Flagrum Posted July 24, 2021 Posted July 24, 2021 When slewing the IRMAV seeker, the slew rate is depending on where the seeker is looking at. The farther away, the slower the slew rate. If you are looking at a point close by, the slew rate is very high and it is impossible to be precise - even with an minimal axis saturation (like 10% my case). On the other hand, if you are looking somewhere far out, near the horizon, the slew rate is very low. The closer you are to the ground the more pronounced the effect is. Seems to me as if the slew rate is directly depending on the absolute distance between aircraft and the point on the ground that you are looking at. The slew rate in degrees per second should not change, right? So the distance traveled by the pipper over ground per second would increase farther out, but the distance traveled by the pipper on the MFD or HUD per second should be constant. Also the horizontal slew rate is higher than the vertical one, which makes slewing even more inprecise. You will notice that in the video feed, but the IRMAV pipper on the HUD demonstrates the difference really well. IRMV slew.trk
Hornet81 Posted July 27, 2021 Posted July 27, 2021 (edited) @Flagrum, I have checked your track. You were in INS mode. With the last updates in INS you will not be able to move the seeker of the Mav. To do so you will have to press SS FWD an be in IRMV mode. Then you will be able to slew the seeker. According to my tests the slew sensitivity is very good. Let me know if that worked Edited July 27, 2021 by Hornet81 1
Flagrum Posted July 27, 2021 Author Posted July 27, 2021 Yes, thank you very much, that work for me as well. It's been a while since I more seriously fiddled around with the Harrier - so yes, this was an user error. The IRMAV seems to be ok! But regarding INS - then the behaviour I observed was more likely a direct result of the bug that @Kappa had reported, right? Something with the TDC and the EHDS/INS seems off.
Hornet81 Posted July 28, 2021 Posted July 28, 2021 Glad that it worked for you. I don’t think it was related because what kappa reported was when slewing the TPOD in INS HUD DES and the issue you had was when moving the seeker when the Mavs were uncaged. Thanks again for the report. We will move this one to the solved.
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