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  • Cierva C.30 Autogiro

    Dear all,

    out there lives a small group of connoisseurs with a liking for old (sometimes odd) drawings, as I know. Well folks, these two are for you:

    http://ntrs.nasa.gov/archive/nasa/ca...1993090361.pdf

    http://ntrs.nasa.gov/archive/nasa/ca...1993090404.pdf


    Have a nice sunday!

    Cheers,


    Juergen
    Last edited by kolibri282; 05-08-2010, 10:51 PM.
    Cheers,

    Juergen

    ..Il semble que la perfection soit atteinte..
    ....non quand il n'y a plus rien à ajouter,...
    ...mais quand il n'y a plus rien à retrancher...
    - Antoine de Saint-Exupéry -

  • #2
    Thank you, I read most of both. Of particular interest to me is the compression tailwheel. I have the spring steel type tailwheels and am interested in seeing how I can still use cable control and vertical movement of wheel.

    Right now I am assuming the rudder horn just goes up and down with the wheel and the cable just arcs up or down between rudder horn and the cable guide exiting fuselage.

    I am interested in landing near vertical so I am interested in changing out the spring I now have. I have already made the steps towards a beefed up main gear and I have up to apx 8" of travel with the air shocks.

    Thanks again, jtm
    James McNeilly
    ppsel

    Generalizations are false, generally speaking.....

    Comment


    • #3
      James,

      letting your cable just arc up and down might be a very good solution. If your distance to the tail wheel is like 8' and your tail wheel travels 4'' the stress you put on the cables is approximately 160N/mm² (23000psi) , which is very low even for a wire rope used for a bicycle break. Now this value is the upper bound that will be only reached if the wire were attached to absolutely rigid supports at both ends, which is definitely not the case. You will get the true stress value if you take into account the stiffnesses of all the parts that are loaded by the wire and that value will be much lower.


      Cheers,

      Juergen

      PS: your avatar shows a very attractive tractor gyro, perhaps you might want to have a look at this nice little bird that comes with love from Russia http://www.rotaryforum.com/forum/showthread.php?t=25862
      Last edited by kolibri282; 05-09-2010, 08:59 PM.
      Cheers,

      Juergen

      ..Il semble que la perfection soit atteinte..
      ....non quand il n'y a plus rien à ajouter,...
      ...mais quand il n'y a plus rien à retrancher...
      - Antoine de Saint-Exupéry -

      Comment


      • #4
        Here’s the C-30 that hangs from the ceiling of the Fantasy of Flight museum.
        Attached Files

        Comment


        • #5
          I read all of the first article (and liked it) and am off to read the second one.

          I guess that qualifies me as an old & odd connoisseur. :)

          Comment


          • #6
            This one is not a Cierva but positively an old/odd drawing, so here from Russia with love:
            http://hobbyport.ru/avia/a_7_3a.htm
            (scroll down to about the lower quarter of the page)

            Enjoy,

            Juergen

            (Arnie, by the end of this thread you'll receive the "Odd Old Certificate"....;-)
            Last edited by kolibri282; 05-10-2010, 11:12 AM.
            Cheers,

            Juergen

            ..Il semble que la perfection soit atteinte..
            ....non quand il n'y a plus rien à ajouter,...
            ...mais quand il n'y a plus rien à retrancher...
            - Antoine de Saint-Exupéry -

            Comment


            • #7
              I seem to remember that we have had a thread where the two bladed C-30 appeared before but can not locate it right now. So here is another piece of info on those:
              http://www.flightglobal.com/pdfarchi...0-%202069.html
              Cheers,

              Juergen

              ..Il semble que la perfection soit atteinte..
              ....non quand il n'y a plus rien à ajouter,...
              ...mais quand il n'y a plus rien à retrancher...
              - Antoine de Saint-Exupéry -

              Comment


              • #8
                Some detail pics (mostly known):
                http://www.rcuniverse.com/forum/m_89...tm.htm#9232442
                but the attachments show the complete fuselage frame and the second one seems to contain all dimensions of the tubing... so let's go ahead and build one...;-)
                http://images.rcuniverse.com/forum/u...12/Tr49967.pdf
                http://images.rcuniverse.com/forum/u...12/Rm36315.pdf
                Cheers,

                Juergen

                ..Il semble que la perfection soit atteinte..
                ....non quand il n'y a plus rien à ajouter,...
                ...mais quand il n'y a plus rien à retrancher...
                - Antoine de Saint-Exupéry -

                Comment


                • #9
                  Here’s a bit about 2-blade C30s and successor, C40 from Cierva Autogiros by Brooks.
                  Attached Files

                  Comment


                  • #10
                    Two nice pictures of a C.30 which would perhaps better be posted to the history channel but I like to collect things in one place, so here goes:
                    http://www.bbc.co.uk/arts/yourpainti...utogyro-135678
                    http://www.bbc.co.uk/arts/yourpainti...utogyro-135677
                    Cheers,

                    Juergen

                    ..Il semble que la perfection soit atteinte..
                    ....non quand il n'y a plus rien à ajouter,...
                    ...mais quand il n'y a plus rien à retrancher...
                    - Antoine de Saint-Exupéry -

                    Comment


                    • #11
                      Pictures of Albert and Gladys Batchelor, who flew one of the, probably, very small number of privately owned C-30s.
                      https://yooniqimages.com/images/deta...adys-batchelor


                      Some more nice pictures of Rolf von Bahr's C-30
                      http://www.nordicrotors.com/reg/SE-AEA/4567#0
                      http://www.nordicrotors.com/reg/SE-AEA/4567#2
                      http://www.nordicrotors.com/reg/SE-AEA/4566
                      http://www.nordicrotors.com/reg/SE-AEA/4567


                      This is the colour footage of Rolf von Bahr flying an aerial taxi service in a Swedish ski resort from this thread:
                      http://www.rotaryforum.com/forum/sho...d.php?p=622660
                      I had posted it last Christmas and just include it so that the C-30 links are a little less scattered.
                      http://footage.framepool.com/en/shot...erry-fairbanks
                      Last edited by kolibri282; 12-08-2016, 10:02 AM.
                      Cheers,

                      Juergen

                      ..Il semble que la perfection soit atteinte..
                      ....non quand il n'y a plus rien à ajouter,...
                      ...mais quand il n'y a plus rien à retrancher...
                      - Antoine de Saint-Exupéry -

                      Comment


                      • #12
                        Video of the reconstructed C-30.

                        https://www.youtube.com/watch?v=ZdWjnMkDk9U

                        Comment


                        • #13
                          Detail of C-30 hanging stick from another post.
                          Attached Files

                          Comment


                          • #14
                            The modeling site below offers a large collection of aircraft walk around galleries. One of these is the Cierva C-30:
                            https://www.net-maquettes.com/pictures/cierva-c-30/

                            The gallery home page is here:
                            https://www.net-maquettes.com/pictures/

                            There is a thread on aircraft walk arounds at the paper modelers site, which is an amazing site in its own right, offering some breathtaking modeling.

                            http://www.papermodelers.com/forum/f...-pictures.html



                            Cheers,

                            Juergen

                            ..Il semble que la perfection soit atteinte..
                            ....non quand il n'y a plus rien à ajouter,...
                            ...mais quand il n'y a plus rien à retrancher...
                            - Antoine de Saint-Exupéry -

                            Comment


                            • #15
                              Some high resolution pictures of a C-30 in the Mass museum
                              https://collection.maas.museum/object/211799
                              The description says the aircraft was built in 1934 and has been owned by Andrew Thyne Reid. The quality of the pictures is outstanding and they would make a nice wall paper for C-30 nuts...;-)

                              PS: somehow I had managed to mess up the link, thanks for the notification!
                              Last edited by kolibri282; 04-09-2018, 02:11 AM.
                              Cheers,

                              Juergen

                              ..Il semble que la perfection soit atteinte..
                              ....non quand il n'y a plus rien à ajouter,...
                              ...mais quand il n'y a plus rien à retrancher...
                              - Antoine de Saint-Exupéry -

                              Comment

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