Engine Power/Aircraft Speed

[Hayrake YE-ZB]

14 minutes ago, felixx75 said:

I find it astonishing that hardly anyone seems to use the “slider” option. It is only logical to use “slider” for all axis that do not use a center point and “+” and “-” (Pitch, Roll, Yaw for example) but go from “0” to “100”. Throttle or brakes, for example, are such a case, rotary controls, etc. I have been using the “slider” option for this type of axis for years.

When I first set up controls on a Thrustmaster WH throttle, the cockpit prop control would reverse halfway through the throttle range. Checking slider solved it. Subsequent to that, I also calibrated the WH in game controllers, so that could have been the problem as well. It’s a matter of how the control coding is set up to handle the different types of axis I guess.

[Templar560]

17 minutes ago, felixx75 said:

I find it astonishing that hardly anyone seems to use the “slider” option. It is only logical to use “slider” for all axis that do not use a center point and “+” and “-” (Pitch, Roll, Yaw for example) but go from “0” to “100”. Throttle or brakes, for example, are such a case, rotary controls, etc. I have been using the “slider” option for this type of axis for years.

Yeah. tbh I never got into what it was. I can't bind that prop lever to anything anyway, but maybe it does if you turn into a slider. I've got some sliders on one of my peripherals that i use in the Hornet and use for Prop levers in the Mosquito.

[Padonis]

I have everything correctly assigned, but the water injection operation is not visible, the limiting wire is broken at the entrance to the plane at the airport. In a word, the water injection does not work.

[felixx75]

1 hour ago, Templar560 said:

Yeah. tbh I never got into what it was. I can't bind that prop lever to anything anyway, but maybe it does if you turn into a slider. I've got some sliders on one of my peripherals that i use in the Hornet and use for Prop levers in the Mosquito.

As I said, everything that has no center and goes “+” and “-” (Pitch: up/center/down, Roll: left/center/right) is a “slider” (Throttle 0-100%, Brakes 0-100% etc.). So I would set all such axis as “sliders”, which I have been doing for years with all modules.

1 hour ago, Padonis said:

I have everything correctly assigned, but the water injection operation is not visible, the limiting wire is broken at the entrance to the plane at the airport. In a word, the water injection does not work.

The F4U has no display, control light, visible switch or similar for the water injection, so it is currently very difficult to find out whether this is implemented at all and if so, whether it works properly. Unfortunately, the safety wire is not animated (as in the P-51, for example), but there is an animated detent. if you exceed this, the water injection should actually be activated.

Edited Wednesday at 09:12 PM by felixx75

[Templar560]

11 minutes ago, felixx75 said:

As I said, everything that has no center and goes “+” and “-” (Pitch: up/center/down, Roll: left/center/right) is a “slider” (Throttle 0-100%, Brakes 0-100% etc.). So I would set all such axis as “sliders”, which I have been doing for years with all modules.

The F4U has no display, control light, visible switch or similar for the water injection, so it is currently very difficult to find out whether this is implemented at all and if so, whether it works properly. Unfortunately, the safety wire is not animated (as in the P-51, for example), but there is an animated detent. if you exceed this, the water injection should actually be activated.

Cool I shall give it a try! Thanks!

[tekwoj]

There is no water injection, there's also no reason at the moment to respect the "do not exceed" limits as long as you pay attention to the temperature. I was flying low lever at 2700 RPM and Manifold at 60+ for a long time and nothing broke. Mixture at auto-rich helps cooling down engine to the point it's fine even with all cooling closed or almost closed.

[Saxman]

1 hour ago, felixx75 said:

As I said, everything that has no center and goes “+” and “-” (Pitch: up/center/down, Roll: left/center/right) is a “slider” (Throttle 0-100%, Brakes 0-100% etc.). So I would set all such axis as “sliders”, which I have been doing for years with all modules.

The F4U has no display, control light, visible switch or similar for the water injection, so it is currently very difficult to find out whether this is implemented at all and if so, whether it works properly. Unfortunately, the safety wire is not animated (as in the P-51, for example), but there is an animated detent. if you exceed this, the water injection should actually be activated.

There is the 3-minute warning light which comes on, and I've gotten twice. However I've not seen any change in power.

So I think the underlying coding may be there, it just no workee.

[felixx75]

9 minutes ago, Saxman said:

There is the 3-minute warning light which comes on, and I've gotten twice. However I've not seen any change in power.

So I think the underlying coding may be there, it just no workee.

What were your engine settings at that time? Manifold, blower, altitude,...?

20 minutes ago, tekwoj said:

There is no water injection

This is clearly not true, as Saxman has triggered the 3 minute warning light (see the post below yours). I.e. water injection is implemented, but the question is whether it works properly.

Edited Wednesday at 10:21 PM by felixx75

[Saxman]

1 hour ago, felixx75 said:

What were your engine settings at that time? Manifold, blower, altitude,...?

This is clearly not true, as Saxman has triggered the 3 minute warning light (see the post below yours). I.e. water injection is implemented, but the question is whether it works properly.

Max throttle and RPM, Low Blower, ranging from 10,000ft to the deck.

[lawndartleo]

8 hours ago, felixx75 said:

I find it astonishing that hardly anyone seems to use the “slider” option. It is only logical to use “slider” for all axis that do not use a center point and “+” and “-” (Pitch, Roll, Yaw for example) but go from “0” to “100”. Throttle or brakes, for example, are such a case, rotary controls, etc. I have been using the “slider” option for this type of axis for years.

Yes it “makes sense” but plenty of things work just fine as an “axis” so it is an easy oversight.

[Padonis]

If there is water injection, it shows nothing, no power increase, no RPM increase, absolutely nothing. Yesterday I was flying at full throttle 2700 and boost over 50. Lever at 100% for almost two hours. The water indicator light did not light up even for a second. I don't know what mate Saxman lit or how, but I and many others somehow fail to do it.

[felixx75]

4 hours ago, Saxman said:

Max throttle and RPM, Low Blower, ranging from 10,000ft to the deck.

The manifold pressure at the appropriate altitude would have been important. Because you could use this to see whether the water injection is working or not.

45 minutes ago, Padonis said:

If there is water injection, it shows nothing, no power increase, no RPM increase, absolutely nothing. Yesterday I was flying at full throttle 2700 and boost over 50. Lever at 100% for almost two hours. The water indicator light did not light up even for a second. I don't know what mate Saxman lit or how, but I and many others somehow fail to do it.

https://forum.dcs.world/topic/375234-engine-poweraircraft-speed/page/4/#findComment-5662242

[Mike Busutil]

So officially, what is the correct engine chart we should reference here?

• R-2800-8W?
• R-2800-8?

Edited 14 hours ago by Mike Busutil

[felixx75]

1 minute ago, Mike Busutil said:

R-2800-8W

This - the "W" stands for "Water Injection"

[tekwoj]

1 hour ago, Mike Busutil said:

So officially, what is the correct engine chart we should reference here?

• R-2800-8W?
• R-2800-8?

 

 

According to textures in the cockpit we have the R-2800-8 without water injection.

Edited 12 hours ago by tekwoj

[tekwoj]

21 hours ago, felixx75 said:

What were your engine settings at that time? Manifold, blower, altitude,...?

This is clearly not true, as Saxman has triggered the 3 minute warning light (see the post below yours). I.e. water injection is implemented, but the question is whether it works properly.

What light are you talking about? The carburetor air temp light? How does that prove the water injection?

[felixx75]

13 minutes ago, tekwoj said:

According to textures in the cockpit

What do the textures have to do with it...?

Only the F4U-1A (B = British 1A ,C = A but with 20mm cannons) had no water injection. The F4U-1D had water injection.

In the picture you can see the indicator light I described... It's just in the middle of the dashboard, you can easily overlook it...

[Saxman]

1 hour ago, felixx75 said:

What do the textures have to do with it...?

Only the F4U-1A (B = British 1A ,C = A but with 20mm cannons) had no water injection. The F4U-1D had water injection.

In the picture you can see the indicator light I described... It's just in the middle of the dashboard, you can easily overlook it...

The water injection was first introduced in the 1A, serial numbers 55910, (Vought) 13992, (Goodyear) and 11208 (Brewster). The system was also retrofit onto aircraft already in the field as possible so you can't rely on serials alone. The only model Corsair that to my knowledge never received water injection were the Birdcages since those machines were already being withdrawn from front line service by the time it was introduced.

[tekwoj]

2 hours ago, felixx75 said:

What do the textures have to do with it...?

 

In the cockpit take a look at the left wall. Engine is R-2800-8, though the plaque makes not much sense in terms of serial number.

Edited 9 hours ago by tekwoj

[felixx75]

46 minutes ago, tekwoj said:

In the cockpit take a look at the left wall. Engine is R-2800-8m though the plaque makes not much sense in terms of serial number.

Yes, I had already noticed that. So that's either a wrong board, or we don't have an F4U-1D at all... Because all D's had water injection and the table R-2800-8W shows the data for the version with water injection, but the label shows values without.

In the end, only a Dev can really clear this up. @-Rudel-

Edited 10 hours ago by felixx75

[Mike Busutil]

This is why I asked for official confirmation. Right now we have conflicting data and I would like to ensure my checklist is using the correct mixture settings as one calls for Auto lean and the other calls for auto rich. 

[felixx75]

9 minutes ago, Mike Busutil said:

This is why I asked for official confirmation. Right now we have conflicting data and I would like to ensure my checklist is using the correct mixture settings as one calls for Auto lean and the other calls for auto rich. 

I'm pretty sure that the plate in the cockpit is wrong. The F4U-1D has water injection and therefore "Auto Lean" is always used except for take-off (and landing).

[Mike Busutil]

Agreed.

[tekwoj]

The manual for module doesn't specify mixture but the  MIL max time according to it is 5 minutes. With 2800-8w it would have been 30 minutes.

That said it's not really important, you can run either, rich will be less hot, meaning you can close coolers and get good speed. Unless you need fuel economy just go for rich until the engine is no longer WIP.

[felixx75]

4 hours ago, tekwoj said:

The manual for module doesn't specify mixture but the  MIL max time according to it is 5 minutes. With 2800-8w it would have been 30 minutes.

That said it's not really important, you can run either, rich will be less hot, meaning you can close coolers and get good speed. Unless you need fuel economy just go for rich until the engine is no longer WIP.

I haven't noticed any difference in temperature between Auto Rich and Auto Lean so far, as temperature management is still WIP anyway. But when the engine is simulated accordingly, I stick to the recommended specifications and then also use Auto Lean for everything except take-off and landing.