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  1. A

    Legal Eagles Near NE Georgia ?

    Are any of you building LE's anywhere NE Georgia? I'd appreciate the opportunity to sit in one before buying the plans and building a mockup (ancient bones and all that). Alan Winder, GA
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    Part 103: Welded frame + Aluminum Wing Ribs ?

    I’m ready to sign up to TIG weld an ultralight frame, but the designs I’ve found have wing designs with lots of fiddley wooden bits (JLA Airbike, Legal Eagle). Would one of you kindly point me to a design or two that uses a wing made with ribs that are either stamped aluminum or fabricated from...
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    Jetson Aero Speeder

    I searched here at HBA but could not find any posts on the Jetson Aero Speeder Jetson Aero Speeder . I am a retired engineer and find the open-air single seat design fascinating. I would like to explore the design space of such a vehicle. Any recommendations on lift component sources...
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    Dimple and Deburr Sequence

    New kid here. The purposes of deburring thin aluminum is to clear out the hanging chads and to eliminate stress crack starting points. For thin aluminum skins (0.020, 0.025) is the sequence drill, dimple, deburr or is it drill, deburr, dimple? Thanks.
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    Workshop Overhead Chainfall?

    I have reached the age and physical condition where lifting heavy/awkward things has become a bit "iffy", so I'm thinking of installing a traversing chainfall in the overhead of my workshop. The shop is 11' x 24' with the usual roof trusswork overhead. Or am I over-thinking the problem...
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    Fastener Orientation

    New Guy here. I've heard people talk about a rule of thumb that bolt heads are to be on the forward or upper side of a bolted connection, but I cannot find anything in AC43.13 about that. Also, I'm having trouble with the logic of such a rule if the builder ensures a proper torque on the...
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    Understanding Induced Drag

    I'm trying to understand the drag and thrust curves of the plane I'm building. Profile/form drag - no problem. My sticking point right now is induced drag. All of the graphics on the topic show induced drag decreasing rapidly with increasing speed. But the equations I find on the subject, as...
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    Flush Pulled Rivets and Polished Aluminum

    I am in the planning stages of building a Thatcher CX5, to be finished "in the bright" as it were. The design calls for pulled rivets and I really like the look of dimpled rivets, which would also be more compatible with the act of polishing the sheet aluminum than would a simpler set of...
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    Hello From VA/GA

    This past spring I attended Sun-n-Fun where I bought a set of Thatcher CX5 plans. I had all sorts of intentions to begin construction this summer, to the point of fabricating a nice flat, level worktable in my workshop and begin collecting tools for sheet aluminum and construction tips from the...
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    Low Wing w/ Round Engine?

    I like the classic looks of the Cub and Kitfox, but need a low-wing two seat enclosed cabin design. I really like the sound of round engines. Can the group help me identify some designs? Alan
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