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  1. N

    Really stupid (and long) multi blade contra rotating prop design question

    First, I did try searching for this, with no success. I have read most of the 2 vs 3 and up blade discussions. Also, the big/slow vs small/fast diameter ones. How about a multi-level prop similar to the contra-rotating designs without the "contra"? Think Bi-plane instead of Monoplane, with...
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    Theoretical electric powered Part 103 Ultralight legality issue

    When Part 103 was introduced, A battery powered aircraft was probably never considered. Here's one for the "Analegals". https://www.homebuiltairplanes.com/forums/images/smilies/smile%20ponder.gif The aircraft complies with all the requirements of Part 103 with an empty weight of 254 pounds...
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    Looking for a prop thrust chart, or formula to make one

    I am looking for options to pick prop diameter and blades. Can a thrust be computed for a given HP value by changing diameter and number of blades? Example: A 100HP engine with a fixed pitch 2 blade 72" prop has (x) pounds of max thrust at 2700 rpm. Can (x) be maintained for 3, 4 and 6 blade...
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    How close can I get to this design in real world application?

    Hi, Another NEWBIE-WANNA-BE-A-JET-PILOT. Have read hours worth of the posts in this area and eliminated most of the exotic stuff. I'm hoping that this type will be possible without too many major design changes:ponder:. The wing sweep will most likely be the biggest challenge, which is OK...
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    I think I want a Falcon? Need opinions...

    Hi, Newbie looking for simple, relatively inexpensive plane here. I like the circa 1980's American Aerolight Falcon XP. They seem pretty simple and the nice ones are in my budget (under 15k). Usage will be about 3-5 hours per month for recreation. Any thoughts good or bad welcome. :ponder:
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