INS

[Blinky.ben]

I have some question about INS

 

1. It seems that the drift with INS moves a lot in a fairly short amount of time, I realise it also depends on how much turning you do but I can take-off and conduct a fairly simple nav exercise and once I return to the airfield using the approach system the waypoint is way off from the runway. is this right?

 

2. When I return back to the airfield in bad weather with poor visibility It seems strange to have to come down very low level to have to over fly the runway to update the INS position for the runway so that I can then conduct a instrument approach. Doesn’t that defeat the point of the instrument approach as I have had to overfly the runway at a very low level to get accuracy anyway. Is there another way I can get a position update?

 

3. With the INS+GPS Turned on how come there is still so much drift? If GPS is also updating position shouldn’t there be almost no drift?

 

Thanks

Edited April 15, 2020 by Blinky.ben

[uboats]

1. The INS drift is around 1.x nm per hour, so the indication of AF pos in ref to your own pos has an offset

 

2. In bad weather cond, you can use APR + TCN to locate the AF, then switch to APR + ILS. Since the relative position of TCN not affect by INS drift. Or with HNS (after fixed).

 

3. The HNS is still under tuning. Seems now HNS works like INS, will fix

[LastRifleRound]

1. The INS drift is around 1.x nm per hour, so the indication of AF pos in ref to your own pos has an offset

 

2. In bad weather cond, you can use APR + TCN to locate the AF, then switch to APR + ILS. Since the relative position of TCN not affect by INS drift. Or with HNS (after fixed).

 

3. The HNS is still under tuning. Seems now HNS works like INS, will fix

 

Does the JF17 have a more precise way of updating it's nav system using sensors that aren't modeled yet, or does it only have overfly updates and no designation updates?

[Blinky.ben]

1. The INS drift is around 1.x nm per hour, so the indication of AF pos in ref to your own pos has an offset

 

2. In bad weather cond, you can use APR + TCN to locate the AF, then switch to APR + ILS. Since the relative position of TCN not affect by INS drift. Or with HNS (after fixed).

 

3. The HNS is still under tuning. Seems now HNS works like INS, will fix

 

Ok thanks heaps for the your reply, that helps

[amalahama]

Does the JF17 have a more precise way of updating it's nav system using sensors that aren't modeled yet, or does it only have overfly updates and no designation updates?

 

I think it's mentioned somewhere that additional INS fix modes are WIP

[Shrike88]

Does it fix the drift or reduce when placing HNS into INS+GPS ?

 

Dont have the AC manual so cannot reference to be sure. Assuming it links the two or slaves off of GPS ?

 

This implemented or what your referring to @amalahama ? The HNS UFC not implimented yet ?

 

Thanks UBOATS for implementing the slave mode if its currently not working.

Edited April 16, 2020 by Shrike88
Read threads

[AeriaGloria]

I always have accurate coordinates in HNS on, and really off coordinates if it’s on just INS. One thing is that HNS is on from air start but not part of the tutorial or start up procedure including hot start, so those are times it needs to be done. System will always default to INS only unless you press HNS button. That’s just my experience

[foxwxl]

Cold start only set the plane HNS into INS, U need to manually switch it into INS+GPS

[Blinky.ben]

Cold start only set the plane HNS into INS, U need to manually switch it into INS+GPS

 

I didn’t realise you had to press HNS for it to work. I thought if it said INS+GPS it was active. Thanks for the tip

[Mustang25]

Cold start only set the plane HNS into INS, U need to manually switch it into INS+GPS

 

Little nuggets of info like this really make me wish we had a proper manual released :D

[foxwxl]

Little nuggets of info like this really make me wish we had a proper manual released :D

 

Yep, wish our bind date master have time to finish a more complete manual.:D

[LastRifleRound]

I didn’t realise you had to press HNS for it to work. I thought if it said INS+GPS it was active. Thanks for the tip

 

You don't, if it says INS+GPS, the button should be lit green and it should be working...