Discussion - 15 Dec 2016

i think the thermal output is measured by way of amount of steam generared via reactor heat. The MW is the mechanical work for generating electricity by turbines and running the gearbox for propeller.
by arvin
28 Oct 2017 06:02
Forum: Military Issues & History Forum
Topic: Indian Navy News & Discussion - 15 Dec 2016
Replies: 4521
Views: 670912

Re: Indian Navy News & Discussion - 15 Dec 2016

The 550MW number seems to be lifted straight out of USS Nimitz two A4W reactor output.
by arvin
26 Oct 2017 19:05
Forum: Strategic Issues & International Relations Forum
Topic: Bangladesh News and Discussion
Replies: 2469
Views: 172511

Re: Bangladesh News and Discussion

India foils coup attempt in bangladesh reports newsx. Coup meeting on oct 21 was attended by serving and retd officers. Sheikh hasina alerted about this by agencies.
by arvin
25 Oct 2017 22:40
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 746
Views: 87306

Re: Project 75I - It Begins

With Prime Minister Abe winning a resounding re-election, the Soryu could be back in the mix. Don't shoot me ok, I am allowed to dream :) Japan: Indian Navy's best partner http://www.asianage.com/opinion/oped/251017/japan-indian-navys-best-partner.html Asian Age is not allowing me to do cut-and-pas...

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