Excellent catchA couple of things can be assessed looking at these images...
For starters, the CH-47F(I) variant is a customized version tailored for the IAF requirement. To that effect, the nose section of the 47F(I) is the version designed to accommodate a FLIR sensor underneath (and I would imagine some additional changes/additions inside the nose as well):
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As can be seen in the above photo, space has been created for mounting of a FLIR gimbal - although installation of the same is pending. Perhaps the particular sensor hasn't been ordered/delivered yet. More than likely it's going to be an Elbit DCoMPASS (or the locally-made version of the same), as already used on various Indian-operated platforms:
This Chinook nose is the same one as used on the US SOCOM's MH-47G/E as well as the Canadian/British Chinooks (at least the particular versions intended for special operations, therefore requiring the FLIR mount):
The regular CH-47F (with no expressed requirement for a stabilized EO mount) has a different nose, as can be seen on the US Army's latest examples:
Although the British managed to tack on a FLIR pod to a few regular-nosed Chinooks (HC7 I believe they're called in UK) as well, but that appears to be an aftermarket modification rather than a purpose-built Special Operations-focused nose section:
It is unclear as of yet if there will be a split in the IAF fleet of Chinooks between the two nose variations or not (all 4 delivered so far have the SOF-type nose). As we have observed, not all IAF Apache AH-64Es will have the Longbow radar, not all IAF C-130J-30s had refueling probes and actively carry FLIR pods, only the ones earmarked for Special Operations do (although in the case of the SuperHerc the 'plumbing' to accommodate a FLIR mount is present on all birds in the fleet).
With refueling probe & FLIR:
Without:
Coming back to the Chinook, there are also significant changes with regard to the Sensor suite. A visual inspection of the front rotor hub (or "crown") on the top picture of this post compared to the Chinooks operated by US and/or other NATO countries is quite telling. It's not strange or unheard of for the sensor fit to be different for different customers (especially among the Chinook stable), but the most interesting is perhaps the mount carried on the fuel tanks toward the rear, in front of the rear landing gear:
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In the absence of any apparent Missile-Approach Warning Systems (MAWS or MWS) on the crown or tailcone (the usual spots for these sensors on American-operated Chinooks, those spaces on the Indian Chinooks seem to be occupied by either some form of active jammer or perhaps an RWR sensor -- the light-colored spots on the lower portions, apparent in the first pic, make it hard to ascertain either way, could be a combined sensor?--, not sure at the moment, perhaps @Arpit can help), I'm led to believe these red-covered electronics on the marked fitment ^^ are in fact the Indian Chinook's MAWS. The selection of a different manufacturer/model may have necessitated the arrangement of a different location for these sensors.
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In the event that the optical sensors on the crown are infact the MAWS all right...then it begs the question what the sensors on the fuel tank are - could it be the Grumman AAQ-24 DIRCM?
@randomradio @Ashwin @Abingdonboy @vstol Jockey @Falcon @Milspec @Gautam @BMD
EDIT: Interestingly enough, the crown & tailcone of the Chinook are among the Indian-manufactured components of the helo (although that doesn't include sensors, only the airframe)...
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Excellent catch
Other points
- Do we know what armaments will be going on these Frames ie Mounted Guns for Side and rear Ramp Gunners?
- Any reason to why the US markings still on the Frame? - 'N282RN'?
- We do know that the Chinook is capable of mounting a Air to Air Refuel Probe - Would we see the same for IAF's Frames?
Good point....Even then, in order to safely refuel helicopters, a turboprop tanker platform will be necessary, like a KC-130. This is because the slowest safe speeds for a jet (like Il-78MKI or A330) and the highest forward speeds of a helo are pretty incompatible for successful refueling. So unless we buy a few KC-130Js (or convert some existing SuperHercs for a tanker role), it would be pointless to equip the Chinooks with a refueling probe
There are conversion kits available i think. With those even a C295 can be used for Refueling.Good point....
I am fairly certain those are MAWS & RWS combined units. There are rear ward looking MAWS/RWS units on the Tail cone as well.In the event that the optical sensors on the crown are infact the MAWS all right
As you mentioned there are red "Remove before flight" covers on the thing. The only parts of a aircraft/helo that gets a red tag/cover are things that maybe damaged due to excessive exposure. Remember how infrared guided missiles also have a nose cover to protect the sensor. So, keeping all that in mind its quite reasonable to assume that its a DIRCM. As to who makes them, I don't know.could it be the Grumman AAQ-24 DIRCM?
Good eyes my friend. I frankly didn't notice.As can be seen in the above photo, space has been created for mounting of a FLIR gimbal - although installation of the same is pending. Perhaps the particular sensor hasn't been ordered/delivered yet. More than likely it's going to be an Elbit DCoMPASS (or the locally-made version of the same), as already used on various Indian-operated platforms
As you mentioned there are red "Remove before flight" covers on the thing. The only parts of a aircraft/helo that gets a red tag/cover are things that maybe damaged due to excessive exposure. Remember how infrared guided missiles also have a nose cover to protect the sensor. So, keeping all that in mind its quite reasonable to assume that its a DIRCM. As to who makes them, I don't know.
Interestingly not all of them seem to have it. If you look at some of the pictures I have posted some of them don't have it. It seems as if the order was like longbow radar on our Apaches.
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Looking through the pic more carefully I have more questions of my own. I have marked them out with arrows, circles and squares. I you could explain to me what these things are and what they do, I would be grateful.
Additionally, why would we cover up the MAWS on the tanks if we don't cover the MAWS on the crown ? Surely "too high up, can't reach them" is not the reason.However, now we're back to square one. If the sensors on the Chinook's fuel tanks are MAWS, then what are the ones on the front & back? They all can't be MAWS...non-Indian Chinooks usually have MAWS in the front & back (where we have those black rectangular strips with a small optical sensor on our examples), then why does our Chinook require additional MAWS fitments on the sides, which are also looking toward the front & back? As you can see from even a cursory glance, the field of views of these sensors appear to have considerable overlapping.
Cooling ?Yellow - That hole appears to be present on all CH-47Fs. Not sure of the purpose but the obvious guess is that its meant to direct airflow somewhere that needs it.
APU ?Blue - An exhaust of some kind. Prolonged usage seems to throw up soot marks around it
Additionally, why would we cover up the MAWS on the tanks if we don't cover the MAWS on the crown ? Surely "too high up, can't reach them" is not the reason.
Cooling ?
APU ?