LCA TEJAS MK1 & MK1A: News and Discussion

[BlackViking]

I don't care.... Did you get the reasoning? I tried to explain as best as I could.

It's fine I guess, we can use that 50% figure as an average of sorts. We know that average of any data is never an optimal parameter to look at but it gives a rough idea.

 

[Bleh]

It's fine I guess, we can use that 50% figure as an average of sorts. We know that average of any data is never an optimal parameter to look at but it gives a rough idea.

Nobody is sich calculation tho... It's not official. Each & every T/W value is a simple division considering full fuel, not a differential calculus of the fuel weight charging with time.

He came up with that for his video.

 

[Chinmoy]

Tejas payload.

 

[Bleh]

View attachment 76055View attachment 76056

Tejas payload.

I initially thought that was MWF belly, but no.

 

[HariPrasad-1]

Yup I also don't get the reasoning behind the 50% figure but I will leave it up to @HariPrasad-1 if he can throw some light to it.

Plane looses the weigh of fuel as soon as it starts. So Weight continuously decreases. By the time it lands back after mission, fuel is almost empty (In many case). Therefore T/W ratio is a changing parameter with passage of time. Therefore when we talk to T/W ratio in various scenario, it is a practice to consider 50% fuel fraction. While comparing combat T/W

 

[Cactus09]

I initially thought that was MWF belly, but no.

Can you provide more info on the payload? This is the first time I am seeing the Cats Hunter and other stuff.

 

[Bleh]

Can you provide more info on the payload? This is the first time I am seeing the Cats Hunter and other stuff.

I don't know much either.

You can tell that one of the cruise missiles have active-radar guidance & another has TV guidance.

That drag-optimised fuel tank have been altered to carry swarm drones, maybe... Looks same.

 

[Shekhar Singh]

Dude you can calculate yourself...
(Military wet thrust in kN ×100) ÷ (Empty weight + Internal fuel weight in Kg) .

Tejas Mark1/A:
(85kN × 100) ÷ (6500kg + 2500kg) = 8500/9000 = 0.945

Tejas Mark2 (without EPE):
(95kN × 100) ÷ (7500kg + 3300kg) = 9500/10800 = 0.88

Tejas Mark2 (with EPE/RR engine):
(105kN × 100) ÷ (7500kg + 3300kg) = 10500/10800 = 0.97

Other than T/W ratio, aerodynamics matters for acceleration or rate of climb & canards or FCS matter for taste of turns.

Few corrections,
Tejas MK1A empty weight is expected to be reduced to 6000kg.
EPE wet thrust=116kn
As Per article in DDR by Nilesh Rane and Indraneel Empty weight of MK2 is 7040 kg.

Now do your calculations once again.

 

[Cactus09]

I don't know much either.
View attachment 76095
You can tell that one of the cruise missiles have active-radar guidance & another has TV guidance.

That drag-optimised fuel tank have been altered to carry swarm drones, maybe... Looks same.

Yes I can see that. But any more info on them? Like specifications and development time frame?

 

[Bleh]

Yes I can see that. But any more info on them? Like specifications and development time frame?

Sprry no. @porky_kicker might know.

Few corrections,
Tejas MK1A empty weight is expected to be reduced to 6000kg.
EPE wet thrust=116kn
As Per article in DDR by Nilesh Rane and Indraneel Empty weight of MK2 is 7040 kg.

Now do your calculations once again.

Old or uncornfirmed news. EPE doesn't exist, so I used the class designation of 110kN... My mark2 weight is from AI19 official placard... & apparently the weight reduction claim was never made by ADA or HAL.

I had those numbers verified.

 

[Killbot]

Gentlemen we will have our own Indigenous Loyal Wingman ready soon

View attachment 75948

Isn't the first flight scheduled in 2022 (according to the brochure posted a few months ago)? Things are pretty quiet, considering.. Not much news till now.

@Bleh @porky_kicker @warriorextreme etc

 

[FalconZero]

Dude you can calculate yourself...
(Military wet thrust in kN ×100) ÷ (Empty weight + Internal fuel weight in Kg) .

Tejas Mark1/A:
(85kN × 100) ÷ (6500kg + 2500kg) = 8500/9000 = 0.945

Tejas Mark2 (without EPE):
(95kN × 100) ÷ (7500kg + 3300kg) = 9500/10800 = 0.88

Tejas Mark2 (with EPE/RR engine):
(105kN × 100) ÷ (7500kg + 3300kg) = 10500/10800 = 0.97

Other than T/W ratio, aerodynamics matters for acceleration or rate of climb & canards or FCS matter for taste of turns.

OT but does fuel probe affect the rcs of aircrafts? Like drastically affect the rcs like the one on tejas mk1a which are non-retractable.

 

[warriorextreme]

Isn't the first flight scheduled in 2022 (according to the brochure posted a few months ago)? Things are pretty quiet, considering.. Not much news till now.

@Bleh @porky_kicker @warriorextreme etc

HAL has been very aggressive with proposing dates recently. I love the confidence. I am more optimistic after watching Anantha Krishnan sir's video interviews of our young scientists.

 

[Killbot]

HAL has been very aggressive with proposing dates recently. I love the confidence. I am more optimistic after watching Anantha Krishnan sir's video interviews of our young scientists.

But is it achievable?

 

[FalconSlayers]

HAL has been very aggressive with proposing dates recently. I love the confidence. I am more optimistic after watching Anantha Krishnan sir's video interviews of our young scientists.

Because the CATS program they are doing is with a Tie-up with Indian Defence Private Company named
NS.

 

[Spitfire9]

Tejas Mk1 requires a lot of ballast in the nose, as far as I remember, for reasons of balance. I presume that Mk1A benefits from a corrected CofG position, dispensing with the need for balance weight to be added. I wonder, though, how the weight of an EASA compares with the Elta system fitted to Mk1. Anyone have any ideas, please?

 

[Bleh]

 

[Cactus09]

@Bleh @porky_kicker found something. Is this legit?

 

[Bleh]

 

[Lonewolf]

@Bleh @porky_kicker found something. Is this legit?

View attachment 76182

View attachment 76183

Believing in idrw article take it with a pinch of salt