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Thread: L-21 Javron

  1. #1

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    L-21 Javron

    Let the fun begin
    Got the kit home on July 1st A Javron wide body L-21 with a couple little mods
    Just sorting everything out the first night




    Attached Images Attached Images
    Thanks stknrddr thanked for this post

  2. #2

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    Let the fun begin!
    If you get lost while flying, don't try hail a cop. Pick up the first railroad you find and hug it until you get somewhere.

  3. #3
    Lowrider
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    Wow!! Congrats on the kit's arrival!

    Every time I see one of these kits arrive I sorta wish I had bought a kit instead of just the plans...but then I've had a lot of fun and learned a lot with a plans build too. Best of luck!!
    Somewhere along the way I have lost the ability to act politically correct. If you should find it, please feel free to keep it.

    There are no new ways to crash an airplane no matter how hard you may try!

  4. #4

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    Let the work begin and the money flow! Fun stuff. Enjoy.
    Likes tcraft128 liked this post

  5. #5

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    Some progress
    Overhead Trim installed, Interior panels ready for some type of covering mostly


    DSCN1510.jpg

    DSCN1504.jpg

    DSCN1502.jpg

  6. #6

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    We're in Michigan are you located?

  7. #7

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    Quote Originally Posted by CuBob View Post
    We're in Michigan are you located?
    C04. Oceana County

  8. #8

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    I am also building about she same thing I am curious how your seat base fits in the frame,and I would test your fuel tanks with av gas for about a week the blue die finds the leaks I have now gotten three leaking tanks and one non leaky

  9. #9
    skywagon8a's Avatar
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    Quote Originally Posted by chinook View Post
    I am also building about she same thing I am curious how your seat base fits in the frame,and I would test your fuel tanks with av gas for about a week the blue die finds the leaks I have now gotten three leaking tanks and one non leaky
    I noticed your other posts on this subject and find this disturbing. Did you visually check ALL of the welded joints? What did they look like? A good visual check will often point out a potential leak location. Second, when you have a question you can pressurize the tank with a maximum of 3-5 psi air. Then with a soapy water solution brush over all the seams, look for minute air bubbles.

    Frankly I'm shocked that you have three bad tanks from Javron. Where were your leaks located? In a weld or a threaded joint?
    N1PA

  10. #10

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    I am at KBIV. It would be fun to fly up and see your progress.

  11. #11

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    Quote Originally Posted by chinook View Post
    I am also building about she same thing I am curious how your seat base fits in the frame,and I would test your fuel tanks with av gas for about a week the blue die finds the leaks I have now gotten three leaking tanks and one non leaky
    Sorry about your issues Chinook.
    Since I have only had my kit for 2 weeks now I haven't checked everything but I have mounted my seat base Whitehall fit perfectly well after trimming about .117 off the flap handle.
    this is my first build so I really don't know what to expect but it is a Kit. I for one will fit check, trim, adjust, and repeat until I am happy.

    i have worked on certified aircraft for like 30 years and I would say that this kit is very high quality. I don't expect everything to bolt together perfectly. I for one will thank Jay for putting these kits together for us, I don't know Jay very well but from what I can see he is one of those honest stand up guys that will do whatever it takes to make it right

    so chinook please start a thread of your own. And I'll post there if I run into any Issues
    Likes dgapilot, phdigger123, NoCub, StuBob, KentI liked this post

  12. #12

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    Quote Originally Posted by CuBob View Post
    I am at KBIV. It would be fun to fly up and see your progress.
    Any time Cubob. I'm building at home about 12 miles from airport
    ill send you a PM with my number

  13. #13

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    Quote Originally Posted by skywagon8a View Post
    I noticed your other posts on this subject and find this disturbing. Did you visually check ALL of the welded joints? What did they look like? A good visual check will often point out a potential leak location. Second, when you have a question you can pressurize the tank with a maximum of 3-5 psi air. Then with a soapy water solution brush over all the seams, look for minute air bubbles.

    Frankly I'm shocked that you have three bad tanks from Javron. Where were your leaks located? In a weld or a threaded joint?
    All the leaks are in welds most are in the spot welds holding the baffling in the tank one one tank it is also on the seams on the side I did a pressure test to two pounds but it was when I added Av gas in that I found the leaks

  14. #14
    WanaBNACub's Avatar
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    Very nice! I will be following this build as well. When I finish my cub rebuild I am going to be starting on a scratch built experimental!

  15. #15

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    Making some progress, have been working on the fuel system.


    IMG_1682 (1).JPG

    IMG_1684 (1).JPG

    So one question I have The line with the yellow tape on it, what is the best way to make this connection?
    I see some with a fitting and some with rubber line any suggestions

  16. #16
    skywagon8a's Avatar
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    I like aluminum fittings and used them 100% on my Cub. Piper used rubber hose with a clamp on each end. If the clamp isn't tight there is the possibility of a leak. Rubber hose can deteriorate so when the connection is in a blind area there will always be some doubt.
    N1PA

  17. #17

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    My how time flies when you're having fun. I'm getting a few things together

    Floorboards going in. Love that carbon fiber
    image.jpg

    A few other parts and pieces installed
    image.jpg

    Tail is is on and rigged and they actually move how they are supposed to
    image.jpg

    Firewall and boot cowl. Quality stuff
    image.jpg

    image.jpg

    Way two much fun
    image.jpeg

    And this his weekend I hope to finish the windshield
    and maybe get some rivets pounded in the firewall

    image.jpg

    Thats it for now. Off to have more fun
    Thanks Bill Rusk, flylowslow, Yarddart, pfjay52 thanked for this post
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  18. #18
    Bill Rusk's Avatar
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    Looks great. Thank you for posting. It is fun and interesting to see it come together.

    Bill
    Very Blessed.

  19. #19
    Steve Pierce's Avatar
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    Quote Originally Posted by avnxtek View Post


    Way two much fun
    image.jpeg


    Great picture. Looks like you are having fun. Hang on to that drill. I have one just like it but still has the blue paint on it. Made in Germany and distributed by Snap on. Can't find them anymore and it is my favorite drill.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  20. #20

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    Thanks for the photos helping me a lot . just received my kit Thursday Mike

  21. #21

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    Picking up my fuselage from Javron tomorrow! Like Bill says, I feel blessed! Can't wait to start going up!
    If you get lost while flying, don't try hail a cop. Pick up the first railroad you find and hug it until you get somewhere.

  22. #22

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    Quote Originally Posted by Mspindler View Post
    Thanks for the photos helping me a lot . just received my kit Thursday Mike
    Quote Originally Posted by flylowslow View Post
    Picking up my fuselage from Javron tomorrow! Like Bill says, I feel blessed! Can't wait to start going up!
    Great One little piece at a time and we will have them flying before we know it.

    And make sure you show us your progress

  23. #23

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    So I’m at the point of laying some cover down and looking for some advice. Starting with the elevators
    IMG_2062.JPG

    The Piper drawing shows round patches over the tie points. Most cubs I see have a 2” tape over the rib.

    Builders choice or is it best to have the tape over the entire rib


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  24. #24
    Bill Rusk's Avatar
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    Really just builders choice. I prefer the tape. A little more protection for an area that takes a lot of abuse from prop blast, dirt, water spray (if on floats) etc. and I think it looks better.

    my opinion only

    Bill
    Very Blessed.
    Thanks Beaverpilot thanked for this post

  25. #25
    Steve Pierce's Avatar
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    I agree with Bill. That fabric drums a lot and you will get less paint cracking along the ribs if you use tape instead of dollar patches.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  26. #26

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    Copy that
    And thanks for the quick response

    I may add a couple tie points also


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  27. #27

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    Where did you get your windshield fairing strips? Looks like an excellent fit from the picture.

    Thanks,
    Denny
    If you get lost while flying, don't try hail a cop. Pick up the first railroad you find and hug it until you get somewhere.

  28. #28

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    Fairing Came from Javron Not sure if He makes them or not but I'm really happy with it
    Just a few more little adjustments and it will be good to go


    WS.JPG

  29. #29

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    Another cover question
    I have the horizontal stabs and elevators covered and about to tape and the ribs between the two don’t quite line up maybe 1/2” offset so do you offset the tape to keep them true or?

    IMG_2064.JPG


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  30. #30
    skywagon8a's Avatar
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    Are you doing a two foot or a ten foot covering job?

    No seriously your attention to detail is commendable. In my opinion trying to match the tapes between the two surfaces will look better if your tapes are centered on their respective ribs. If not you will forever wish that they were. The tapes being off set on their own rib will be more obvious to your eye.
    N1PA
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  31. #31
    Steve Pierce's Avatar
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    I agree, center over the rib itself.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  32. #32

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    Thanks. I was thinking centered was the way to go.
    This being my first cover I'll probably be asking lots of questions
    hope to start on the fuselage this weekend.
    Make sure I get those parts Steve

  33. #33

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    My how Life gets in the way of progress
    Vacation, Spring Chores around the Farm, and that Work thing
    But I manage to get a few things done here and there

    Tail feathers are through second coat of Eco Fill and put up until the next step

    IMG_2072.JPG

    IMG_2145.jpg

    IMG_2156.JPG

    IMG_2157.JPG

    IMG_2158.JPG

    Upper baggage compartment and rear bulkhead

    IMG_2173.jpg

    IMG_2172.jpg

    Fuselage cover up next
    Fun Fun
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  34. #34
    Lowrider
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    Yes Sir, life does get in the way but it's worth keeping around. I have the same problem. Your doing nice work on your kit...keep it up!!
    Somewhere along the way I have lost the ability to act politically correct. If you should find it, please feel free to keep it.

    There are no new ways to crash an airplane no matter how hard you may try!

  35. #35

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    Before starting to cover the fuselage I needed a rotatory so off to the scrap pile, and this is what I came up with

    IMG_2231.jpg

    I'm Working on a position brake but for now the straps hold it in place

    IMG_2233.jpg

    Bottom skin going on
    IMG_2411.jpg



    IMG_2414.JPG

    Started on the sides and hope to get the time this week to continue

    IMG_2413.JPG

    I see fuselage tapes from minimal to over the top I have searched and can't find any guidance for them or Inspection cover placement
    Again I'm sure it is builders choice any advice would be greatly appreciated

  36. #36
    Steve Pierce's Avatar
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    Here is a link with the Piper drawing.
    http://www.supercub.org/forum/showth...cover-grommets
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  37. #37
    www.SkupTech.com mike mcs repair's Avatar
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    L-21 Javron

    Add more than they show. Under every pulley, brake masters, rudder pedals anywhere you might need to do WORK. Then only cut them out if you need to do work there.


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  38. #38
    Steve Pierce's Avatar
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    Quote Originally Posted by mike mcs repair View Post
    Add more than they show. Under every pulley, brake masters, rudder pedals anywhere you might need to do WORK. Then only cut them out if you need to do work there.


    Sent from my iPhone using SuperCub.Org
    Yep, I put inspection grommets under the brake pedal, a rectangle like Piper did under the rear stick to reach the Aileron's cables and two under the two elevator cable pulleys.
    IMG_20180702_172422.jpg
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  39. #39
    Steve Pierce's Avatar
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    I also install a grommets where the brake line comes out of the fuselage. Piper used an aluminum fairing there on the later Super Cubs which I cannot locate anywhere so my friends Chris and Tony made me some spares out of carbon fiber off a set of aluminum ones I have for this Super Cub I am rebuilding.
    IMG_20180702_173036.jpg

    IMG_20180702_173055.jpg
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers
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  40. #40

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    Thanks. That gives me something good to go on. I really like the grommet for the brake line
    do they have any more that they might let go of?

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