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  1. D

    Saving Ultralights From Being Banned

    How is the town liable for accidents caused by ultralight aircraft or pilots?
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    Airplane for the Common Denominator

    Is that still true if you exclude trainer aircraft? If so, why do you think that is? It doesn't make sense. I see Suburbans often with only one or two people, but presumably they spent the extra money because they want to be able to carry the whole team sometimes. Either way, an RV-10 or C182...
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    Airplane for the Common Denominator

    I think the common denominator family airplane must have at least six seats, because when families travel they typically take their largest vehicle which often has 6+ seats and ample baggage capacity.
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    The concept of a flying car will eventually succeed

    Are you thinking of a parachute type wing or a sail like on a weight-shift control trike or something else? What do you suppose that would that limit the cruise speed to?
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    The concept of a flying car will eventually succeed

    Let's discuss the engineering reasons why it is difficult to integrate the attributes of an airplane and road vehicle (I think "car" is unrealistic). For example, 1. Airplanes typically have a high center of gravity relative to the distance between the wheels for prop, wingtip, and empennage...
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    The concept of a flying car will eventually succeed

    There are many, many vehicles on the roads that are not "cool, sleek, or racy." A substantial percentage of car owners could get a pilot's license if they had a reason to; it's not that hard. Airlines only serve certain cities. You can't reliably and economically rent a car at most airports.
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    The concept of a flying car will eventually succeed

    The Switchblade wing looks like it's too small and too far aft, and the tail volume looks too small, and the intake ducts for the ducted propeller look too draggy, and I don't think they designed enough space for the people and engine. OTOH, it looks like the center of gravity is low and would...
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    The concept of a flying car will eventually succeed

    Yes, I would. And it wouldn't have to be a good airplane or good car, just better than my current system. My most frequent trip involves one airplane, two cars, two hangars, and three loading/unloading cycles for each direction of each trip, and often an additional drive to the airport and...
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    Landing Light: Wing or Nose?

    I have LED landing and taxi lights on the nose, and they illuminate the runway well, better than the old incandescents. I suppose the prop must block a small proportion of the light, but I can't tell. Since they're on the lower nose cowl, I can't see any reflection on the prop. Wing-mounted...
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    Certificated to experimental for leading edge cuffs

    If a smooth landing is your goal, I suggest you finish your flare before reaching the stall angle of attack. If you're reaching the stall AoA too early, start your flare at a lower AoA (higher airspeed) for a normal landing. The entire flare should be on the linear part of the CL curve so you...
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    Vortex Generators !!!! for non-flying vehicle :-)

    Before you guess where the VGs should go, aren't you going to attach tufts to your motorhome and film them while driving to see where the flow separates?
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    Electric propulsion and Superconductivity

    Liquid nitrogen works just like sweat -- it cools as it is evaporating. To make batteries last, motors should be operated as efficiently as possible. You may find a motor's most efficient rpm is around 90% of its no load rpm, so lowering motor rpm in cruise could be counter-productive.
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    Synergy Aircraft

    I was also disappointed with the webinar. I got the impression he didn't prepare for it at all. He just browsed his computer for snapshots to show us of the new shop and some parts they've been working on and even his vacation photos!
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    Movable main wings?

    1. Has there been an airplane designed such that a pilot could change the angle of attack of the main wing by moving the wing relative to the fuselage (like a stabilator moves) other than weight-shift control aircraft? Possible benefits include that the fuselage could remain at the minimum-drag...
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    21st century Volksplane?

    It's simple! All you have to do is form an LLC or corporation for the business! Borrow, from yourself or the bank, an amount equal to any assets, and distribute any cash to the owner(s). Then, the business will be lawsuit-immune, having zero net worth. Problem solved! You would have to...
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