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  Archive Reference: RAES/HARG/PHO/1/3


Two trochoided plane boat propellers, also two models of floats propelled by the waves.


 About 1885-1889

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  Lawrence Hargrave: 'Evolution of the Flying Machine I' (1885-1889)


"As far back as 1884 I put thought and labour on the evolution of the flying machine", noted Lawrence Hargrave in a letter of 9 March 1906 addressed to President and Members of The Aeronautical Society of Great Britain. From 1884 onwards Hargrave read a series of papers on his aeronautical research…

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