What is strange? The part rotates and blocks the air from going into the intakes but there are holes in the side of the intakes where air can go in instead and avoiding the part.

Any chance you could provide in-flight picture of the T-50 where “those rotating parts are blocking air intakes”?

But what APU does the Su-35S use then?
It does have a powerfull radar and optical sensor systems as well?

We can already assume that both GTDE-117 remained to spin up the 117S engines and the new APU TA14-130-35 producing AC electric power 115/200V installed somewhere between the engines. There seems to be a large exhaust added on, check pictures below. The question I`m wondering about, was really the Su-34 engine section overfilled with another aggregates when compared to the Su-35, making the tail boom only place to install the new APU? So far it seems…

As i can recall.. the conclusion from that debate was that the Su-34 engine plating coverage was some additional Armour.
In case any CAS mission profile if needed.
Although it is relative light Armouring we are talking about here. Not in the same leauge as Su-25 standard.

The Su-34 engine nacelles have alodined aluminium skin structure which has to be painted with paint(in contrary to titanium alloys on the Su-27 nacelles which were left unpainted). That`s all, no additional armour, where have you read this mate? 😮

Should have corrected my previous statements regarding the new APU installation before, but since this first picture of the new Su-34 top side appeared on the internet, could be the right time to do it now.
Previously I assumed that both GTDE-117 turbine starters and power generators have been removed from the Su-34 and the new more powerfull APU was installed instead.
I was wrong, the GTDE-117 turbine starters remained in order to spin up the Al-31 engines, bcs you can clearly see their exhaust ports in front of the engine nacelles. So far the whole Su-27/30/34/35 family is using the same GTDE-117 installation. Worth mentioning is that the GTDE-117 has an independent regime called “Energouzel” in which when working on the ground generates electric power to feed on-board equipment during functional tests. True is that it is was found insufficient from the start and especially in case of the Su-34 with larger avionics bays with more thirsty equipment installed, requirements for electrical consumption and cooling raised when performing ground tests.
They installed third APU the TA14-130-35 turbine engine in the tail boom which is used to generate electric power only, also feeding new air-conditioning unit inside the fuselage.

This modification enabled them to get rid of an old air-conditioning system consisting among others, of two air to air radiators installed between frame 36-37 with their exhaust nozzles pointed down on both sides of engine nacelles. This is one of major external difference visible excluding the new Su-34 darkgrey/blue camouflage.:)

It’s a weird color for sure under different lighting. Looks almost dark lilac under some conditions.
Will be intersting what colors the next batch comes in at, the same brownish-purple, or a more standard grey.

it is not weird, it is just glossy….;)

As I understand, these figures come from the same source, the manufacturer UOMZ so certainly I assume that they consistently publish them. If 60kg is just the weight of the mono block of 13SM-1 so 200kg cor-relatively is weight of mono block of OLS-52Sh, excluding data processor, etc. Apparently Su-30’s nose is much bigger than Mig-29/-35’s nose so Su-30 can equipment bigger, heavier, more complicated and more functional optronic system (OLSD-52) than Mig-29/-35’s (13SM-1).

Ok, but what about the OLS for the SU-35, weights only 71kg? aint that weird either 😉 Does it mean the OLS for Su-35 cant guide A2G missiles?
http://uomz.ru/eng/index.php?page=products&pid=100175

Those numbers are tricky things…could be you are right too.:D

IMO, the function to guide missile is VERY GOOD & UNIQUE selling point that UOMZ would utilize to advertise and market instead.

Generally the “laser designator” can:

– Have only the ability to measure the distance.

– Or have both abilities to measure the distance and guide missile.

In this case of 13SM-1, apparently it doesn’t have the ability to guide missile and that is the reason UOMZ don’t mention this function in their specification of 13SM-1.

hmm, dont argue with you, but when reading the official UOMZ product leaflet found here http://uomz.ru/download/Katalog_spec_RUS_ENG_web.pdf you will notice that only the OLS-30I for Su-30 familly a/c has the feature mentioned…
illumination of ground targets for aiming of the guided laser seeker missiles;
not mentioned in the newest OLS for SU-35 or Mig-35, ain`t that weird? My understanding is that while you have the ability to measure the distance,then target designation is only a matter of A2G missile weapon implementation into the SUV.

With me, that looks like a base for another optronic system that will be installed in the space left by IFR probe. That should be a FLIR or a laser designator or combination of both FLIR & laser disignator for A-2-G laser guided Ugroza-rockets & missiles.

do not understand, why installing another FLIR or a laser designator system when there already is the 13SM-1 and why especially for the A2G laser guided Ugroza-rocket pod? Is it some kind of future weapon?
http://uomz.ru/eng/index.php?page=products&pid=100178