Depends on what your goal is. For superior performance under power, this prop cannot be beat: http://www.atomic4.com/propeller.html
A folding prop is faster under sail for sure and most racers would want one. 6.2 knots is good, do you have RPM and manifold pressure readings for the boat? Joe Coquina C&C 35 MK I Atomic 4 powered From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of David Morris via CnC-List Sent: Tuesday, October 30, 2018 10:04 AM To: cnc-list@cnc-list.com Cc: djmor...@djma-ltd.com Subject: [EXTERNAL] Stus-List Propeller Sizing I determined at haulout this weekend our newly-acquired 1975 C&C 30 MKI, Atomic 4, direct drive is equipped with a Gori two-blade folding prop, measuring approx. 11.5". I have neither the experience or expertise to know if this is a great prop for the boat, a lousy one, or, more likely, somewhere in between. After a major tune-up on the engine, we seemed to be able to run at around 6.2 knots in relatively calm water. Any advice, suggestions, observations anyone would care to offer on prop selection would be much appreciated. David J. Morris, MBA President, D.J. Morris & Associates Ltd. 427 Division Street, Kingston, ON Canada K7K 4A8 Tel. 613-531-4429 email: djmor...@djma-ltd.com<mailto:djmor...@djma-ltd.com> Member: Professional Writers Association of Canada Blogging at: http://davidmorrisjourneys.wordpress.com/ [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> Virus-free. www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
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