Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 7 of 7

  1. #1

    Join Date
    Dec 2003
    Location
    Silver Springs, FL
    Posts
    171
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    4 Bladed Teeter Head

    Hi Gang, Any thoughts or evidence of a four blade teeter head being used ?? Picture a gyro with a Bensen teeter head, as if the two blades were in line with the fuselage. But instead of two blades inline, four blades are installed like an "X" atop the fuselage (considering a special mount would have to be made). Teeter hinge line would bisect blade chord lines. Has anyone experimented with this design head ?? Any thoughts on its feasibility ?? More blade area, and might ? result in a smoother operating head. Thanx for your input. Charlie Anderson

  2. #2

    Join Date
    Dec 2003
    Location
    Silver Springs, FL
    Posts
    171
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 4 Bladed Teeter Head

    Somebody...........anybody ????? Your input would be appreciated. Thanx !!! Charlie Anderson

  3. #3

    Join Date
    Aug 2004
    Location
    longwood, FL
    Posts
    469
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 4 Bladed Teeter Head

    Someone already did this, but I can't find the link. Four bladed teetering is really hard to to
    because the two blade systems have to interlock but not touch each other.
    It doesn't really have any advantages as regular flapping hinges do the
    same thing on a 3 or 4 blade head. Teetering really only makes sense on two blades.
    Blade area is not that critical, I'm flying a 1 pound model with
    two little 1.5" x 16" blades and can fly fast and slow....

  4. #4

    Join Date
    Jun 2006
    Location
    MAdridMadrid, SPAIN
    Posts
    39
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 4 Bladed Teeter Head

    Hi Charlie,

    Just in case you didnยดt know, 4-blade teetering heads have been used in full size practice. Igor Bensen did and, more recently (a few years ago), my friend Angel Serrano converted his full size gyroplane by fitting a second teetering rotor on top... He slightly reduced the rotor diameter of the standard rotors. Says he obtained 15 Km/h (9 MPH) higher cruising speed. With full sized aircraft, I guess it is easier to use two teetering rotors instead of building a complicated 4-blade articulated head which might need lead-lag dampers, etc...

    Regards,
    Emilio Cabezas
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Yw67036.jpg 
Views:	11 
Size:	94.4 KB 
ID:	1004155   Click image for larger version. 

Name:	Wr53622.jpg 
Views:	9 
Size:	62.4 KB 
ID:	1004156   Click image for larger version. 

Name:	Io28868.jpg 
Views:	9 
Size:	148.6 KB 
ID:	1004157  

  5. #5

    Join Date
    Dec 2003
    Location
    Silver Springs, FL
    Posts
    171
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 4 Bladed Teeter Head

    Hi Emilio, Thanx for the pix of the 4-blade teeter-head gyros. Seemed like a reasonable idea...............glad someone has proven it out........ Charlie Anderson

  6. #6
    AeroBalsa Mike's Avatar
    Join Date
    Oct 2003
    Location
    Frankfort, IL
    Posts
    76
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 4 Bladed Teeter Head

    Charlie,

    Check this out.
    Mike Smith
    AeroBalsa Solid Wood Airfoils

  7. #7

    Join Date
    Dec 2003
    Location
    Silver Springs, FL
    Posts
    171
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 4 Bladed Teeter Head

    Hi Mike, Thanx for posting the cool photos and link. Very clever design. Hope he has good success with his beautiful bird..............Charlie Anderson


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 11:41 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.