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  1. G

    Bottom piano hinged aileron

    🤭🤣
  2. G

    Bottom piano hinged aileron

    400mph average laps around the Reno air races Sport Class course and multi class championships in a Glasair 3 with bottom hinged ailerons is encouraging regarding performance potential. George
  3. G

    Bottom piano hinged aileron

    Understood and noted regarding the adverse yaw issue. George
  4. G

    Bottom piano hinged aileron

    Thanks for the replies. I specifically selected the photo I posted because of the arched radius layout that keeps a tight and consistent gap for all deflection positions. It’s a clever arrangement. And I’ve seen versions with the balance weight at the end of the arched fwd edge, so everything...
  5. G

    Bottom piano hinged aileron

    Yes…thank you. I though I recall them being used. Glasair 2 aileron and counterweight pictured. George
  6. G

    Bottom piano hinged aileron

    Is there any fundamental reason not to have a bottom piano hinged (or similar location hinged) aileron? Most ailerons that I can recall that are mounted with piano hinge have the hinge on the top surface. Flaps are generally the opposite for more obvious reasons. Frise ailerons are bottom...
  7. G

    BLC wing small sport plane feasibility.

    Gliders ran into rules issues. They are not allowed any external power source, among other restrictions. I agree that BLC is not practical. But I will contend that the concept is capable of an improvement in performance(though small) in the right circumstance, albeit with a totally...
  8. G

    BLC wing small sport plane feasibility.

    Vigilant1, Yes I’ve read that one. And for sure BLC can benefit low speed lift (stall) greatly as the suction helps keep the flow attached at a surprisingly high angle of attack. I was just trying to keep focus on drag at cruise speed to WOT. thanks for the thoughts, George
  9. G

    BLC wing small sport plane feasibility.

    The maintenance needed in unclogging all 1000 holes every time the wings are waxed is an almost comical example of the real world limitations of the BLC issue. I’d be curious to know the ID of those particular needles FWIW. It would help greatly for me to get a feel for real world wing drag...
  10. G

    BLC wing small sport plane feasibility.

    The PX-S is cool, thanks for the link. On the glider, that’s fascinating. Shame on the disappointing result in the air. Hypodermic needles….that’s ingenious in and of itself. Talk about tiny jets of air….and that air had to be pressurized from somewhere, enough to push out all 1000 tiny...
  11. G

    BLC wing small sport plane feasibility.

    Regarding Synergy, I have, it’s been a few (bunch of) years though. Back to when John started building his project. He was at the time being a bit protective of the details behind his theories. But for sure John was thinking along similar lines regarding exhaust driven suction, along with a...
  12. G

    BLC wing small sport plane feasibility.

    FWIW, as an example, If I had 3 rows of 1mm diameter suction holes at 10mm spacing on top, and 2 rows of 1mm at 10mm spacing on bottom of each wing at 8’ along the span, I’d have the equivalent of 1.5 sq inches(9.7 sq cm) a 1.38”(3.50cm) diameter hole. I’m guessing that is not a huge volume to...
  13. G

    BLC wing small sport plane feasibility.

    I’ve read a good bit about BLC (suction specifically) on everything from jets to gliders. Much of it was theoretical, CFD analysis, wind tunnel studies, university thesis papers, the extensive work of Boerman and others. There were a number of powered plane real world tests, much of which...
  14. G

    Wood type for wood prop?

    Then there are the “Air Claw” props Maggie Warnke made after her father passed on. This was before Frank Lydic took over.
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    Wood type for wood prop?

    http://performancepropellersusa.com/Photos.htm You are probably thinking of Bernie Warnke and his “almost constant speed” props. Bernie passed on a while back. I have one of his old props for a VW. Performance Props is run by Frank Johnson, who was trained by Frank Lydick(Bernie Warnke’s son...
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    Wood type for wood prop?

    What’s the consensus on laminations of 3/32” to 1/8” beech or hard maple for a 56-58” 3300rpm (max) prop in the over 200mph small sport plane category(like in the 3 blade prop in the Bill Higdon link above)? Several prop makers not too long ago started with blanks like this(40-60 laminated...
  17. G

    Help in Diagnosing Strange Engine Operation

    I’d contact William Wynne or Dan Weseman. If they don’t have the answer you seek I’d be shocked. George
  18. G

    mixing approved species of wood

    Did you get your PM from me? I sent it about 10 days ago. I can likely help. George
  19. G

    Discussing Poplar....again

    William, Welcome. I see this was your first post. The idea of substituting in woods other than what is called for in the plans is a reacurring theme. Sitka Spruce, compared to box store Poplar, is rather expensive. But if you consider the OVERALL cost of the construction of an airplane...
  20. G

    Fastest Kit Aircraft I can Buy Now

    I agree that the NXT design is a fantastic race design. It was also designed as a two seat side by side conventional layout aircraft that several owners have had no intention of racing with, but instead as a personal plane. Granted, it is not an RV10 family touring machine. I think of it more...
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