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Search found 3122 matches

by JayS
20 Apr 2018 22:45
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Some interesting History https://www.icast.org.in/news/2005/oct05/oct04db.html While Air Vice Marshal Roy Chowdury, the founder director, initiated the project as an engine technology startup, Arun Prasad developed test facilities. Dr R Krishnan concentrated on materials and metallurgical support, b...
by JayS
20 Apr 2018 20:15
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 1120
Views: 147012

Re: Indian Economy News & Discussion - Nov 27 2017

Should have done already! Big harassment for people who move from one state to another especially in IT. Also big headache to get NOC, payment of other states' taxes etc. Its been pending for many years. Transport unions also oppose this as it would reduce their freedom to do whatever they want to ...
by JayS
20 Apr 2018 18:59
Forum: Technology & Economic Forum
Topic: Civil Aviation Development & Discussion
Replies: 4330
Views: 288336

Re: Civil Aviation Development & Discussion

Looking at the pictures above (B737), though the events started by FBO, the fan containment case itself is not the culprit, its the Nacelle which fails to contain the damage. This is typically Aircraft OEM's component rather than the Engine OEM. Interestingly FAA was working on issuing AD to enforce...
by JayS
20 Apr 2018 17:39
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Why do we need antifreeze for Indian operations requiemnts. I would imagine that heat generated by gas turbine would be sufficient to turn ice into water for injection into the engine. Besides do we know for certain that Kaveri will be using water injection for extra thrust? Its just an idea that i...
by JayS
20 Apr 2018 08:03
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 1041
Views: 163669

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

I missed exact natire of this first time I read, i thought its the same system that ADA was talking for normal AF LCA or NLCA.. Relised only while reading actual interview. It must be an extension of the auto take off of NLCA. The takeoff from terra firma is going to be easier. The landing part wil...
by JayS
19 Apr 2018 23:56
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 1041
Views: 163669

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

8,We have received the approval to prove unmanned technologies like auto take-off and landing on LCA for future uses. the unmanned version will sport flush air data system technology for stealth features. the design of the front also will be modified. the project will begin immediately after the fo...
by JayS
19 Apr 2018 22:55
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 1041
Views: 163669

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

At Defexpo Aeromag was hanging out show daily, the day 1 issue has an interview of Dr. Giridh Director of ADA with title 'LCA Tejas to be fully operational with AAR soon' which has a lot of info and updates, will list out some of them 1, currently focusing on increasing the flying rate of MkI to 60...
by JayS
19 Apr 2018 21:10
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 1041
Views: 163669

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

6months for modifications and 24months for flight trials. Clearly this is not the topmost priority and they must have placed the flights in existing schedule. Total only 45 flights are needed otherwise. All details of steps given in tender. Quite a few systems need modification including even HMDS. ...
by JayS
19 Apr 2018 19:28
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Re SCB Tech, I have posted details about level DMRL is at. They have cracked Casting. Two other key techs which are needed to get to the final blades are being worked on by MIDHANI.
by JayS
19 Apr 2018 19:26
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Indranil wrote:Integration of Manik engine with Nirbhay has begun. GTRE has sent out a tender for the manufacturing of the engine bay. This will be completed in 120 days.


Great news.
by JayS
19 Apr 2018 19:25
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

11 yrs ago at Aero India they showed indigenous SCB. Hmmmmm :-? ……….. and yet ………… in the recently put out Request For Information For Procurement Of {110} Fighter Aircraft For The Indian Air Force under the “Key Technology Domain” of Engine the first of the “Technologies Sought’ is: (a) Single Cry...
by JayS
19 Apr 2018 15:40
Forum: Military Issues & History Forum
Topic: Newbie Corner & Military Miscellaneous - Aug 2016
Replies: 90
Views: 14231

Re: Newbie Corner & Military Miscellaneous - Aug 2016

Wasn't sure whether the following question was qualified for the Tejas thread or not hence posting it here. The first image in the above post shows a very assymetric load out of the aircraft. Was wondering if this load out was practically feasible for operations?? Its not all that extreme. I am sur...
by JayS
19 Apr 2018 15:18
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

2. The Turbine Entry Temperature hit the limits during take off and initial climb phases. These are the "most demanding" on engines phase of flight . TET rarely is a big limiter in normal conditions of cruise , dash etc.. .. That's not true. Not generally at least. TET is a very real limi...
by JayS
19 Apr 2018 15:07
Forum: Military Issues & History Forum
Topic: UAVs, Drones, Remote Surveillance Tech
Replies: 2141
Views: 346266

Re: UAVs, Drones, Remote Surveillance Tech

Looks single engined, maybe a tech demonstrator. Some older designs seemed like twin engine designs. Also, with 4 Kaveris we can make our own vulcan sized UAV to fill the role of mid sized bomber. AURA was always single engined AFAIK. There is a TD program SWIFT which will precede AURA, looks like....
by JayS
18 Apr 2018 20:57
Forum: Technology & Economic Forum
Topic: Civil Aviation Development & Discussion
Replies: 4330
Views: 288336

Re: Civil Aviation Development & Discussion

Verybtragic incidence. CFM failed to check all engines for already known defect.
by JayS
18 Apr 2018 20:51
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Funding is pending clearance for last 3-4 yrs. I had posted quite a bit of details from various Parliamentary committee reports.
by JayS
17 Apr 2018 21:52
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

^^ I have been saying the exact same thing since last Aero India.
by JayS
17 Apr 2018 21:48
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3523
Views: 592378

Re: Indian Missiles News and Discussions - May 2017

My knowledge of seekers is rather limited. So another noob query. Which one of the two, IIR or MMW would be better for Heli based AAM missile to supplant the mistral based ATAM we are using on Rudra/LCH..? I think is a low hanging fruit to develop a ATAM for our forces and we have all the building ...
by JayS
17 Apr 2018 21:37
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 1120
Views: 147012

Re: Indian Economy News & Discussion - Nov 27 2017

For the currency shortage, I think there maybe overissue of the Rs. 2000 note taking a lion's share of the overall notes in circulation and correspondingly less in lower denominations. The government is also trying to control the overall amount of liquidity creating a cash crunch, especially of muc...
by JayS
17 Apr 2018 16:07
Forum: Military Issues & History Forum
Topic: DefExpo 2018 Chennai
Replies: 314
Views: 23248

Re: DefExpo 2018 Chennai

I finally got my pics sorted out. Will post a few over here. Which is the best medium to upload pics over here ? Imgur /tinypic/anything else ? Any hosting site is OK which gives sharable link. I use photo bucket. Imgur et al are also OK. Google Drive not OK as the images are not embedded in the po...
by JayS
17 Apr 2018 15:56
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

And there is no stage matching. Yes I agree as now Pt2/Pt6 is around 1.2 which is way too high. It has to be too around 1.05 The TET should be limited to 1400K in ISA conditions as per the GTX cycle. I am still not able to get my head around with this TET. I feel it is too low TET to be realistic. ...
by JayS
17 Apr 2018 15:48
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3157
Views: 331727

Re: AMCA News and Discussions

Rafale used F404 for its TDs.
by JayS
17 Apr 2018 13:15
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3523
Views: 592378

Re: Indian Missiles News and Discussions - May 2017

Some noob questions. Came some good soul summarize what all we know about SANT..? Is SANT supposed to replace HELINA? If not how both are relevent at the same time..? How SANT is different from HELINA..? Is seeker different..? Apart from higher range of coarse. I tried to speak with the official re...
by JayS
17 Apr 2018 11:25
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Madhu, here is a summary of the Kaveri parameters from my set of calculations. I am yet to do the stage matching and thus the W numbers are out of sync. But I realised that the specified PR values cannot be taken as constants and would need to be varied to converge the calculations. This is for uni...
by JayS
17 Apr 2018 11:17
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3523
Views: 592378

Re: Indian Missiles News and Discussions - May 2017

Some noob questions.
Came some good soul summarize what all we know about SANT..? Is SANT supposed to replace HELINA? If not how both are relevent at the same time..? How SANT is different from HELINA..? Is seeker different..? Apart from higher range of coarse.
by JayS
17 Apr 2018 11:14
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3523
Views: 592378

Re: Indian Missiles News and Discussions - May 2017

ramana wrote:Ok I got it now. It a transportation container/canister for rocket motors weigh up to 70 tons.
One can manually rotate the cannister for inspections etc.


Or perhaps manual mechanical system is backup in case hydraulic powered system fails..?
by JayS
17 Apr 2018 09:02
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3157
Views: 331727

Re: AMCA News and Discussions

The numbers could be for one of the displayed configs. However they are quite close to actual numbers from EOI. Thus the weight numbers must be also in the correct ballpark. I wonder why the EOI has given some of the figures like fuselage volume and other such seemingly unnecessary data. But from th...
by JayS
16 Apr 2018 22:11
Forum: Military Issues & History Forum
Topic: DefExpo 2018 Chennai
Replies: 314
Views: 23248

Re: DefExpo 2018 Chennai

I suggest that in future,all defexpos should have only biz visitors ,or hugely increase the cost of open day tkts.,and the habit of free passes to DPSU families and friends banned.Otherwise it becomes just another tamasha. If there are more people coming, just extend the show. Foreign OEMs can be s...
by JayS
16 Apr 2018 21:30
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

Madhu, here is a summary of the Kaveri parameters from my set of calculations. I am yet to do the stage matching and thus the W numbers are out of sync. But I realised that the specified PR values cannot be taken as constants and would need to be varied to converge the calculations. This is for unin...
by JayS
16 Apr 2018 15:37
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3157
Views: 331727

Re: AMCA News and Discussions

That was what I was getting at as well. There was a good reason that the F-22, F-35 and the SU-57 went on to develop dedicated next-generation engines. While the enhancements to the F414 will increase its overall thrust, the jury is still out that if and when they are actually funded, how much enha...
by JayS
16 Apr 2018 15:29
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3157
Views: 331727

Re: AMCA News and Discussions

^^ Right. F135 gives about 125kN dry thrust while 2xF414 would give ~115kN. AMCA is lighter by about ~1.5T empty weight. Given F35 cannot supercruise in a practical sense, AMCA is also unlikely to do so. But with 115-120kN class engine, things will become interesting for AMCA. I have not found any s...
by JayS
16 Apr 2018 14:28
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3157
Views: 331727

Re: AMCA News and Discussions

Take Off clean weight = 20000kg Empty weight = 12000kg So are you saying we are already pushing for roughly 8000 kgs of fuel? minus the weight of pilot and some stuff (200 kgs) I aint saying nothing. ADA spec sheet says so. :mrgreen: 7500-8000kgkg is a good number, I would say. AMCA is overall comp...
by JayS
16 Apr 2018 12:47
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

It is never possible to stock up on spares, because even GE knows which are mission critical spares and can restrict or trickle supply such spares to client. They can sense your motives in stocking up large amount of spares and can restrict supply that just meets a few months attrition on some excu...
by JayS
16 Apr 2018 12:01
Forum: Military Issues & History Forum
Topic: VayuSena Rafale: News and Discussions - 17 Oct 2016
Replies: 716
Views: 106161

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

Prem wrote:Airware tit bits of Rafale


What a beauty.

What would be the CAP mission radius/on station time specs for this config...??
by JayS
16 Apr 2018 11:52
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 2773
Views: 207725

Re: Indian Roads Thread

States are not going to easily give up control over RTOs and traffic policing . Revenue source ... Road tax should be brought under the purview of GST as much as possible. The rest should be linked to Centralized law system - one Nation one System. IMO, Central govt can try model that they have for...
by JayS
16 Apr 2018 11:30
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 4205
Views: 666028

Re: Kaveri & aero-engine discussion

But their engines are firmly in and are in for a long haul. Thats still a significant leverage. Unless we break the jinx with Kaveri we will be tied one way or the other. JayS sir, how much can the engine sanction affect us?An engine has even if russian has 1000 hour life (rough figures from Su30mk...
by JayS
16 Apr 2018 11:20
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A News & Discussions: 09 February 2018
Replies: 1041
Views: 163669

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

ramana Sir, I cleaned up the thread. So let continue with relevant discussions. We have a special thread dedicated to DDM I suppose. That would be good place to collect and debunk junk/propaganda articles. Anyways. I am mighty impressed by IAF's show in Gaganshakti and really really happy that IAF h...
by JayS
16 Apr 2018 11:12
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3157
Views: 331727

Re: AMCA News and Discussions

Philip sahab, your post is moved where it belongs, whine thread, along with other posts replying to that.. Please continue discussion there if anyone wants to.
by JayS
14 Apr 2018 12:27
Forum: Military Issues & History Forum
Topic: India's R&D in Defence DRDO, PSUs and Private Sector
Replies: 3045
Views: 227042

Re: India's R&D in Defence DRDO, PSUs and Private Sector

How many times have L&T to prove that they are reliable defence manufacturers. Ships to tracked howitzers, always on or before time, on or less than budget! L & T is India's one tru Engg biggie, spanning whole lot of sectors. But I think they lack lobbying power with politicos like what Ada...

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