Pitts aileron taper

Discussion in 'Pitts Wings' started by VH-ZSJ, Apr 27, 2018.

Help Support Biplane Forum by donating:

  1. Apr 27, 2018 #1

    VH-ZSJ

    VH-ZSJ

    VH-ZSJ

    Well-Known Member

    Joined:
    Jul 13, 2012
    Messages:
    140
    Likes Received:
    66
    Hi Guys,
    Does anyone know the reason the Pitts ailerons taper on the leading edge of the tip? Obviously the rear is for the tip bow but why the leading edge? Also in my plans the rib details for the ailerons are a bit sketchy. Does anyone have a photo of an aileron rib built up before assembling the aileron to see the leading edge detail?
    Cheers,
    Sam
     
  2. Apr 27, 2018 #2

    VH-ZSJ

    VH-ZSJ

    VH-ZSJ

    Well-Known Member

    Joined:
    Jul 13, 2012
    Messages:
    140
    Likes Received:
    66
    Picture of rib detail.

    FAE34B50-396B-4F8B-ACD0-50646BCD77A6.jpg
     
  3. Apr 27, 2018 #3

    jrs14855

    jrs14855

    jrs14855

    Member

    Joined:
    Feb 28, 2011
    Messages:
    1,685
    Likes Received:
    352
    The rear wing spar tapers between rib $ 8 and rib #9. The aileron leading edge taper is to match that taper.
     
  4. Apr 27, 2018 #4

    Neil

    Neil

    Neil

    Well-Known Member Lifetime Supporter

    Joined:
    Nov 10, 2006
    Messages:
    6,116
    Likes Received:
    892
    Gender:
    Male
    Location:
    Monroe, Louisiana
    Think of the leading edge as if it were a cone. If the height of the spar tapers so must the leading edge or the gap could not be held constant to the cove. The need becomes more obvious with the symmetrical ailerons.
     
  5. Apr 27, 2018 #5

    jstreat

    jstreat

    jstreat

    Well-Known Member

    Joined:
    Feb 18, 2011
    Messages:
    642
    Likes Received:
    185
    If you replace the wing tip rib with a full rib and delay the spar taper you eliminate the aileron tapered tip rib. Not a big deviation.

    JST
     
  6. Apr 27, 2018 #6

    Redtail

    Redtail

    Redtail

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    173
    Likes Received:
    19
    Guys:
    I don't think Sam is talking about the Aileron thickness. As I read it I think he's asking about the difference in cord length at the Aileron tip.
     
  7. Apr 27, 2018 #7

    Neil

    Neil

    Neil

    Well-Known Member Lifetime Supporter

    Joined:
    Nov 10, 2006
    Messages:
    6,116
    Likes Received:
    892
    Gender:
    Male
    Location:
    Monroe, Louisiana
    Exactly. As the height of the spar is reduced the length of the cord is reduced somewhat proportionally.
     
    Kiwi likes this.
  8. Apr 28, 2018 #8

    VH-ZSJ

    VH-ZSJ

    VH-ZSJ

    Well-Known Member

    Joined:
    Jul 13, 2012
    Messages:
    140
    Likes Received:
    66
    Thanks Everyone for your reply’s. I was talking about the reduction in chord and it makes sense with the spar taper.
     

Share This Page