Bharat Rakshak

Shalav

JF-17 is all metal it will always be heavier than high composite LCA Tejas, while Russian Tech is improving I suspect in case of this Rd-93 it probably have lower MTBF. Still, it is probably an improvement in maneuverability over the existing JF-17 models? The point of comparison is the baseline JF...

Shalav

The peasant needs to prove he can hunt and bring his own food to the table before the lairds share their table with him. It's share and share alike after the first feast.

Shalav

Jags with high wing loading can do it (LCA cannot, very low wing loading, it will crash if flies near the ground with so much turbulence, or the pilot would have separate barf bag attached to his suite). pVgSlaNXHeg NoE flying for delta wings is mitigated to a great extent by FBW (starts at 1:10) k...

Shalav

MOM and Chandrayaan 2 oribital animations

http://sankara.net/

Shalav

A lot of that originally quoted price is the cost of imported components. I wouldn't be surprised if HAL leans on the govt. to separately procure the engines and other imported items and then reduces the price appropriately. Inevitably with a separate and very likely uncoordinated procurement proces...

Shalav

ArjunPandit wrote:now its on frontpage of wsj
https://www.wsj.com/articles/pakistan-s ... 1551251647

Unpaywalled

Shalav

Press conf. started

https://youtu.be/tmRg3Z_92AM.

DD live

Shalav

It had to happen sometime!

I like the also notice the non-slip coating on top of the ERA blocks. These attentions to minor detail contribute towards TFTA'ness and expen$$$e of their militarized hardware.

Shalav

I don't begrudge the IA better arms. I only resent their (to me) cavalier attitude when actually making the selections. There seems to be no long term plan, no research. The IA has thousands if not 10 of thousands of people working in machine shops and armories. They have a budget of 10 of thousands...

Shalav

Shouldn't the IA have thought about it BEFORE changing to 5.56? After all they are the professionals! They told us they needed the 5.56 because it had better terminal ballistics amongst other best of brochure characteristics. Heck right here in the forum everyone in favour of the change stated the s...

Shalav

]Reactive armour being fitted on an M1A2.

Interestingly note the blast deflection semi-tubes to protect dismounted infantry.

https://youtu.be/MN7EAG-7Pj0?t=2m40s

Shalav

I'm very sure that's not it. IIRC One of the reasons to justify the calibre change was the 7.62x51 had terminal ballistics which penetrated flesh but did not cause great wound damage before passing through the body. The justification for 5.56x45 was that it's terminal ballistics caused it to tumble ...

Shalav

Too true. Someone may have seen the brochure for the Baretta ARX160 and sent that onwards and upwards to an RFP. Eventually the ARX 160 ended up as the ARX 200 for the 7.62x51 calibre. Presently the ARX 160 can only do 5.56x45 and 7.62x39 and ONLY with a complete Barrel + Bolt + Lower receiver chang...

Shalav

So 20 years ago the IA decided they wanted to retire their 7.62 x 51 FN FAL's (Ishapore 1A1) in favour of the 5.56 x 45 NATO. Some of the reasons given among many IIRC was that they wanted to reduce the burden on soldiers by using lighter calibre ammo and they wanted a more modern calibre ballistics...

Shalav

Inside a Saturn 1 kerosene fuel tank during flight.

One of the inside of a Hydrogen tank.

Shalav

He was a Druze.

From Wikipedia "The Druze faith incorporates elements of Gnosticism, Neoplatonism, Pythagoreanism, Ismailism,[25] Judaism,[16] Christianity,[16] and Hinduism"

Shalav

TOW has a achilles heel. the operator must be in a relatively clear firing position above the battlefield to both keep lasing... IIRC TOW is optically guided, it guides its missile by comparing a light on the missile body vs the LoS view of the launcher sight. The Soviet equivalent is the Konkurs. ...

Shalav

SS contributions are available after contributing for 40 credits. 1 calendar quarter = 1 credit. Hence 40 credits means 10 years of contribution. After this you will be eligible to receive SS benefits on reaching retirement age.

Shalav

Singha wrote:Syed akbaruddin? Or is he slated for London or other big posting?

Permanent UN Rep.

Shalav

thawks fell on TSP also and were promptly sold to china. being iran, the russians can ask for the wrecks be returned. the iranians might take a look for their own uses before returning. If this happened and the Iranians get a look at the tech. - a couple of 3 years from now suddenly the Iranians wi...

Shalav

...we will probably go easier on these dense packed boast. We are going to see largish lightly armed ships, that can stay out at sea for long, with load outs of more refined (costly) longer range missiles. Sirji Our longest ranged naval missiles have 1/3rd the range of the Kalibr. :(( I'd rather ou...

Shalav

RE: Turkish Airspace Apparently last year Turkey imposed a unilateral buffer zone 5km deep into Syrian airspace, after (what they say) a SAAF MiG23 intruded into Turkish airspace. Since then SAAF aircraft have not flown within 5 km of the border with Turkey. To all practical purposes this also serve...

Shalav

What's with the Taliban and Kunduz? General Dostum's the Afghani VP now isn't he?

Shalav

3-4 years ago I was trying to find out/demonstrate how a ski jump helps and made a video. I did not remember it or bother putting it online until today. It's not a world changing video - but its something :) https://www.youtube.com/watch?v=Nn_Yb1mySvo Nn_Yb1mySvo Perfect! This is the kind of "...

Shalav

Nitpick accepted. Moving on Vina is incorrect. There is no such thing as airflow parallel to the wing in an angled takeoff. All airflow is always parallel to the ground . Airflow does not magically change direction to be parallel to the wing when AoA is changed for a climb rotation, then change dire...

Shalav

Cosmo - the IN is impressively frugal, jugadu and innovative. They tend to get the best from their machines Indian or phoren. I'm betting the Vikrant will be used for a long time. so one could scrap it as bigger carriers are built, but it it more likely the IN will use it in some capacity till EoL. ...

Shalav

The "airflow" is the headwind (either due to the movement of ship or natural wind blowing or both), flowing horizontally; when the a/c takes off, this wind hits the bottom of the wing surface. Because of this, apart from the normal lift, the wing produces additional lift like that of a ki...

Shalav

Err...That is what an increased AoA is supposed to do. Which according to Vina is not applicable and I am "mouthing off", as per him it is really airflow beneath the wing! Oh BTW you do realise this ski-jump principle works on land too right? See videos of N-LCA test or the latest F35 ski-...

Shalav

In Doc2 pg 6 When an airplane takes-off from a curved- deck it suddenly jumps into free air. The objective is to approximately reach the suitable speed and angle of attack, at the end of the ski- jump, without exactly respecting the airplane lift to weight equilibrium I don't see anything about airf...

Shalav

srin

No idea - don't even know if an EMALS can be be made to work efficiently on a ski-ramp. Theoretically it should be possible. Everything else will have to be tested once (if) the EMALS on ski-jump ever becomes reality.

Shalav

BTW these points from doc2 And the lift increment will be: (Equation) At the end of the ski-jump , corresponding to (Equation) are saying exactly what I initially stated on the previous page. However it was a precise calculation of the AoA hence the slope of the ski-jump combined with the minimum ve...

Shalav

Moving on from blather, my main point still stands.

If an EMALS can be added to a ski-jump, you can get the required velocity and AoA from a shorter take-off run leaving the landing strip free for another waist located EMALS and a pocket sized USN type carrier - amongst other options.

Shalav

Carrier based ski jump Carrier based ski jump 2 Looks like you read only the paragraph headers on page 4 of doc2 we have some details http://www.icas.org/ICAS_ARCHIVE/ICAS2012/PAPERS/167.PDF In the ski-jump, the wind increases the speed and the angle of attack , as shown in Fig. 2. The increase in ...

Shalav

... blah... blah... Have a nice day. err no - when a plane takes off at an angle the AoA is NOT zero. The airflow is STILL parallel to the ground. That sirji is why millions of planes land every year with a nose up attitude - hope you realise it is to increase the AoA to airflow for greater lift wh...

Shalav

1. The ski jump is exactly that, a ski jump, which launches you in the air in a ballistic trajectory and since you spend more time in the air, t he horizontal distance you travel will be higher before you hit the sea surface if you just went straight off the end of the bow . Of course, in the meant...

Shalav

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Shalav

Sankum 50m/sec = 180 kph = ~98 knots 65m/sec = 235 kph = ~120 knots - is that what you say are the rotation velocity for a fully loaded MiG29? Where did you get these numbers from? Vertical velocity in a ski jump has no meaning - AoA and horizontal velocity is what allows for aircraft to t/o from a ...

Shalav

It makes no sense. The cat has enough power to get any aircraft up to flight speed, and you dont need the ski jump. The ski jump takes up parking space. You cant park any aircraft on the curved surface of the deck at the bow. If you have a cat , you dont need a ski jump for any reason. Even if you ...

Shalav

amit wrote:The fuel bunker, in terms of space will probably be able to house another 8-10 aircraft.

Fuel and other liquid consumables are stored in the double hulls of carriers.

Shalav

No dispute EMALS are more dynamic or "dialable" than steam cats. So much the better. The originals observation was directed at the comment that steam cats. cannot be adjusted, and one size fits all.

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