CCRP Release altitude limit?

[DarkFire]

Having been inspired by watching the Reapers Squadron doing very high altitude LGB releases in one of their Youtube videos (great videos guys :thumbup: ), I decided to try the same thing in my Su-27. I decided I'd climb to 17,000m altitude and release 2 x FAB-500's at maximum speed (turns out to be M2.2 for a standard DCS day with this payload) to see how far away from the target I could drop.

 

It appears that the CCRP bombing mode refuses to calculate a release point at anything over 10,000m altitude. This isn't mentioned on page 130 of the manual which describes CCRP bombing. I know this is ultimately a silly test but I was surprised by the altitude limit.

 

Has anyone else experienced this?

 

Edited to add: couldn't attach the track file as it's too large. Uploaded here: https://1drv.ms/u/s!AnlhZdVeOinTsj7B6aMQq-7uzo-N

Su-27 Supersonic bomb test ACMI.zip

Edited June 8, 2018 by DarkFire

[Ironhand]

Having been inspired by watching the Reapers Squadron doing very high altitude LGB releases in one of their Youtube videos (great videos guys :thumbup: ), I decided to try the same thing in my Su-27. I decided I'd climb to 17,000m altitude and release 2 x FAB-500's at maximum speed (turns out to be M2.2 for a standard DCS day with this payload) to see how far away from the target I could drop.

 

It appears that the CCRP bombing mode refuses to calculate a release point at anything over 10,000m altitude. This isn't mentioned on page 130 of the manual which describes CCRP bombing. I know this is ultimately a silly test but I was surprised by the altitude limit.

 

Has anyone else experienced this?

 

Edited to add: couldn't attach the track file as it's too large. Uploaded here: https://1drv.ms/u/s!AnlhZdVeOinTsj7B6aMQq-7uzo-N

I think you'll find it's a slant range issue rather than an altitude issue per se. While that would still cap your max drop altitude, I just dropped CCRP from 12,500. So it's higher than 10,000.

[DarkFire]

I think you'll find it's a slant range issue rather than an altitude issue per se. While that would still cap your max drop altitude, I just dropped CCRP from 12,500. So it's higher than 10,000.

 

Could well be, thinking about it. When I tried to drop from 17,000 at M2.2 I had a slant range that was probably well in excess of 40 Km.

[Ironhand]

Could well be, thinking about it. When I tried to drop from 17,000 at M2.2 I had a slant range that was probably well in excess of 40 Km.

I think you'll find that you'll reach a speed/altitude combination after which you have to pitch your nose down so severely to designate CCRP that you will actually be unable to do it. The system will slip you into CCIP mode instead.

[DarkFire]

I think you'll find that you'll reach a speed/altitude combination after which you have to pitch your nose down so severely to designate CCRP that you will actually be unable to do it. The system will slip you into CCIP mode instead.

 

Pretty much what happened. I ended up dropping at around M1.2 from 6,000m against the side of a hill that was at most 5 Km from the drop point. Might be an interesting exercise to calculate the maximum slant range permitted for a CCRP drop. I'll have a look at that at some point.