Radar on the M2K

[Fri13]

Who would want to remove such a feature from old equipment when building new?

 

Not to remove, but disable/un-stabilize.

As it would make possible to scan a large volume in a altitude by rolling a 20-45 degree and do a slow turn while radar sweeps the sky.

 

As now to wait 5 seconds for full sweep pattern before moving the radar slightly vertically makes it just a question what is happening. Like what are the values on left for vertical tilting in first place and then does the pattern restart if you move tilt at all between pattern or doesn't radar just not update it. And how quickly can you tilt radar or in low visibility which way to go when you need to scan up and below when you could do it with sweeping while rolling and turning. Now it is like requiring to use a close combat mode with vertical to do upper part.

 

Otherwise always stabilized one is great and of course logical.

[Fri13]

Sorry but seeing the picture of bottom right in https://www.flightglobal.com/FlightPDFArchive/1983/1983%20-%200550.PDF the cone of radar is in front of the plane, not in parallel with horizon.

 

With this picture I understand that the 2 planes are detected by radar but the plane that fly at the same level it's not detected, I'm wrong?

 

I think it is just the drawing 3D effect done little oddly to visualize the degrees.

[zerO_crash]

Not to remove, but disable/un-stabilize.

As it would make possible to scan a large volume in a altitude by rolling a 20-45 degree and do a slow turn while radar sweeps the sky.

 

As now to wait 5 seconds for full sweep pattern before moving the radar slightly vertically makes it just a question what is happening. Like what are the values on left for vertical tilting in first place and then does the pattern restart if you move tilt at all between pattern or doesn't radar just not update it. And how quickly can you tilt radar or in low visibility which way to go when you need to scan up and below when you could do it with sweeping while rolling and turning. Now it is like requiring to use a close combat mode with vertical to do upper part.

 

Otherwise always stabilized one is great and of course logical.

 

The values for vertical tilting is in 10´s of degrees. 1 -> 10deg, 2 -> 20deg, etc...

 

Radar never restarts, it continues as you tilt, but depending on the bar setting, you will have to realise that at 4 bar lines (12 degrees), it might potentially take it a whole scan pattern before it´s showing you any targets in that zone.

 

You don`t need to worry about how fast radar turns to maintain horizon, it`s negligible. And the horizon stabilisation is very much wanted, always been since first used. Simple reason, It allows you to perform manoeuvres while scanning an area, for instance climb, instead of pointing the radar into the sky. You have vertical tilting for scanning the airspace if need be lower or higher than you are.

 

(It`s a stupid habit people develop with rolling aircraft 360 deg just to try covering altitude difference, your radar moves, use that -> faster -> doesn´t make you lose speed -> is the real way. Wonder what you would have thought IRL if you were to roll every minute just searching for targets, poor you if you found no one after 1h, probably puked a couple of times while doing it)

 

Finally, when chasing targets in vertical, you got these lovely CCM modes, yes, such as bore sight. That`s partly why they are there, in those modes, the radar is selectively stabilised, or not at all.

 

Bore sight - No stabilisation

Horisontal - Horizontal stabilisation + Roll stabilisation

Vertical - No stabilisation

Edited November 10, 2016 by zerO_crash

[jojo]

Sorry but seeing the picture of bottom right in https://www.flightglobal.com/FlightPDFArchive/1983/1983%20-%200550.PDF the cone of radar is in front of the plane, not in parallel with horizon.

 

With this picture I understand that the 2 planes are detected by radar but the plane that fly at the same level it's not detected, I'm wrong?

 

This picture illustrates the RDM radar in look down mode. So the scan zone is tilted down, with 2 planes inside the scan zone.

 

The third plane is outside of scan zone but its radar emission is spotted by SERVAL RWR.

 

These are raw drawing, you can't trust that much the plane's spatial orientation :smilewink: