▁bl imp ▁that ▁was ▁being ▁assemble d ▁from ▁a ▁dis used ▁en velope ▁and ▁a ▁spare ▁SS ▁Zero ▁car . ▁Pet rol ▁f umes ▁from ▁a ▁sp ill age ▁in ▁the ▁car ▁were ▁ign ited ▁some ▁time ▁later ▁by ▁a ▁spark ▁when ▁the ▁radio ▁equipment ▁was ▁being ▁tested ; ▁and ▁the ▁en su ing ▁fire ball , ▁fed ▁by ▁fuel ▁and ▁gas , ▁completely ▁en velop ed ▁and ▁destroyed ▁both ▁craft . ▁Although ▁the ▁hang ar ▁itself ▁surv ived , ▁one ▁air man ▁lost ▁his ▁life , ▁and ▁two ▁further ▁bl im ps ▁that ▁were ▁mo ored ▁nearby , ▁SS Z . 3 8 ▁and ▁SS Z . 5 4 , ▁were ▁also ▁destroyed . ▁ ▁R 2 9 ▁R 2 9 ▁was ▁constructed ▁by ▁Arm strong ▁Whit worth ▁A ircraft ▁at ▁Bar low , ▁North ▁York shire , ▁and ▁was ▁commission ed ▁on ▁ 2 0 ▁June ▁ 1 9 1 8 . ▁She ▁was ▁based ▁at ▁the ▁East ▁Fort une ▁R N AS ▁air ship ▁station ▁in ▁East ▁L oth ian , ▁Scotland , ▁where ▁her ▁oper ational ▁career ▁last ed ▁less ▁than ▁five ▁months . ▁During ▁this ▁time ▁she ▁fle w ▁for ▁ 3 3 5 ▁hours , ▁covered ▁an ▁estimated ▁, ▁and ▁became ▁the ▁most ▁successful ▁British ▁w art ime ▁" rig id ". ▁ ▁She ▁carried ▁out ▁a ▁number ▁of ▁extensive ▁pat rol s ▁including ▁one ▁last ing ▁over ▁ 3 0 ▁hours , ▁and ▁two ▁others ▁for ▁more ▁than ▁ 2 0 ▁hours . ▁She ▁encountered ▁German