Thanks Thanks:  0
Likes Likes:  0
Results 1 to 37 of 37

Thread: Super Cub Tanks in a PA12?

  1. #1

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    405
    Post Thanks / Like

    Super Cub Tanks in a PA12?

    Anyone have a 337 or STC for super cub tanks in a PA12?....There's a guy up here that during annual his IA noticed Supercub tanks in his wings and grounded the plane....I guess he stripped the fabric and the guy is stuck recovering his wings. I don't know this guy personnaly he's a friend of a friend....but it seemed like something could have been done....they stripped fabric off that was less than 10 years old!

  2. #2

    Join Date
    Apr 2007
    Location
    Kingsburg, CA
    Posts
    1,256
    Post Thanks / Like
    Should be able to pull the tanks without taking the fabric out unless there was something else wrong withe the fabric....I'm sure someone has done this before but nobody I know of.

  3. #3

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    405
    Post Thanks / Like
    Too late....the IA ripped all of the good fabric off.

  4. #4
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by Dan Gervae View Post
    Too late....the IA ripped all of the good fabric off.
    hopefully with permission and a plan?

  5. #5
    CubDriver218's Avatar
    Join Date
    Sep 2007
    Location
    Minnesota
    Posts
    626
    Post Thanks / Like
    I'd do this in steps
    1. Get a new IA
    2. Try to get the old one to pay for the damage if he did ripped the fabric off without prior permission from the owner
    3. Figure out which tanks you want. Now would be the time to change.
    The whole situation sounds like a bummer. I believe I have PA-18 Fuel tanks in my -12. Or maybe I just have the wing root fuel gauges? I'd be happy to share my paperwork if it'd help you out.
    Fast or slow, always low, freedom of flight soothes the soul.

  6. #6
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    does dakota cubs 24 gallon cub tanks stc cover the 18 gallon also? field?

  7. #7
    StewartB
    Guest
    The only PA-12 I ever knew that had PA-18 tanks belonged to Gary Landes. I don't know who owns that plane now or whether the old approval would be helpful with the new FA procedures. There must be a way to get it approved and that should be considerably easier for the IA in question to do since he's now opened the wings up for easy inspection.

    SB

  8. #8
    Amy's Avatar
    Join Date
    Jul 2009
    Location
    WI/MN/SD
    Posts
    664
    Post Thanks / Like
    Quote Originally Posted by mike mcs repair View Post
    does dakota cubs 24 gallon cub tanks stc cover the 18 gallon also? field?
    Nope, only the 24 gallon tanks are STC'd for the PA-12.

    http://dakotacub.com/images/me%20-%20fuel%20tanks.pdf

  9. #9

    Join Date
    Sep 2004
    Location
    Illinois & Wisconsin
    Posts
    600
    Post Thanks / Like
    I don't see a 24 gal. tank on the page Amy posted. Is there such a tank?

    Also, are the 23 gal. tanks for a PA 12 drop in, or do you have to modify the wing.

  10. #10
    Amy's Avatar
    Join Date
    Jul 2009
    Location
    WI/MN/SD
    Posts
    664
    Post Thanks / Like
    They're termed 24-gallon tanks but placarded for 23. Not sure where the disparity came from, but you'll hear both terms. I should ask where it comes from when I am out at DCA next.

  11. #11
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by Amy View Post
    Nope, only the 24 gallon tanks are STC'd for the PA-12.

    http://dakotacub.com/images/me%20-%20fuel%20tanks.pdf

    see.... theres an easy add on to your stc to include your 18 gallon tanks, since structural changes to wing are the same other than end rib position and lid....

  12. #12
    Amy's Avatar
    Join Date
    Jul 2009
    Location
    WI/MN/SD
    Posts
    664
    Post Thanks / Like
    Quote Originally Posted by mike mcs repair View Post
    see.... theres an easy add on to your stc to include your 18 gallon tanks, since structural changes to wing are the same other than end rib position and lid....
    Will have to check why we didn't do that--might be one of those "who would want 18 when you could have 24?" theories.

  13. #13
    Amy's Avatar
    Join Date
    Jul 2009
    Location
    WI/MN/SD
    Posts
    664
    Post Thanks / Like
    Got an answer for the 24- vs. 23-gallon disparity--the STC application said 24, but they actually hold 23.75, so we advertise 23. The part number, you will notice, has a -24G which stands for 24 gallons. Had to pick that stuff out beforehand. So, there's a little curiosity for you!

  14. #14

    Join Date
    Sep 2004
    Location
    Illinois & Wisconsin
    Posts
    600
    Post Thanks / Like
    Amy, do they come with front and back fuel ports and fittings for wing root sight gauges for the headerless fuel system?
    Last edited by Paul Heinrich; 03-21-2011 at 06:54 PM. Reason: spelling

  15. #15
    180Marty's Avatar
    Join Date
    May 2004
    Location
    Paullina, Ia
    Posts
    2,025
    Post Thanks / Like
    Back in the 1980's when I owned a PA12, I visited a guy in Chanhassen MN that was rebuilding a PA 12 and he was putting in 18 tanks---I think it was legal at the time.

  16. #16
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by Amy View Post
    Will have to check why we didn't do that--might be one of those "who would want 18 when you could have 24?" theories.
    many people don't like big tanks, but would love to get rid of the leaky -12 tanks.....

  17. #17

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    405
    Post Thanks / Like
    I'll have to ask for details...I think the owner allowed the tear down trusting that the IA knew what was up....he did go and pick up the plane in pieces with a trailer and is looking for help recovering his wings from a friend of mine....I just thought I'd do some research to see if maybe this could have been solved with an STC or 337. I'l find out some details. I would have never let the fabric be removed until I knew there was an unsolvable problem I feel bad for this guy. I would like to help him if I can....he's out a considerable sum of money. Sometimes going for an annual can be costly....ouch.

  18. #18
    Amy's Avatar
    Join Date
    Jul 2009
    Location
    WI/MN/SD
    Posts
    664
    Post Thanks / Like
    Quote Originally Posted by Paul Heinrich View Post
    Amy, do they come with front and back fuel ports and fittings for wing root sight gauges for the headerless fuel system?
    Sight gauges and front and rear ports yes (99.9% sure; was just looking at the drawing a few weeks ago) but will double-double check in the morning I'm learning tons and still need to check to make sure all that info got filed correctly sometimes!

    Mike, if I ever figure out how Mark's brain works, I will write a book . . .

  19. #19
    gpepperd's Avatar
    Join Date
    Aug 2005
    Location
    Wasilla, Alaska
    Posts
    212
    Post Thanks / Like
    I have a 337 that covers a PA-20 tank in a 12 wing. That is the same tank as a cub except no sight gauges. Let me know if it will do any good or if it's truely "too late". Greg
    Good judgment comes from experience, and a lot of
    that comes from bad judgment. will rodgers

    "Anyone who would give up liberty for safety deserves neither" Ben Franklin

  20. #20
    CubDriver218's Avatar
    Join Date
    Sep 2007
    Location
    Minnesota
    Posts
    626
    Post Thanks / Like
    What is the difference between the -12 tanks and teh -18 tanks. Now I'm curious as to which I have in my -12 I have 18 gallons a side with my gauge in the wing root.
    Fast or slow, always low, freedom of flight soothes the soul.

  21. #21

    Join Date
    Apr 2007
    Location
    Kingsburg, CA
    Posts
    1,256
    Post Thanks / Like
    -12 tanks are made from ternplate, soldered and are know to crack. -18 tanks are not. I think the -18 tanks have a different shape, with more rounded corners.

  22. #22
    180Marty's Avatar
    Join Date
    May 2004
    Location
    Paullina, Ia
    Posts
    2,025
    Post Thanks / Like
    Now I'm curious as to which I have in my -12
    Richard, I can't remember for sure, but wouldn't be surprised if you have PA 18 tanks.

  23. #23
    windy's Avatar
    Join Date
    Dec 2005
    Location
    Utah
    Posts
    630
    Post Thanks / Like
    My old PA-12 tanks held 19 gallons per side, as opposed to 18 gallons in the PA-18 tanks. Switched to Dakota Cub wings & tanks that hold 23.7 gallons each.

    windy

  24. #24

    Join Date
    Dec 2009
    Location
    Keweenaw, MI
    Posts
    80
    Post Thanks / Like
    Hey, that's me. I troll this site regularly and I've asked a question or two already. The fabric was 15 years old. The tanks are atlee dodge PA18 tanks. There was a discrepancy to the STC as they rivited the leading edge wrap instead of using screws. My plan is to put PA12 atlee tanks, screw the wrap, and refabric with the help of some friends. I look forward to meeting you Dan and I appreciate the help. I will be meeting with Dean and Frank today to discuss a plan of action.
    The early bird gets the worm, but the second mouse gets the cheese.

  25. #25
    StewartB
    Guest
    Hey, I remember that thread. Not at all what this thread led me to think.

    http://www.supercub.org/forum/showth...ee-Dodge-tanks

    Stewart

  26. #26

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    405
    Post Thanks / Like
    Hey Tom, I look forward to meeting you as well....Dean told me what happened...well, as best he could, so I got curious...Bummer....I'll help too if I can. I'm around there quite a bit. We gotta get you flying so we can go have some fun! I'm giving instruction to a guy from Dollar Bay...he just bought an Avid and he'll be in Joe M's hangar. See you there!
    Last edited by Dan Gervae; 03-23-2011 at 01:58 PM.

  27. #27
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by streetreamer View Post
    ...... The tanks are atlee dodge PA18 tanks.

    Quote Originally Posted by streetreamer View Post
    ......There was a discrepancy to the STC as they rivited the leading edge wrap instead of using screws.......
    what do you mean by these two?????

  28. #28

    Join Date
    Dec 2009
    Location
    Keweenaw, MI
    Posts
    80
    Post Thanks / Like
    The tanks are placarded for a PA18 which I am led to believe have a different twist than the 12 tanks.??? To compensate for the different amount of washout. My washout was somewhere between a 12 and an 18. Closer to specs than others I know of. The stc states you need 3 screws between each rib on the reinforcement aluminum wrap around the leading edge. Mine has rivits.
    The early bird gets the worm, but the second mouse gets the cheese.

  29. #29
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by streetreamer View Post
    The tanks are placarded for a PA18 which I am led to believe have a different twist than the 12 tanks.??? To compensate for the different amount of washout. My washout was somewhere between a 12 and an 18. Closer to specs than others I know of. The stc states you need 3 screws between each rib on the reinforcement aluminum wrap around the leading edge. Mine has rivits.
    Ah. Thought you meant -18 18 gallon cub tanks in -12. You mean atlee 30 gal tanks? Yes the strips are pop riveted on on those..z

  30. #30

    Join Date
    May 2008
    Location
    Upper Peninsula of Michigan
    Posts
    405
    Post Thanks / Like
    Just curious...why did he say you had to remove all of the fabric....Couldn't you just do the tank area and after you resolve the STC problem recover that portion?...Hope that's not a stupid question.

  31. #31

    Join Date
    Sep 2004
    Location
    Illinois & Wisconsin
    Posts
    600
    Post Thanks / Like
    Just curious, how would one go about riveting the leading edge aluminum to the spar cap where the three screws should go? How would you buck them? Were they pop rivets?

    Please post pictures of that.

    Isn't it true that when you install atlee's tanks, the twist is locked in by the full wrap leading edge. If the wrong tanks were installed, then the wrong twist was locked in. If the wrong twist was locked in, you would have to remove the entire fabric to reinstall the leading edge with the correct twist for the correct tanks. Yes?
    Last edited by Paul Heinrich; 03-23-2011 at 06:35 PM. Reason: spelling

  32. #32
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by Paul Heinrich View Post
    Just curious, how would one go about riveting the leading edge aluminum to the spar cap where the three screws should go? How would you buck them? Were they pop rivets?

    Please post pictures of that.

    Isn't it true that when you install atlee's tanks, the twist is locked in by the full wrap leading edge. If the wrong tanks were installed, then the wrong twist was locked in. If the wrong twist was locked in, you would have to remove the entire fabric to reinstall the leading edge with the correct twist for the correct tanks. Yes?
    Sorry meant the entire kit is pop riveted in, but yes screws used to screw into spar caps

  33. #33

    Join Date
    Dec 2009
    Location
    Keweenaw, MI
    Posts
    80
    Post Thanks / Like
    I can post pictures of the rivits when I'm near a computer, right now I'm on my phone. The reason for pulling the fabric was to adjust the washout and to put in the screws. I checked other 12's and mine was closer to specs than any other one I checked though. The mechanic can justify why the fabric was pulled. There are reasons why I pulled my plane out of his shop. The mainreason is I don't have $30,000 to redo everything so it may sit a while. With the help of an A&P IA friend Who has a lot of experience with cubs, I hope this thing flies again this year after fixing the discrepancies. I'm trying to stay positive about the whole thing.
    The early bird gets the worm, but the second mouse gets the cheese.

  34. #34
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    Quote Originally Posted by streetreamer View Post
    .....The reason for pulling the fabric was to adjust the washout and to put in the screws.......
    <raised eyebrows> ????

  35. #35
    FloatCFI's Avatar
    Join Date
    May 2011
    Location
    Upper Michigan
    Posts
    1
    Post Thanks / Like
    Hi Dan, I just joined and saw your name on here. Now there's two of us from Iron River.//Jerry Dahl

  36. #36
    behindpropellers's Avatar
    Join Date
    Feb 2003
    Location
    NE Ohio
    Posts
    6,691
    Post Thanks / Like
    Quote Originally Posted by Richard Deblack View Post
    What is the difference between the -12 tanks and teh -18 tanks. Now I'm curious as to which I have in my -12 I have 18 gallons a side with my gauge in the wing root.
    The PA-18 wing design is different than the PA-12 in the first bay.

    I have not looked at a drawing lately, but I think the twist in both wings is the same.


    Tim

  37. #37
    windy's Avatar
    Join Date
    Dec 2005
    Location
    Utah
    Posts
    630
    Post Thanks / Like
    PA-12 tanks out of the factory were 19 gallons per side with the gauges sticking out the bottom of the wings.

Similar Threads

  1. fuel tanks for exp PA12
    By dougsappllc in forum Cafe Supercub
    Replies: 6
    Last Post: 12-28-2009, 10:57 PM
  2. fuel tanks pa12
    By leon tallman in forum Modifications
    Replies: 27
    Last Post: 10-17-2004, 03:31 AM
  3. PA12 fuel tanks
    By Michael Tracy in forum Super Cub Sick Bay
    Replies: 5
    Last Post: 08-21-2002, 08:33 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
  •