CCRP release time at low altitude with high drag weapons is wrong?
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Creating a custom stp (for example 99) for targeting something specific often results in CCRP Hud release timer showing wrong numbers (usually very large) although distance is shown correctly.
Observed in ITO 80s campaigns with mk84a and mk82s. For example approaching target at low altitude and 450 knots doesn’t result in hud showing something like 00:30 as countdown time at 15 miles, but instead shows 48:58, and the number is changing with approaching the target. As a result the release cue never comes up.Is this by design due to weapon/speed/altitude or is it a bug?
Will add more info and screenshots tomorrow.
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@depapier How low are we talking about?
I think I’ve noticed it on both CCIP and CCRP but only when going NOE.
Maybe the terrain blocking a straight path causes it to bug out? -
@unkindled 100-1000 feet. I’ve noticed this isn’t tied to whether radar has LOS to stp. I’ll try more tomorrow in different theatres and altitudes.
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Some screenshots with the issue (or limitation by design?). Note, that all three steerpoints aren’t custom, just navigation points.
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Here is a properly cropped screenshot of the problem. Or perhaps this is supposed to be this way?
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You are not flying towards the steerpoint so if you want to be 100% correct it shouldn’t even tell a time since you will never arrive over the steerpoint. The system also doesn’t know what kind of deviation you are taking from the route, so it cannot give you a correct time.
It should however correct itself once you fly towards the point and pass it within a reasonable amount of distance and then the system can give you a correct time if you will actually pass the steerpoint.
It might be possible that the system deconstructs the velocity vector and uses the component that points to the steerpoint to calculate the time. So the higher the offset, the slower the velocity towards the steerpoint the higher the time (but this is my theory, though by looking at your pics this does not seem to be the case)
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I think it’s because of the offset and bank-angle … extrapolating that current flight path, you will just fly a circle around the target, forever. It’s letting you know, after 58 min, you’ll be out of fuel and forced to jettison… <kidding … I think … I also have no idea what it’s computing>
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Had this while dropping AIR bombs. If too low, countdown is wrong and bombs fall very short. Realistic? Don’t know. A few hundred feet above, right on target.
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@depapier You are defiantly using high drag weapons.
Could you tell me which type ? -
@razo said in CCRP release time on custom stp is wrong:
You are not flying towards the steerpoint so if you want to be 100% correct it shouldn’t even tell a time since you will never arrive over the steerpoint. The system also doesn’t know what kind of deviation you are taking from the route, so it cannot give you a correct time.
It should however correct itself once you fly towards the point and pass it within a reasonable amount of distance and then the system can give you a correct time if you will actually pass the steerpoint.
It might be possible that the system deconstructs the velocity vector and uses the component that points to the steerpoint to calculate the time. So the higher the offset, the slower the velocity towards the steerpoint the higher the time (but this is my theory, though by looking at your pics this does not seem to be the case)
@airtex2019 said in CCRP release time on custom stp is wrong:
I think it’s because of the offset and bank-angle … extrapolating that current flight path, you will just fly a circle around the target, forever. It’s letting you know, after 58 min, you’ll be out of fuel and forced to jettison… <kidding … I think … I also have no idea what it’s computing>
The bank angle and offset of course play a role in calculation, but not to such a dramatic extent. You can see this once you overfly or just face away from the steerpoint.
@LorikEolmin said in CCRP release time on custom stp is wrong:
Had this while dropping AIR bombs. If too low, countdown is wrong and bombs fall very short. Realistic? Don’t know. A few hundred feet above, right on target.
yes, precisely that. Although the times I have had the issue to the point of overflying the steerpoint, I could not release the bombs at all, since the marker did not come up, so I switched to CCIP and dropped it like that. But I can never judge properly whether the bombs are short because of my skill or something else, when using CCIP at such low altitude.
@Leech said in CCRP release time at low altitude with high drag weapons is wrong?:
@depapier You are defiantly using high drag weapons.
Could you tell me which type ?I’ve documented the phenomenon in the following three videos.The issue (if that is an issue) occurs only with high drag weapons: mk84a, mk82a, mk82s, blu-107/b. Haven’t seen with anything else. Note that despite the fact that in videos from a KTO TE here the altitude that makes the difference seems to be around 400 feet, in the above examples from ITO its higher than that. In ITO it is possible to arrive at the release point without the bomb release cue appearing due to timer, but I haven’t managed to document that on video. The issue seems to be connected to line of sight? The radar can be on quiet and silent modes, it makes no difference.
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@depapier Found whats happening. MSL is lower that STP elevation
Good catch.
Will investigate -
4.37.2.
Low altitude fast speed CCRP.Mk84 AIR work fine.
BLU-107 fall short. -
@LorikEolmin BLU107 use different ballistic code, isn’t reflected in FCC yet, hence the difference. If you drop low (which you should) difference shouldn’t be that big
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@Tumbler31 said in CCRP release time at low altitude with high drag weapons is wrong?:
@LorikEolmin BLU107 use different ballistic code, isn’t reflected in FCC yet, hence the difference. If you drop low (which you should) difference shouldn’t be that big
100 ft at most.
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@depapier With BLU-107 set the delivery to TAIL, release angle to 0, RP = 6/12, impact spacing = 999ft, Fuse: 1.60 sec, ALT @ 200ft, A-LOW: 100ft, speed 600kts, pickle at least one second before STP. Runway is obliterated. Yer welcome.
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@Kavelenko What do you usually use as the STPT? Middle runway section? Opposite runway threshold from the heading you will be attacking?
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@unkindled Set the threshold of the runway as your stp, the bombs will ripple from that point all the way down the runway, if you can keep it straight. I usually align the runway using the HSI which should be set to the course heading of the runway.
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@depapier said in CCRP release time at low altitude with high drag weapons is wrong?:
Not sure it is wrong per say … CCRP is not really made for LOW alt drop. Telemetry and angle computations are not something perfect for such low atl ingress.
But one thing is 100% sure … HUD color is wrong.