KH-66 GROM Not locking or following beam

Hi guys,

I've tried every tutorial and manual out there to try get this to work.

Never get the pipper to lock and never get the missile to follow the beam.

I've looked at:

and page 95 on: https://www.mudspike.com/wp-content/uploads/guides/DCS%20MiG-21bis%20Guide.pdf

Zero luck in a lock.

Any hints?

Thanks :thumbup:

I have the same problem ? It worked in the past ???

Not sure if this is actually a bug, or if the fix was finally implemented.

The radar should not be able to enter a locked state in fixed-beam mode. You have to fly it on by keeping the pipper on the target now, as you would need to in a real MiG (albeit one with an RP-21 radar, as the 21bis' RP-22 isn't actually compatible with the Grom at all, but was handwaved to give us more toys to play with). The ability to lock the beam before was not a realistic feature, and could actually be exploited to act as a boresight lock for air-to-air use as well.

On a real bis your fixed beam is for slant ranging during A/G attacks.

Not sure if this is actually a bug, or if the fix was finally implemented.

 

The radar should not be able to enter a locked state in fixed-beam mode. You have to fly it on by keeping the pipper on the target now, as you would need to in a real MiG (albeit one with an RP-21 radar, as the 21bis' RP-22 isn't actually compatible with the Grom at all, but was handwaved to give us more toys to play with). The ability to lock the beam before was not a realistic feature, and could actually be exploited to act as a boresight lock for air-to-air use as well.

 

On a real bis your fixed beam is for slant ranging during A/G attacks.

For me it is definitely not locking on ground, never tried KH-66. I didn’t know the locking on an air target with fixed beam was not real though, that used to be my go to, but I can live with it if it’s for a good reason:)

Not sure if this is actually a bug, or if the fix was finally implemented.

 

The radar should not be able to enter a locked state in fixed-beam mode. You have to fly it on by keeping the pipper on the target now, as you would need to in a real MiG (albeit one with an RP-21 radar, as the 21bis' RP-22 isn't actually compatible with the Grom at all, but was handwaved to give us more toys to play with). The ability to lock the beam before was not a realistic feature, and could actually be exploited to act as a boresight lock for air-to-air use as well.

 

On a real bis your fixed beam is for slant ranging during A/G attacks.

On the other hand "in firing of the gun and launching of rockets at ground targets...in the GYRO, AUTO mode:...© check to ensure the radar range-finder has locked onto the target, referring to illumination of the LOCK-ON indicator light;"

I'm guessing that the radar doesn't lock onto a point of the ground angularly but instead is body-fixed to the automatic pipper location or is gyroscopically free to maintain the same spatial angle. It does say the lock on light should come on for rocket attacks with the RP-22 radar. But perhaps it's best to replicate the RP-21 since that's what any actual Kh-66 operator would have to deal with.

...check to ensure the radar range-finder has locked onto the target, referring to illumination of the LOCK-ON indicator light.

I interpreted this as the radar waiting for a solid, steady signal for accurate ranging.

Yeah who knows what the light means. I figure it's bracketing the ground return distance along some known LOS. It's certainly not the fixed ground point track like the DCS module used to portray.

For me it is definitely not locking on ground, never tried KH-66. I didn’t know the locking on an air target with fixed beam was not real though, that used to be my go to, but I can live with it if it’s for a good reason:)

I actually flew the module for a full year and a half before I found out about it (by being told) :lol: It was like discovering a whole new plane. R-3R as a dogfight missile was hilarious.

I actually flew the module for a full year and a half before I found out about it (by being told) :lol: It was like discovering a whole new plane. R-3R as a dogfight missile was hilarious.

It's like playing darts at 1100km/h. And the dartboard is on a wind turbine.

Just tested the kh-66, seems that it isn't going for the radar beam at all. It just launches and goes into the ground. I guess we need to know the new procedure.

Strange. Seems to work for me in a/g mode. Is that what you're trying to do or a/a? I see one thing missing in mudspike manual. The missile select switch next to air/ground should be set to nuetral.

The AA missile type preference switch has nothing to do with delivery of an AG guided rocket. You don't even have to be in AG although you should really be in whatever state is normally appropriate to deliver S-24 rockets. As long as the radar is in fixed beam mode (locked or unlocked) and the Grom comes off the rail it will guide. You can even use the emergency launch button under the red cap on the dashboard.

I recommend setting the AUTO/MAN sight switch to MAN and setting the angles knob so that the movable pipper overlays the lower standby pipper X exactly. Alternatively you can use the lower X on the standby reticle. Then you will have a radar boresight reference for delivery. If the switch in AUTO the moveable pipper will fix to the zero degree position which is not the fixed beam radar boresight.

@cthulhu68

Looks like you are on stable release? The issue we are talking about came with the latest updates for open beta.

No. Im on OB. Have you guys checked that "lock" command is working. In controls list does it go to lock command when you press it. In cockpit you can see the lock button move on flight stick ( just below trim).

No. Im on OB. Have you guys checked that "lock" command is working. In controls list does it go to lock command when you press it. In cockpit you can see the lock button move on flight stick ( just below trim).

You have realistic ASP pipper enabled?

You have realistic ASP pipper enabled?

Not sure what you mean. ASP settings= LNC, Shoot, Auto, Gyro

There are various options under the module specific special options (gear icon main menu)

Oh, so "realistic ASP" is the change mentioned on the first page? I guess its working then. With realistic off you can lock, with it on you cant. I usually used Auto mode and it seemed to work for giuded delivery but it doesn't work with realistic ASP. Setting it up manually as mentioned above worked well.

I do not find this to be true. I have realistic pipper set to on and I lock the ground just fine. As far as I know the only thing that this option affects is whether the pipper floats around when AA missiles lock on to airborne targets or not.

Can you record a track with the realistic setting not working? I'm curious.

Locking in realistic mode didn't seem to be working because a) the pipper no longer stays on your target like in non real mode, and b) in auto mode the pipper marks wrong spot. Like guided delivery you have to use manual mode and lower pipper.

So those are the differences when using realistic ASP. Use Manual mode only and the pipper doesn't stay on target when you lock.

Indication of lock is the green light on the ASP below the scale. The radar also follows the ground despite pitch changes (see length of fixed beam line). The pipper should not change position to reflect lock.

Just the got the GROM working again by activating the "realistic ASP pipper" AND(!) "experimental features" under special options. Now the pipper won't lock onto the ground, but the GROM will go were you locked the radar beam. For targeting i use those small crosses of the fix net HUD.

Just the got the GROM working again by activating the "realistic ASP pipper" AND(!) "experimental features" under special options. Now the pipper won't lock onto the ground, but the GROM will go were you locked the radar beam. For targeting i use those small crosses of the fix net HUD.

Experimental features only affects realistic SPO-10 simulation

Maybe i just needed to disable and enable the realistic pipper to make the missile work again. More important, i can deliver the GROM onto targets again.

Having the same issue. Used the Groms for 6 months. No issue. After patch Radar beam won’t lock and missle won’t follow the beam regardless. Just an unguided rocket. Although I have not tried fiddling with popper realism and what not