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  1. #1
    Join Date
    Jun 2003
    Posts
    483

    Default A major improvement in efficiency? the new 'Sharrow propellor'

    Is this a useful new engineering development or snake oil?

    https://www.boattest.com/review/shar...gineering/3986

    It certainly looks interesting although I would want to see a comparison with duoprops with a total of 6 blades as a lot of the claimed improvements are also claimed by Volvo for their duo-prop systems.

  2. #2
    Join Date
    Sep 2005
    Location
    Sussex
    Posts
    8,710

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Quote Originally Posted by Scarron View Post
    Is this a useful new engineering development or snake oil?

    https://www.boattest.com/review/shar...gineering/3986

    It certainly looks interesting although I would want to see a comparison with duoprops with a total of 6 blades as a lot of the claimed improvements are also claimed by Volvo for their duo-prop systems.
    Would be interesting to read but the article seems to be largely hidden behind an authentication wall.

  3. #3
    Join Date
    Jun 2011
    Location
    Volos-Athens
    Posts
    4,945

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    not much to read J,

    http://www.sharrowengineering.com/the-propeller/

    dunno, could be interesting, could be snake oil. Need an example and some test data which we probably wont get...

    V.

  4. #4
    Join Date
    Apr 2008
    Location
    Isle of Man
    Posts
    2,164

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Looks like a whisk

  5. #5
    Join Date
    Apr 2016
    Posts
    69

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Quote Originally Posted by vas View Post
    not much to read J,

    http://www.sharrowengineering.com/the-propeller/

    dunno, could be interesting, could be snake oil. Need an example and some test data which we probably wont get...

    V.
    If you scroll down on the linked site, there is fairly significant discussion and testing data to be seen, all without registration. The design of the website makes it seem there is little on offer but it is there albeit in a small window. At least one of the test conculsions is unfairly presented imo, and the issue is obvious. That minor presentation issue (author at fault) aside, it looks interesting.

  6. #6
    Join Date
    Sep 2005
    Location
    Sussex
    Posts
    8,710

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Quote Originally Posted by vas View Post
    not much to read J,

    http://www.sharrowengineering.com/the-propeller/

    dunno, could be interesting, could be snake oil. Need an example and some test data which we probably wont get...

    V.
    Thanks Vas

  7. #7
    Join Date
    Jun 2005
    Posts
    326

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Don't know whether it's 'best thing since sliced bread' or 'snake oil' but it certainly looks cool!

  8. #8
    Join Date
    Nov 2002
    Location
    Colwell Bay
    Posts
    5,712

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Quote Originally Posted by Scarron View Post
    Is this a useful new engineering development or snake oil?

    https://www.boattest.com/review/shar...gineering/3986

    It certainly looks interesting although I would want to see a comparison with duoprops with a total of 6 blades as a lot of the claimed improvements are also claimed by Volvo for their duo-prop systems.
    Er, hang on a moment, there's a more important thing at stake here.

    Despite your run of various incredibly short lived V8's, you cleared 50 knots, I was never going to do that in a Huntsman, even less so given my change of boat.

    So I think its fair to say that in our very fun 10 years or trying to get to Cowes fastest, the Levi hull won, so now, you really don't need to go faster, you need to go...

    If that wanky prop was offering a real gain it would be much bigger news, ergo, snake oil.

  9. #9
    Join Date
    May 2001
    Posts
    15,719

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    Quote Originally Posted by burgundyben View Post
    Er, hang on a moment, there's a more important thing at stake here.

    Despite your run of various incredibly short lived V8's, you cleared 50 knots, I was never going to do that in a Huntsman, even less so given my change of boat.

    So I think its fair to say that in our very fun 10 years or trying to get to Cowes fastest, the Levi hull won, so now, you really don't need to go faster, you need to go...

    If that wanky prop was offering a real gain it would be much bigger news, ergo, snake oil.
    Agreed, google for Greg sparrow draws a blank, apart from an obituary, maybe appropriate!

  10. #10
    Join Date
    Sep 2017
    Location
    Taipei, Taiwan
    Posts
    298

    Default Re: A major improvement in efficiency? the new 'Sharrow propellor'

    This video might provide more vivid information.

    https://www.youtube.com/watch?v=fO862lWuBdE

    It seems that Steve highly recommend the new prop.

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