Duralumin sections

Graphs, calculations, reports and correspondence related to duralumin section. Includes

- Calculations about helical tubes

- Correspondence between the Airship Guarantee Company Ltd., Vickers and James Booth & Co. Ltd., duralumin manufacturers, regarding samples and orders of duralumin tubes

- Correspondence with Professor Burstall at the University of Birmingham regarding the testing of duralumin tubes

- Handwritten calculations of the properties of special sections

- Laboratory report on compression tests carried out on duralumin tubes

- Two Vickers Duralumin leaflets, one entitled ‘List of sizes and weights of sections’ and the other ‘Various sizes of extruded angles, channels, tees, etc.)

- Three laboratory reports on the test results on duralumin test sections