DH v. DT switch

[sobe]

Could someone please give me an example of the difference between the use of the DT and DH switches:

 

DESIRED HEADING_ DESIRED TRACK ANGLE SWITCH

The DH DT switch located on the RH sill panel provides either a Course Reference or Heading reference for the Auto pilot to maintain. In the Desired Track (DT) position the AFCS assumes that the pilot wants to fly the planned track to the active PVI800 Waypoint, that is it selects Course Line steering. A course deviation scale is displayed in the lower portion of the HUD. In the Desired Heading (DH) position the AFCS assumes the pilot wants to fly directly to the Active PVI800 waypoint. In the deselected position (centre) the AFCS assumes the pilot wants to maintain the last set reference heading.:helpsmilie:

[Rhino4]

You want a dumbed down version?

 

Desired Heading: Flies you directly towards whatever waypoint you have selected, regardless of where you happen to be when you activate it.

 

Desired track angle: Flies you to the closest point between your last waypoint and the one you have selected and then follows the line towards the selected waypoint.

 

Middle position: Keeps you heading in whatever direction your were facing when you released trim.

 

EDIT: Maybe you want to know why/when to use each one? Desired track angle is used primarily when you need to follow a specific course (ie: to get through known SAM coverage. Desired heading just gets you to the waypoint by the fastest route.

[sobe]

Thanks for the quick reply and that is exactly what I wanted. Any chance of you rewriting the manual in (conversational) English?

To continue this question, I take it that you use the DT/DH switch in conjunction with the PV1800. Does the Abris map screen have any relation to the way points in the PV1800. I understand they are 2 seperate systems. Which navigation system shows up on the heads up display for the caret heading to the wp?

[Rhino4]

The ABRIS is pretty much a stand alone device. All of your HUD info comes from the PVI-800. The ABRIS can be used to give you a visual representation of where you are, where your shkval is pointing, and where different known threats are (via datalink), but you can't use it with the autopilot. You CAN use it to find lat/long numbers for a given object/runway/target point/ect and then input those numbers into the pvi-800 with the edit function. Then you can use the pvi-800 to autonav to that point.

[L4key]

Just explained more than I ever worked out about the ABRIS and PVI, thanks Rhino and good question Sobe.

 

People can say RTFM if they want and believe me I'm a good reader and do, but sometimes it's nice to have plain English for the lay person!

[My Fing ID]

I still haven't figured out how to use the PVI-800. I can hit a few buttons but all I do is make some buttons glow and make a few numbers pop up. It's like a broken number box to me. The ABRIS is much more intuitive.

[press]

I still haven't figured out how to use the PVI-800. I can hit a few buttons but all I do is make some buttons glow and make a few numbers pop up. It's like a broken number box to me. The ABRIS is much more intuitive.

 

Maybe you should watch the producers notes and/or read the manual.

[L4key]

Maybe you should watch the producers notes and/or read the manual.

 

 

Maybe you should read my post? Unless you're being sarcastic but the absence of smiley didn't suggest so, and in which case ignore me!

 

What I was saying is that sometimes the plain English explanation is great! I can read and am relatively intelligent (:cry:) but the manual for certain things just sounds like gobbledegook. I appreciate that may come across as a bit thick, or maybe I am impatient but I've learn't a hell of a lot from posters on here, both ED team and members about how to fly the thing.

 

I just don't want to put off noobs like me, who are worried about asking a question. Like everything there should be a balance - you should take the time to learn it yourself to a point but a bit of advice from a poster is sacred sometimes.

 

I think that anyone who has read this forum and actually bothers posting having bought the sim knows what they are in for and that it won't be easy, which filters the HAWX people out. I just wouldn't go too far the other way and be too exclusive to people who at the end of the day are just the general public. So thats why 'RTM' responses are not always helpful.

 

(IMHO!) :smilewink:

[nemises]

I still haven't figured out how to use the PVI-800. I can hit a few buttons but all I do is make some buttons glow and make a few numbers pop up. It's like a broken number box to me. The ABRIS is much more intuitive.

 

Hiya Fing,

The only part you are missing about the PVI is the fact that it drives the heading and distance info on the HSI (round compass like guage on the lower left side next to the TV screen)...the numbers, while looking pretty, are only lat/long info, and only usefull for a select few hardcore ;) ... Use the HSI to see where the PVI waypoint is.

 

the HSI is your primary navigation display, and gives you heading and range (and track angle) to the Selected PVI waypoint. The PVI also gives the same info to your HUD display, so will show a heading carrot on your HUD, and it also instructs the autopilot.

 

What can (often) happen in combat, is for the AC power to drop out for various reasons (emergency stops degrading rotor RPM, or damage to the generators), in which case you will not have the ABRIS to navigate with....

 

the Abris is a great "quick look" SA tool, but your navigation will be much more accurate if you use the HSI and PVI ..

 

The PVI stores up to 6 waypoints, and 2 airfields (all done automatically in the mission editor by the mission designer)..to access the waypoints, press the "waypoint" button, then press the number of the waypoint you want (1 .. 6), be aware!!!!... the PVI waypoints can be differnt names / numbers to the Abris waypoints! ...

PVI Nav waypoint 1 is the first NON Takeoff waypoint...

 

Takeoff and Landing airfields are stored seperately, and access by pressing the "Air Field" button, then either 1 (for takeoff field) or 2 (for landing field IF it is different from takeoff)

 

so in short, the ABRIS is great, and usefull, but is only a navigation guide....accuracy and integration into the shark's AP and sterring systems is only via the PVI.

[My Fing ID]

ty. I was wondering why that thing was there since I was able to just fly off the map. Guess that also explains why I never could find a nav carrot. I'd tried reading the manual on the system but it's like trying to read a dictionary. Very hard to understand what it's saying some times. Maybe I was just reading the wrong part though. In any case thank you again.

[Zorrin]

What I was saying is that sometimes the plain English explanation is great! I can read and am relatively intelligent (:cry:) but the manual for certain things just sounds like gobbledegook.

 

 

Everything, especially manuals should be written in plain English!

 

It doesn't matter how stupid or intelligent you are, you are more likely to understand a complicated topic - such as this poxy Kamov's Russian logic :music_whistling:- if it's in easy to understand words!

 

I couldn't agree more.

 

ED if you want to employ my writing services for future manuals... :)

[nemises]

hmmm..poxy...is that in the english dictionary? ;)

[L4key]

It's after gobbledegook! :huh: