slow p47

[P40eWarhawk]

so i think the p 47 comes off really badly in this sim... its really a flying brick and the 50 cals seem to do not as much dmg as they could. (but 20mm are just better and its not like they are peashooters like smaller calibers so i think this is fine). what bothers me the most is the slow speeds at high altitudes at 9000m i only get at 250 mph max of the promised over 300 true airspeed i varied prop rpm fuelloads and even stripped off machineguns to get more speed. am i doing something  wrong or is this sim just kicking the p 47??

[Barnacles]

18 minutes ago, P40eWarhawk said:

so i think the p 47 comes off really badly in this sim... its really a flying brick and the 50 cals seem to do not as much dmg as they could. (but 20mm are just better and its not like they are peashooters like smaller calibers so i think this is fine). what bothers me the most is the slow speeds at high altitudes at 9000m i only get at 250 mph max of the promised over 300 true airspeed i varied prop rpm fuelloads and even stripped off machineguns to get more speed. am i doing something  wrong or is this sim just kicking the p 47??

250 IAS at 9000m is way above 300mph TAS I think

[DD_Arthur]

22 minutes ago, P40eWarhawk said:

so i think the p 47 comes off really badly in this sim... its really a flying brick and the 50 cals seem to do not as much dmg as they could. (but 20mm are just better and its not like they are peashooters like smaller calibers so i think this is fine). what bothers me the most is the slow speeds at high altitudes at 9000m i only get at 250 mph max of the promised over 300 true airspeed i varied prop rpm fuelloads and even stripped off machineguns to get more speed. am i doing something  wrong or is this sim just kicking the p 47??

Did you enable the turbo-supercharger?

[Barnacles]

I went in the game and tested.

I got 430kmh at 9000m, which (if I've used the TAS conversion properly) is 675kmh or 419mph TAS 

 See this video for the exact control inputs.

Inlets were 50% and mixture 85%, all others you can see in the tech chat.

Edited August 17, 2020 by 71st_AH_Barnacles

[Barnacles]

For context a k4 at 100% throttle gets 423kmh

 

 

 

Edited August 17, 2020 by 71st_AH_Barnacles

[PainGod85]

2 hours ago, P40eWarhawk said:

so i think the p 47 comes off really badly in this sim... its really a flying brick and the 50 cals seem to do not as much dmg as they could. (but 20mm are just better and its not like they are peashooters like smaller calibers so i think this is fine). what bothers me the most is the slow speeds at high altitudes at 9000m i only get at 250 mph max of the promised over 300 true airspeed i varied prop rpm fuelloads and even stripped off machineguns to get more speed. am i doing something  wrong or is this sim just kicking the p 47??

 

Speeds documented during flight performance tests are always in True Airspeed (TAS), that is, the speed of the plane through the air. Speed limitations are in Indicated Airspeed (IAS), as the only time IAS and TAS give you the same speed readings is at reference air pressure - at sea level. The further you climb, the more IAS lags behind TAS, as there's simply less air impinging on the measuring devices inside your pitot tube.

However, IL-2 does not, to my knowledge, model instrument error, so what you see in the cockpit is actually Calibrated Airspeed (CAS), meaning measuring errors due to position error etc do not exist in the sim, so it's comparatively easy to tabulate actual TAS at any given altitude.

 

(Strictly speaking this also means that flight limitations expressed in IAS need to have their error values added to actually arrive at IAS from the CAS displayed on the cockpit instruments.)

[P40eWarhawk]

5 hours ago, 71st_AH_Barnacles said:

250 IAS at 9000m is way above 300mph TAS I think

i had a hunch but im a bit confused because firstly the 109f4 followed me and the calculater i found set it at 440mph which is too fast haha is it modeled correctly  in the game?

 

5 hours ago, DD_Arthur said:

Did you enable the turbo-supercharger?

yes i did forgot to mention

3 hours ago, PainGod85 said:

 

Speeds documented during flight performance tests are always in True Airspeed (TAS), that is, the speed of the plane through the air. Speed limitations are in Indicated Airspeed (IAS), as the only time IAS and TAS give you the same speed readings is at reference air pressure - at sea level. The further you climb, the more IAS lags behind TAS, as there's simply less air impinging on the measuring devices inside your pitot tube.

However, IL-2 does not, to my knowledge, model instrument error, so what you see in the cockpit is actually Calibrated Airspeed (CAS), meaning measuring errors due to position error etc do not exist in the sim, so it's comparatively easy to tabulate actual TAS at any given altitude.

 

(Strictly speaking this also means that flight limitations expressed in IAS need to have their error values added to actually arrive at IAS from the CAS displayed on the cockpit instruments.)

so it does model it but not with most detail? i pulled up a online calcultor but the results of that would be way too good (over 440..)

4 hours ago, 71st_AH_Barnacles said:

I went in the game and tested.

I got 430kmh at 9000m, which (if I've used the TAS conversion properly) is 675kmh or 419mph TAS 

 See this video for the exact control inputs.

Inlets were 50% and mixture 85%, all others you can see in the tech chat.

well ok in this case i used conversion improperly then can you educate me because that would be about the speed i achieved (a hunch faster with 75 percent mixture and with the bubbletup though also stripped of all weight)

4 hours ago, 71st_AH_Barnacles said:

I went in the game and tested.

I got 430kmh at 9000m, which (if I've used the TAS conversion properly) is 675kmh or 419mph TAS 

 See this video for the exact control inputs.

Inlets were 50% and mixture 85%, all others you can see in the tech chat.

its still weird that the f4 followed me so long

[PainGod85]

430 kph CAS at 9000 m in a standard atmosphere comes down to around 675 kph TAS, or 419 mph according to this online calculator: https://aerotoolbox.com/airspeed-conversions/

 

Without knowing how you calculated things, it's impossible to know why and how you ended up at 440 mph.

[Barnacles]

53 minutes ago, P40eWarhawk said:

 

well ok in this case i used conversion improperly then can you educate me because that would be about the speed i achieved (a hunch faster with 75 percent mixture and with the bubbletup though also stripped of all weight)

its still weird that the f4 followed me so long

I used an online converter.

https://aerotoolbox.com/airspeed-conversions/

And used the speed from the BoX HUD to input into CAS.

The F4 should be a fair bit slower.

At max combat the f4 was 381kmh indicated rather than the 430kmh of the D22 p47.

In the D28 I got around 413kmh indicated which is a tiny bit over 255mph on the dial.

 

At max continuous in the D28 I got 395kmh indicated

At max power, I got the F4 up to 391kmh until I got "emergency mode exceeded", so if you weren't quite optimal on the D28 and the f4 was really going for it you could be closely matched with speeds.

Edited August 17, 2020 by 71st_AH_Barnacles

[Legioneod]

The P-47 is too slow above 23,000ft. Top speed should be pretty static up to a certain altitude.

 

P-47D-22 top speed at 29,000ft (8839m) was 443mph with design load, in game I have yet to reach this speed at 29,000ft.

P-47D-28 should be similar top speed at 29,000ft.

 

We are also getting less power than we should, currently we are only getting around 2000HP (52-53") at 29,000ft but we should be getting around 2220HP (56")

[P40eWarhawk]

On 8/17/2020 at 10:16 PM, 71st_AH_Barnacles said:

I used an online converter.

https://aerotoolbox.com/airspeed-conversions/

And used the speed from the BoX HUD to input into CAS.

The F4 should be a fair bit slower.

At max combat the f4 was 381kmh indicated rather than the 430kmh of the D22 p47.

In the D28 I got around 413kmh indicated which is a tiny bit over 255mph on the dial.

 

At max continuous in the D28 I got 395kmh indicated

At max power, I got the F4 up to 391kmh until I got "emergency mode exceeded", so if you weren't quite optimal on the D28 and the f4 was really going for it you could be closely matched with speeds.

well thats some thourough testing thx alot mate!