▁the ▁then - new ly ▁opened ▁London ▁He ath row ▁Airport . ▁ ▁Lan cast rian ▁engine ▁test bed s ▁Data ▁from : ▁Av ro ▁A ircraft ▁since ▁ 1 9 0 8 ▁ ▁With ▁the ▁advent ▁of ▁gas ▁tur bine ▁engines ▁there ▁emer ged ▁a ▁need ▁to ▁test ▁the ▁new ▁engines ▁in ▁a ▁controlled ▁flight ▁environment ▁in ▁well ▁instrument ed ▁install ations . ▁An ▁ideal ▁candidate ▁emer ged ▁as ▁the ▁Av ro ▁Lan cast rian ▁which ▁could ▁easily ▁accommod ate ▁the ▁test ▁instrument ation ▁as ▁well ▁as ▁fly ▁on ▁the ▁power ▁of ▁two ▁p ist on ▁engines ▁if ▁required . ▁Several ▁Lan cast ri ans ▁were ▁allocated ▁for ▁engine ▁test - bed ▁work ▁with ▁tur bo jet ▁engines ▁replacing ▁the ▁outer ▁Mer lin ▁engines ▁or ▁test ▁p ist on ▁engines ▁in ▁the ▁inner ▁nac elles . ▁F uel ▁arrang ements ▁varied ▁but ▁could ▁include ▁k eros ene ▁jet ▁fuel ▁in ▁outer ▁wing ▁t anks ▁or ▁fus el age ▁t anks , ▁with ▁av gas ▁carried ▁in ▁remaining ▁fuel ▁t anks . ▁ ▁Acc idents ▁and ▁inc idents ▁ ▁The ▁A viation ▁Saf ety ▁Network , ▁part ▁of ▁the ▁Fl ight ▁Saf ety ▁Foundation , ▁records ▁ 2 3 ▁h ull ▁loss ▁acc idents ▁involving ▁the ▁Lan cast rian ▁occurr ing ▁between ▁ 1 9 4 6 ▁and ▁ 1 9 6 4 . ▁ ▁Notable ▁acc idents ▁include ▁ ▁Lan cast rian ▁T - 1 0 2 ▁ ▁Lan cast rian ▁T - 1 0 2 ▁of ▁the ▁Argent ine ▁Air ▁Force