National Physical Laboratory reports and correspondence. Includes:

- National Physical Laboratory report entitled ‘Experiments on a model of the rigid airship R100’, including five figure drawings

- National Physical Laboratory report on tensile tests of 50-ft lengths of stranded cables, including six graphs

- Correspondence with the National Physical Laboratory

- National Physical Laboratory report entitled ‘Further experiments on airship model M.19. Scale 1/200, including two pages of figure drawings

- Report entitled ‘Resistance coefficients of 1/240th scale airship model M.19.’, including two figure drawings

- Report entitled ‘Measurements of the resistance of three rigid airship hulls’, including three figure drawings

- National Physical Laboratory report entitled ‘Report on measurements of the hinge moments on top vertical fin of 5 x 10⁶ cu.ft. airship model’, including two figure drawings

- Report entitled ‘Further experiments on a model of a 5 million cubic feet airship’, including five pages of figure drawings -

Report entitled ‘Experiments on a model of a 5 million cubic feet airship for the Airship Guarantee Company’, including eight pages of figure drawings. The report is dated March 1924 and is marked ‘Confidential: This paper is the property of the Airship Guarantee Co. Ltd.’