Bowplane mechanism
Alfa bow planes
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I have a very clear sketch of a retraction mechanism of my own design (though I can't for sure say if a similar one has been done before) in my book, Diving Deep. I had cheap copies for sale at SUBFEST, and once the shop is set up, hard copies will be available once again. In the meantime, you can purchase and download the PDF version on my site for instant download right now.
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