IAF Chronicles - A side view of whats going on behind the closed doors in New Delhi

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randomradio said:
From what I've heard, the currently operational Spectra has only X band jamming capability. Jamming in other bands are all options, which the IAF seems to have exercised.
@Picdelamirand-oil @halloweene?
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"upgradation of the SPECTRA EW suite to accommodate low-band, medium-band and high-band directional jammer apertures"
Really from what I understand from the quote above it's more the aperture than the band witch must be improved.
More or less I think it is due to the numerous new assets you have to add witch change the rafale RCS.
 
Herciv said:
"upgradation of the SPECTRA EW suite to accommodate low-band, medium-band and high-band directional jammer apertures"
Really from what I understand from the quote above it's more the aperture than the band witch must be improved.
More or less I think it is due to the numerous new assets you have to add witch change the rafale RCS.
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I suppose we will know more if they ever release the frequencies that have been upgraded. Perhaps we will never know.
 
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I'm curious about the OBOGS point. The French air force has flown 10+ hours missions, so I wouldn't think the OBOGS needs to have its capacity increased.
 
A Person said:
I'm curious about the OBOGS point. The French air force has flown 10+ hours missions, so I wouldn't think the OBOGS needs to have its capacity increased.
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Rafale OBOGS generates oxygen onboard only right ? No need for oxygen cylinders ?
 
advaidhya said:
The full form of OBOGS is:
On Board Oxygen Generation System
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Yep I know.. i asked if there could be any variants ..
India might want their own OBOGS in Rafale .. though I doubt that ..
Have we installed our own system in Su 30 mki ?
 
A Person said:
I'm curious about the OBOGS point. The French air force has flown 10+ hours missions, so I wouldn't think the OBOGS needs to have its capacity increased.
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The air pressure over the Himalayas is lower than over plains, so we will need greater pressure for increased air flow into the lungs. My guess.
 
Sathya said:
Yep I know.. i asked if there could be any variants ..
India might want their own OBOGS in Rafale .. though I doubt that ..
Have we installed our own system in Su 30 mki ?
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Rafale has its own OBOGS, we don't need to change that. MKI will get an Indian OBOGS which is being developed for the LCA. M-2000 and Mig-29 will also get the Indian OBOGS.
 
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randomradio said:
The air pressure over the Himalayas is lower than over plains, so we will need greater pressure for increased air flow into the lungs. My guess.
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OBOGS is for oxygen generation at high altitude. Altitude of 10km is the bare minimum standard for OBOGS. SInce Himalayas come within that altitude, there is no special needs for Himalayas i OBOGS. Also, since planes have to sometime travel higher, OBOGS is deigned to be usable upto the maximum ceiling altitude (15km)
 
advaidhya said:
OBOGS is for oxygen generation at high altitude. Altitude of 10km is the bare minimum standard for OBOGS. SInce Himalayas come within that altitude, there is no special needs for Himalayas i OBOGS. Also, since planes have to sometime travel higher, OBOGS is deigned to be usable upto the maximum ceiling altitude (15km)
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and they are very critical component so no need to rush in with half baked ones. F-22 pilot lost his life because of faulty OBOGS.
 
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advaidhya said:
OBOGS is for oxygen generation at high altitude. Altitude of 10km is the bare minimum standard for OBOGS. SInce Himalayas come within that altitude, there is no special needs for Himalayas i OBOGS. Also, since planes have to sometime travel higher, OBOGS is deigned to be usable upto the maximum ceiling altitude (15km)
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OBOGS has nothing to do with altitude, it is used in all altitudes. It replaces oxygen cylinders, saves weight and extends flight time.
 
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randomradio said:
Vstol plans to have OBOGS as well as a small cylinder as backup to avoid exactly that on his MSA.
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Extra cost and weight. Not to forget precious space it would take. Why such design not taken up by most of high end fighters? To have a backup is pretty simple to think off.
 
Arvind said:
Extra cost and weight. Not to forget precious space it would take. Why such design not taken up by most of high end fighters? To have a backup is pretty simple to think off.
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Extra cost, yeah, but not weight, the OBOGS is lighter than oxygen cylinders. And of course, the cylinders are bigger than the OBOGS, so there's space savings also. But what's more important is you can fly for much longer than possible with only oxygen cylinders, which justifies cost. One can only imagine how much oxygen one needs on the MKI with 2 pilots when flying 13 hour missions. The only major hurdle now is engine oil for long duration missions.

All modern jets today have OBOGS.
 
Arvind said:
Extra cost and weight. Not to forget precious space it would take. Why such design not taken up by most of high end fighters? To have a backup is pretty simple to think off.
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MSA being a stealth design will fly extended time at high altitude mostly around 50k feet. It is therefore better to have a back up to OBOGS which can give breathing time of 25-30mins. The net saving in terms of weight and space will be zero compared to bottle fed system but it will be a hassle free system which will provide unlimited range to the aircraft.
 
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vstol Jockey said:
MSA being a stealth design will fly extended time at high altitude mostly around 50k feet. It is therefore better to have a back up to OBOGS which can give breathing time of 25-30mins. The net saving in terms of weight and space will be zero compared to bottle fed system but it will be a hassle free system which will provide unlimited range to the aircraft.
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Sir, do we have any other fighter with both systems onboard?
 
randomradio said:
Extra cost, yeah, but not weight, the OBOGS is lighter than oxygen cylinders. And of course, the cylinders are bigger than the OBOGS, so there's space savings also. But what's more important is you can fly for much longer than possible with only oxygen cylinders, which justifies cost. One can only imagine how much oxygen one needs on the MKI with 2 pilots when flying 13 hour missions. The only major hurdle now is engine oil for long duration missions.

All modern jets today have OBOGS.
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My contention was with having both systems.
 
Arvind said:
Sir, do we have any other fighter with both systems onboard?
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I am not aware of any such fighter. But other than OBOGS every ejection seat has an integral emergency oxygen bottle attached to it. In case of high altitude ejection, the seat stabilising drogue chute is only deployed till such time the seat with pilot descends to barostatic time release unit set altitude. And during this descend the pilot is supplied oxygen from this emergency bottle.
 
vstol Jockey said:
I am not aware of any such fighter. But other than OBOGS every ejection seat has an integral emergency oxygen bottle attached to it. In case of high altitude ejection, the seat stabilising drogue chute is only deployed till such time the seat with pilot descends to barostatic time release unit set altitude. And during this descend the pilot is supplied oxygen from this emergency bottle.
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If I am getting you correctly, pilot has option to manually switch on emergency oxygen supply.

What could be the reason for that F-22 fighter death then? He got late in decision making or he didn't had the one?

One suggestion - why not make the process auto i.e. if sensor sense less than adequate oxygen in cabin, switch to emergency oxygen.
 
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