Low-speed flight investigation of an airplane with sweptback wings

Same of the s t a b i l i t y parameters of eweptback wings a r e considerably different from t h o ~e of conventional s t r a i g h t wings.In order t o determine how these different s t a b i l i t y parameters wocld affect the low-+peed f l y i n g q u a l i t i e s of an airplane, the Navy early i n 1946 authorized the Bell Aircraft Corporation t o modify two P-63 airplanes t o i n c o q o r a t e ewoptback wiws.The f i r s t figure shows a drawin& of the modified airylane, which i s d ~s i g n a t e d the Lr39 airplane.The outer w i x panel& a r e swept back 35 d o n 8 the quarter--chord l i n e .T b center sectLon, containing the cooling a i r intakes, is l o f t unchanged.The aain landing gear of the