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  1. #16
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    Quote Originally Posted by LaveyT View Post
    John,Is that information on the web? I was able to copy the stuff below but I don't think I have seen the pamphlet that you speak of
    A REALLY smart (and handsome) guy posted it here a couple times, maybe he'll post it again
    Living in the Freedom provided by Bud Conner and his fellow warriors.
    R.I.P. my Heathen Brother






  2. #17
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    Click image for larger version. 

Name:	Everything You Need to Know About Propellers.pdf 
Views:	45 
Size:	724.0 KB 
ID:	285379
    Living in the Freedom provided by Bud Conner and his fellow warriors.
    R.I.P. my Heathen Brother






  3. #18
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    Quote Originally Posted by transomstand View Post
    A REALLY smart (and handsome) guy posted it here a couple times, maybe he'll post it again
    Stoker Nick???
    L.T.


  4. #19
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    That's pretty cool stuff, Thanks!
    L.T.


  5. #20
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    Quote Originally Posted by LaveyT View Post
    Stoker Nick???
    I didn't say old and broke down
    Living in the Freedom provided by Bud Conner and his fellow warriors.
    R.I.P. my Heathen Brother






  6. #21
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    Thats a good info base. Its along the same lines as the book you can get from Aeromarine research. The Secrets Of Prop Design. Great stuff.

  7. #22
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    Quote Originally Posted by ssv1761982 View Post
    Is the tach on a smartcraft monitor accurate? I see a diference in it and my analog tach.
    My sc1000 is about 100-150 rpm less than the new Lavorsi I have.
    Chris

    XS2003 - 280





  8. #23
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    Quote Originally Posted by pyro View Post
    If you have a smart phone, you can download a musical instrument tuner app with a frequency counter readout, and use audio of the running engine to measure RPM. Just multiply the Hz by 60 to get RPM. Overtones may sometimes cause the resulting number to be half or twice the actual RPM, but it will still be accurate.

    My neighbor's Johnson 15 hummed along at 98.5 Hz, or 5910 RPM.

    I use "Pano Tuner" on my iPhone. There's a free version with banner ads, but it works just fine.
    that is interesting. does it really work? On 4 cyl. would it be a multiplier of 4?I want to try that on different motor applications as well. I have the same accuracy variabilty with a differnt type of instrament. I have 5 thermometers (some mercury others didgital) that are critical in my business and they vary about 2%. As long as I know which way they are off, then no problem. I would expect the 2% variance would follow with tachs.
    16' Tunnelking 130 Johnson
    23' Fourwinns 5.7
    15' fishing 9.9 honda

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