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#1
04-12-2009, 05:52 AM
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| Twin-Propeller Open Water Efficiency Hi everyone, this is my first post here. Anybody knows twin-propeller open water efficiencies, similar to Schottel STP series? http://www.schottel.de/eng/r_produkt...uebersicht.htm I need this information and I emailed Schottel but no reply  Help me pls. I assume it will have less efficiency from large slow speed propellers (0.6-0.7) because it revolves at 1800rpm and is only 1.3m diameter, but is was hoping it could still achieve high efficiency because of the second in-lin propellor.  |
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