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Vance
Vance
Gyroplane CFI
Joined: 10-30-2003
Location: Nipomo,California
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  • You are welcome Dave.

    It is not unusual for the descending air beneath virga to exceed 2,000 feet per minute and can reach over 4,000 feet per minute.

    The National Weather says "In certain cases, shafts of virga may precede a microburst."

    Virga can also...
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  • If you actually read and understood what you posted a link to: "Wing in Ground Effect Craft Review" you would understand how off point it is in relation to landing a gyroplane..

    You notice absolute silence because people here are tired of feeding the troll....
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  • Vance
    replied to Marion Springer flew back home today.
    in News
    I will miss my desert flower....
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  • Beauty is in the eye of the beholder.

    Having flown two seat Dominators I find them beautiful just as I find a woman with curves beautiful when some prefer thin and scrawny.

    You may have noticed that most of my pictures are taking while flying because that is how I spend most...
    After a day of training at KSMX.
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  • Vance
    replied to Vance and Kolibri Argument Thread
    According to Wikipedia: In Internet slang, a troll is a person who starts quarrels or upsets people on the Internet to distract and sow discord by posting inflammatory and digressive, extraneous, or off-topic messages in an online community (such as a newsgroup, forum, chat room, or blog) with the intent...
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  • Vance
    replied to Getting in a tall gyroplane.
    [QUOTE=jm-urbani;n1141389]Hi Vance,

    Thx a lot for sharing,

    I had not thought of passing via the back seat but it is a really intelligent idea,
    the stand you are showing is also a goog idea, the problen in my systeme is to design a ligth stand that will resist the great...
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  • Vance
    replied to Getting in a tall gyroplane.
    As I recall The Predator first flew the end of 1999 and had 191 hours on her when I purchased 12/07/2007 Dave.

    The log book is at the hangar.

    She has 1945.8 hours now and I only remember that because the transponder was just certified and I have the bill.

    That...
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  • Vance
    started a topic Getting in a tall gyroplane.

    Getting in a tall gyroplane.

    A friend asked me about getting in The Predator because he is building a tall gyroplane.

    I don't know how to post a picture on a private message so I thought I would post it here.

    It is raining so I just cropped a picture of The Predator showing the cast aluminum Van step...
    The picture I cropped it from. The step just behind and below the left fuel tank.
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  • Vance
    commented on a Visitor Message From jm-urbani
    The Predator uses a cast aluminum step from a van. It is light and strong but not very aerodynamic.
    I don't see a way to post a picture so I will start a thread.
    It is raining here and may be for about a week so I just cropped a picture and expanded it.
    I posted it in Two Place Open...
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  • jm-urbani
    jm-urbani posted a Visitor Message for Vance
    Hi Vance,
    my new bird will be as high as your's,
    I did not decide how board and is If I will have to buit a sort of small " door" ... what about the predator ?
    if you had some pictures of the system you are using to
    thanks in advance for help
    cheers
    jmi...
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  • Vance
    replied to SC Rotor Brake
    The Predator uses thirty foot, eight and a half inch chord Sport Rotors with a bicycle caliper for the rotor brake operated by a bicycle lever and held on by a tie wrap.

    Terry Brandt would not teach me in The Predator without a rotor brake so it is one of those quick solutions (a few hours)...
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  • Vance
    replied to Vance and Kolibri Argument Thread
    Why give him the power to spoil our fun Eddie?

    I have personally learned a lot I value from you Eddie and nothing I value from Kolibri.

    I have allowed the interactions to annoy some of my friends on the Rotary Wing Forum because I feel flawed advice should not go unchallenged...
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  • Vance
    replied to Do people build anymore?
    She looks beautiful jm-urbani!

    I see lots of nicely executed details.

    Thank you for sharing the fun.

    I am sure you know this and am only mentioning it for others.

    The Dragon Wings are very light and heavier blades will need changes in the layout to...
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  • In my opinion flying under or around virga is a very bad idea.

    The rain evaporates before it reaches the ground and the evaporation cools the air sending it down.

    I have flown around virga in California in the high desert and in Nevada, Utah and Arizona.

    If I can...
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  • Thank you Jeffery; as always your post is well written and on point.

    I work at providing clear, applicable explanations to my clients.

    I want them to have the tools in their tool box to manage unexpected challenges.

    If I get stuck on some point face to face with...
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  • I have done my best to answer the questions you have asked Kolibri.

    I don't know why your asking or have a reason for not answering because I have answered your questions; most several times.

    I don't know why you imagine a world that does not have boundary layers.
    ...
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  • Air moves because of pressure differential.

    Air moves from a higher pressure to a lower pressure.

    Air stops moving when the pressure equalizes.

    In my opinion a column of air doesn't need to hit something to change directions.

    It appears I can't help...
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  • It appears to me you want to have a semantics debate on what the boundaries of a down draft are.

    In my usage from a practical perspective; the down draft ends when it does not have sufficient velocity to cause my gyroplane to descend. This is generally well above the ground.

    ...
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  • I included the reference to the ground because your question was about gusts and wind shear near the runway.

    I don't know how to make my response less confusing to you.

    You frame of reference and focus seem sufficiently divergent from mine to make communication difficult....
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  • No you are not Kolibri.

    The definition I use for turbulence is the rapid change of the speed and or direction of air that I am flying through.

    As I use the words; descending air is not descending turbulence and there is no vertical or horizontal turbulence.

    You...
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