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  1. #1

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    Electric prop advice

    WE"RE GETTING THERE.........Close to flying a new electric. As I mentioned in an earlier post, we are building a 30" Herr "Super Cub" and it is our first electric built from a kit. I have a Turnigy motor and a GWS 8/4 prop. The motor shaft has a flat side to accommodate a set screw if you need it. There is a hub that slips over the shaft with set screws so as to accommodate a larger prop hole. What is the best way to attach the prop? One side of the prop hole is round whereas the opposite side has a "nut" shaped indentation. It has me baffled. Any help will be greatly appreciated. Thanks

    PS.....I have posted this on the "Lekkie" board also!!!!!


    PPS......How does one get informed by email when someone responds like the old board?
    Steve Westphal

  2. #2
    Boomerang1's Avatar
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    Check out the video by Rob2160 in the jet forum, post #237.

    What do you think of the new site

    Helped me stop all the notifications I was getting.

    Just drill the prop out if needed to fit the adapter & put a nut & flat washer either side of the prop.

    John.

  3. #3

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    John......I like it I guess. Everything new to me takes a while to get thru my thick head!!!!!!!!! I am sure I will be inquiring more in the near future. BTW...there are no threads on either the prop shaft or the adapter hub............now what do I do? Thanks.
    Steve Westphal

  4. #4
    Boomerang1's Avatar
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    Did you click on what do you think of the new site?' (the blue writing).

    It's a link to the thread with the step by step video on how to change notifications.

    The shaft adapter should be a neat fit on the shaft, if not you have the wrong adapter.
    One set screw should tighten on the flat on the shaft, the other just tighten it up.

    GWS props have the nut shaped moulded on the back of them because the GWS gear
    boxes had thin threaded shafts & the nut provided a positive drive to the prop.

    Just drill the prop out to suit the adapter you have if it's the correct adapter for your shaft.
    If this leaves the hub of the prop too weak you will have to use another prop. - John.
    Last edited by Boomerang1; 08-23-2013 at 07:57 PM.

  5. #5

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    If I get the prop to fit good on the adapter hub how do I lock it in place so it doesn't fly off? Nothing is threaded on the Turnigy shaft or the adapter hub. Can I glue it with, say, JB Weld? I am a newbie to electric but have flown glow since the reed Tx/Rx days(mid fifties) I remember when proportional was the NEW rage. Our first propotional gear was a Heath Kit that we built. It served us well until we bought a new Kraft system,. Thanks.
    Steve Westphal

  6. #6
    skaliwag's Avatar
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    Real Airplanes have Round Engines and Two Wings.

  7. #7

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    Skali.....The Turnigy shaft is 3.1 mm..............the adapters I find are for either 3.0mm or 3.175 shafts...........what do I do???
    Steve Westphal

  8. #8
    skaliwag's Avatar
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    Doesn't Turnigy have one?
    Real Airplanes have Round Engines and Two Wings.

  9. #9
    Boomerang1's Avatar
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    Never heard of a prop adapter that wasn't threaded, must be some other item.
    Some adapters just locate the prop on a spigot & rely on a couple of O rings to hold
    the prop on & provide some shock absorbing if the prop hits the ground.

    The prop adapters skaliwag put the link to squeeze down on the shaft so an exact
    match to the shaft diameter isn't needed.

    If you could post some pics it would be a help. - John.

  10. #10
    Moderator BMatthews's Avatar
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    Steve, from your first post in this thread....

    There is a hub that slips over the shaft with set screws so as to accommodate a larger prop hole.
    If the hub that came with the motor has two longer set screws that stick out then what you've got is a "prop saver" hub. It's something that only works on smaller electric motors. To use it you fit the hex hole over the bump on the nose of the adapter and then use a couple of small "O" rings around the blades and around behind the set screws to rubber band the prop to the adapter.

    You may find that you need to somewhat drill out the hex portion for this to work.

    At least if there's no obvious way to fit the prop to your adapter that came with the motor then I suspect this is what you've got.
    Witty saying to be plagarized shortly.....


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