A booklet proposing a new propeller design in 1876 - the 'De Bay' Propeller -was recently discovered in the archives of the Lloyds Register Foundation. Of a very unusual design this animation shows how the De bay propeller worked.
It consisted of two screws, one with four and one with five blades. Portions of each blade were cut out.The Screws were fixed on two shafts - one tubular and one solid which allowed the screws to revolve in opposite directions, the solid portions of each blade passing through the gaps cut out in the other. The design was intended to make the propeller more efficient by forcing water directly backwards, in line with the keel.
Initial trials proved Mr DeBay’s claims. Ships fitted with the propeller were swift, handled well, made huge savings in fuel, created no side-wash and little vibration. But this innovation has long been forgotten by history.
For a full audio podcast on the history of the marine propeller check out the Mariner's Mirror podcast.
#history #maritime #maritimehistory #maritimeeducation #anchor #historyfacts #historygk
Негізгі бет Freak Propeller! The 'De Bay Propeller' from 1876
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