Indian trainer aircraft HJT-36 Sitara taught to do "barrel"

Specialists of the Indian company Hindustan Aeronautics Limited (HAL) have finalized two flight models of the advanced HJT-36 Sitara advanced jet trainer, as a result of which the aircraft will be able to perform complex aerobatic maneuvers, including a "barrel".

In 2019, India resumed the HJT-36 Sitara advanced flight training jet trainer program, which had been halted in 2016 following an aircraft control problem. In particular, it was extremely difficult for the pilot to regain control of the aircraft after performing the barrel roll.

In the course of updating the aircraft, slightly moving the vertical stabilizer back, increased the surface area of ​​the rudder.In addition, small parachutes were installed on the aircraft, with the help of which it would be possible to interrupt the uncontrolled rotation along the longitudinal axis in case of impossibility to restore control.

The modernized aircraft have already performed their first flights, performing one rotation on the port side and on the starboard side, the tests were recognized as successful.

The development of Indian training aircraft was launched in 1997 year as part of the program to reduce the dependence of the Indian armed forces on imported weapons and military equipment. The first flight of the HJT-36 took place in the 2003 year, after which development continued, with varying success, until the 2014 year, when the experts revealed a significant overweight of the aircraft. Having failed to cope with the problem on its own, India turned to several foreign companies to assist in reducing the mass of the aircraft.

In 2016, tests were discontinued, resuming only in 2019. To date, two modified flight models of the aircraft are participating in the tests.

The maximum take-off weight of the aircraft is 5400 kg. The wingspan of the 9,8 meter with the length of the aircraft in the 10,91 m. Engine: 1 × TRD "Saturn" AL-55I. Maximum thrust - 1 × 1760 kgf. The maximum speed is 750 km / h, the practical ceiling is 9000 m. The crew of the 2 person. It has five points for the suspension of weapons.

Comments

[St Petrov]

Hindus are trying. And Ukraine is everything. Flew. Yes, Chief? Selyuki have achieved their pride, so to speak. Turchynov, Avakov and Yaytsenyuk led the wild tribe to success

Good luck to the Indians. Let them buy our engines, but it will not work with planes - the Yak will be assembled from kits - the scheme has been worked out

[Thrifty]

s-t Petrov-do not worry, to crap Russia sponsors will oblige the Independent to buy their aircraft fleet, at the price of the latest machines! Thus, they will kill two birds with one stone - and earn extra money, and the air force will be saved.

[St Petrov]

yes they have everything with money. finita la comedy reached the finish line to success. A professional clown set the budget for a five there.

In addition, small parachutes were installed on the aircraft, with the help of which it will be possible to interrupt the uncontrolled rotation along the longitudinal axis in case of impossibility to restore control.

what is it?

[AVA77]

I understand that the Indians still invented a stop valve for an airplane
I wonder what color it is.

[St Petrov]

maybe something like that? catch the corkscrew and voila
I tried to portray on my knee

[AVA77]

The idea is, of course, interesting, vertical landing. Only at the wingtips, you need to add parachutes so that during landing it does not fall with one wing to the ground and the speed when opening is extinguished almost to zero
And so most likely some kind of small parachutes to shoot, just to stabilize the car and land in the classic way.

[Dreamboat]

Outwardly, this "original Indian aircraft" is very similar to the MIG-AT, only a single engine.

[The eye of the crying]

Quote: s-t Petrov

And Ukraine is everything. Flew. Yes, Chief? Selyuki achieved their pride, so to speak

Why do you think about Ukraine when you read the news about an Indian plane?

[St Petrov]

I always think about this barn. I'm compassionate. Christian.

The ability to show concern for others - selflessly giving evaluative comments to others - is a source of true happiness

What can we say about my neighbors' neighbors, if I even take care of the Indians and wish them happiness

And you, Selyuk, minus me - do it with love. I'm sure of it. This is our brotherly love.

[St Petrov]

oh well, everything, offended those who surrender the tax on the war with the Russians and tolerate it (and someone is happy to deduct from your pigsty) for five years

At least one man would have already organized a strike against the war and the tax on this war with Ukrainians and Ukrainian children from the East of Ukraine - but only a spineless mass remains, which is fighting on the VO forum

Well, it's okay, since you know how to endure so gloriously, then you can read all this from me. Warriors of the information space - offended

PS how is it with the Russians? Winning, clowns? Have you taken the airport already?

[The eye of the crying]

Quote: c-Petrov

Quote: Eye of the Crying

Why do you think about Ukraine when you read the news about an Indian plane?

I always think about this barn.

When Private Ivanov always thought about women, it was understandable, but what are you missing?

Quote: s-t Petrov

And you, Selyuk, minus me - do it with love.

Don't overestimate yourself. And do not overestimate the local minuses either.

[Free wind]

And from what side to drag Ukraine here?

[Thrifty]

So, on the basis of such an aircraft, a hunter for shock drones is needed. He would also have high-quality optics for detecting UAVs, and a 37mm caliber gun, and a group of 4 sides to patrol the sky over the battlefield.

[newcomer]

Here's a pancake with caviar! At first glance_ a copy of MIG AT.

[lucul]

Indian trainer aircraft HJT-36 Sitara taught to do "barrel"

It's five )))
In a couple of years, they will teach how to make Nesterov's loop)))

[Reviews]

Quote: lucul

Indian trainer aircraft HJT-36 Sitara taught to do "barrel"

It's five )))
In a couple of years, they will teach how to make Nesterov's loop)))

This is about spinning tests.

[lucul]

This is about spinning tests.

Uh ...

stopped in 2016 after a problem with the aircraft's controls. In particular, it was extremely difficult for the pilot to regain control of the aircraft after performing the barrel roll.

therefore

In the course of updating the aircraft, slightly moving the vertical stabilizer back, increased the surface area of ​​the rudder.In addition, small parachutes were installed on the aircraft, with the help of which it would be possible to interrupt the uncontrolled rotation along the longitudinal axis in case of impossibility to restore control.

Initially, constructively, after executing the barrel, it almost fell into a tailspin)))

[Reviews]

Quote: lucul

This is about spinning tests.

Uh ...

stopped in 2016 after a problem with the aircraft's controls. In particular, it was extremely difficult for the pilot to regain control of the aircraft after performing the barrel roll.

therefore

In the course of updating the aircraft, slightly moving the vertical stabilizer back, increased the surface area of ​​the rudder.In addition, small parachutes were installed on the aircraft, with the help of which it would be possible to interrupt the uncontrolled rotation along the longitudinal axis in case of impossibility to restore control.

Initially, constructively, after executing the barrel, it almost fell into a tailspin)))

No.

after performing the barrel roll, it was extremely difficult for the pilot to regain control of the aircraft.

This can only apply to a corkscrew. This is not how the barrel works. And I can't imagine how it is possible to fall out of the barrel into a tailspin - it is performed at a decent speed, and falls into a tailspin either when the speed is lost, or when the angle of attack is too high. Both options are not typical for a barrel. Well, if we talk about the pilot's error when performing a roll, then we can say that you can "go into a tailspin" from any mode, even from horizontal flight.
The afftyr obviously confused "spin" with "roll".

[Reviews]

Quote: lucul

Initially, constructively, after executing the barrel, it almost fell into a tailspin)))

Here, I found it. CHTD:

The Hindustan Aeronautics (HAL) HJT-36 Sitara Intermediate Jet Trainer (IJT) has commenced spin testing following extensive work to rectify previous issues with this area of ​​the flight envelope.
“For spin test, HAL redesigned the aircraft by moving the vertical tail aft and extending the rudder surface,” says the company.
"These changes for ensuring a satisfactory spin behavior required extensive redesign of the rear fuselage and the rudder."
Two aircraft have received the changes, and both have undergone flight tests to validate the new configuration. In addition, anti-spin parachutes have been fitted.
During the first spin test flight, the aircraft conducted one spin to the left and one to the right.

© flightglobal

Highlighted by me. "Spin", not "roll". Afftyrya for soap.

[stas Sv]

To be honest - I do not understand what is difficult when performing the "barrel"?
Clearly jambs in management. They also set up parachutes ... Scribe.

[Thrifty]

Stas sv-didn’t want the plane to enter the barrel, most likely due to constructive errors! Now, this problem is solved, but there are still many aerobatics

[stas Sv]

Judging by the article, he was included in it, but the conclusion was difficult. BUT! setting parachutes for this is beyond my understanding ...

[stas Sv]

An-12 also turns the barrel, although the consequences at low altitude are catastrophic ...

[Brylevsky]

They also set up parachutes ... Scribe.

An anti-propeller parachute was installed on the Tu-154 in July 1972, before performing the test program for high angles of attack. During the tests, the plane fell into a flat spin, and only the release of the anti-spin parachute prevented the death of the aircraft and its crew. It was an experienced crew of test pilots who perfectly knew both their business and the aircraft.
The tragedy of the Tu-154 was that this parachute was not installed in any production aircraft, otherwise it could not meet the tactical and technical requirements of a civil aviation aircraft. Not a single operational document, which is communicated to the line pilots, contains not a word about these features of the aircraft and not a word about the fact that it was revealed in flight tests. Not knowing this feature of the aircraft (under certain conditions, "to fall" into a flat spin) led to the death of people in 1985 near the city of Karshi and in 2006 near Donetsk ...

[stas Sv]

Yes, I read an article about it.
But! it's one thing on a passenger liner during tests, and another thing on a combat training station. Whatever one may say, but the Indians do not have a school and specialists! IMHO

[faiver]

Something Indians have not, thank God, a simple aerobatics figure for more than a hundred years, and they are making an airplane that could not do it .... so they will have to learn how to shoot a tank, a submarine will have to be taught to dive and, most importantly, to surface, and etc...

[Reviews]

Quote: faiver

Something Indians have not, thank God, a simple aerobatics figure for more than a hundred years, and they are making an airplane that could not do it .... so they will have to learn how to shoot a tank, a submarine will have to be taught to dive and, most importantly, to surface, and etc...

This is an obvious translation glitch by the author of the article. We are clearly talking about a spin test and the installation of an anti-spin parachute at this time. Afftyr apparently confused "spin" ("rotation", in this case in a spin) with "roll" ("barrel").

[faiver]

oops, so it's not the Indians who do not succeed, thank God?

[Reviews]

Quote: faiver

oops, so it's not the Indians who do not succeed, thank God?

At the author.

[Pavel57]

The engine is, you can revive the MiG-AT.