DRDO, PSU and Private Defence Sector News

[mist_consecutive]

well.....

Not all heros wear capes, some don't wear pants.

 

[NoobWannaLearn]

Credits to marics01 for finding these

 

[Smoothbore125mm]

Credits to marics01 for finding these

View attachment 252169

View attachment 252170

for reference

rotary engines are really a class apart 65 hp from a 32 kg engine !

 

[Smoothbore125mm]

 

[Lonewolf]

for reference
View attachment 252171View attachment 252172
rotary engines are really a class apart 65 hp from a 32 kg engine !

Turboprops have power to weight ratio in range of 3+, same for IC engine, turbofan are much more efficient but that's totally different

 

[SwordOfDarkness]

Turboprops have power to weight ratio in range of 3+, same for IC engine, turbofan are much more efficient but that's totally different

IC engine?

 

[Lonewolf]

IC engine?

Internal combustion, your basic piston in shell assembly you see typically

 

[SwordOfDarkness]

Internal combustion, your basic piston in shell assembly you see typically

Ahhk. I was confused cause all the engines you listed are IC engines only, just different types.

Though do you have any figures for piston engine power-to-weight? Im not sure it matches up with what I know even for larger engines (eg light aircraft engines, with around 1.3 instead of 3 for one I could find.). I assume you are saying horsepower to weight here.

 

[Blademaster]

Is that in 105 mm or 155 mm shells or both? Makes a big difference.

 

[Lonewolf]

Ahhk. I was confused cause all the engines you listed are IC engines only, just different types.

Though do you have any figures for piston engine power-to-weight? Im not sure it matches up with what I know even for larger engines (eg light aircraft engines, with around 1.3 instead of 3 for one I could find.). I assume you are saying horsepower to weight here.

Poster quoted in HP so that's the unit i used

 

[NutCracker]

Turboprops have power to weight ratio in range of 3+, same for IC engine, turbofan are much more efficient but that's totally different

I'm searching for Rotax ones , used by Byrakther and Tapas etc. 3 is way too much, unheard of.

" The 915 iS’s power-to-weight ratio is 0.72 HP/lb. while the 912 iS is 0.58 HP/lb. Looking at other engines in the Rotax line, the stalwart 912 ULS has a power-to-weight ratio of 0.80 HP/lb., using the Rotax dry weight data. The turbocharged 914, with its old-school carburetion, tops the line at 0.82 HP/lb. "

Rotax 915 iS: Incremental Power Boost - Aviation Consumer

Aft of the firewall, a new Cirrus SR22 is the epitome of the technologically advanced aircraft. But the front end of the thing is pretty much frozen in the mid-20th century: old-school mechanical fuel injection, World War II magnetos, manual mixture control. This is so because buyers have wanted...

www.aviationconsumer.com

 

[NutCracker]

I'm searching for Rotax ones , used by Byrakther and Tapas etc. 3 is way too much, unheard of.

" The 915 iS’s power-to-weight ratio is 0.72 HP/lb. while the 912 iS is 0.58 HP/lb. Looking at other engines in the Rotax line, the stalwart 912 ULS has a power-to-weight ratio of 0.80 HP/lb., using the Rotax dry weight data. The turbocharged 914, with its old-school carburetion, tops the line at 0.82 HP/lb. "

Rotax 915 iS: Incremental Power Boost - Aviation Consumer

Aft of the firewall, a new Cirrus SR22 is the epitome of the technologically advanced aircraft. But the front end of the thing is pretty much frozen in the mid-20th century: old-school mechanical fuel injection, World War II magnetos, manual mixture control. This is so because buyers have wanted...

www.aviationconsumer.com

It translates to less than 2HP/kg

 

[Smoothbore125mm]

Is that in 105 mm or 155 mm shells or both? Makes a big difference.

Both i would assume we still dont have 155 mm in large number 105 outnumbers the 155 mm for now

 

[Blood+]

Is that in 105 mm or 155 mm shells or both? Makes a big difference.

Almost certainly a combined figure and that's perfectly fine.

 

[Smoothbore125mm]

ATMANIRBHAR

 

[NoobWannaLearn]

 

[Chinmoy]

even if we assume there are such ideas out there, those can be taken seriously only when they come from established players (DPSU + private) who are already part of the industry. otherwise it will end up looking like that fellow who is showing off his bomber uav past week.

solar industries bhargavastra falls in the innovation category you are thinking of?

View attachment 252124

I'd like to differ on the DPSU+Private player here. When you bring in PSU, you are bringing in public tax money and CAG along with. The moment they are in, there is bound to be unwanted audit and parliamentary discussion resulting in the same old mess we are in as of now.
DPSU involvement should be upto the extent of providing their manufacturing and testing facility to bring down the development cost.

Yes. Bhargavastra do fall under that category. IA has not yet put forward any requirement for such a system. But EEL has taken the initiative in this regard. So basically its one of a kind system out there and they are infact creating demand for this instead of waiting for IA to come up and ask for such a system.

 

[Chinmoy]

This could be done by proactively getting the design ready and presenting the product to user for trials before user could come up with the requirement.

who would give money for this trial product and if user shoots it down or gives sky high requirements money goes down the drain . honestly seem like hopeless case

Hopeless is the case when you think that what ever jumble you put up, have to get accepted.

Let me give you a layman example. What if you want to setup a grocery store in your locality? Would you go around your locality with stamp paper taking signoff on it that, all in your locality are bound to buy grocery from your store after it opens? Or would you try to promote your business and invest on it for a year before seeking profit out of it?

Now coming to practical defense situation. Heard about Boston Dynamics? The robotic dog Spot got rejected by Marines for whom it was designed. In India, they would have gaslighted the issue. But what have they done? They have taken feedback from user and came up with Mk3 recently. Even today they are awaiting order, but instead of crying foul, they are working on further improvement and culminating the improvement seek.

But in our case, we want money from user to design and develop. Then we want money for prototype manufacturing. Then we want money for delivery too. Among this, would cry foul for any design change sought by user or at best would take our own sweet term to do it.

 

[Chinmoy]

Namica already has anti-air ability. It may not have vertical shooting capability like VSHORADS but it can lock onto helicopters and other low flying objects using its IIR seekers. For that matter, most ATGMs of 3+gen having IIR seekers have anti-air capabilities.

Bas kar do... Aaj ke liye itna kaafi hain.

 

[Chinmoy]

I usually avoid abusing anyone but BC in horny uncles ka kuch karo please

This time the target was in his late 20s/early 30s and a bachelor.