Thanks Thanks:  0
Page 1 of 2 12 LastLast
Results 1 to 40 of 50

Thread: J-4 Cub Coupe

  1. #1
    Clay Hammond's Avatar
    Join Date
    May 2002
    Location
    Rhinebeck NY (NY94)
    Posts
    1,297
    Post Thanks / Like

    J-4 Cub Coupe

    Anyone know a good source for J-4 parts? Or is it a "scrape 'em together from here and there" type of deal. Had a fella call our maintenance shop this morning, the Cub calls always get forwarded to me... He's restoring and looking for parts, specifically landing gear paraphernalia.

  2. #2

    Join Date
    Oct 2003
    Location
    Paducah, KY
    Posts
    408
    Post Thanks / Like
    I rebuilt a J4 7 yrs ago. Good look on the search. I had landing gear springs custom made. Had an extra set but sold them to a guy in MN. Could not find any seals for the gear, so rely on the springs for shock asorbtion. I did have the springs made 10 percent stouter.

  3. #3
    Marty57's Avatar
    Join Date
    Jan 2005
    Location
    Nipomo, Ca
    Posts
    1,378
    Post Thanks / Like
    You might try this site http://recover-your-cub.com/index.html
    Ken just finished a second J4 restoration and has lots of parts and seems to know where to find parts if they are to be found at all.
    Marty57

  4. #4
    behindpropellers's Avatar
    Join Date
    Feb 2003
    Location
    NE Ohio
    Posts
    6,698
    Post Thanks / Like

    Re: J-4 Cub Coupe

    Quote Originally Posted by Clay Hammond
    Anyone know a good source for J-4 parts? Or is it a "scrape 'em together from here and there" type of deal. Had a fella call our maintenance shop this morning, the Cub calls always get forwarded to me... He's restoring and looking for parts, specifically landing gear paraphernalia.
    Clay-

    I suggest just making the jig and fabbing the parts. Everything that you will find used will probably be junk anyway.

    Tim

  5. #5
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like

    Re: J-4 Cub Coupe

    Quote Originally Posted by behindpropellers
    Quote Originally Posted by Clay Hammond
    Anyone know a good source for J-4 parts? Or is it a "scrape 'em together from here and there" type of deal. Had a fella call our maintenance shop this morning, the Cub calls always get forwarded to me... He's restoring and looking for parts, specifically landing gear paraphernalia.
    Clay-

    I suggest just making the jig and fabbing the parts. Everything that you will find used will probably be junk anyway.

    Tim
    Tim, that's not nice, it's the only junk I have left that flies

    Glenn

  6. #6
    behindpropellers's Avatar
    Join Date
    Feb 2003
    Location
    NE Ohio
    Posts
    6,698
    Post Thanks / Like

    Re: J-4 Cub Coupe

    Quote Originally Posted by cubdriver2
    Quote Originally Posted by behindpropellers
    Quote Originally Posted by Clay Hammond
    Anyone know a good source for J-4 parts? Or is it a "scrape 'em together from here and there" type of deal. Had a fella call our maintenance shop this morning, the Cub calls always get forwarded to me... He's restoring and looking for parts, specifically landing gear paraphernalia.
    Clay-

    I suggest just making the jig and fabbing the parts. Everything that you will find used will probably be junk anyway.

    Tim
    Tim, that's not nice, it's the only junk I have left that flies

    Glenn
    Glenn-

    Would you rebuild your whole plane and then trust it to some 70 year old gear that might fail due to corrosion?

    ?????

    I'm not picking on you. I just have a feeling that the gear on J-4's is rarely replaced because you simply cannot buy new.

    Tim

  7. #7
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like

    Re: J-4 Cub Coupe

    Quote Originally Posted by behindpropellers
    Quote Originally Posted by cubdriver2
    Quote Originally Posted by behindpropellers
    Quote Originally Posted by Clay Hammond
    Anyone know a good source for J-4 parts? Or is it a "scrape 'em together from here and there" type of deal. Had a fella call our maintenance shop this morning, the Cub calls always get forwarded to me... He's restoring and looking for parts, specifically landing gear paraphernalia.
    Clay-

    I suggest just making the jig and fabbing the parts. Everything that you will find used will probably be junk anyway.

    Tim
    Tim, that's not nice, it's the only junk I have left that flies

    Glenn
    Glenn-

    Would you rebuild your whole plane and then trust it to some 70 year old gear that might fail due to corrosion?

    ?????

    I'm not picking on you. I just have a feeling that the gear on J-4's is rarely replaced because you simply cannot buy new.

    Tim

    It's even weaker on skis, so I hope mine makes it through the winter

    Glenn

  8. #8
    Jon B.'s Avatar
    Join Date
    Dec 2003
    Location
    Willmar, MN (KBDH)
    Posts
    712
    Post Thanks / Like
    Isn't this where you rely on that nice "owner-provided" phrase in the regulations?

    My K-A Champ had lots of those parts.

    Jon B.

  9. #9

    Join Date
    Sep 2003
    Posts
    6,771
    Post Thanks / Like
    My experience is limited, and I have had no trouble with the aircraft, but I hear that it is the top of the wing that needs to be strong. The landing gear is just there to pivot around after landing.

    I got three hours in one, and it seemed docile enough, but it went over on its back with another very experienced taildragger pilot in it. The guys who built it said it had been on its back four times before. It was, and really still is, a show-stopper. Wish I had taken some photos . . .

  10. #10
    Roger Peterson's Avatar
    Join Date
    May 2004
    Location
    Sweeny, Texas
    Posts
    1,454
    Post Thanks / Like
    Sounds Like it needs a name like "Hooker" since it spends so much of its time on its back.

  11. #11
    Roger Peterson's Avatar
    Join Date
    May 2004
    Location
    Sweeny, Texas
    Posts
    1,454
    Post Thanks / Like
    Sounds Like it needs a name like "Hooker" since it spends so much of its time on its back.

  12. #12
    d.grimm's Avatar
    Join Date
    Oct 2004
    Location
    toledo, oh
    Posts
    470
    Post Thanks / Like
    I flew and maintained a 39 J-4 that had Aeronca gear installed. Mr. Hatz of the Hatz Bi-Plane rebuilt this airplane and it handled well with no gear problems.
    Dave

  13. #13
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like
    All J4's are nose heavy, bad brakes on a J4 is a good thing.

    Glenn

  14. #14

    Join Date
    Jan 2012
    Posts
    3
    Post Thanks / Like
    Quote Originally Posted by Jon B. View Post
    Isn't this where you rely on that nice "owner-provided" phrase in the regulations?

    My K-A Champ had lots of those parts.

    Jon B.
    I've become quite fond of the "owner produced" regulation. The j4 was produced when it was common to use automotive parts during production. Many parts on the. J4 are specific and are uncommon to any other aircraft. And since Piper only produced 800 j4s, there just aren't many parts out there for it. However, if it is maintained and flown properly, the original parts will serve you well. And, if I ever run into a problem, I just ask Glenn.

  15. #15
    Cub Builder's Avatar
    Join Date
    Mar 2011
    Location
    North Central AR
    Posts
    650
    Post Thanks / Like
    Quote Originally Posted by J4cubcoupe View Post
    I've become quite fond of the "owner produced" regulation. The j4 was produced when it was common to use automotive parts during production.
    Absolutely right. I have a book of Cub service bulletins Dated June 1945. In some of the service bulletins from Piper it states that the necessary parts to comply should be available at most auto parts stores.

    It was a different less regulated era back then.

    -CubBuilder

  16. #16

    Join Date
    Aug 2004
    Posts
    13
    Post Thanks / Like
    A friend of mine owns a J-4 and it is serial number 1 that he wants to sell. If any one is interested let me know

    Gizmo

  17. #17
    aktango58's Avatar
    Join Date
    Aug 2004
    Location
    18AA
    Posts
    9,095
    Post Thanks / Like
    It would seem to me, that if the factory manual says 'use auto parts store part', it would conform to the TC and maintenaince standards of the plane, even in this day...

    as far as brakes, how do you get brakes on floats and skis?
    I don't know where you've been me lad, but I see you won first Prize!

  18. #18
    Cub junkie's Avatar
    Join Date
    Mar 2002
    Location
    My Moms basement
    Posts
    2,057
    Post Thanks / Like
    I have a set of wheels and brakes from a J4. The master cylinders are cast iron automotive units.

  19. #19
    Tim's Avatar
    Join Date
    Feb 2002
    Location
    Petersburgh, NY
    Posts
    3,478
    Post Thanks / Like
    If it wasn't for NAPA, Glenn would have to park his J4

  20. #20
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like
    Quote Originally Posted by Tim View Post
    If it wasn't for NAPA, Glenn would have to park his J4
    Tim I know you know AN stands for Army/Navy standards. NAPA, Navy/Army/Piper/Aeronca, it's like a double certification. Everyone always say's " runs like a Champ " Duh, how much better can you get. Now let's look at that thing that your flying. Isn't Wag Aero the mother of that thing? Talk about a lapse in birth control

    Glenn

  21. #21

    Join Date
    Feb 2004
    Location
    northeast Texas
    Posts
    54
    Post Thanks / Like

    J4 cub Coupe

    Would a J4 be comparable in value to a J3 if they were in the same condition. I am interested in one for sale but there are few to compare it with to establish some sort of value. Thanks

  22. #22
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like
    Quote Originally Posted by rowcropper View Post
    Would a J4 be comparable in value to a J3 if they were in the same condition. I am interested in one for sale but there are few to compare it with to establish some sort of value. Thanks
    Apple to apple the J3 will bring more money, $5000 more maybe, but we had one around here 5 years ago that won at LockHaven and sold for over 60 grand

    Glenn

  23. #23

    Join Date
    Sep 2003
    Posts
    6,771
    Post Thanks / Like
    On that NAPA parts source - if you are careful with log entries, AC 23-27 will help a lot.

    I now have a hundred J-4 hours, and I am delighted with the airplane and it's capabilities. I agree they are worth less than a comparable J-3 , but I am beginning to wonder why.

  24. #24

    Join Date
    Nov 2007
    Location
    HIXTON,WI
    Posts
    121
    Post Thanks / Like
    rowcropper a j4 is not as pricey as j3's. not the same plane as far as flying traits either.Ive owned one for 30 yrs.I've had it for sale for a year now and there doesn;t seem to be any interest in it. Mine's in pretty fair condition and I can't get 17,500.00 for it.

  25. #25
    Cub X's Avatar
    Join Date
    Oct 2005
    Location
    Winnipeg MB Canada
    Posts
    58
    Post Thanks / Like
    I will be selling my j4 in a few years once my sc project is getting closer to completion. I hope its not that hard to sell, mind you its an E model with the metal spars, electrics etc. Very nice airplane to fly and with the C85 its not on the ground very long. Very simular wing to the supercub less the flaps. Landing gear is definately a weak point on the J4 and they don't take side loading very well.
    Last edited by Cub X; 01-25-2012 at 08:39 PM.
    Kevin

  26. #26

    Join Date
    Dec 2006
    Location
    KTIW
    Posts
    54
    Post Thanks / Like

    J4s in AZ

    We have two J4s at Falcon Field KFFZ, both were owned by a buddy and now we have sold one to a student pilot which I am working with. It still flys like a cub and personally I think they land very nicely. Brakes suck, practically useless which can be a good thing.

    The side by side cub flying is a refreshing change. I like very much the art deco panels and cowlings. I believe its a very comfortable flying cub, not a backcountry cub by my standards or go far aircraft but sure is fun low and slow and flying around the patches!

    Parts obviously can be a problem however from time to time I have seen basket cases on Barnstormers available. I know of an excellent restored J4 that sold recently for $30K.



    Geo
    www.cubdriving.com

  27. #27

    Join Date
    Nov 2007
    Location
    HIXTON,WI
    Posts
    121
    Post Thanks / Like
    I agree with the previous posts.The coupe is a fun airplane. The gear has soft landings built into it.My wife likes it because we sit side by side. The gear seems to be the weak point,but I don't think it is that weak, it's because of the lack of parts.I have an extra set of gear both left and right just in case. Jim

  28. #28
    12Geezer2's Avatar
    Join Date
    Jan 2006
    Location
    Eau Claire, WI
    Posts
    1,065
    Post Thanks / Like
    One of my favorite cross country rides was in the J-4 of Jim's (cubx3) Not sure how the "deal" all came about but it was some sort of "sale-repo" or kinda like that. Anyway, I had the honor of flying the J-4 from Key West back to Wisconsin. Having never seen Key West or Florida or much of Georgia or Tenn. or Kentucky; at 80 mph and 1000 AGL I got a very memorable view of much of our Great Country. I must admit, I was a bit apprehensive about flying over the water and the swamplands with a 70 year old plane. The only glitch was the pilot. I find after sitting in supercubs, J-3s, and supercruisers for more than 35 years ---the left hand stick --right hand throttle of the J-4 caused me to have to "think". A landing on the grass at Ocala was interesting as there was a brisk cross wind and my thinking was almost a bit too slow, but it all worked out. The J-4 attracted much interest everywhere I stopped as few knew what it was. Just remember a good piece of rope to anchor it for starting while solo flying. Thanks for the memories, Jim.

  29. #29

    Join Date
    Dec 2006
    Location
    KTIW
    Posts
    54
    Post Thanks / Like
    Quote Originally Posted by 12Geezer2 View Post
    The only glitch was the pilot. I find after sitting in supercubs, J-3s, and supercruisers for more than 35 years ---the left hand stick --right hand throttle of the J-4 caused me to have to "think". A landing on the grass at Ocala was interesting as there was a brisk cross wind and my thinking was almost a bit too slow, but it all worked out. Jim.
    I very much understand issue with the reversal of the power and stick hands so I solved it by flying on the right side making much more comfortable for me!

    Geo
    www.cubdriving.com

  30. #30
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like
    I don't think Geezer wanted to give up the left side only brakes. I sometimes switch sides for glassy water landings to take advantage of a shore line on a short pond.

    Glenn

  31. #31

    Join Date
    Dec 2006
    Location
    KTIW
    Posts
    54
    Post Thanks / Like
    As you know original brakes are not much, basically no differential braking and I can reach them both with one foot from the right to stop at the end of the run out. I am used to the right side from instructing. No big deal which side just a preference for me.


    Geo
    www.cubdriving.com

  32. #32
    12Geezer2's Avatar
    Join Date
    Jan 2006
    Location
    Eau Claire, WI
    Posts
    1,065
    Post Thanks / Like
    Glenn: You are correct about brakes. Although the braking is typical "cub" kinda like dragging your feet, I do like to be somwhat in control. Right seat is good as long as you are in no wind. ---geezer Dan

  33. #33
    cubdriver2's Avatar
    Join Date
    Apr 2003
    Location
    upstate NY
    Posts
    9,822
    Post Thanks / Like
    If you pump the slack out of the expander tube the brakes work great, which is bad if not careful on a nose heavy plane like a J4. I run 4x25" goodyears and can lock the wheels doing a full throttle runup with 100hp and seaplane prop.

    Glenn

  34. #34

    Join Date
    Jan 2012
    Posts
    3
    Post Thanks / Like
    Quote Originally Posted by Gizmo View Post
    A friend of mine owns a J-4 and it is serial number 1 that he wants to sell. If any one is interested let me know

    Gizmo
    That should be serial # 400 if it was the first J4 off the assembly line.

  35. #35

    Join Date
    Sep 2003
    Posts
    6,771
    Post Thanks / Like
    Well, bump!

    i now own the J4 I spent 100 hours in. Much more fun in the left seat. Yeah, one gear leg is sagging. I wonder if stretching and heat treating that spring works? They cold- straighten gear legs and tail springs - maybe we just pull that spring out and stretch it?

    I did not look in there while the gear leg was off, so have no idea what I am getting into.

    Neat airplane. 22K, and it looks like a show airplane. C-85, electrics, and a wing tank. A similar J3 would be forty.

  36. #36

    Join Date
    Mar 2016
    Location
    Down low in the hills of Vermont USA
    Posts
    909
    Post Thanks / Like
    How close are Aeronca springs? A few years ago I was looking at Die springs to see if there were any current "off the shelf" springs available, I did not come to a conclusion but found that having springs wound would according to the manufacturer, "not be expensive" Not sure if that was on his scale or mine?

    Leaf springs are cold worked, I expect a stretch and heat treat cold be done. But how good is the alloy originally used and how much more just to have a new one if some other spring could not be sourced?

  37. #37
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    9,379
    Post Thanks / Like
    Bob, This is a good source for springs. https://www.asraymond.com/
    N1PA

  38. #38

    Join Date
    May 2003
    Posts
    126
    Post Thanks / Like
    I modified a pair of die springs to fit a set of J4 gear legs. Owner could not find an off the shelf exact match for the originals, so bought some that were a little big on the diameter, and turned them down on my lathe. Worked out great.
    Likes CharlieN liked this post

  39. #39

    Join Date
    Sep 2003
    Posts
    6,771
    Post Thanks / Like
    I have an 11" Sheldon, but am trying to picture holding and cutting a spring. Aren't they hardened by the heat treatment?

  40. #40

    Join Date
    Jul 2010
    Location
    Elizabeth, WV
    Posts
    530
    Post Thanks / Like
    Could you mount it between centers and grind it?
    You can't get there from here. You have to go over yonder and start from there.

Similar Threads

  1. Piper J4A Cub Coupe
    By timj4a in forum Cafe Supercub
    Replies: 55
    Last Post: 08-13-2010, 05:59 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
  •