Murray was reluctant to build the entire chassis from composite materials until he understood their behaviour in a crash, an understanding achieved in part through an instrumented crash test of a BT49 chassis.
Murray era remiso a construír o chasis completo con materiais compostos ata entender o seu comportamento nunha colisión, unha comprensión que alcanzou en parte a través da proba de impacto dun chasis BT49.