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  1. #1

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    Carbon Fiber Landing Gear concern

    I have a concern about a Graph Tech carbon fiber landing gear that I bought for a Goldberg Extra 300. The bottom of the gear where the axle would go through is just barely over 5/8" wide. It slowly widens as it rises toward the fuselage, but it's still only slightly over 3/4" wide a couple of inches above where the axle would go. My concern is that the hole I will need to insert the axle through will take away so much of the material that I won't have enough left for any strength and the axles will tear out on a hard landing (that never happens...). A couple of the axle sets I've handled need nearly a 3/8" hole which would only leave me about 1/8" in front and behind the axle hole of landing gear material. Am I overly concerned? Are there other axles out there that I haven't found that don't require this large a mounting hole?

    For those unfamiliar with the Goldberg Extra 300 it's a 68" span and I will be using a 120 4-stroke. The attached picture shows the bottom of the landing gear next to a ruler so you can see the size of the unit. Anyone have any wisdom for me on this one?
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    I always seem to have not quite enough horsepower to fly underground...

  2. #2

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    Dec 2002
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    RE: Carbon Fiber Landing Gear concern

    You may want to consider a different axle that doesn't require such a big hole. Tower Hobbies sells axles made by "Harry Higley" which only require a hole the size of the axle it self. I use these on my 2 meter pattern planes with the graph tech gear. The have them in 5/32, 3/16, and 1/4. They only run about $3 a pair.

    Todd

  3. #3

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    RE: Carbon Fiber Landing Gear concern

    Todd,

    Thanks for the tip on the Harry Higley axles-they look to be just the ticket. I can't believe I missed those at Tower as I peruse their site quite often just window shopping. I guess I'd better pay a bit more attention. Thanks again for the item and source.

    Dennis
    I always seem to have not quite enough horsepower to fly underground...

  4. #4

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    RE: Carbon Fiber Landing Gear concern

    You're welcome Dennis,
    They're nice axles, you'll like them.

    Todd


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