s ▁high ▁pressure ▁air ▁over ▁the ▁control ▁surfaces ▁in ▁order ▁to ▁improve ▁their ▁effect iveness ▁during ▁slow ▁flight . ▁It ▁was ▁tested ▁on ▁a ▁NC - 1 3 0 B ▁prototype ▁aircraft ▁with ▁a ▁pair ▁of ▁T - 5 6 ▁tur b ines ▁providing ▁high ▁pressure ▁air ▁through ▁a ▁du ct ▁system ▁to ▁the ▁control ▁surfaces ▁and ▁f laps ▁during ▁landing . ▁This ▁greatly ▁reduced ▁landing ▁speed ▁to ▁just ▁ 6 3 ▁kn ots , ▁and ▁cut ▁landing ▁distance ▁in ▁half . ▁The ▁system ▁never ▁entered ▁service ▁because ▁it ▁did ▁not ▁improve ▁take off ▁performance ▁by ▁the ▁same ▁margin , ▁making ▁the ▁landing ▁performance ▁point less ▁if ▁the ▁aircraft ▁could ▁not ▁also ▁take ▁off ▁from ▁where ▁it ▁had ▁land ed . ▁ ▁An ▁electronic ▁reconna issance ▁variant ▁of ▁the ▁C - 1 3 0 B ▁was ▁designated ▁C - 1 3 0 B - II . ▁A ▁total ▁of ▁ 1 3 ▁aircraft ▁were ▁converted . ▁The ▁C - 1 3 0 B - II ▁was ▁distinguished ▁by ▁its ▁false ▁external ▁wing ▁fuel ▁t anks , ▁which ▁were ▁dis gu ised ▁signals ▁intelligence ▁( SI G INT ) ▁receiver ▁anten nas . ▁These ▁pod s ▁were ▁slightly ▁larger ▁than ▁the ▁standard ▁wing ▁t anks ▁found ▁on ▁other ▁C - 1 3 0 B s . ▁Most ▁aircraft ▁featured ▁a ▁swe pt ▁bla de ▁anten na ▁on ▁the ▁upper ▁fus el age , ▁as ▁well ▁as ▁extra ▁wire ▁anten nas ▁between ▁the ▁vertical ▁fin ▁and ▁upper ▁fus el age ▁not ▁found ▁on ▁other ▁C