Hey, people!
Since I've found this nice picture, I would like to request reworking of the early ASP sights (La-9 - also K-14 or the old sovied fixed sights used, depending on series, La-11, MiG-15/17 - maybe 19, not sure with that). They all work and look the same (again, not sure with MiG-19, that one actually uses quite huge piece of glass for sight, so I think it might look more like MiG-21 sights - further research needed).
The following picture is the one of ASP-3N - this one showed most features.
First the inner part - ceter dot and those diamonds around - those are pretty much like the sight in F-86. Wingspan and range. Then there is the outer ring. AFAIK it is the minimum range - if the "F-86" sight spreads all the way to the outer ring, you are in minimum range - if your target has full 45 m. The outer ring should fill 7 ° of view (132 mils). The moving ring - the diamonds - should have maximal spread of 7 ° and minimal of 1 ° and when on full spread, they lay on the short lines of the outside ring.
The minimal sighting distance should be 150 m, maximal 800. For MiG-17, the distance can be provided manually or using radar ranging device (which might be damaged or might be detected by enemy RWR - that's why there is the alternative) - ranging device does not work with IFF. Ranging device can be used to measure distance to ground, but sight itself does not have ground attack option.
In caged mode, all the mentioned "parts" so far should be visible and caged. That means - outside circle, center dot, diamonds. You can adjust the range for sight - so that the diameter of diamonds changes. (The sight shows you also the choosen distance.)
In uncaged/gyro mode, it all moves together (the outer ring gets uncaged as well).
...and now we are getting to the mysterious thing off the middle. That is, ladies and gentlemen, the radar mark. Yes. This is from MiG-17 PF.
As you may know, the RP-1/2/5 consists of two radars - one in the center of intake and one on the top of it. The top one is search antenna - not interesting for us at the moment. The central one is for the tracking. And tracked target is indicated not in the side-screen (that huge tubular thing to the left of the sight), but on the gunsight, in HUD manner. The target is locked on automatically, when radar is active, and picture shows up on the screen. The circle shows enemy plane position, the lines to the sides of the circle show range. As it gets closer, the lines get wider. And, at least it would be logical, if it has the same diameter as the outer ring, it is right in your face with 150 m distance.
Also notable is, that the tracking was provided within 7 deg cone - that is the size of the outer ring of the sight - so you are trying to keep target inside the caged sight. But you can also uncage the sight and use it for precise night-time shooting. But you risk loosing contact with your target, since you wouldn't know where the 7 deg limit is.
Cheers.
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Topic: Early ASP sights (Read 2269 times)
