Stilly, our grandfather was head-hunted out of North America by the UK's Ministry of Industry to work in their timber mechanics laboratory designing mine support systems (that's pit props for those who are not in on the game). He got involved in the use of wood in aircraft structures in de Havilland's DH.91 Albatros and DH.98 Mosquito aircraft. Among other things, he wound up shooting holes in Mosquitos to find out how readily repairable they were as combat aircraft.