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Type: Posts; User: Dana

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  1. Replies
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    Take a look at JavaProp. It doesn't do...

    Take a look at JavaProp. It doesn't do everything you want, but it's free and can help get you in the ballpark.
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    For low to moderate speed aircraft, larger...

    For low to moderate speed aircraft, larger propeller turning slower is more efficient than a smaller propeller turning fast.
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    If you crash, the FAA or NTSB will ask to see the...

    If you crash, the FAA or NTSB will ask to see the aircraft logbooks... they did when I had my accident.
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    Glad to see Hatzes holding steady, too... Hatzes...

    Glad to see Hatzes holding steady, too... Hatzes and Piets just seem to go together. The hotter planes (Pitts, Starduster, Skybolt, etc.) without current kit support are dwindling, I guess people...
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    JLS, it can be done (breaks in the longerons) but...

    JLS, it can be done (breaks in the longerons) but it's not optimum. You will have to analyze each element (like you would for any truss anyway), and you'll probably need doublers or finger plates at...
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    With the loss of the 103 training exemptions,...

    With the loss of the 103 training exemptions, insurance was about the only thing USUA did in recent years.
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    Correct, you have to be a USUA member. Just...

    Correct, you have to be a USUA member. Just consider it part of the premium.
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    Avemco, Falcon, EAA, USUA, ASC, others.

    Avemco, Falcon, EAA, USUA, ASC, others.
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    I would say it's a bad idea. Clecos don't hold...

    I would say it's a bad idea. Clecos don't hold nearly as securely as rivets. They're fine when used as intended, but vibration and bouncing around would wiggle them around and possibly elongate the...
  10. Move. But seriously, if it has undoped...

    Move.

    But seriously, if it has undoped sailcloth covering then yes, keeping it outside is a real bad idea. The later RANS's were doped, I believe, which isn't quite as bad. A better choice in...
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    Contact the FSDO. Getting new operating...

    Contact the FSDO. Getting new operating limitations specifying a new test area is straightforward, no problem if you can trailer it there. I've done that for purchased homebuilts that I wanted to...
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    A 2 seater is not an ultralight (at least in the...

    A 2 seater is not an ultralight (at least in the US). You will need at least a Sport Pilot certificate with a seaplane endorsement, or a Private Pilot certificate with ASES (airplane single engine...
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    Looks homemade. Could be from a hovercraft or...

    Looks homemade. Could be from a hovercraft or airboat.
  14. Not a P-51, is a typical R/C pattern (stunt)...

    Not a P-51, is a typical R/C pattern (stunt) plane of the early 1970s. Not sure which one, there were hundreds of designs back then... it looks a little like a Sterling Lancer but the rudder shape...
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    Whatever it is, it's beautiful.

    Whatever it is, it's beautiful.
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    Frank, look for a free program called AF5Rename,...

    Frank, look for a free program called AF5Rename, it can do all kinds of mass renaming.
  17. Thread: Real Pilots?

    by Dana
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    Two words: "paragraph breaks."

    Two words: "paragraph breaks."
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    Most airplanes have at least some dihedral. The...

    Most airplanes have at least some dihedral. The airfoil used has nothing to do with it.
  19. Ditto.

    Ditto.
  20. Thread: homebuilt design

    by Dana
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    Pazmany's Light Airplane Design. Bruhn's...

    Pazmany's Light Airplane Design. Bruhn's Analysis and Design of Flight Vehicle Structures. Peery's Aircraft Structures.
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    What Ron said, with one caveat: If your special...

    What Ron said, with one caveat: If your special issuance requires anything on your part, like participation in a HIMS program, you have to keep that up until the medical expires. If you don't, and...
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    I don't know what equation you're using, but for...

    I don't know what equation you're using, but for a given vertical speed a longer shock stroke absorbs the energy over a greater distance, so the load is less.
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    Everybody worries about liability, but my...

    Everybody worries about liability, but my understanding is that there has never been a successful suit over a used homebuilt airplane. Put it on Barnstormers, the old 'dacs still have a following. ...
  24. Thread: Open Source Plans

    by Dana
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    A new design that "looks very similar" is one...

    A new design that "looks very similar" is one thing, a copy with identical structure (or with very minor changes) is another. If your copy would make it possible for somebody to build a new plane...
  25. Thread: Open Source Plans

    by Dana
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    Not a lawyer, but I'd think that without...

    Not a lawyer, but I'd think that without permission from the copyright holder you'd be in violation of copyright law. Serial number has nothing to do with it a builder (from legitimate plans) can...
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