Questions regarding possible manual vs. sim inconsistencies

[Frederf]

I have a bad habit of believing everything the manual tells me ^.^ We've been told for so long that "Blinky light problem = didn't let INU go for 3 minutes" that it's tempting to believe it's true!

 

I saw the "3 minutes for accelerated alignment" in the manual and compared it with the "If I take off in less than 3 minutes my AP channels blink off when auto-hover is engaged" and came to a natural but incorrect conclusion. Do you have any written evidence from the flight manual to explain the AP channel blink-off behavior regarding the doppler system? It appears to be exactly true but it's nice to have in writing.

 

A16 also suggested that dopper systems need to get some changing terrain passing by below them before they get a "running picture" to work. Sort of like how a (optical) computer mouse needs to be moved before it has a chance to compare. Don't know how true this is in DCS but it's an interesting idea.

 

Interestingly enough I cannot get the AP channel lights to blink-off if I don't try to engage auto-hover no matter how fast I take off after INU and K-041 initialization. Btw, the NAV switch and the K-041 are redundant for flight ops, K-041 is the only one that need by flipped and the NAV ignored.

 

If I turn off the INU switch mid-flight I get PITCH, BANK AP channel failure but heading remains on. The auto-hover blink-off is PITCH, BANK, and HEADING though.

 

Unrelated but the INU is a "IK-VK" model that I cannot find any information on via Google. Perhaps researching the real thing might lead to new discoveries.

Edited May 12, 2010 by Frederf

[EinsteinEP]

A16 also suggested that dopper systems need to get some changing terrain passing by below them before they get a "running picture" to work.

That Alpha One Six is one smart cookie! ;)

 

Do you have any written evidence from the flight manual to explain the AP channel blink-off behavior regarding the doppler system?

I do not. Somewhere I read that the auto-hover system uses doppler velocimeter data to maintain position, and then I noticed that when I do a super fast start it takes a while for the groundspeed (which I knew came from the doppler system) to come up in the HUD, even after the HUD was up. I put the two together and tested it out.

 

With no disrespect intended for ED (love you guys!), I find the DCS Black Shark flight manual is incomplete. Of course, a complete description of every system on the Ka-50 would take up thousands of pages, so I'm glad to have as much info in there as we do have! I've just learned to not expect to find all the answers in the manual.

 

Test, test, test! And if you're still not sure, post your idea here and have folks flame it!

[Hunden Ynk]

I'm necroing this very fine old thread. Has the Bank and Pitch steering bars ever worked as described in the manual on page 6-17. I'm assuming their operation should be similar to the Su-25 ADI?

[Flagrum]

I'm necroing this very fine old thread. Has the Bank and Pitch steering bars ever worked as described in the manual on page 6-17. I'm assuming their operation should be similar to the Su-25 ADI?

http://forums.eagle.ru/showpost.php?p=725462&postcount=4

[Holton181]

Well, been four years since last time getting a necropost, but it do contains a lot of good information. I figured to contribute a little myself:

 

Regarding #12, WP sequence reorganization. It does work as described in the manual.

BUT! They forgot some essential information not completely obvious. All WP will keep their numbers.

Let's say we have a WP sequence like 1-2-3-4 away from home, and now we like to go back. Follow the instructions in the manual and your sequence will become 4-3-2-1, i.e. to start navigation home you enter nr4 as the starting WP and it will automatically go to nr3 after passing nr4, then nr2 and finally nr1.

 

So, following the manual will NOT turn 4 to 1, 3 to 2 and so on!