Visual bug

[grafspee]

Negative pitch on the prop blade pls fix that. what the heck is that reverse thrust ??

[Slippery Pete]

The leading edge IS swept forward...

[grafspee]

take a look at your friend's plane you are looking at your plane.

it is impossible to see that from cocpit becouse you cant look at your plane form outside from inside. Check once again but look at other player's p-51 and you will see leading edge swept back

same thing apply to all warbirds all of them have wierd pitch angle on their props, i posted earlier that p-51 has extremly thin prop disk during flight like grinder abrasive cut disk, when you look at your plane disk is kinda ok same as pitch angle of the blade but when you flying formation prop disk from side from other p-51 is almost invisible its so thin

Edited July 31, 2019 by grafspee

[bbrz]

The leading edge IS swept forward...

The leading edge and pitch are different things and have nothing to do with each other.

On the first screenshot you can see that the tip has a negative pitch angle which it shouldn't have.

On the second screenshot the tip has a positive pitch angle.

[grafspee]

The leading edge and pitch are different things and have nothing to do with each other.

On the first screenshot you can see that the tip has a negative pitch angle which it shouldn't have.

On the second screenshot the tip has a positive pitch angle.

 

what im saying is that if you look at any warbird's prop in dcs from cocpit view you will see this wrong negative pith on blade and this is killing me

[bbrz]

I don't understand. Agreed, the prop pitch at the tip is negative in the first screenshot but what has the leading edge to do with prop pitch?

[grafspee]

I don't understand. Agreed, the prop pitch at the tip is negative in the first screenshot but what has the leading edge to do with prop pitch?

 

it has. minimum pitch is 26 degrees at this setting leading edge of prop blade is first its clear at second screenshot but whne you reduce prop pitch to 0 what is probably happen on screen 1 AOA of the tip of the blade will create reverse thrust, simply blade is showing its top part to the air flow not the bottom

dont know how to explain ti if you turn the blade you are moving leading edge forward and backward center of the blade is static in relation of the plane

Edited August 1, 2019 by grafspee

[bbrz]

Ah ok, now I understand. When prop pitch is reduced, the blade rotates along its axis and the leading edge move backwards, but in the animation it rotates too much so that the trailing edge is in front, at least in the tip area.

[grafspee]

Ah ok, now I understand. When prop pitch is reduced, the blade rotates along its axis and the leading edge move backwards, but in the animation it rotates too much so that the trailing edge is in front, at least in the tip area.

 

exactly, which is completly wrong at this state

[grafspee]

another one from closer this looks so bad

[Slippery Pete]

The blade is pitched forward in either setting, the very tip seems to be confusing you but the overall blade, as its twisted, is still canted forward.

[bbrz]

No. The blade axis is perfectly perpendicular to the airplanes longitudinal axis in both cases.

It's the taper of the blade that makes the impression that it is canted forward as it rotates to a too low pitch angle.

The difference in blade angle in these screenshots is around 15°.

[Slippery Pete]

No. The blade axis is perfectly perpendicular to the airplanes longitudinal axis in both cases.

 

Yep. As it should be with the engine off sitting on the tarmac.

[bbrz]

I don't understand what you want to prove with the above screenshot. In all cases the leading edge is the most forward part at the root of the propeller blade, which is correct.

 

The problem is that in very top screenshot that the pitch at the tip is negative, which can't be IRL.

 

Again, the problem is that the pitch is around 15° too low.

[grafspee]

this is good comparison this plane with red nose will fly now where it has dead prop

we can assume that outer part of the blade is creating most of the thrust and this one with red nose will create almost non if not revers thrust

white/black is how should look 26degree pitch

you can try with other warbirds all of them have this issue

ED could just set prop pitch as static for exmaple at pitch ceuise level something like 40degrees for p-51 for other player's p-51s why they set pitch 0 i have no clue

Edited August 2, 2019 by grafspee

[Slippery Pete]

this is good comparison this plane with red nose will fly now where it has dead prop

 

Yes, that is by design. The propeller blades have variable pitch, their 'bite' against the air can change depending on the prop pitch setting. Is this not something you were aware of? I think by default AI aircraft spawn on the tarmac with minimal pitch.

[bbrz]

The propeller blades have variable pitch, their 'bite' against the air can change depending on the prop pitch setting. I think by default AI aircraft spawn on the tarmac with minimal pitch.

Again, the pitch angle on the propeller blade can never be negative at any point if the propeller isn't capable if reverse pitch! That's the whole point.

 

we can assume that outer part of the blade is creating most of the thrust

The blade creates thrust almost uniform accross it's span. That's why the pitch is always highest at the root and lowest at the tip.

Edited August 2, 2019 by bbrz

[grafspee]

Yes, that is by design. The propeller blades have variable pitch, their 'bite' against the air can change depending on the prop pitch setting. Is this not something you were aware of? I think by default AI aircraft spawn on the tarmac with minimal pitch.

 

that exactly what i mean black/white nose have minimum pitch

this red one i have no idea what is it

i am fully aware that p-51 has constant speed prop range on pitch is 26-64/65 degrees

when prop is not spining and everything is ok mechanicly wise blade will settle at minimal pitch 26 degrees and it looks like white/black nose one

[grafspee]

The blade creates thrust almost uniform accross it's span. That's why the pitch is always highest at the root and lowest at the tip.

 

ok then half of blade will pull forward and other half will push back creating no thrust, so red nose is broken

somewhere in the middle pitch is 0 so no thust at all

[bbrz]

Prop pitch is usually measured between 50-75% from the center. E.g 26° means that pitch at the root is much higher and slighty lower at the tip.

Edited August 2, 2019 by bbrz

[grafspee]

Prop pitch is usually measured between 50-75% from the center. E.g 26° means that pitch at the root is much higher and slighty lower at the tip.

 

Looks like you know this stuff.

So final verdict dcs has broken props right for non client's warbirds now. which is 100% of planes what i can see in game

adition to this this is how look p-51 prop from side in flight

client model is a little better but non client model of prop i will not comment on that thinner then my angle grinder disk

Edited August 2, 2019 by grafspee

[bbrz]

The animation is definitely wrong for the AI planes but as IRL, I usually fly only jets, so I don't encounter this problem in DCS ;)

[komemiute]

another one from closer this looks so bad

 

Virtually unplayable...

[grafspee]

The animation is definitely wrong for the AI planes but as IRL, I usually fly only jets, so I don't encounter this problem in DCS ;)

 

not only for AI, honestly i didnt check AI planes yet, those screen shoots are other player's planes

if it was only issue with ai i would not posted it at all i realy dont care about ai at all.

[grafspee]

Virtually unplayable...

 

yes exactly, for example issue with drop tanks in p-51 dont bother me at all reason is simply i dont use them and i dont intend to use them all i need is 50% of internal fuel capacity to do every flight i want, but this broken prop i see all the time and its killing me every time i see it