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Old 13 September 2009, 03:38 PM   #17 (permalink)
Kwiatek
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Join Date: Sep 2009
Posts: 10
 
Thx All for these intetesting post.

I still think over Pflaz handling and stall characteristic.

As i wrote in my first post :

"The D.III slipped in turns, leading to crashes when unwary pilots turned at very low altitudes. Moreover, the Pfalz stalled sharply and spun readily. Recovery from the resulting flat spin was difficult, though some pilots took advantage of this trait to descend quickly or evade enemy aircraft"

Pflaz IIIA has better wingloading, powerloading and Clmax then Albatros and similar to the Fokker DVII"

Here are CLmax for these planes :

1.462 - Pfalz D.IIIa
1.370 - Fokker D.VII
1.313 - Albatros D.V

Analyzing Pflaz wing airfoil i see that even if it get high critical AoA ~ 16 deg. it lose very quickly lift without so much warning and has sharp polar Clmax/AoA. From charts it look that e.x Fokker airfoil get critical AoA ~ 17 deg but also has much more gentle polar. Albatros airfoil get lower critical AoA ~ 14,5 deg but also polar is more gentle then Pflaz. Also longer wingspan of Plfaz DIII could result worse roll rate and the same worse manouverbility in change directions of flight."

Could be that Albatros was easier to fly and has better stall and spin characteristic then Pflaz? It could be that even modificated Pflaz DIIIa with more horsepower engine and larger rudder keep bad stall characteristic of his older brother? Both of them have the same wing profile and airfoil which could case such bad characteristic at high angle of attack?

So in hand of experience pilot it could do better then Albatros but with novice pilot it could make more problems in handling, turn and combat situation?
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