Results 1 to 8 of 8

Thread: Looking for a Scott 1302 Rudder Arm for my new old airplane

  1. #1
    RVBottomly's Avatar
    Join Date
    Sep 2017
    Location
    Asotin County Washington (KLWS)
    Posts
    774
    Post Thanks / Like

    Looking for a Scott 1302 Rudder Arm for my new old airplane

    I ended up buying the Commonwealth SkyRanger 185 I had been looking at for six months. It flies like a dream, climbs better than expected, and is all around fun.

    Except for one thing: she is squirrely in the extreme on pavement while taxiing. No problem with landing, but once you rely on tailwheel steering she is slow to respond, and then jerks.

    I'm pretty sure I know why. The rudder arm does not extend down far enough and the springs to the tailwheel are on a sharp angle.

    Click image for larger version. 

Name:	tail-wheel-rotated.jpg 
Views:	102 
Size:	88.4 KB 
ID:	48892

    The drawing shows it like this:

    Click image for larger version. 

Name:	tailwheel-drawing-16-146.jpg 
Views:	108 
Size:	123.5 KB 
ID:	48893

    See how the tailwheel springs are below the leaf spring instead of up at the sharp angle.

    Drawing specifies a Scott arm 1302-1. I can't find one in my online search. Does anyone know where one might be found? I suppose I could build one if necessary.

  2. #2

    Join Date
    Mar 2016
    Location
    Down low in the hills of Vermont USA
    Posts
    1,353
    Post Thanks / Like
    Another consideration might be a leaf spring with less arch or just longer to get the tail wheel further back providing you with a better steering setup.
    Thanks RVBottomly thanked for this post
    Likes mike mcs repair liked this post

  3. #3
    RVBottomly's Avatar
    Join Date
    Sep 2017
    Location
    Asotin County Washington (KLWS)
    Posts
    774
    Post Thanks / Like
    Quote Originally Posted by CharlieN View Post
    Another consideration might be a leaf spring with less arch or just longer to get the tail wheel further back providing you with a better steering setup.
    Good point. The tailwheel on there now is a Maule. The original is a Scott 2000. It does look like the leaf spring is a bit aggressive.

  4. #4

    Join Date
    Mar 2016
    Location
    Down low in the hills of Vermont USA
    Posts
    1,353
    Post Thanks / Like
    I looking at the image zoomed in a bit, I prefer to have the TW pivot as vertical as possible so the plane is not trying to "fall off" to either side. You probably have no spring shops that can bend springs to your drawings near by but a set of springs made for that plane will tame it down considerably.

  5. #5
    RVBottomly's Avatar
    Join Date
    Sep 2017
    Location
    Asotin County Washington (KLWS)
    Posts
    774
    Post Thanks / Like
    Quote Originally Posted by CharlieN View Post
    I looking at the image zoomed in a bit, I prefer to have the TW pivot as vertical as possible so the plane is not trying to "fall off" to either side. You probably have no spring shops that can bend springs to your drawings near by but a set of springs made for that plane will tame it down considerably.
    Thanks for the idea. We have a custom 4x4 shop that might be able to help. I've seen some pretty amazing suspensions come out of his shop.

  6. #6
    RVBottomly's Avatar
    Join Date
    Sep 2017
    Location
    Asotin County Washington (KLWS)
    Posts
    774
    Post Thanks / Like

    steering arm play

    Another question: how much play is normal on the tailwheel arm?

    Here's a video of what I have:


  7. #7

    Join Date
    Mar 2016
    Location
    Down low in the hills of Vermont USA
    Posts
    1,353
    Post Thanks / Like
    My belief is there should be "little to no" free play inside the TW. But is is not uncommon to see the amount you have.

    My opinion, Or lets say, If it were mine,

    I would find a shop that can De-arch that spring so the caster is proper.

    Disassemble the TW to see in there are any worn parts, "there might not be any"
    But due to the excess arch in the spring that TW is probably beating itself to death.

    Is there any freeplay at the rudder arm?

  8. #8
    RVBottomly's Avatar
    Join Date
    Sep 2017
    Location
    Asotin County Washington (KLWS)
    Posts
    774
    Post Thanks / Like
    No play at the rudder arm. Snug.

Similar Threads

  1. Sam's Airplane in transition to Dave's airplane....
    By Sam Beckett in forum Take Action Jackson
    Replies: 47
    Last Post: 05-03-2006, 09:49 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •