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  1. A

    Looking for CGS Hawk feedback

    I’m considering a new CGS Hawk ultralight kit and am looking for feedback of the ground handling and flight characteristics. I’m leaning towards the taildragger config for weight considerations (the tricycle version was very close to the 254 lb. limit, according to the factory). Adding a...
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    Solo 210 engine Walbro Carb, Exhaust 4 Blade Prop

    I'm downsizing my toys and selling this Solo 210 engine w/ Walbro carb, exhaust, and 4 blade (dual twin blade) propeller and crush plate. I bought this several years ago and have been storing it ever since. Was planning to build a Sky Pup and use this (or the other engine I'm selling), but...
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    Kawasaki 340 and 32mm Mikuni Carb NOS

    I have a Kawasaki 340 and 32mm Mikuni carb for sale. Both are new, never been run or used. These were purchased from j-bird many years ago, and were intended to end up on a Sky Pup. The plane was never built and they have been stored since purchase. Asking $900. Please PM me if interested.
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    Curved aluminum tubing analysis

    I've noticed highly curved tubing on many ultralights, especially in the cockpit area. image obtained from: http://www.ultralightamerica.com/images/Gallery/Spitfire Cockpit single.jpg What methodology would one use to analyze these tubes? They seem a bit too eccentric to use the Euler...
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    New FEA package question.

    Is anyone familiar with NeNastran's new FEA package, in-CAD? NEi Nastran in-CAD | 3D CAD Modeler + Nastran FEA This is touted as having decent 3d modelling ability, as well as being (relatively) affordable. I think they are asking a little less than 5k for the linear elastic version. I've...
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    Isogrid and Rutan designs?

    While at Oshkosh this year, I happened to look in the windows of the Scaled planes on display. I noticed a strange dividing of the structure interior. The image below is that of the V-Jet. Is this an example of isogrid? If so, any thoughts on the benefits / drawbacks in using it? Any ideas...
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    Looking for pressurized door lock images

    I apologize if this is the wrong location to post this. I am looking for some images and/or information on the locking mechanism for pressurized light planes. Really curious to see how the door pins are actuated. I've searched on google, but couldn't find anything related to light aircraft and...
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    Trying to figure out what type plane in an ad

    This has been bugging me for a while. There is an ad on page 63 in the March 2009 issue of Sport Aviation for Flightcom. The pilot is flying some kind of open air craft w/ strut braced, transparent wings. Would anyone have an idea what kind of plane this is? Thanks for your time. -john
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    Flying Wing Questions

    I am getting rather interested in flying wings. The Mitchell U2 really strikes my fancy. That being said, I now embark on the long road of learning. Is the method to size the vertical tail the same for a flying wing as for a conventional planform? When I look at planes like the Mitchell series...
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    Can someone help me identify this plane?

    I'm not sure on what site I stumbled across this plane. I have had no luck in determining what it is. Anyone have any thoughts? Thanks in advance.
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    Thundergull

    I came across Earthstar Aircraft's Gull series of light planes and was highly impressed. The thing that puzzles me the most is how they are able to get such a slow stall speed out of a small wing and a reasonably high weight. I've contacted the designer and he insists that stall speeds were...
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    Finnish Metric Birch Plywood

    Would anyone know the specs for the very thin Finnish birch plywood that I see Wicks and AC Spruce selling? Wicks sent me some papers on the plywood, but it only had the tensile strength listed. There was nothing about the shear strength. Thanks
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    UL Stall speed

    I was reading FAR 103 just now and noticed that they call for the 24 knot stall speed to be for the power off variety. Would anyone know if this would forbid the use of flaps to meet this speed? Also, what kind of G ratings would an ultralight really need? I had initially thought 6G's, but am...
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    Wing area questions and a few others

    If one is looking at a low wing plane, will the area of the wing that passes through the fuselage be counted for wing area purposes? I have seen this in many planes, but have no idea how one would calculate the lift on this section. Any thoughts? I am sketching up an ultralight that will use...
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