▁safety ▁concerns . ▁While ▁the ▁Bon anza ▁met ▁the ▁initial ▁cert ification ▁requirements , ▁it ▁had ▁a ▁history ▁of ▁fatal ▁mid - air ▁break ups ▁during ▁extreme ▁stress , ▁at ▁a ▁rate ▁exceed ing ▁the ▁accepted ▁norm . ▁The ▁type ▁was ▁de emed ▁air worth y ▁and ▁restrictions ▁removed ▁after ▁Be ech craft ▁issued ▁a ▁struct ural ▁modification ▁as ▁an ▁Air worth iness ▁Direct ive . ▁ ▁V - ta iled ▁aircraft ▁require ▁longer ▁rear ▁fus el ages ▁than ▁aircraft ▁with ▁conventional ▁emp enn ages ▁to ▁prevent ▁y aw ing . ▁This ▁t endency , ▁called ▁" sn aking ", ▁was ▁apparent ▁on ▁taking ▁off ▁and ▁landing ▁on ▁the ▁F oug a ▁C M . 1 7 0 ▁Mag ister , ▁which ▁has ▁a ▁relatively ▁short ▁fus el age . ▁ ▁Rud der v ators ▁ ▁Rud der v ators ▁are ▁the ▁control ▁surfaces ▁on ▁an ▁air plane ▁with ▁a ▁V - tail ▁configuration . ▁They ▁are ▁located ▁at ▁the ▁trailing ▁edge ▁of ▁each ▁of ▁the ▁two ▁air fo ils ▁making ▁up ▁the ▁tail ▁of ▁the ▁plane . ▁The ▁first ▁use ▁of ▁rud der v ators ▁may ▁have ▁been ▁on ▁the ▁Co and ă - 1 9 1 0 ' s ▁X - tail , ▁although ▁there ▁is ▁no ▁proof ▁that ▁the ▁aircraft ▁ever ▁fle w . ▁The ▁later ▁Co and ă - 1 9 1 1 ▁fle w ▁with ▁rud der v ators ▁on ▁its ▁X - tail . ▁Later ▁Polish ▁engineer ▁Jer zy ▁Rud lick i ▁designed ▁the ▁first ▁practical ▁rud