Actually if you want a good comparisson to the flight manual data then it would be worth creating a quick mission with a parameter changed which brings atmosphere to standard, look for Breeze/Thermal factor in the mission parameters in FMB and set it to 0, if the performance is off under those conditions then we know there is a problem.

That might be a map-wise setting, hard-coded lke we used to see in 1946. Be interesting to test if/when BoM comes out.

did you check that thread I mentioned? the Breeze/thermal factor slider in mission parameters in the FMB changes the temparatures and set it to 0 you get pretty much standard conditions, with further experimentation I'd like to find out if there is a way to get ISA - conditions.

That is one of the details I really like about the sim too.

The best thing is the mindset it forces upon a player. You have to keep a scan going even during a dogfight and above all "fly the plane". That fact alone makes it a better simulation than anything to date.

Actually it is the fact the engine supercharger can produce boost that can damage it.

It would be pilot error though as if the POH instructions are followed, it will not occur.

You don't lean an aircraft engine in a climb below ~5000 ft Density altitude. Leaning can cause detonation.

In a supercharged engine, the supercharger keeps the density altitude in the manifold low below FTH and below 5000 ft for all or a portion above it depending on the specifics.

For example, in the Spitfire you are instructed to leave the mixture control in NORMAL. It has a WEAK setting and if used, the POH instructs that the boost is limited to 3 1/2 lbs except for short periods.

If you tried to climb at the normal climb rating in WEAK mixture, you could cause detonation and destroy the engine.

I did, yes.

What I meant was that, perhaps the slider in FMB allows us to change the pressure in the relative sense.

I.e. The difference between 0 and 10 on that slider might not produce ~ISA and ISA+10 on a different map, which is what I meant by "map-wise setting" ;)

It will be nice in a couple of years to if/when we get some FMB documentation.

We know the lapse rate is 1.98C/1000ft, right?

Set the altimeter to field elevation and read the window to get pressure. It is close enough.

Have someone spawn with an aircraft that has an OAT gauge and read the temp at that field elevation.

You have the data required to convert the performance for that map.

Ultimately I think you are right on that one, the sliders effect is probably coincidental, it really seems geared around some basic enviromental effects, you can set layers or bands of the effect at varying altitudes, my guess it is just for simulating turbulence at varying levels and the associated air temparature mixing.

No it is the weight of the aircraft configuration you are flying.

Note the weight of the plane @ take off and not "maximum take off weight" as per the POH.

So this control slider does not exist to set conditions to standard?

What needs to happen is a plane with and OAT takes some readings at altitude.

Then you know for sure.