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jm-urbani
jm-urbani
Junior Member
Last Activity: Today, 08:37 AM
Joined: 12-21-2010
Location: French Riviera
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  • jm-urbani
    replied to Tandem double hang test
    I have made and used my own spreadsheet but your's seems to be really nice, too late coz my bird is already on it's wheels .. next time I'll try yours

    it is wise to have used the propeller centre of rotation as a reference, I set my reference on the ground and ahead of the gyro drawing,...
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  • normal aircraft design/ historical error

    Old and proper aircraft design :







    Historical Error :

    ...
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  • jm-urbani
    replied to Tandem double hang test
    true but if we go in this direction, in the attempt of explaining all of this to newbies, we should talk about all the moment forces that are acting in different directions ending up in the final attitude of the gyro,

    Rotor Drag expression I used wass just an "image" to try to...
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  • just to let you know about the french law
    gyros are ultraligths, they can take off with a total weight on 450 kg ( 500 kg very soon)
    as for the flying rules we have the same rights and duties then all other aircrafts, but no ifr and no night VFR, one tens of the biggest airports are not...
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  • jm-urbani
    replied to Tandem double hang test
    Hi ladsí,

    thank you for your explanations, I'll try to make a video or pictures for the community
    i need to get used to do this test coz I have made it possible to raise the engine up to 110 mm in few minutes, pilot and passenger seats can be shifted horizontally in a few minutes...
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  • jm-urbani
    started a topic Tandem double hang test

    Tandem double hang test

    Hi All,
    I am preparing for my double hang test to be done in a month or 2, I 'll see if my calculations are ok or not hahaha
    I understood that by hanging anything by two different points at 2 different angles from the CoG one could draw 2 lines and that the CoG is situated on where the lines...
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