THE all‐metal “Valetta” has been built to the order of the British Air Ministry as an experimental aircraft to obtain particulars regarding the relative merits of a float and boat‐seaplane of a size comparable to the “Calcutta” as regards performance and seaworthiness.
(1930), "The Three‐Engined Short “Valetta”: Full Details with Dimensions and Estimated Performances of a Monoplane Float Version of the “Calcutta”", Aircraft Engineering and Aerospace Technology, Vol. 2 No. 8, pp. 207-208. https://doi.org/10.1108/eb029302
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