[EVALUATING] ASP range information when attacking ground targets

[lmp]

I just did some tests and I noticed the ASP is getting ranging information even when the radar is off (well, on standby, I didn't try fully off). Is this correct? I did my tests high in the mountains - that would exclude the barometric altimeter - with dive angles exceeding the 20 degree limit of the radar altimeter. If I'm correct that would leave the radar as the only possible source of range, but it was off. Can anyone confirm my finding and/or explain what's happening?

Edited March 12, 2015 by Cobra847

[Flagrum]

When I flew in the mountains, with the bombing pipper active, I had the impression that the pipper was moving according to the current height over ground, i.e according to the radar altimeter. The pipper was moving upwards when I overflew a mountain peak although the pipper was pointing somewhere else high above a deep valley.

[lmp]

Yeah, I tried that too. When I dived towards the peak of the Elbrus I didn't see the range needle move until I was over to summit (and now aiming behind the mountain). I got the same result whether the RP-22 was on or off. So it does look like the ranging data comes from the radar altimeter. But then there's the 20 degrees pitch limit mentioned in the manual? I'm pretty sure I was steeper...

[lmp]

Did some more tests and I have two conclusions:

 

1) Turning off the RV19 radio altimeter switch doesn't affect the operation of the ASP - you still get range in the same conditions.

 

2) I got good range with the radar off and diving at 50 degrees.

[mongol-29]

The sight ASP-PFD is equipped with a block slant range, which according to altitude (barometric altimeter) and dive angle gives the range of the solution of a right triangle, the distance is the hypotenuse). As is clear in the mountains he will lie, but he was created for the war in Europe))))

[lmp]

The sight ASP-PFD is equipped with a block slant range, which according to altitude (barometric altimeter) and dive angle gives the range of the solution of a right triangle, the distance is the hypotenuse). As is clear in the mountains he will lie, but he was created for the war in Europe))))

 

But that's the thing, it doesn't lie in the mountains. That's why I was testing there. My guess is, at the moment, the aiming computer in the game uses AGL altitude instead of ASL altitude as it should.

 

Anyway, thanks for explaining how it should work IRL :thumbup:.

[default762792]

I've been wondering about this too. Possibly related, it does seem as if the pitot tubes can't fail. If I'm understanding the systems correctly (that's a big "if"), the ASP in the absence of radar is entirely dependent on gyroscope and pitot tube data to estimate slant range. If I disable the gyros, the range needle on the scales at the bottom of the gunsight stops working (along with a lot of other things). But if I set instant pitot tubes failure in a mission, it still continues to work. As does the IAS gauge and barometric altimeter. However, the mission debrief shows a pitot tubes failure.

 

I did some mountain flying too and the barometric and radar altitudes were going in opposite directions as I ascended yet got closer to the surface, which seems correct. And then there was some weirdness that I couldn't repeat where the throttle pipper/radar rotator (which I have mapped to a hat switch on a CH throttle controller) would move the ASP range scale needle.

 

Also I repeatedly confirmed that 6g is about the limit for FAB-100 MERs and UB-16 pods. :rolleyes:

[Andrei]

Cobra once mentioned somewhere that the ASP in terms of ground targeting is oversimplified due to "gameplay" reasons. In essence it's a cheat that will give you a valid firing solution every time.

 

One thing I wish for, that in the later patches, LN will implement proper logic of the ASP without accurate distance/altitude measurements. It can be toggle-able in MiG custom settings.

[zaelu]

Cobra once mentioned somewhere that the ASP in terms of ground targeting is oversimplified due to "gameplay" reasons. In essence it's a cheat that will give you a valid firing solution every time.

 

One thing I wish for, that in the later patches, LN will implement proper logic of the ASP without accurate distance/altitude measurements. It can be toggle-able in MiG custom settings.

 

 

+1 if that is the case.