Figuring out what prop to run?

Discussion in 'Props Forum' started by Joenagy, Nov 23, 2016.

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  1. Nov 23, 2016 #1

    Joenagy

    Joenagy

    Joenagy

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    I Need some help ................ Not Medical supervised Help. LOL

    So Ive got a box full of props and a room full of boats. How to I figure what prop to run? I need some sort of cheat sheet.

    Joe
     
  2. Nov 23, 2016 #2
  3. Nov 24, 2016 #3

    Joenagy

    Joenagy

    Joenagy

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    Thank You
     
  4. Nov 24, 2016 #4
    That's a great resource. If you are interested in more look at the series of articles on props in the October 2013, April 2014, and March 2015 issues of the NAMBA Propwash.

    Lohring Miller
     
  5. Apr 3, 2018 #5

    Stephen Ecuyer

    Stephen Ecuyer

    Stephen Ecuyer

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    What is the best prop for a HTB 290 with Nova Rossi 21 KEEP outboard
     
  6. Apr 3, 2018 #6

    PaulHail

    PaulHail

    PaulHail

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    I find searching intlwaters via google to be a pretty good way to find out tips on props for a given hull.
     
  7. Apr 18, 2018 #7

    Alan Elzer

    Alan Elzer

    Alan Elzer

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    1440(pitched up & back cut), m440, x442
    Sent from my SM-N920V using Tapatalk
     
  8. Apr 20, 2018 #8

    shoboat

    shoboat

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    Joe, and Others,

    With the newer style (Some are 3 years old now) ABC Propellers here are some general ideas for heat racing:

    21-Tunnel:

    1417, 1419, 1514,1515

    45-Tunnel:

    1815, 1817,1915

    21-Mono:

    1614/3 Chopper Style

    Newest 1614/3 Cleaver Style

    45-Mono:

    1914/3, 2015, 2115

    Sport 40:

    1914/3, 2015, 2115

    1/8th Scale:

    2315

    Newest 2315/3

    12-Hydro:

    1415, 1417, 1419, 1514,1515, 1517, 1519

    21-Hydro:

    1715,1716, 1815, 1817

    45-Hydro:

    2117,2215, 2217, 2219

    67-Hydro:

    2515, 2517, 2519

    90-Hydro:

    2617, 2619, 2717, 2719

    Twin Hydro:

    2717, 2719, 2817,2819

    Just a rough ballpark for most of the Nitro classes.

    The rake that works well on all of these is a: 19 degree rake and 38% blade area

    The three blades are 15 degree rake and either 60% blade area

    or some newer ones coming out soon will have 47% blade area also.

    Thanks For Reading Fellas,

    Mark Sholund
     
  9. Apr 20, 2018 #9

    Michael Costanzo

    Michael  Costanzo

    Michael Costanzo

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    hi mark, maybe you could give a little insight in trying to compare RAKE and BLADE AREA between prop makers...like i run a lot of Prather props.so when i look at the ABC prop chart i have sort of an idea of how to compare the two.thanks,mike.
     
  10. Apr 20, 2018 #10

    shoboat

    shoboat

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    Mike,

    Prather or Octura do not use Blade Area Ratio or Rake angles like ABC.

    You get what you pay for. You can calculate it if you have a bunch of

    time on your hands Mike? ABC Propellers are designed with an expensive

    software package that allows Jim to make whatever design he wants too.

    Compare with diameter and pitch ratio and you will be pretty close. Prather

    is mostly a 1.5 pitch ratio, and Octura has many to choose from.

    Enjoy The Weekend,

    Mark Sholund
     
  11. Apr 20, 2018 #11

    Michael Costanzo

    Michael  Costanzo

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    hi mark,thank you for the reply. i am using the Dia/Pitch method now and that is what i will stick to.have a great weekend also,mike.
     
  12. Oct 18, 2019 #12

    Terry Micallef

    Terry Micallef

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    Any thoughts on the correct prop for a Zelos G 48? Motor is a stock 30cc. Running a Zipps super tuned pipe. Only turning 45mph with a Prather 275.
     

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  13. Oct 18, 2019 #13

    Alan Elzer

    Alan Elzer

    Alan Elzer

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    1440 pitched 3.2 & little cup is hard to beat. Or 1515, 1516's
     
  14. Oct 20, 2019 #14

    Mark Anderson

    Mark Anderson

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  15. Oct 23, 2019 #15

    Dennis Somers

    Dennis Somers

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    Terry, get in touch with Bob English @ kneedrag10@yahoo.com and try an ABC 2714-15-50 (2), or an ABC 2716-15-50 (2). Bob thins, sharpens, and balances these props for $50 and ships for $5.

    There are a few other simple things you can do for more speed on that boat. Don't use a velocity stack on the carb. Shorten your Zipp pipe up on the header as much as you can without it leaking at the header bend. And YOU MUST provide a lot of air into and out of, that sealed hatch. Gas motors suck a lot of air and the enclosed pipe heats and expands that air. Get fresh/cool air IN and hot air OUT.

    And stuff the hull with pool noodles, and glue some floatation under the hatch.
     
  16. Nov 10, 2019 #16

    Terry Micallef

    Terry Micallef

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    I believe after today I am on the right track. Our club's engine builder finished the mods on my stock motor so that along with Dennis's helpful suggestions pushed this Cat to 65.1 mph today! Bob English did a great job with this 2714/15 that he sent me.
     

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  17. Nov 11, 2019 #17

    Terry Micallef

    Terry Micallef

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    Stock motor mods...piston is modified and lightened, the transfer ports are reshaped and bigger, the intake port and the exhaust port is bigger and retimed, the squish is set and burn chamber is larger, the crank is trued and the carb is modified to. 20 mph gain. Thank you Steve! (SS Racing)
     
    Last edited: Nov 13, 2019
  18. Nov 12, 2019 #18

    Terry Micallef

    Terry Micallef

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    SS Racing motor pics
     

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