Anatoli-Kagari9

Question for Yo-Yo... - Why would then, the German engineers, have chosen to install those trim tabs in the K-4, actually a pair of trim tabs easily seen ? - Why would the reports mentioned by Curly refer the reasons for it's use ? DCS is trying to simulate as close as possible the 109 K-4. You find that it doesn't make sense to have that solution, and it is counter-intuitive, so the decision is to simply truncate it by creating a fixed ( at zero deflection ) elevator trim tabs, because you think ( ? ) that's how the ww2 engineers, ground crew and pilots should have chosen to use it ? I would accept a justification based on complexity of implementing this feature now, that the module is final, due to the fact that you are 1 ( one ) and there is a LOT of work to do because we all want more ww2 modules, and heck, as much as I am critical here, I also am here because DCS is second to none in details, interaction with modeled systems, precision - it's an Air Combat Study Sim, it's THE AIr Combat Study Sim, and pretty much the only one we have at that level and you should be "blamed" for that :-) I just don't think that questioning the evident is of any use here in this thread. Both rel4y and Curly have done a REMARKABLE job in providing well founded justifications for the importance of modeling those elevator trim tabs.

It does - tested it this morning :-)

After having given up on asking for it, starting 2 yrs ago, I was tempted to believe it's actually some limitation in the DCS flight dynamics for these combination of elevator + stabilator + elevator trim tabs.... In another ww2 sim I use they're set, for nose heavy, and we can see the elevator deflect down just from propwash when we apply takeoff power... The aircraft also handles more plausibly / harmoniously IMO.

Unfortunately not so uncommon IRL too:

Or.... it's effects aren't simply modeled at all ? I would be sad to learn that's a fact... Hope not because I am really enjoying this "little bee" / fly / Rata.... I find that effect of pitching up moment due to Flap deployment very nasty though :-/ Is it like that in the real thing ?

Thank you P51Chris for sharing this excellent experience you had in DCS! It's a great video, and very good flying ! EDIT: And that Youtube Channel of your's is Worth following !

Indeed a MUST HAVE module !

We're, slowly getting there @rel4y !!! Thanks for not giving up ! I am sure Yo-Yo will, eventually, get the idea you're trying to pass, and we will, eventually, get a more harmonious control in pitch, or even ( ideally ) a way to set the ground adjustable elevator trim tabs...

BIG THANK YOU KalAbaddon !!!

An excellent explanation too here, by RustBelt: https://forums.eagle.ru/showpost.php?p=3908224&postcount=6 One aspect it helped me understanding is why sometimes the gear crank starts turning slowly and eventually stops from turning at all !

Very GOOD Explanation! @RustBelt !!! BIG THANK YOU!

I wonder if this is correctly modelled ? Isn't it in the Series 24, equipped with carburettors with a configuration which was meant to avoid flooding / starvation ?

Does this mean that in the controller setup we cant map any rotaries like those available in the X.52 HOTAS to mixture and prop rpm ? EDIT: Well I was able to at least set the Prop RPM into a rotary in my X.52 HOTAS unit. No luck for the Mixture though :-/

Yep, but it's always good practice I believe. Thx for the feedback razo+r !

Ok grafspee, Thx for the feedback!

I wonder ho you lucky I-16 owners are finding the engine management modeling ? Is Mixture an important factor to control, as you climb? I believe this was the case IRL ? What about engine temperatures and the cowling / oil radiator ? Is it important to manage it in order to keep the temps under control ? Thank you for any feedback!

Thx Phill, as usual, a very informative and well done video! Looks like a very well designed model, in all aspects. Professional quality!

Wow! Does this mean we're getting a better feel of the trimmed speeds if it get's corrected in the DCS model ?

He's referring to the ground-crew adjustable elevator trim, actually available as two trim plates one on each elevator, in the real K-4, and graphically in the DCS K-4 too. This would allow for better fine tuning depending on rigging, loading & CoG, etc... Like IRL...

Looks really Tempting!

The effect was something that puzzled me too initialy. Later I found some pilot notes on it. Unfortunately I didn't save the URL :-/ The other effect, that of the propwash deflection under strong x-wind takeoffs, and it's impact on the takeoff run is also mentioned in a document - techinal / aerodynamics - that I once forwarded to Yo-Yo as a sort of "sorry guy... you were right after all..." So, overall I tend to accept the way some things are modeled even if I can find that they could probably be fine tuned. But in DCS World it depends a lot in the hardware we use to control our modules.

I believe it could make a whole lot of a difference towards a better "depiction" of how a real K-4 should fly...

Only aspect I can comment on is the feel of the "lack of inertia" in ground operations. All of the modules feel "too loose" when I apply thrust on ground. The inertia while taxiing is very reduced, but of course I can't compare with the real thing - I have far from any experience with such types ...

In every video I've been watching there's almost no displacement of the "ball" in the turn coordinator, including when taxiing and making sharp turns on ground. Inflight the ball stays pretty much centered most of the time. Wonder if this is actually a characteristic of the real aircraft or some limitation of the current code of the turn coordinator ?

Touché :-) Then, I believe it can actually be realistic, although not easy to replicate IRL because certainly few pilots, alive, have been able to experience flying under such circumstances and living to tell about the effect. It makes sense, as my previous posts suggest - trying to explain it as a "generalized form of P-Factor", but I was somehow renitent to accept it could make a heavy 51d move that way… Probably it would.