S-70 "Okhotnik" UCAV

The aircraft the S-70 operates with don't need to "fly" the S-70, they just need to set up a link to swap information... the Su-35 could use its wing mounted L band AESA antenna to communicate in broadband to send enormous volumes of information if needed and having a similar antenna on the leading edge of the S-70s wing means it can also hunt stealthy targets and pass on target data too.

The information they send to each other from IRST and IIR sensors and radar will not be too much different from the same data coming from the S-70, or going to HQ.

GarryB wrote: having a similar antenna on the leading edge of the S-70s wing means it can also hunt stealthy targets and pass on target data too.

What are the sources stating the S-70 has an L band antenna in each of the wing leading edges?

You appear to be misreading what I wrote.

I didn't say S-70 had the leading edge AESA radar antenna that the Su-35 and Su-57 have.

I essentially said IF the Su-35 and Su-57 could use their L band AESA wing mounted radar antenna as an L band datalink (the same frequency area that HATO Link 12 datalink communications operate at so it should be suitable) then the S-70 could use the same existing equipment to communicate back.

Which actually reminds me that on the Su-57 thread it mentions new high frequency communication and navigation equipment... well that might be something that operates through the higher frequency nose mounted AESA radar in the Ku and Ka band which would be compatible with any similar AESA on the S-70.

It also mentions surface based antenna with 360 degree coverage which suggests to me that the new radar/communication antenna is actually the skin of the aircraft, so they could use the same skin on the S-70 for the same communication and radar coverage.

GarryB wrote:
I essentially said IF the Su-35 and Su-57 could use their L band AESA wing mounted radar antenna as an L band datalink (the same frequency area that HATO Link 12 datalink communications operate at so it should be suitable) then the S-70 could use the same existing equipment to communicate back.

Are you saying the S-70 doesn't need an L band AESA to communicate back with the L band AESAs of the Su-35/Su-57?

@BenVaserlan
Actually, they would need just a radio or a data link operating at the same frequency of a L band radar for this but I think it's just logical to put an L-band radar instead. S-70 wing are perfectly capable to host it and could be used as a way for get an early warning against stealth planes allowing the Flanker to begin the fine search and tracking phase from an advantage position.

marcellogo wrote:@BenVaserlan
S-70 wing are perfectly capable to host it

And given the the S-70 has a longer wing leading edge than the Su-57, it could likely host a larger L-band array.

Are you saying the S-70 doesn't need an L band AESA to communicate back with the L band AESAs of the Su-35/Su-57?

As far as I know the L band wing mounted AESAs of the 35 and 57 are used for detecting stealth targets. I have seen a lot of speculation that it operates in the same frequency range as the HATO Link 12 datalink band which it might use to help detect HATO communication between aircraft and to and from various weapons they might use that use datalinks for communication, but I have not seen any Russian sources confirm such things.

As an AESA it would be able to transmit and receive signals, though also as an array of TR modules it should also be able to communicate over fairly significant distances, so things like controlling drones deep in enemy territory might become and option too.

For the S-70 it does not need something as big as an L band AESA array just for datalink communications, though I would think the ability to scan for stealthy targets at ranges conventional targets would be detected would be useful enough to install them.

Just speculation.

S-70 wing are perfectly capable to host it and could be used as a way for get an early warning against stealth planes allowing the Flanker to begin the fine search and tracking phase from an advantage position.

Another factor would be if you have a flight of four Su-57s or Su-35s and each Su-57/Su-35 has two S-70 wingmen operating with them then you have four large fighters with AESA arrays to detect stealth targets, but also 8 drones with similar arrays and all 12 platforms can be used together where one or two aircraft might transmit a scan signal with all 12 collecting the reflections and returns and processing them based on their location... L band is used because it is not effected by aircraft shaping so the reflections are not redirected in other directions like higher frequency signals are.

If the S-70 has these arrays then using their stealth shaping means they could fly high and much closer to enemy territory while the non stealthy Su-35s scan with their L band arrays for targets... being much closer the S-70 arrays will pick up targets even further away than the Flankers might simply because they will be closer.

And given the the S-70 has a longer wing leading edge than the Su-57, it could likely host a larger L-band array.

I always thought a flying wing design with volume for internal space for weapons and fuel and avionics would lead to a quite thick profile while where the internal space transitions to the leading edge and trailing edge of the wing there is going to be space at the front and across the entire rear of the wing surface you could put a radar antenna array, so a straight rear antenna the full width of the aircraft with gaps for the engine exhausts of course, though if they are above the wing surface the antenna could be complete, and across the front of the wing leading edge perhaps swept back 40-50 degrees... those three AESA radar arrays should give almost 360 degree coverage without physically needing to turn.

Perhaps even a different shape with a flat front and a more strongly swept wing area and a flat rear for four sides giving complete 360 degree coverage without an external radar array like the A-100.

For the bomber design inside that could be fuel and bombs and engines and people and avionics, but for an inflight refuelling plane it could remove the weapons and just have fuel, and for an AWACS platform just fuel for endurance.

Thank you for the elaboration.

Just a question, has there ever been information as to how many S-70s the VKS intends to order?