Level flight speed

[westr]

As far as you are concerned do you feel this subject is closed Magnitude? i.e level flight speed and engine settings are where they should be? 

[Mr_sukebe]

Has anyone retested the speed of the Corsair?

From the update notes I see that the RPM overspeed issue has been resolved, whilst drag has reduced.

At 2700rpm, how’s the speed looking against the charts?

Sorry, away from my PC for a few days, so can’t test myself

[Saxman]

40 minutes ago, Mr_sukebe said:

Has anyone retested the speed of the Corsair?

From the update notes I see that the RPM overspeed issue has been resolved, whilst drag has reduced.

At 2700rpm, how’s the speed looking against the charts?

Sorry, away from my PC for a few days, so can’t test myself

I haven't done any real scientific testing, but ADI appears to now be properly boosting MAP to the right range (now if you're not getting enough power you're probably in the wrong blower setting) and I'm no longer feeling like she's struggling to hold energy, especially in nose-up maneuvering.

[AJaromir]

I've reached 535 km/h TAS ( 332 MPH or 289 KTS ) in 5000 meters ( 16 404 feet ) in level flight. MPR 54", 2700 RPM, low blower

Edited yesterday at 12:38 PM by AJaromir

[AJaromir]

New test result: 335 KTS TAS at 20 000 ft.

Weather: 15°C QNH 29.92

75% fuel, no ammo

54" MP

2700 RPM

High blow

It is very important to properly manage the engine cowl flaps which makes really huge drag.

Edited yesterday at 01:35 PM by AJaromir

[AJaromir]

New result: with low blower I've reched 344 KTS

[Saxman]

1 hour ago, AJaromir said:

New result: with low blower I've reched 344 KTS

Injection on or off?

[AJaromir]

12 minutes ago, Saxman said:

Injection on or off?

Don't know. Did not turn on anything. Just set throttle to max

[Saxman]

1 minute ago, AJaromir said:

Don't know. Did not turn on anything. Just set throttle to max

Ok, so you don't have injection on. That's a separate key press. So you're maxing out and Military power, not WEP.

[AJaromir]

3 minutes ago, Saxman said:

Ok, so you don't have injection on. That's a separate key press. So you're maxing out and Military power, not WEP.

Yes, according to performance table.

null

[felixx75]

3 hours ago, Saxman said:

Injection on or off?

There is no “On / Off” button for the water injection.

You can operate this small microswitch with a screwdriver, for example. However, this is only intended for maintenance purposes, e.g. to fill the system. In flight, this microswitch is activated automatically by pushing the thrust lever all the way forward.

2 hours ago, AJaromir said:

Yes, according to performance table.

null

 

Edited yesterday at 06:49 PM by felixx75

[AJaromir]

So, to understand the ADI is injected once I pass the detent? Jusk asking because I have set physical detent at the exact same point.

[felixx75]

5 minutes ago, AJaromir said:

So, to understand the ADI is injected once I pass the detent? Jusk asking because I have set physical detent at the exact same point.

Water injection is activated when the throttle lever is pushed all the way forward (over the deten, all the way to the front).

Edited yesterday at 05:30 PM by felixx75

[AJaromir]

O.k. Thank You for this info. Still I don't think the F-4U in DCS:W is somehow slow. As posted above, understanding difference between IAS and TAS and propper engine management makes a big difference.

Edited yesterday at 06:08 PM by AJaromir

[Saxman]

2 hours ago, felixx75 said:

Water injection is activated when the throttle lever is pushed all the way forward (over the deten, all the way to the front).

It's SUPPOSED to be tied directly to the throttle, but that's now how it is in the module. M3 made it a separate key press. And if he's only getting 54in MAP at 20,000ft he's NOT on ADI.

Edited 23 hours ago by Saxman

[Nealius]

Warbird dumbo here, what is "ADI" in these contexts? It certainly isn't Attitude Display Indicator...

[felixx75]

9 hours ago, Saxman said:

M3 made it a separate key press

I dare to doubt that and will only believe it when you show me where they confirm this exactly. If it really only gets 54MP at 20k ft, then something is fundamentally wrong. At sea level, you can get 57.5 without any problems and without pressing an extra button.

So if M3 really did implement it the way you think they did, there must be a confirmation somewhere from M3 (which I don't believe, because I don't see any change when I press this button at full throttle - how could I, since the water injection is already activated at full throttle), otherwise it is quite reasonable to assume that M3 implemented it realistically.

[Vladinsky]

20 minutes ago, felixx75 said:

I dare to doubt that and will only believe it when you show me where they confirm this exactly. If it really only gets 54MP at 20k ft, then something is fundamentally wrong. At sea level, you can get 57.5 without any problems and without pressing an extra button.

So if M3 really did implement it the way you think they did, there must be a confirmation somewhere from M3 (which I don't believe, because I don't see any change when I press this button at full throttle - how could I, since the water injection is already activated at full throttle), otherwise it is quite reasonable to assume that M3 implemented it realistically.

Easy to test, how long can you run full throttle before the 3 minutes remaining light turns on if you don't press the water injection on keybind?

[AJaromir]

1 hour ago, Nealius said:

Warbird dumbo here, what is "ADI" in these contexts? It certainly isn't Attitude Display Indicator...

Anti Detonation Injection - Its main purpose is to prevent engine knocking ( detonation combustion ) and premature ignition. At low altitudes it has secondary effect of increasing manifold pressure ( cool air = more dense ) Principle is: Water has the highest specific heat capacity of all common substances 4180 J/(kg·K).  But that's not the most important thing. The most important thing is that in order for water to turn into steam, it needs an additional 2257 kJ/kg of heat. This allows it to cool the engine much more efficiently than a rich fuel mixture, because aviation fuel has almost half the specific heat capacity of water.

In my opinion it is not simulated yet. Because I think there should be "jump" in power at low altitudes, just like in P-47.

Edited 12 hours ago by AJaromir

[AJaromir]

12 hours ago, Saxman said:

It's SUPPOSED to be tied directly to the throttle, but that's now how it is in the module. M3 made it a separate key press. And if he's only getting 54in MAP at 20,000ft he's NOT on ADI.

First of all. I did not use full throttle. At second test I did not use high blower. You can see it in the screenshot. The green line.

Edited 10 hours ago by AJaromir

[captain_dalan]

6 hours ago, felixx75 said:

I dare to doubt that and will only believe it when you show me where they confirm this exactly. If it really only gets 54MP at 20k ft, then something is fundamentally wrong. At sea level, you can get 57.5 without any problems and without pressing an extra button.

So if M3 really did implement it the way you think they did, there must be a confirmation somewhere from M3 (which I don't believe, because I don't see any change when I press this button at full throttle - how could I, since the water injection is already activated at full throttle), otherwise it is quite reasonable to assume that M3 implemented it realistically.

Never the less, it is so. From day one. I think I read about somewhere from a 2nd party that it's a design choice. Regardless, just try it yourself. Push the throttle all the way forward. The green light for 3 minutes of water injection left, never turns on. Press the enable water injection binding, you get extra knots of airspeed immediately (about 9 at sea level), and after a while, the green light does turn on.

The two screenshots bellow are taken with water injection off and on respectively:

null

5 hours ago, AJaromir said:

Anti Detonation Injection - Its main purpose is to prevent engine knocking ( detonation combustion ) and premature ignition. At low altitudes it has secondary effect of increasing manifold pressure ( cool air = more dense ) Principle is: Water has the highest specific heat capacity of all common substances 4180 J/(kg·K).  But that's not the most important thing. The most important thing is that in order for water to turn into steam, it needs an additional 2257 kJ/kg of heat. This allows it to cool the engine much more efficiently than a rich fuel mixture, because aviation fuel has almost half the specific heat capacity of water.

In my opinion it is not simulated yet. Because I think there should be "jump" in power at low altitudes, just like in P-47.

There is a jump in power, or at the very least, airspeed. Look at the images above