Need help with special testing project

[ACG_KaiLae]

Hello all, I have an unusual request. I'm attempting to check into the P-40 flight model for possible issues (https://forum.il2sturmovik.com/topic/25323-p-40-turn-rateflight-model-check/). We have begun testing the aircraft to see if the correct lift coefficient was used. However, we've run into an issue. In order to get good comparison data, we need to know the exact speed of the aircraft during testing. This is not the same thing as indicated speed, but can vary with altitude. For the RL aircraft, we have data that should allow us to get good baseline data. However, with the in game plane, we would either need to know exactly how the game simulates the speedometer in the aircraft (pitot tube simulation), which we don't know, or we could lay out a test track by designing a mission where we have an object of a known distance, fly the plane between them, and exactly time how long it takes to go from A to B.

 

Since information on the pitot tube would rely on 1CG giving us that, and I don't know when or if they will, I've decided until a better way comes along to go with plan B. Which...is a slight problem. I have no knowledge of the mission editor. Zip. Zero. Nada. So, how do I create such a thing? 

 

Or perhaps some kind soul here might be willing to whip something applicable up for us?

[KG200_Volker]

OK, see if this one (as a starter) help you. 3 Airports, airstart at 150-500-1500 m. heading 90, at 3km from start a balloon, and two more 5km apart from each other.

 

https://www.dropbox.com/s/7iq76wd87v1jkp8/P40%20test%20mis.7z?dl=0

[ACG_KaiLae]

Had to get some clarification. From what I can tell I didn't understand the requirements entirely correctly before; please read:

 

https://forum.il2sturmovik.com/topic/25323-p-40-turn-rateflight-model-check/?p=417390

 

Can this be done?

[KG200_Volker]

Ask JtD what atmospheric conditionals he wants.The mission that I gave you has 25 C temp, no wind and 760 mmhg pressure.

 

The airports are at  A:150m  B:500m C:1500m above see level. You start with a course of 90 deg, after 3km you ll pass the first balloon, the second one is exactly 5km away, and the third one another 5km.(just a few meters of deviation between them).

 

You can record tracks to be more precise for time/distance calculations. Test whith this one and then tell me what more you need, e.g. more balloons, greater distances, other heights etc.

[ACG_KaiLae]

Will do I have pmed him this thread

[JtD]

Sea level conditions in standard atmosphere are 760mm and 15°C. You can set that in the ME, but if you want to fly at that altitude, you'd just keep crashing into the trees.

 

If you set temperature to 21.5° and pressure 854.5mm you'll have sea level conditions at 1000m above the ground and can fly there.

 

You can use this tool for setting up atmospheric condtions to your likings: https://www.digitaldutch.com/atmoscalc/

 

You won't find the mm there, but 1atm=760mm, and you can go by this.

[KG200_Volker]

ME accepts pressure up to 810 but it also has a height setting, so i ve set in this mission 1000m / 760mm / 15C.

 

I replaced balloons with land fires so you can measure with greater detail. Upon start first fire 3km away and 4 more every 5km (exact distances down to 1 meter). Air-starts for 150 / 500 /1000 /1500m.

 

https://www.dropbox.com/s/k1ndgsl6a8rhle2/P%2040%20Testing.7z?dl=0

[ACG_KaiLae]

Ok, so just checking, at 1000m in the mission you have, the ambient pressure is 760mm and temperature is 15c? And thanks for the help, much appreciated, will be useful going forward in several areas. 

[KG200_Volker]

Ok, so just checking, at 1000m in the mission you have, the ambient pressure is 760mm and temperature is 15c? And thanks for the help, much appreciated, will be useful going forward in several areas.

 

Yes, if the "height" setting works correctly in ME.

[ACG_KaiLae]

Thanks a bunch, will get on this as soon as I have some time; will let you know how it goes