P-38 dive flaps produce no drag

[GScholz]

Of course. What I meant was that the numbers showing the actual speed didn't change.

And why is that relevant?

[GScholz]

This discussion is silly.  True purveyors of twin engine pwnage fly the J or the G.   

Nah. Real men fly the one-ten... 

[nrshida]

Nah. Real men fly the one-ten... 

http://www.youtube.com/watch?v=KMy1zO8m8sM&feature=player_detailpage#t=25

[GScholz]

 

[nrshida]

 

[FLS]

And why is that relevant?

You're assuming a speed change and neglecting air density.

[GScholz]

You're assuming a speed change and neglecting air density.

This game does not model turbulence or any variations in air density, except with altitude. In level flight if IAS changes, then inevitably so does TAS. If his IAS is 331.4 mph and his TAS is 334.1 the readout will be 331 IAS and 334 TAS. When his IAS increases by 0.2 mph his IAS will be 331.6 and a TAS of 334.3. Since the readout does not show the decimals it will read 332 IAS and 334 TAS.

[FLS]

IAS will also change if he loses a little altitude. Altitude is not shown in the second screenshot. Which is more likely, increased speed from not adding drag or increased IAS from flying at the altitude where the decimal rounding changes?

[GScholz]

The latter, since he's on auto pilot. And it is not the altitude that changes decimal rounding, but his continued acceleration. His speed had obviously not completely stabilized yet.

[FLS]

The latter, since he's on auto pilot. And it is not the altitude that changes decimal rounding, but his continued acceleration. His speed had obviously not completely stabilized yet.

So we agree the screen shots don't illustrate any part of this discussion?   

[GScholz]

No we don't agree. The screenshots show that despite lowering two large flaps into the under-wing airflow the aircraft continued accelerating, even at the very edge of its top speed.

Are you just trolling now?

[FLS]

We already know the dive flaps don't add drag in subsonic flight in AH. No one claimed that they do.

[GScholz]

Then why carry on this nonsense about the TAS not increasing?

Also please stop calling it "subsonic flight" or "supersonic flight". The P-38 is always subsonic. Localized supersonic airflow does not mean the aircraft is in supersonic flight.

[FLS]

Then why carry on this nonsense about the TAS not increasing?

I responded to Ammo's post, then you asked me about it. 

And yes I do mean airflow.

The question I'd like to see answered is how much drag should the dive flaps add. So far I'm the only one posting test data to support your position.

[FLS]

According to this article in Aviation News from 1945 the P-47 dive flaps had an extension angle of 21 degrees.  In AH it opens to 90 degrees. I hope that will be adjusted along with the P-38L.                 

http://legendsintheirowntime.com/Content/1945/P47_Av_4502_dive-flap.html