THE following note has been received from Boulton and Paul, Limited.
(1932), "The Cowling of Air‐Cooled Engines: A Note from Messrs. Boulton and Paul Shows the Townend Ring in a Favourable Light", Aircraft Engineering and Aerospace Technology, Vol. 4 No. 6, pp. 157-158. https://doi.org/10.1108/eb029559Download as .RIS
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