Engine Power/Aircraft Speed

[Templar560]

Every time I tried putting the mixture to rich the engine just cut out. on the ground and in the air.

[felixx75]

6 minutes ago, Templar560 said:

Every time I tried putting the mixture to rich the engine just cut out. on the ground and in the air.

Aft position        = Cut Off
Middle position  = Auto Lean

Forward position = Auto Rich

[Templar560]

3 minutes ago, felixx75 said:

Aft position        = Cut Off
Middle position  = Auto Lean

Forward position = Auto Rich

rgr. Also do you think the gear bug could be a factor?

[felixx75]

2 minutes ago, Templar560 said:

rgr. Also do you think the gear bug could be a factor?

Wich gear bug?

[Templar560]

1 hour ago, felixx75 said:

Wich gear bug?

The one where in multplayer you put your gear up but for everyone outside it's still down. If it's just visual that's fine but if not and the gear is down when it says it's up would induce drag causing the aircraft to not fly as fast. There's a thread on it in this forum.

[tekwoj]

14 hours ago, Templar560 said:

The one where in multplayer you put your gear up but for everyone outside it's still down. If it's just visual that's fine but if not and the gear is down when it says it's up would induce drag causing the aircraft to not fly as fast. There's a thread on it in this forum.

The gear is just visual for other players. You feel very distinct difference in aircraft trim between gear up and down.

[zcrazyx]

Here are my experiances with the corsair, given that the rpm can be mouses adjusted to over 4000rpm, it leads me to believe that perhaps the rpm logic is messed up even up to 2700rpm and that perhaps we are not producing the correct thrust or drag under normal engine conditions.

Corsair 20,000ft

399kts 290kts indicated 4200rpm, high blower 72inches

310kts 230kts indicated 2700rpm, high blower 61inches

Sea level
325kts, 325kts indicated, 4200rpm, neutral blower 72 inches

250kts 250kts indicated, 2700rpm, neutral blower 58 mani

In my tests in the mission editor the corsair with unrealistic rpm was almost 30kts faster then the mustang at 20,000ft and 10kts faster at sea level. 

I also managed a 560kts dive from 30,000ft. 

 

While these figures are only from the mission editor and map, they should translate well relative to other conditions.

 

The other behaviour i've noticed when under normal power.

max speed sea level 250kts, yet also 250kts indicated with 2x tiny tim and 1x 1000lb bomb at 15,000ft.

Edited June 28 by zcrazyx

[M1Combat]

Yes I'm getting to 4200RPM as well with the slider-mouse rev-yank technique...  I suspect that's not correct but maybe.  I'm not sure if it was designed to never allow that much revs or if they told the pilot "don't do that" or what...  like the paddle in the hornet maybe?  I don't know but I suspect not.

nullThese pics are 3700, 3900 and 4200RPM.  Speed is slow because I just took off, trimmed-ish and started yanking the rev lever.

 

In the 4200RPM I included the cyl head temp because as you can see it's already cooking...  I mean I don't blame it I had all the intakes closed.

null

null

[Saxman]

That's definitely a bug/exploit. I don't think it was physically possible to set the RPMs past 2700 in the real machine.

[Nealius]

Like the Jug, you could go over 2700, and in dive conditions did. Pulling a number out of my aft orifice but I think there was a limit of like 3050rpm in a dive? At any rate, breaking those limitations for extended periods of time would break the....something in there and you'd get a windmill for a prop. The P-47 had issues with that for a while where it would break too easily.

[felixx75]

3700 rpm or even higher are guaranteed to be a bug. The engine would probably not last 5 seconds (if at all).

[tekwoj]

I think the do not exceed rpm in dive was 3200.

[felixx75]

In P-47 it is 3050 RPM, if I am not mistaken.

I would be surprised if it were higher in the F4U, especially as you could only achieve that in the F4U in a dive (if at all), as you can't physically set more than 2700 RPM.

[450Devil]

From the Pilot Notes in the Diving Limitations Section

[Rougaroux]

Since it got deleted in the other thread, here's the speed comparison between the Fw-190 and the F4u

I just did a test run and I cannot hit these numbers at any speed, any configuration at any altitude with the prop pitch at 2700 rpm and the engine at straight & level flight, with or without WEP.

Knots are in plain numbers, MPH is in (###).

[Dkha]

3 minutes ago, Rougaroux said:

Since it got deleted in the other thread, here's the speed comparison between the Fw-190 and the F4u

I just did a test run and I cannot hit these numbers at any speed, any configuration at any altitude with the prop pitch at 2700 rpm and the engine at straight & level flight, with or without WEP.

Knots are in plain numbers, MPH is in (###).

That’s exactly what I’ve been thinking. The F4U, even at 2700 RPM, can’t reach the speed it should. It only gets there with WEP or by using the RPM bug. I was discussing this with other people, but the topic creator (about a bug everyone knows) got upset and closed the discussion... anyway, thanks a lot.

[Rougaroux]

3 minutes ago, Dkha said:

That’s exactly what I’ve been thinking. The F4U, even at 2700 RPM, can’t reach the speed it should. It only gets there with WEP or by using the RPM bug. I was discussing this with other people, but the topic creator (about a bug everyone knows) got upset and closed the discussion... anyway, thanks a lot.

it doesn't even get there with WEP. These pictures are with WEP on and off at 18,500 feet.  Top is WEP off, bottom is WEP on (after at least 5 minutes..my green warning light was on)

 

Edited June 30 by Rougaroux

[Dkha]

3 minutes ago, Rougaroux said:

Nem chega lá com o WEP. Estas fotos são com o WEP ligado e desligado a 5.750 metros. Acima, o WEP desligado, abaixo, o WEP ligado (depois de pelo menos 5 minutos... minha luz verde de alerta estava acesa).

 

Got it. 

 

[Saxman]

Just now, Rougaroux said:

it doesn't even get there with WEP. These pictures are with WEP on and off at 18,500 feet.  Left is WEP off, right is WEP on (after at least 5 minutes..my green warning light was on)

 

236kts IAS at 18,500 feet is 352kts TAS is 405mph TAS.

Looks about right for that altitude to me.

[M1Combat]

Sorry to delete (actually just hide) that other thread.  I'm just trying to keep the discussion of the issue separate.  I fully feel that they are related in various ways...  I just want to specifically point out the prop governor axis issue.  That's probably not super hard to stop for the devs.  I realize that may not solve THIS problem...  but at the least it will put everyone on the same page with regard to what you can do or know you can do with the aircraft in the short term and ALSO might get the dev's testing crew around what might  have a hand in causing the issue that's the subject of this thread :).

[Rougaroux]

7 minutes ago, Saxman said:

236kts IAS at 18,500 feet is 352kts TAS is 405mph TAS.

Looks about right for that altitude to me.

Oh really? Show your work.

 

[felixx75]

The engine does what it is supposed to do and hits the values it is supposed to achieve very accurately. However, the speed is too low, at least according to the table posted above. I cannot judge whether this is correct or not, as too much information is missing from this table.

[Dkha]

7 minutes ago, felixx75 said:

 

 

This TS  where it shows the speed—would that be TAS? True Airspeed? Because if that speed is IAS, the plane is at 409 KNOTS (IAS)."
 

 

[felixx75]

9 minutes ago, Dkha said:

 

It's True Airspeed. 

You can switch between IAS and TS with STRG+Z (or CTRL+Y, depending on the keyboard layout).

You can see above, that's about 235 kt IAS

Edited June 30 by felixx75

[Rougaroux]

5 minutes ago, felixx75 said:

It's True Airspeed. 

You can switch between IAS and TS with STRG+Z (or CTRL+Y, depending on the keyboard layout).

You can see above, that's about 235 kt IAS

Thanks for that keyboard shortcut. I was looking for that.

Based on that your airspeed is about a hundred knots low off the chart I posted.

Admittedly I got that snippet from a forum that had a website with performance charts linked BUT the original source site has been shut down. It's the best I can find in a short time...i wanted to throw numbers less and fly more