Bharat Rakshak

Shubham

The story claims the Indian Army wants the auto-pilot. One question why was it not required earlier during the development program? I will risk this reply even at the cost of being misunderstood. Firstly, HAL likeness in descending order is IA, IAF and IN. Reason being IA orders are huge and IA is ...

Shubham

One Kiran Trainer aircraft crashes during routine sortie in outskirts of Bengaluru.

Crew reported safe as per news.

https://m.timesofindia.com/city/bengalu ... 672543.cms

Shubham

Requirement of Autopilot in a Helicopter ? Autopilot can be a mandatory requirement or an optional depends on Helicopter static and dynamic stability for the desired speed regime, CG positions, Altitude of operation. What Autopilot/Stabilization Chetak /Cheetah has , Has absolutely no bearing on wha...

Shubham

It looks like if not for the fire, the accident would not be that bad. The heli was some 30-40 feet above ground. ALH has fallen from far higher heights (1000s of feet) and survived. The fuel tanks tech that Mi 17 and what ALH use may have made the difference. Boy, how much I am thinking that this ...

Shubham

1) Folks chetak is reporting the issues that services face with blade vibrations. 2) Chetak please stick to the issue and not make remarks. 3) Raghu, So it's high altitude control authority for the helicopter that needed the larger diameter tail rotors? I have to second what Chetakji is hinting at....

Shubham

How do you think Siachen has been supplied all these years with the MI-26s stationed at Chandigarh assisting in lifting heavy loads to bases in that theatre? There is a 15th.. May 2020 v-clip of an IAF MI-26 operating in the Siachen glacier. So please don't make casual remarks when you don't know t...

Shubham

Just few titbits about HAL vs Services debate and for all u like you can call it hearsay or ...... The first thing that is done to a helicopter received at a unit after total refurbishment is to open it up completely and do a thorough nd detailed servicing !! Of a supposedly brand new heli !! Bcos b...

Shubham

TPSED is contracted to install a few new and latest nav AIDS like ILS (iirc Cat 2)/DME/VOR, corresponding Airfield lighting, better controls in ATC, maybe newer weather instrumentation etc.

Basically it will allow aircraft to operate in slightly more unfavorable weather wrt what is possible today.

Shubham

A difficult rescue mission by Cheetah helicopters to retrieve the stranded ppl of Mi17 helicopter which suffered a force landing in probably bad weather in far flung north Sikkim valley. Elevation reported in excess of 15000 ft. Note the almost whiteout conditions during the rescue attempt. https://...

Shubham

Yesterday morning one Mi-17 V5 made a forced landing in North Sikkim due to some technical issue. All crew safe.

https://bangaloremirror.indiatimes.com/ ... 596499.cms

Shubham

Karan M wrote:Starve these rats out and then when they are tired, send in the NSG.

I think time and surprise is an issue here. The locals gather very quickly and they get on the offensive by stone pelting and breaking any corden. The manpower available at spot would almost never be adequate to handle the mob.

Shubham

January 2015, we had similar incident in which CO of RR unit was martyred iirc trying to get some cornered pigs to surrender.
That time RR was much feared and we got the drift that something big will happen since Tiger has been hit.

I feverishly hope we rain down hell on both sides of LoC.

Shubham

We have to work with the width of land (around 20 km ) that we have . A hypothetical land swap with Bhutan wouldn't help because India-Bhutan border is just of foothills and anyways this border is slightly away from the chocking point. In case of Nepal again our existing border ie north of panitanki...

Shubham

And btw chinook were shipped in thr water ships to gujarat port and Apache were shipped in through aircraft at hindon.

Shubham

I have never really understood why these and the Chinooks are flown to & assembled in Hindon AFB. Why are these choppers not first flown to the B'lore HAL helicopter division, assembled, flight-tested and THEN handed over to the IA & IAF? I guess we dont want people of different nationality...

Shubham

The speed do appears to be too fast,(especially if it had lot of cargo) resulting in high rate of descent just before touchdown.

If rate of descent is too high on touchdown, the tail section will shear off from the joint from where it is connected to cargo compartment.

Shubham

Crash of Mi 17 v5 at Kedarnath. All occupants reported to be safe. One person was killed and three others injured when an Indian Air Force (IAF) cargo helicopter caught fire while landing in Uttarakhand's Kedarnath today, reported ANI. The MI-17 helicopter reportedly caught fire after it hit an iron...

Shubham

How a failed Artouste 3 B engine, took away two lives. http://www.bharat-rakshak.com/IAF/Database/22947 On 11 April 2007, Squadron Leader Basu was detailed for an air logistic sortie to Amar helipad located on the Siachen Glacier, as the leader in two aircraft formation. Flying over this vast frozen...

Shubham

Believe what you want !! but more then enough cheetah pilots have sacrificed their lives to failed engines. I am willing to believe this but your word is not enough. I have been following flight accidents for decades and while all sorts of reports exist - please point me to engine failure as one of...

Shubham

Reality - a twin engine helicopter which is loaded to single engine OGE weight will NOT CRASH AT ALL ( removing cases when helicopter has high rate of descent and low terrain clearance ; while coming for landing. This case can be avoided if pilot is careful) when one of its engine fails. The detrim...

Shubham

That is incorrect sir. OEI flight ceiling will always be lower than service flight ceiling. I have forgotten the number for Dhruv, but typically it is about 75% or so for twin engine helis. If you are flying over territory which is higher than your OEI ceiling, you will crash. There are no two ways...

Shubham

But a twin engine helicopter in the Himalayas - at the edge is its performance envelop will crash just as disastrously as a single engine because the air is so thin that even maximum power on two engines is barely enough and there is no forward movement and wing lift available. And they don't have ...

Shubham

Read online that CO of 114 HU stating that they have lost 14 pilots in operations. Even if considering a few to be human error, the rest is a very high figure of casualty as compared to Russian fleet. I will make an unsubstanted statement that had Su 30 been a single engine fighter, it would have r...

Shubham

Shubham, Although, there is security in redundancy, modern aircraft engines are incredibly robust. Do the Chetaks & Cheetahs have a worse safety record than let's say the Dhruvs and Mi-17s? How about the Mirages over Mig-29s or Jaguars? Read online that CO of 114 HU stating that they have lost ...

Shubham

Some of the posters are having the views that ALH is inefficient wrt Cheetah class helicopters, but the usage of a single engine helicopter is nothing short of senseless and gross disregard of various risks which need not be taken in 99.99 per cases. Flying a single engine at high altitudes is just...

Shubham

Some of the posters are having the views that ALH is inefficient wrt Cheetah class helicopters, but the usage of a single engine helicopter is nothing short of senseless and gross disregard of various risks which need not be taken in 99.99 per cases. Flying a single engine at high altitudes is just ...

Shubham

I had few doubts 1.Can ALH fly with single engine ??? 2.Is it O.k to take a 500kg penalty ??? 1. I assume that you mean that in case one engine fails or the pilot is Forced to switch off one engine, can heli fly ? . It depends on the performance class of the helicopter and loading. I believe that A...

Shubham

To me this sounds like a death wish for a part of our army that are supplied by helicopters No sir. They will be supplied through ALHs. At the moment, the rate at which “talks” are “progressing”, I can’t see how KA-226 is going to beat the LUH in terms of time to production. On top of that the elec...

Shubham

I have a question about practical interpretation of Angle of Attack (AoA) of an aircraft. If I refer to any aerodynamics book, AoA is defined as the angle between the chord line of the airfoil (Wing) section and the relative wind flow direction as shown below. http://code7700.com/images/airfoil_ter...

Shubham

I have seen different coloured jumpsuits in IAF - orange, green, dark blue, etc. Can anyone tell me what each colour represents? Orange provides good contrast so it preferred in snow bound areas and sort of necessary in case of sea flying. Green is the standard flame retardant one, used by all airc...

Shubham

The link of citation posted above is http://pib.nic.in/newsite/PrintRelease.aspx?relid=175900 One citation for Anti Naxal operation. http://pib.nic.in/PressReleaseIframePage.aspx?PRID=1517887 In Jun 2017, the Chhattisgarh Police and CRPF had launched "Operation Prahar", a major joint opera...

Shubham

A snippet of information about our high altitude helicopter operations can be found in this citation of gallantry award announced this Republic Day. President Confers Vayu Sena Medal (Gallantry) to Wing Commander Anshul Saxena Flying (Pilot) On Saturday, 11 Mar 17 at 0630 h the Unit of Wing Commande...

Shubham

Regarding recent Mi17 accident in arunachal, a video has surfaced on net https://www.ndtv.com/india-news/video-said-to-show-moments-of-arunachal-air-force-helicopter-crash-that-killed-7-military-personnel-1768464?amp=1&akamai-rum=off The remarks of CAS were indeed correct, the tail rotor separat...

Shubham

as when chopper transitions from hover to forward motion the blade on 3'o clock will produce even more lift as it is cutting against the incoming wind whereas the blade at 9'o clock is actually moving backwards (again applies to clockwise main rotor). Actually it is opposite, for clockwise rotor in...

Shubham

Agreed. I will also ask a heli pilot friend of mine for his thoughts as well. He flew helis where the rotors spun the other way. But, I am pretty sure he will agree with us. Also, no "ji" for me please. Me too nanha mujaheed only. While I may not be the friend you wanted to ask :) , this ...

Shubham

1. The cliff restricts the movement of the air from the left and hence the airflow at 9'o clock is both faster and at higher effective AoA. It should be lower AoA Thank you Indranil ji for indulging me, but no saar for this nanha mujahid. Generally I can't disagree with you for any point. Recircula...

Shubham

My guess, you crash into the wall, because of the suction effect that will be created by the air flowing faster between the helicopter and the wall compared to the other side due to Bernouli effect. My guess is that the rotor has to be tilted right to counter that. Is the answer of this question no...

Shubham

The other one Q. How is motion of helicopter effected? Is it differential pitch, tilt of rotor disc? What happens to the fuselage? Ans. The final reason why helicopter moves in 2D plane is due to rotor disc tilting in that direction ( for forward motion , rotor disc is lowest at 12 o clock point) a...

Shubham

The other one Q. How is motion of helicopter effected? Is it differential pitch, tilt of rotor disc? What happens to the fuselage? Ans. The final reason why helicopter moves in 2D plane is due to rotor disc tilting in that direction ( for forward motion , rotor disc is lowest at 12 o clock point) an...

Shubham

Let me take a bite at this. DeeJee ji question Q. what happens when you hover a helicopter with big wall on your left ? Ans. Assuming helicopter is a clockwise rotating main rotors like Russian/french (Chetak), the helicopter will just move forward. No sidewards motion towards or away from the wall....

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