Anatoli-Kagari9

Thx for the video @AcroGimp :thumbup: Interesting to check that that pitching up and the drag from flaps deployment aren't ok in your view. Hope they get fine tuned :-)

Ok, then, not Hyd. but rather Pneum. and it releases the system from an useless effort... My thought wasn't totaly wrong after all :-)

Oops! Thought it used a Boeing/Airbus-like solution :-)

I think it should be meant to depressurize the associated Hyd sys...

In teh Quick Missions I edited, I can't see where the rear pilot / pax is defined ? How can we "add / subtract" a rear pilot in the Mission Editor ?

Ah! Good hint Yo-Yo !!! In the video the pilot is flying alone, in DCS World since I installed the Yak-52 module I only use the Quick Missions and takeoff or landing scenarios... I didn't check if those include a tandem pilot, but if that's the case then indeed the reaward CoG will certainly play a role. Will check that latter today. Thx :thumbup:

Indeed as @bbrz explains above, regarding my observation on Yo-Yo's reply It's worth what it's worth, but this video shows no such a pitch-up tendency followed by significant stick deflection on landing - 360º view video: https://www.youtube.com/watch?v=-fkuJXzdFMM The initial part is a short circuit with touch & go, then aerobatics, and then you can skip towards the end ( 9:50 ) to watch the landing. Don't forget to use the mouse with left button to pan around 360º ...

I didn't say it didn't - just gave the Spitfire example as an interesting alternative to the stick fixed vs stick free approach. The force felt in the stick, in the real Yak-52, could as well be modeled by a slight stick deflection that the pilot will naturally counter, just like in the Spitfire Mk. IX module.

They actually found a very nice way around with the Spitfire IX... The virtual stick deflects forward to adapt to the new trim when flaps are lowered, causing the natural pitching down moment that the pilot naturally counters by pulling the stick. With such an approach in the Yak-52 I believe we would all be satisfied :-)

To call the attention of the developers to this subject which other users referred to in another thread on general observations about the comparison between the real and the simulated Yak-52, and following Yo-Yo's response to the "pitching up" moment that can be experienced when deflecting the Yak 52 Flaps, namely the one in this post: https://forums.eagle.ru/showpost.php?p=3588729&postcount=55 I would just like to suggest that as implemented in the Spitfire Mk. IX, a stick deflection due to the change of trim, forcing the virtual pilot to pull the stick in the case of the Spitfire, could also be modelled in the Yak-52. This way, whenever flaps were lowered, we could see the virtual stick deflecting fwd, and be forced to pull it back.

Indeed another Masterpiece by Yo-Yo / ED team !!! Ya-Da-Team !!!!!

I understand, and agree, of course, but I would suggest a similar implementation to that on the Spitfire Mk IX, where indeed the virtual stick deflects due to the change in trimming, and we're forced to pull it when we deflect the flaps.

Beware that today's update created separate settings for controllers of both versions of the Spitfire, while before they appeared to share the same set of axis. Check if the particular model you're experiencing this effect got a new button / axis / slider to the RPM axis ? From today's update: DCS Spitfire IX When you call the Input Panel in the game will open the correct profile of the Spitfire modification.

Hmmmm, I do not presently have DCS installed, and even less the 51d, but from what I remember that's weird. You sure you really do not have another axis assigned on some of your controllers to the rudder ? That wobbling doesn't make sense, and I never saw it unless either takeoff assist is enabled and / or auto-rudder ....

?

As propwash builds up over the tail surfaces, the rudder trim tab ( assuming you've set it for takeoff ) will "start doing it's work" and deflecting the rudder to the right, right rudder pedal ahead left rudder pedal back... This is probably what you're watching. If you set aileron trim, and a headwind of 10m/s or more you will also be able to notice a stick deflection due to the wind over the aileron trim tabs.

Excellent work indeed HWasp ! Can we expect it to be patched soon ?

Torque can also be felt "by the negative".... Set your prop aircraft ( P51d or TF51 ) trimmed as close as possible for level flight, at a given power regime. Now decrease power, slowly down to iddle ( or more abruptly if you don't risk destroying your engine ), and watch the CW rotation due to factors such as the negative propwash (axial component), and the now "overdone" contribution of the aileron trim ( maybe also rudder trim ) and tail fin cant that are present to overcome torque and slipstream effects at cruise power settings... The fact that that CW rotation starts developing, and you actually have to counter it with left stick and then by trimming, is a good "indication" of torque being present while in the regime you started with. On most prop aircraft I've flown in ( as a pax, since I only own a GPL ) including glider tugs, it used to puzzle me when I started thinking about this stuff more from a "simmer" pov, how the combination of prop effects translated mostly into yaw, instead of roll, even in situations where the pilot firewalled the throttle in a quite abrupt way.

Excellent data ( even if not "professional" ) . I will not be able to try your track, but I agree from the observations that something looks wrong indeed ! Thx

Or... not a problem but rather a well programmed feature that doesn't get modeled right in many flight simulators... A good example are the slipstream effects, and the asymmetric "hit" in the lower surface of the left wing, left sections of the fuselage and, above all, left vstab and rudder surfaces ( for the areas above CoG )... These all tend to counter torque , in the presence of slipstream, which is actually maximized at high power ratings and lower TAS... I still remember well when along it's v9 iteration, Austin introduced torque in X-Plane :-/... It took years to correct, and we're still dealing with the rest of the effects... That's why DCS, and sorry but I really have to mention it here too - IL-2 BoX - are light-years ahead of most civil sims in modelling these and other effects. I also still remember the first time I met the effects of deflected propwash during takeoffs under strong crosswinds with exactly these same P51d.... Have you tried it ? Get your P51d in the rw with a 10m/s wind from, say, your 10 o'clock, and see what goes on when you add takeoff power ... Ah, and BTW, torque should also be countered using RUDDER, not ailerons ! It's obvious if you take into account adverse yaw from the wing the get's it's aileron down to counter the torque ( left in a CW rotating prop aircraft ), and well explained for instance... So, not saying it's perfect, but it certainly must be really close to it in as far as it is possible with such a program...

I think in as far as engine / prop torque go, it's being calculated correctly, speed and AoA only contributing to enhance or "shadow" it's effects. P-factor that's a different story, and same regarding slipstream, which I believe is also calculated taking into consideration various interactions. Actually the only aspect I always found a bit overdone ( but have no real world data or experience to base my affirmation in… ) is P-factor. P-fcator plays a very important role at least in the P51d, and it shows during final approach when I always see the nose wanting to wobble around... BTW: Believe the OP is referring to what he recorded in this video: which was recorded at 16k feet!

Ah! SZDs I just flew two other great models, the Cobra 15 and the Standard Mucha.... Regarding the P-51 in DCS, last time I flew it, long ago, t did show excellent torque effects, that I used to compare to the previous best experience I have had with a P-51 in a flight simulator : the A2A P51d Civil and Military versions, which could easily climb without torque effects until speed got down to Vs0... Maybe things changed with the latest DCS updates ?

Let there be Gliders !!!! No more funky prop effects discussions :-)

Never had that before, SDD, 16 GB DDR3.

With the last update of 2.5, already with teh CW Spit, when flying the default missions ( dogfight ) I get freezes sometimes of a few seconds, mostly when shooting at the enemy aircraft. I am not using TIR5 since it quited working for me after the last Win 10 update. Although overall performance seems ok, partly because I use conservative settings too, these freezes happen frequently and can affect the gameplay :-/