Yup i notice the same you can't outrun a hurri in a 109, if you start a shallow circle climb the hurri will catch you, if try to dive it will be sticked to yer tail.

I think your forum handle nails it pretty well :grin:

In case you believe they simulate the airflow around the plane I think it's safe to say:
They are not.
The fluid dynamics stimulation alone would kill your pc.

Well I would not jump to that conclusion just yet

Don't take this personal, but, based on past IL2 experience I found that most of the 'errors' in speed were due to the sim pilot, not the FM.

And it worked both ways

1) Guy says plane is too slow, graphing the data using DeviceLink it turned out the sim pilot was actually climbing (read not level flight)
2) Guy says plane is too fast, graphing the data using DeviceLink it turned out the sim pilot was actually diving (read not level flight)

Little changes in altitude like that can easily cause a +/-40mph error.. At least that was the case in IL-2 for sim pilots. A good example was back during the Ki-61 top speed topics, half said too fast half said too slow. Turns out the plane was fine it was the sim test pilot that was in error.

Now with that said, what real world data are you using as a reference, and what is the speed difference between fully open and fully closed? Ill bet if falls in and around the above mentioned error, thus until your able to log you altitude and speed and graph it, I would not jump to your conclusion.

i dont take it personal...but it should make a difference whether the rads are fully open or almost closed....the only difference it makes is that you can overheat your engine with the latter, but not in speed

S!

And maybe it does..

But it may be due to pilot error, or it maybe so small that it is beyond your ability to make note of it, hence the need to log the data.

With that said

I noticed you didn't list your real world data reference.. Is it safe to assume you have one? If so, how much difference in top speed are we talking about here?

10?
20?
30?
40?
50?

If it is less than 50, now take a look at the resolution of the cockpit gauges.. That alone can be a source of a good +/-20mph error.. Just another good reason to log the data

As it should

Maybe.. maybe not.. No real proof has been provided as of yet IMHO

S!

Well, Helmut Lipfert said the radiator flaps on his Bf109G slowed the plane down as much as 40-60km/h and used them sometimes to avoid passing a slower target. Anecdotal sure, but seems that the radiators would cause some extra drag thus less speed.

Just to be clear

I am not saying open rads should not cause more drag, and thus less speed

Far from!

All I am saying is that without logging the data, the sim pilot alone can cause a 40-60kph diff in speed. Thus the 'thing' you are looking for is in the noise of the human error.

Hi Dav,

I don't see the same here. Nearly closing fully the rads of my 109 is what give me the 500-kph.

Did you close the oil rad as well and fly the ball centered ? This does impact the speed by raising the drag dramatically IMHO

S!

so actually the fact that an hurricane is without really a big problem attached to the tail of an emil is because the emil pilots are not good pilots.
Sure.
I always knew that hopping on an hurricane i would have been a better pilot.