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Thread: ABC props bending

  1. #1

    Unhappy ABC props bending

    I'm having trouble with several ABC props bending the blades during running.
    I don't know what alloy they are using, does any one know & if they can be heat treated. If so what temp/time.
    Thanks for any assistance.
    Eric.

  2. #2

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    what motor rpms are you doing ? are you thinning out the blades too much ? you can,t heat treat properly unless you have the correct kilm etc etc.

  3. #3

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    Thanks for the reply rol243.
    My props have minimum thinning, motor RPMs in the 33,000 to 35,000 range under load. I have access to heat treating kiln.

  4. #4

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    there has also been issues with Octura props busting off blades at high rpm,s. i would give Chris [ Dasboata ] a pm as he would be the guy to get better info from.

  5. #5

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    you are throwing blades only at 35k RPM ? jeez... makes me wonder what my hardened abc would do at 60k.

  6. #6

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    60k ?

  7. #7

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    63k RPM under load to be exact, yea

  8. #8

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    what motor and battery size is giving you those high rpms ?

  9. #9

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    lehner 1950 on 6s

  10. #10

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    Yes you can heat treat the ABC props. I don’t have my notes handy but there is a recipe that works.
    Tyler Garrard
    NAMBA 639/IMPBA 20525
    T-Hydro @ 142.94mph former WR

  11. #11

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    Hi Tyler, if you could PM some temps & times when you get an opportunity would be greatly appreciated.
    I've got a lot of these de pitched and hi lift (ie Bent back blades) props that don't work any more and I'm reluctant to spend too much more $ on these props if they can't handle the power.
    I'm happy with the speeds they produce over the Octura options, but I can't keep them from bending, some are after just 2 or 3 laps.
    I was trying to keep with standard props rather than modifying them too much.
    Thanks Eric.

  12. #12

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    you can get dasboata sell you some hardened props

  13. #13

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    Jim at ABC posted this awhile back.

    Make sure the prop is clean.
    Stress relief @340'F for 20 min.
    Temper @ 400-600'F for 20-60 min.
    Tempering(aging) time and temp depend on the size and personal preference.
    Air chill.
    TOY BOAT RACER
    Sponsored by Smock Racing
    IMPBA National Records Director
    IMPBA Dist.13 Director
    IMPBA 19887CD
    NAMBA 1169

  14. #14

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    Thanks for the info Doug, sounds like there is a little room for different amounts of hardness.

  15. #15

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    Quote Originally Posted by Doug Smock View Post
    Jim at ABC posted this awhile back.

    Make sure the prop is clean.
    Stress relief @340'F for 20 min.
    Temper @ 400-600'F for 20-60 min.
    Tempering(aging) time and temp depend on the size and personal preference.
    Air chill.
    I wonder if this would be the same for Octura Props?

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  16. #16

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    you would think all Berillium props would take simular heating temps and stainless steel props would be different.

  17. #17

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    I don' think the ABC props are Berillium copper, they are another bronze type.
    That was the main reason I was trying to find out what temps & times were needed for the ABC props.

  18. #18

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    Quote Originally Posted by TRUCKPULL View Post
    I wonder if this would be the same for Octura Props?

    Larry
    no Octura require 3 hours Larry

  19. #19

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    I just ran my Revolt this weekend with a stock set up and a brand new Octura X642 and came out of the drink with a bent blade.

  20. #20

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    Turtle

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  21. #21
    Join Date
    Jun 2008
    Location
    GA
    Posts
    2,302

    Default

    Jim at ABC told me to set props on copper plate while in oven. I guess this heats and cools prop more evenly. I purchased copper plate from McMaster Carr.


    Why are the most popular ABC props not in inventory? Whats the hold up?


    ...

  22. #22

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    Quote Originally Posted by detox View Post
    Why are the most popular ABC props not in inventory? Whats the hold up?.
    You must remember that props are not Jim's full time job, he has a business to run also, they are a side job for him.

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  23. #23
    Join Date
    May 2007
    Location
    NY
    Posts
    1,517

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    My Phil Thomas SS 45 seemed to be running slower than usual so I just chalked it up to my Lipo's probably on the way out. Yesterday I was looking over my props and noticed that the Ocura 452 that is my go to prop on that boat has blades that are bent back. One blade is worse that the other. First time for that.
    Team Liquid Dash

  24. #24

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    Quote Originally Posted by Raydee View Post
    My Phil Thomas SS 45 seemed to be running slower than usual so I just chalked it up to my Lipo's probably on the way out. Yesterday I was looking over my props and noticed that the Ocura 452 that is my go to prop on that boat has blades that are bent back. One blade is worse that the other. First time for that.
    Ray

    If the prop was thinned at all, was it hardened after the prop work?

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  25. #25
    Join Date
    May 2007
    Location
    NY
    Posts
    1,517

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    No I never hardened the prop after I thinned and balanced it. I def don't thin them as much as I used to. I came from nitro and gas boats and quickly realized that most of the stuff we learned from nitro and gas doesn't jive with FE boats. I'll mod up a new 452 next week and not thin it as much and see what happens.
    Team Liquid Dash

  26. #26

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    how about an octura stainless prop as opposed to the berrilium octura.

  27. #27

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    I saw some where on facebook that Jim said 568 degrees to harden the props
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
    BBY Racing

  28. #28

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    Quote Originally Posted by RandyatBBY View Post
    I saw some where on facebook that Jim said 568 degrees to harden the props
    Randy
    That formula was for ABC props.
    Octura props are a different animal.

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

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