Likes Likes:  0
Results 1 to 18 of 18

Thread: Fuselage difference, PA-18 & PA-18-150

  1. #1

    Join Date
    Apr 2013
    Posts
    16
    Post Thanks / Like

    Fuselage difference, PA-18 & PA-18-150

    Building a pa18 and want to go from stock 90hp to 160hp. I was told that there are some 3/8 tubed that go in somewhere to make it legal.

    Can anyone show me a picture of these specifically?

    I have my 18 & 18-150 fuselages right next to each other and they look the same.

    Thanks
    Thanks Dnh98221 thanked for this post

  2. #2

    Join Date
    Dec 2002
    Location
    Fairbanks, AK
    Posts
    89
    Post Thanks / Like
    They may be the same. After about 1956 (?) they used the same fuselage for 90 and 150 cubs. My 1958 cub was a 90, but had all the welded fittings for flaps and the four extra tubes near the battery box that made it easy when I upgraded to flaps and and 150 hp. Not as easy to upgrade the wings with flaps. Do a search on this site and you'll find more discussions on the upgrades.
    Webfoot
    Have owned same cub for 38 years!!!

  3. #3

    Join Date
    Apr 2013
    Posts
    16
    Post Thanks / Like
    Well mine is a 1960 and does have flaps, so perhaps it is the same??

  4. #4
    skipster's Avatar
    Join Date
    Oct 2008
    Location
    Altamont NY
    Posts
    203
    Post Thanks / Like
    I have a 1953 90 horse. Still the original fuselage. It has the flap handle mounts on the seat, the tube for the battery, the mounts on top for the flap pulleys and the mounts for the bottom bungee spring on the elevator. My cub was the 9th from the last one made as a 1953 model.

  5. #5

    Join Date
    Apr 2013
    Posts
    16
    Post Thanks / Like
    I am wondering more specifically about some 3/8 diagonal tubes that would go in some bays somewhere aft of the rear window??

  6. #6
    Darrel Starr's Avatar
    Join Date
    Jan 2003
    Location
    Plymouth, MN
    Posts
    2,524
    Post Thanks / Like
    Early PA-18 Super Cubs had a gross weight of 1500 lb. Later ones including the PA-150 had a gross weight increase to 1750 lbs. Bill Ellis and Roger Borer developed SA292AL to allow installation of an O-320 on an early airframe. I bought that STC for N18SY, PA18-387, an early 1950 Super Cub.
    Click image for larger version. 

Name:	Page 2 of 1750 lb Gross Weight Upgrade.jpg 
Views:	393 
Size:	76.2 KB 
ID:	15282
    I have the STC , instructions and information in the hangar and can copy it if you need it. The upshot as I remember was to weld in a number of 3/8 diameter, .035 wall 4130 tubing in the empennage and installation of the PA18-150 cabane which has larger bolts than early PA18s. If you want the whole instructions, let me know and I will scan them. If you are certified and need the STC, I think Roger Borer's family is still marketing his STCs.

  7. #7

    Join Date
    Apr 2013
    Posts
    16
    Post Thanks / Like
    Thanks, that would be great to see the instructions!

  8. #8
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    22,350
    Post Thanks / Like
    It involves 3 tubes under the battery box, one on each side between the bottom and top longerons and one between the top two longerons. The STC for the tubes Darrel mentioned calls for 1/2" tubes. Your 1960 fuselage should already have the tubes.

    Sent from my SM-N900V using SuperCub.Org mobile app
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  9. #9
    Darrel Starr's Avatar
    Join Date
    Jan 2003
    Location
    Plymouth, MN
    Posts
    2,524
    Post Thanks / Like
    I will try to get to the hangar today & get the information.

  10. #10
    txpacer's Avatar
    Join Date
    Jun 2011
    Location
    Iowa Park, TX
    Posts
    869
    Post Thanks / Like
    My L-21B has the 150 hp frame and the O-320 upgrade with the Wag Aero STC. I'll be using the STC supplement to upgrade it to 1750 lb.

    Click image for larger version. 

Name:	1750 GW increase.JPG 
Views:	533 
Size:	228.4 KB 
ID:	15283

  11. #11
    Darrel Starr's Avatar
    Join Date
    Jan 2003
    Location
    Plymouth, MN
    Posts
    2,524
    Post Thanks / Like
    The Ellis & Borer STC specifies adding Four 3/8 OD, .028 wall 4130 tubing and reaming out the holes in gear fittings for the later Cabane.
    Click image for larger version. 

Name:	STC SA292AL 01 resized.jpg 
Views:	781 
Size:	609.5 KB 
ID:	15287
    Click image for larger version. 

Name:	STC SA292AL 02 resized.jpg 
Views:	590 
Size:	618.3 KB 
ID:	15288
    Click image for larger version. 

Name:	STC SA292AL 03 resized.jpg 
Views:	630 
Size:	617.0 KB 
ID:	15289
    Click image for larger version. 

Name:	STC SA292AL 04 resized.jpg 
Views:	611 
Size:	620.8 KB 
ID:	15290
    Click image for larger version. 

Name:	STC SA292AL 05 resized.jpg 
Views:	522 
Size:	471.9 KB 
ID:	15291
    Click image for larger version. 

Name:	STC SA292AL 06 resized.jpg 
Views:	826 
Size:	820.5 KB 
ID:	15292
    Click image for larger version. 

Name:	Fuselage10.jpg 
Views:	603 
Size:	172.0 KB 
ID:	15293
    Last edited by Darrel Starr; 03-23-2014 at 02:49 PM.

  12. #12
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    22,350
    Post Thanks / Like
    Now I have to look and see what STC I have that calls out 1/2" tubes there.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  13. #13
    scubber's Avatar
    Join Date
    May 2002
    Location
    Delevan,NY
    Posts
    374
    Post Thanks / Like
    Our 59' PA-18 started life w/90 Cont, came w/the specified tubing, brackets for flaps etc., even has a few tabs for the spray hopper. and 3/8" gear bolts. In talking w/the late Frank Swinehart, Sr. (the senior welder on the Super Cub line) he said from the late 50's on . . . all frames came down the line the same. In 59' only 90 hp & 150 hp were offered as options. He said our frame most likely was heading down the line to be built up as a sprayer when an order came in for the C-90. Common practice was they would pull it out of the line and mount the eng., non-balanced elevators and flapless wings. So, I would presume all later model 90's would have the correct frame tubing. Part of the Borer STC also calls for hydra sorb units, and -2- 18 gal. wing tanks. The Piper brochure calls for the "Deluxe" 90 model to have the wing tanks as well as hydra sorbs, and an elec. system. Larry C.

  14. #14

    Join Date
    Jan 2009
    Location
    New Hampshire
    Posts
    11
    Post Thanks / Like
    Darrel, thank you for posting that STC. I would like to purchase SA292AL as well as the O320 engine STC SA136AL. Could anyone tell me how to get in touch with Roger Borer's family?

    Thanks you, Dennis

  15. #15
    scubber's Avatar
    Join Date
    May 2002
    Location
    Delevan,NY
    Posts
    374
    Post Thanks / Like
    Roger's daughter, Karen Byerly, was handling the STC's for the estate. As of Feb.2011 her address was: 1088 Walnut Circle, Anchorage, Alaska 99516. Ph.907-522-1028. (Husband-Glen). On the phone she sounds like a neat lady. Got lots of family history. At the time she was battling some serious health problems. Hope all worked out. STC SA292AL (gross wt. increase) was $225.00. Turn-around time was very fast. Larry C.

  16. #16

    Join Date
    Jan 2009
    Location
    New Hampshire
    Posts
    11
    Post Thanks / Like
    Quote Originally Posted by scubber View Post
    Roger's daughter, Karen Byerly, was handling the STC's for the estate. As of Feb.2011 her address was: 1088 Walnut Circle, Anchorage, Alaska 99516. Ph.907-522-1028. (Husband-Glen). On the phone she sounds like a neat lady. Got lots of family history. At the time she was battling some serious health problems. Hope all worked out. STC SA292AL (gross wt. increase) was $225.00. Turn-around time was very fast. Larry C.
    Larry, I talked with Karen the other day, she is a very nice lady, still has health issues, and is committed to keeping her dad’s memory alive by supporting his STC’s. She is very appreciative of the people who purchased his STC’s and expressed gratitude to those who post her contact information as she is not very computer savvy. The information you posted is current. I purchased two STC’s; SA136AL and SA292AL, (prices have gone up little). She does not have Piper dwg 14468 for SA136AL and asked if someone could make a copy for her. It is a large drawing but if someone would make a copy and send it to me, (as I need it also), I will make a copy for Karen. I’d be happy to pay the expenses for it please send me a PM if anyone can help. Thanks, Dennis

  17. #17

    Join Date
    May 2006
    Posts
    322
    Post Thanks / Like
    If you look at the list of approved aircraft, it applies to PA18A and just about everything else except the straight PA18. The drawings reference PA18-105 and up. So just how does one go about demonstrating that it is applicable to a PA18? Requirements in Canada are more exact. Aerodon

  18. #18
    Grant's Avatar
    Join Date
    Mar 2002
    Location
    At Work.....
    Posts
    2,076
    Post Thanks / Like
    I'm not sure if these will help. These are what I have. Some of these are more recent revs of what many have. There is a Canadian document in there too outlining some differences.

    EDIT - It looks like these did not come through as full resolution. Let me know if you want them emailed.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	PA18_PA18A Material and Structure Differences.jpg 
Views:	1738 
Size:	87.9 KB 
ID:	51464   Click image for larger version. 

Name:	PA-18-150 Fuselage Drawing.jpg 
Views:	529 
Size:	48.8 KB 
ID:	51468  
    Attached Files Attached Files
    Thanks Hardtailjohn, av8trangie thanked for this post

Similar Threads

  1. Difference PA-18-95 and J3C-90
    By 747driver in forum Cafe Supercub
    Replies: 11
    Last Post: 01-12-2010, 11:15 AM
  2. What is the difference between.........
    By CptKelly in forum Tips and Tricks
    Replies: 8
    Last Post: 07-26-2004, 11:53 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
  •