Lavochkin La-5 Clmax

[Holtzauge]

The in-game Clmax performance for various fighters has been discussed in a number of threads and attached is a figure I got from a friend which I believe has Clmax data for the La-5 and I hope this could serve as a starting point for a fruitful discussion of how the in-game La-5 performs in this arena. Unfortunately, my Russian language skills suck so I’m appealing to some kind soul in the forum to translate it for us.

 

Learning from the recently closed Yak thread, please limit input here to the La-5, both with reference to historical data and in-game performance. Both the Yak, Me-109 and Fw-190 Clmax deserves to be covered as well but do that in an appropriate thread and I’m appealing to the moderators to remove any content related to the other fighters from this thread to keep it from derailing.

 

[Crump]

That is the propeller on and propeller off polars for the La-5.

 

It is missing some required information about specifics of the conditions because the page is cut off.

 

The highest polar represent power on conditions.

 

The largest CLmax (~1.85) was obtained at Full Emergency Power, cowl flaps open and slats Free.

 

The next CLmax (~1.75) was obtained at Nominal Power, Cowl flaps open and slats free...

 

The three lower polars are the propeller off polars.

 

1.  Cowl Flaps Open, Slats Free (CLmax ~1.3)

 

2. Cowl Flaps Closed, Slats Free (CLmax ~1.29-1.32)

 

3.  Cowl Flaps Closed, Slats Closed (Clmax ~1.25)

[Crump]

Is there something you wanted to discuss on this?  Perhaps compare some infinite wing data to the 3D wing data under the same Reynolds number???

 

It is not much use without that topic being covered, LOL!

You will find the complete airplane gives good agreement with the infinite wing airfoil data.  That is kind of the basis for aeronautical engineering but you already know that, right??