Results 1 to 16 of 16

Thread: PA18 lower Cowl support rod

  1. #1

    Join Date
    Aug 2013
    Posts
    24
    Post Thanks / Like

    PA18 lower Cowl support rod

    Click image for larger version. 

Name:	IMG_0799[8237].JPG 
Views:	174 
Size:	100.3 KB 
ID:	34431Click image for larger version. 

Name:	IMG_0820.JPG 
Views:	63 
Size:	106.8 KB 
ID:	34432
    I am as you can see hopefully finishing up on a 10 year project. Currently working on attaching the carbon fiber cowling, all seems to fit well, but the instructions for the cowl call for attaching lower cowl support arm. I scratch built this plane from northland drawings, and found a support rod at Univair, but have no idea how it attaches to the cowl. I called the cowl maker and he said he thought it went from an exhaust pipe to the lower channel of the lower cowl opening for the door. It holds the cowl in the correct vertical position. I did not think it a good idea to attach an engine part to the cowl. If some one has a picture of this and how it attaches, it would get me started again.
    BC

  2. #2
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    11,357
    Post Thanks / Like
    clamps on engine mount, then to the lower rails about 15 inches forward

  3. #3

    Join Date
    Nov 2002
    Location
    Fargo
    Posts
    728
    Post Thanks / Like
    Click image for larger version. 

Name:	IMG_1178.jpg 
Views:	106 
Size:	69.6 KB 
ID:	34434Goes from the engine mount to a bolt through the lower cowl channel

  4. #4
    aktango58's Avatar
    Join Date
    Aug 2004
    Location
    18AA
    Posts
    9,300
    Post Thanks / Like
    In the picture there is a silver brace to the exhaust pipe from the header- that one supports the exhaust.

    The brace you ask about is behind that and horizontal, black in color, and connects to the engine mount just below the muffler and crosses forward and attaches just under the forward heat muff.
    I don't know where you've been me lad, but I see you won first Prize!

  5. #5

    Join Date
    Aug 2013
    Posts
    24
    Post Thanks / Like
    Thanks all, I zoomed in on the picture and saw the black tube you are talking about. This is a one piece lower cowl and does not use the rails. Will have to make up something to attach to. Still it does not seem at the angle it is, that is would help much vertically, but will try it.
    BC

  6. #6
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    10,477
    Post Thanks / Like
    That black tube would be more effective if it were attached further up on the engine mount in a more vertical position. It is supposed to be supporting the down loads of the cowl. The one in the picture is not doing that.
    N1PA

  7. #7
    Bill Rusk's Avatar
    Join Date
    Jan 2003
    Location
    Sandpoint, Idaho
    Posts
    5,339
    Post Thanks / Like
    There is a picture and a tip here (it is the sixth picture down)

    http://www.supercub.org/forum/showth...l=1#post686232

    Hope this helps

    Bill
    Very Blessed.

  8. #8

    Join Date
    Nov 2002
    Location
    Fargo
    Posts
    728
    Post Thanks / Like
    Quote Originally Posted by skywagon8a View Post
    That black tube would be more effective if it were attached further up on the engine mount in a more vertical position. It is supposed to be supporting the down loads of the cowl. The one in the picture is not doing that.
    I agree that it would have more strength up higher but with the thrustline mod it would push the nosebowl down without cutting the tube shorter.

  9. #9
    S2D's Avatar
    Join Date
    May 2002
    Location
    Montana
    Posts
    4,207
    Post Thanks / Like
    Quote Originally Posted by PA-22/20-160 View Post
    I agree that it would have more strength up higher but with the thrustline mod it would push the nosebowl down without cutting the tube shorter.
    Guess that's something Mark should include with his STC.

    Doesn't look like its doing much there.
    I may be wrong but that probably won't stop me from arguing about it.
    Thanks AkPA/18 thanked for this post
    Likes skywagon8a liked this post

  10. #10

    Join Date
    Oct 2012
    Posts
    5,429
    Post Thanks / Like
    Here’s a view of mine. The engine mount is stationary so it’s a solid attach point. I’d like to hear more about your composite cowl.


    Last edited by stewartb; 01-04-2018 at 09:56 PM.

  11. #11

    Join Date
    Jan 2007
    Posts
    2,103
    Post Thanks / Like
    SK2
    Adjust the clamp on the engine mount to fit cowl as needed. I agree more vertical is better.
    DENNY
    Thanks 62E thanked for this post
    Likes skywagon8a liked this post

  12. #12

    Join Date
    Nov 2002
    Location
    Fargo
    Posts
    728
    Post Thanks / Like
    I looked back at some other pictures of installs I've done over the years and it looks like I've alway had the brace parallel with the exhaust pipe going into the muffler. Looked at the other side and it has a more appropriate angle so it looks like I'll have to go freeze my ass off tomorrow and get that adjusted so I can sleep better.

  13. #13

    Join Date
    Nov 2002
    Location
    Fargo
    Posts
    728
    Post Thanks / Like
    Quote Originally Posted by S2D View Post
    Guess that's something Mark should include with his STC.

    Doesn't look like its doing much there.
    Mark could spell it out word for word and not that he didn't but the world would just make a better idiot and make it null and void anyways.
    Thanks AkPA/18 thanked for this post

  14. #14
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    19,897
    Post Thanks / Like
    I have never cut the lower cowl rail support rods on any of the Thrustline modifications I have installed.
    This is my airplane.
    Click image for larger version. 

Name:	20170219_162148.jpg 
Views:	200 
Size:	241.6 KB 
ID:	34448
    One I am building
    Click image for larger version. 

Name:	20171219_162824.jpg 
Views:	264 
Size:	155.3 KB 
ID:	34449.
    Last edited by Steve Pierce; 01-05-2018 at 10:37 AM.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  15. #15

    Join Date
    Aug 2013
    Posts
    24
    Post Thanks / Like
    I completely understand now what is meant by lower cowl support. Thanks for all the replies and photos. the carbon fiber cowl is from Selkirk Aviation, very nice workmanship, great customer support, but the instructions they send along with the cowl assumes you are replacing an aluminum cowl, not building new. They list the weight of the total package at 12.5 lbs. You receive the cowl primed, and ready to paint.
    Thanks again Bruce

  16. #16

    Join Date
    Nov 2002
    Location
    Fargo
    Posts
    728
    Post Thanks / Like
    Only -26f outside this morning but I was able to fix without having to cut anything, only had to re-shim the latches.Click image for larger version. 

Name:	IMG_1734.JPG 
Views:	31 
Size:	98.7 KB 
ID:	34451

Similar Threads

  1. Lower tail brace support bracket help AD 81-06-08
    By Alaska_Rallyer in forum Cafe Supercub
    Replies: 4
    Last Post: 07-20-2013, 06:44 AM
  2. Cowl Support
    By C-YQK in forum Modifications
    Replies: 0
    Last Post: 02-26-2010, 08:25 AM
  3. Jack screw lower support
    By Marty57 in forum Experimental Cubs
    Replies: 2
    Last Post: 04-20-2006, 10:53 AM

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
  •