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

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

  1. t30mg said:

    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
     
  2. Webfoot said:
    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. t30mg said:
    Well mine is a 1960 and does have flaps, so perhaps it is the same??
     
  4. skipster's Avatar

    skipster said:
    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. t30mg said:
    I am wondering more specifically about some 3/8 diagonal tubes that would go in some bays somewhere aft of the rear window??
     
  6. Darrel Starr's Avatar

    Darrel Starr said:
    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.
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    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. t30mg said:
    Thanks, that would be great to see the instructions!
     
  8. Steve Pierce's Avatar

    Steve Pierce said:
    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. Darrel Starr's Avatar

    Darrel Starr said:
    I will try to get to the hangar today & get the information.
     
  10. txpacer's Avatar

    txpacer said:
    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.

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  11. Darrel Starr's Avatar

    Darrel Starr said:
    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.
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    Last edited by Darrel Starr; 03-23-2014 at 02:49 PM.
     
  12. Steve Pierce's Avatar

    Steve Pierce said:
    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. scubber's Avatar

    scubber said:
    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. Meetwo said:
    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. scubber's Avatar

    scubber said:
    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. Meetwo said:
    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 dadís memory alive by supporting his STCís. She is very appreciative of the people who purchased his STCís 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 STCís; 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. Iíd be happy to pay the expenses for it please send me a PM if anyone can help. Thanks, Dennis
     
  17. Aerodon said:
    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. Grant's Avatar

    Grant said:
    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.
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