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04-15-2014 9:18 PM

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  • Bill Rose
  • I woke up today -- or did I??
  • SW Florida
  • 500+ hours Pitts time. Former unlimited category aerobatics competitor.
  • Design Engineer


  • Posted in thread: S-1C Acro on 04-15-2014 at 02:47 PM
    Gimp,It's much easier to do what Eric describes in an S-1S than in an Extra or similar
    airplane. Even an S-2B is more difficult because the ailerons have such low break-out forces.
    Still, it takes pra...

  • Posted in thread: S-1C Acro on 04-14-2014 at 12:55 AM
    My 320-powered S-1C experience is limited to one flight but I did have a chance to fly a 180hp
    S-1C quite a bit. I found the hammerhead technique I used for the S-1S worked great in the S-1C
    as confir...

  • Posted in thread: W&B Envelope on 04-10-2014 at 01:05 PM
    Just add 100" to all the stations -- the lower leading edge would be 0" + 100" = 100" the oil
    might be -52" + 100" = 48", etc. Like you say, virtual, no need to lay it out on the floor.

  • Posted in thread: Aviat Plans on 04-10-2014 at 12:58 PM
    The concave portion of the upper rib is straightened on purpose on both the S-1-11 and Model
    12. The S-1S drawings show the concave (reflex) but as you stated, but mention the "TE
    modified" in the not...

  • Posted in thread: Aviat Plans on 04-09-2014 at 01:59 PM
    I used the published ordinates for the NACA 0012 to layout my lower ribs. No goofy fractions to
    work with, no mistakes in dimensioning the airfoil for the plans to sort through.

  • Posted in thread: W&B Envelope on 04-09-2014 at 12:32 PM
    If you're going to create a new W&B (and I would), put the new datum somewhere well in front of
    the airplane. 100" forward of the lower wing's LE would be good. Doing that keeps all the
    moment arms po...

  • Posted in thread: Stick Shakers! on 04-09-2014 at 01:07 AM
    ......if you disregard stick shaker, you get "stick pusher".....there's another article right
    there!Perfect for that low level hands-off inverted pass to close your airshow performance!

  • Posted in thread: Aviat Plans on 04-08-2014 at 12:25 PM
    ..........Would the best option be to just aim for a smooth curve and disregard the
    measurements?That's pretty much what I did on the upper wing. I wanted the airfoil to fit the
    spars and the aft 30% ...

  • Posted in thread: I Struts on 04-07-2014 at 09:58 PM
    No. The airfoil shapes dictate the curve of the 3/4" square tubes at the top and bottom of the
    I-strut. The C's I-strut would have a very flat top tube.

  • Posted in thread: Parachute question on 04-06-2014 at 08:36 PM
    ........ So I encourage everyone who flys acro to wear a parachute.I encourage everyone who
    flies akro to have a zero-tolerance policy for loose objects in the cockpit. Glasses, phones,
    keys, pens, po...