Page 2 of 4 FirstFirst 1234 LastLast
Results 41 to 80 of 135

Thread: L-21 Javron

  1. #41
    G44's Avatar
    Join Date
    Oct 2011
    Location
    SW Michigan
    Posts
    443
    Post Thanks / Like
    A thought.... Buy extra inspection covers and paint them when you paint the rest of the airplane then put them aside so if you do need to cut a hole where you have a grommet you will have a cover all ready to go.

    Kurt
    Likes DENNY liked this post

  2. #42

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Starting to look like something

    Click image for larger version. 

Name:	image.jpeg 
Views:	145 
Size:	202.7 KB 
ID:	37928

    Click image for larger version. 

Name:	image.jpeg 
Views:	94 
Size:	112.4 KB 
ID:	37929

    Click image for larger version. 

Name:	image.jpeg 
Views:	114 
Size:	132.4 KB 
ID:	37930

    So do I use a 2 or 3 inch tape down the spine?

    sofar so good. Fun fun
    Likes RaisedByWolves liked this post

  3. #43
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    9,269
    Post Thanks / Like
    https://www.faa.gov/documentLibrary/...-1B_w-chg1.pdf

    Page 2-9
    (5) For an overlapped and doped seam on the perimeter of a wing (except a leading edge), perimeters of wing control surfaces, perimeters of empennage surfaces, and all areas of a fuselage, on aircraft with a Vne speed up to and including 150 mph, overlap the fabric 1 inch and cover with a finishing tape that is at least 3 inches wide, centered on the outside edge of the overlap seam.
    N1PA

  4. #44

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Quote Originally Posted by skywagon8a View Post
    https://www.faa.gov/documentLibrary/...-1B_w-chg1.pdf

    Page 2-9
    (5) For an overlapped and doped seam on the perimeter of a wing (except a leading edge), perimeters of wing control surfaces, perimeters of empennage surfaces, and all areas of a fuselage, on aircraft with a Vne speed up to and including 150 mph, overlap the fabric 1 inch and cover with a finishing tape that is at least 3 inches wide, centered on the outside edge of the overlap seam.

    Thanks for the reply. Skywagon8a
    43.13-1B acceptable methods and techniques and practices. Used when no manufactures guidance is provided
    i see the drawing referenced above thanks Steve. Shows 2". I also have an L21 drawing that doesn't specify at least I can't find it anywhere.
    Just trying to see what others have done.
    Again my first kit lots of dumb questions to come

  5. #45
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    9,269
    Post Thanks / Like
    Quote Originally Posted by avnxtek View Post
    Click image for larger version. 

Name:	image.jpeg 
Views:	114 
Size:	132.4 KB 
ID:	37930 So do I use a 2 or 3 inch tape down the spine?
    Measure from the center line of the spine to the edge of the overlap. If it's close to 1 inch you will be happier using the 3" tape as it will blend in smoother with the fabric.

    Tape the leading edge of the fin first so that the fuselage spine tape will overlap the fin's tape. Blending the fuselage/fin junction can be a challenge.
    N1PA

  6. #46

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Well I think she is covered
    Click image for larger version. 

Name:	image.jpg 
Views:	111 
Size:	278.0 KB 
ID:	38560

    Click image for larger version. 

Name:	image.jpg 
Views:	117 
Size:	272.3 KB 
ID:	38561
    Click image for larger version. 

Name:	image.jpg 
Views:	117 
Size:	225.8 KB 
ID:	38563
    Click image for larger version. 

Name:	image.jpg 
Views:	96 
Size:	190.2 KB 
ID:	38562
    Click image for larger version. 

Name:	image.jpg 
Views:	111 
Size:	95.7 KB 
ID:	38564

    On to the next phase.

  7. #47

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Question for the Stewart System Experts

    The latest manual Tells me to cut the E610 EcoBond 3-1 with distilled water and apply over the fabric. I did this with the Tail feathers and am happy with the results.
    The manual also says that you can apply EcoFill without EcoBond First ??
    From what I have been able to gather this change was made to improve cooler temp. application

    All of the videos I have seen go straight to EcoFill

    So Do I Don't I?
    What have others done?
    Any other explanations for this manual change?

  8. #48

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    wow must not be many Stewart systems users

    anyway I went buy the book and got to the second brush on coat of Eco fill
    Click image for larger version. 

Name:	image.jpeg 
Views:	77 
Size:	214.7 KB 
ID:	38743

    Click image for larger version. 

Name:	image.jpg 
Views:	74 
Size:	287.8 KB 
ID:	38744

    First Eco bond to fill the weave of the fabric. Brushed on in multiple directions and a very thin coat this stuff will run!
    I kept the surface flat until it tacked up

    Click image for larger version. 

Name:	image.jpg 
Views:	78 
Size:	146.9 KB 
ID:	38745

    Click image for larger version. 

Name:	image.jpg 
Views:	85 
Size:	219.9 KB 
ID:	38746

    Click image for larger version. 

Name:	image.jpg 
Views:	80 
Size:	280.2 KB 
ID:	38747

    Click image for larger version. 

Name:	image.jpg 
Views:	86 
Size:	215.4 KB 
ID:	38748

    Eco fill goes on real nice again I kept the surface flat until tacky and moved on
    I'm learning as I go and I hope this might help someone

  9. #49
    Gordon Misch's Avatar
    Join Date
    Dec 2003
    Location
    Toledo, Wa (KTDO)
    Posts
    3,325
    Post Thanks / Like
    First coats have to go on light, or they will for sure run! Furthermore, I've learned the hard way to not depend on flat orientation to accommodate putting the material on heavy. I ran into adhesion issues doing that.

    I've found that with Stewart's if I don't try to rush it, it works great. Fortunately EcoFill sands pretty well if (when!) needed.
    Gordon

    N4328M KTDO
    My SPOT: tinyurl.com/N4328M (case sensitive)

  10. #50
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    9,269
    Post Thanks / Like
    Quote Originally Posted by avnxtek View Post
    Question for the Stewart System Experts
    Quote Originally Posted by avnxtek View Post
    wow must not be many Stewart systems users

    anyway I went buy the book and got to the second brush on coat of Eco fill
    Your first question was for experts. I've used it and like it but am certainly not an expert. I would need to get out the book again when I use it the next time. It's different than nitrate dope on Irish linen which is what I'm used to.
    N1PA

  11. #51

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Quote Originally Posted by skywagon8a View Post
    Your first question was for experts. I've used it and like it but am certainly not an expert. I would need to get out the book again when I use it the next time. It's different than nitrate dope on Irish linen which is what I'm used to.
    Yup should have used the words Stewart System users.
    Maybe I would have a few more responses

    going by the book and learning the system. Happy with the results sofar

    it's all fun

  12. #52

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    What a great day!
    Looks like I get to start on the cowling this weekend

    Click image for larger version. 

Name:	engine.jpg 
Views:	99 
Size:	73.4 KB 
ID:	39135


    Just more Fun
    Likes mike mcs repair, Jim A. liked this post

  13. #53

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    I need to finish my upholstery project before I move on the the Engine installation

    This takes some time but is still fun

    Click image for larger version. 

Name:	IMG_2592.jpg 
Views:	79 
Size:	100.0 KB 
ID:	39225

    All Weekend and I just got the back seat together
    Click image for larger version. 

Name:	IMG_2598.jpg 
Views:	88 
Size:	100.8 KB 
ID:	39226

    And the harnesses came in this week

    Click image for larger version. 

Name:	IMG_2596.JPG 
Views:	196 
Size:	261.1 KB 
ID:	39227

    Now on to the front seat
    Thanks Steve Pierce thanked for this post

  14. #54
    flylow's Avatar
    Join Date
    Oct 2013
    Posts
    36
    Post Thanks / Like
    Cool seats! You making everything on this cub

    Fun watching your build.
    Likes mike mcs repair liked this post

  15. #55

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Quote Originally Posted by flylow View Post
    Cool seats! You making everything on this cub

    Fun watching your build.

    Thanks Flylow
    It is my goal to do everything possible myself with this build
    Likes mike mcs repair liked this post

  16. #56

    Join Date
    Apr 2013
    Location
    Cloquet, MN
    Posts
    135
    Post Thanks / Like
    Nice job. Those look great! Envious of people with upholstery and sewing skills. Two inherited sewing machines in my shop, need to one day get results half as good as yours. Very nice.
    Likes mike mcs repair liked this post

  17. #57
    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 Jim A. View Post
    Nice job. Those look great! Envious of people with upholstery and sewing skills. Two inherited sewing machines in my shop, need to one day get results half as good as yours. Very nice.
    When I was 17 I made a complete new interior for a car I was given before I even tried to get it running. Luckily my step fathers friend had a boat upholstery shop and gave me a few pointers and ordered the material for me in Naknek. My mom taught me how to sew when I was 5. Only one rule don’t sew over a finger. That was about it. Still have her sewing machine. And a monster fast big singer from the sail boat days.


    Sent from my iPhone using SuperCub.Org mobile app

  18. #58

    Join Date
    Apr 2013
    Location
    Cloquet, MN
    Posts
    135
    Post Thanks / Like
    Sounds familiar. Mom and I made the headliner for my first car, a 53' Buick. The machines I have are her old units. I was a hammerhead when I was younger, results were the most important, learning and remembering how to repeat them 30yrs or so later seemed less important at the time. Mom and Dad are still around, hoping to get them involved in my snail's pace build. Again, very nice stuff avnxtek!

  19. #59

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Thanks Jim, Mike (and don't look to close)
    i remember doing some projects with Mom when I was young then in the 90s we had a 172C and the seats were falling apart so I got the old machine from Mom and made covers, at that time making them was the only option and they turned out pretty good. Still have that machine also. I found this big machine for this project and I think I could sew plywood together with this thing! And it can be way to fast if you don't watch it. Just like most things Prep,Prep, Prep and patience and you can do it.

    and it's all fun
    Likes mike mcs repair, Jim A. liked this post

  20. #60

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Well got the front seat finished up today

    Click image for larger version. 

Name:	image.jpeg 
Views:	168 
Size:	244.0 KB 
ID:	39369

    Click image for larger version. 

Name:	image.jpg 
Views:	90 
Size:	79.0 KB 
ID:	39370

    More fun begins tomorrow

  21. #61

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    A little more progress
    Click image for larger version. 

Name:	image.jpeg 
Views:	134 
Size:	241.3 KB 
ID:	39518
    Likes jrussl, Riverking liked this post

  22. #62

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Some fun with the cowling

    Top supports installed

    Click image for larger version. 

Name:	image.jpeg 
Views:	85 
Size:	201.5 KB 
ID:	39645

    Click image for larger version. 

Name:	image.jpeg 
Views:	75 
Size:	206.7 KB 
ID:	39646

    With the 2" lowered mount the Vetterman exhaust is a little tight
    I'm amazed at the quality of experimental parts. This exhaust is a work
    of art
    Click image for larger version. 

Name:	image.jpeg 
Views:	79 
Size:	174.1 KB 
ID:	39647

    With my poster board mock up. I placed the lower cowl vents
    a little foreword to give me some clearance about a 1/2 inch

    Click image for larger version. 

Name:	image.jpeg 
Views:	79 
Size:	204.4 KB 
ID:	39648

    Click image for larger version. 

Name:	image.jpeg 
Views:	74 
Size:	75.2 KB 
ID:	39649

    Click image for larger version. 

Name:	image.jpeg 
Views:	68 
Size:	198.5 KB 
ID:	39650

    A few little adjustments and I'll start on the real thing
    Thanks stknrddr thanked for this post

  23. #63
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    9,269
    Post Thanks / Like
    avnxtek,
    You should increase the amount of belly in your lower cowl. This will give you more clearance with the exhaust and also a larger hot air exhaust at the bottom aft end. You may even be able to eliminate those belly scoops with the use of a lip just ahead of the large opening.
    N1PA
    Likes DENNY, mike mcs repair liked this post

  24. #64
    skywagon8a's Avatar
    Join Date
    Mar 2008
    Location
    SE Mass
    Posts
    9,269
    Post Thanks / Like
    Quote Originally Posted by avnxtek View Post
    Click image for larger version. 

Name:	image.jpeg 
Views:	79 
Size:	174.1 KB 
ID:	39647
    Also rotate that front clamp on the muff to prevent it from hitting the lower cowl support channel. It could tap the channel making you think that there is something seriously wrong with the engine.
    N1PA

  25. #65

    Join Date
    Oct 2012
    Posts
    4,539
    Post Thanks / Like

    L-21 Javron

    Mike made a form out of 2x lumber to press soft 032 into rounded-end scoops. I can send pics if you're interested.

    The project looks great. Thanks for sharing.Click image for larger version. 

Name:	fvXGKHq-0%21sizeoriginal.jpg 
Views:	87 
Size:	498.2 KB 
ID:	39651
    Last edited by stewartb; 11-05-2018 at 09:02 AM.

  26. #66

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    I'll probably do a combination of lower bottom cowl and cowl scoops.
    That's the value of poster board lot's of trial and error to go
    Thanks for the ideas

    pictures are very deceiving lots of space between the lower support and the clamp
    When I get to final assembly everything will be positioned for max. clearance for sure




    Quote Originally Posted by skywagon8a View Post
    Also rotate that front clamp on the muff to prevent it from hitting the lower cowl support channel. It could tap the channel making you think that there is something seriously wrong with the engine.

  27. #67

    Join Date
    Oct 2012
    Posts
    4,539
    Post Thanks / Like
    How do you lower the bottom cowl without changing the nose bowl?

  28. #68
    RaisedByWolves's Avatar
    Join Date
    Feb 2005
    Posts
    3,770
    Post Thanks / Like
    Quote Originally Posted by stewartb View Post
    How do you lower the bottom cowl without changing the nose bowl?
    When I made my lower cowl I used mikes advice, and when it’s flat, extend the distance between cowl attachment holes if that makes sense. Drops the air filter scoop down. Most stock cubs the cowl is touching the air box, on round filter cubs


    Sent from my iPhone using Tapatalk
    Likes mike mcs repair liked this post

  29. #69

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    Quote Originally Posted by RaisedByWolves View Post
    When I made my lower cowl I used mikes advice, and when it’s flat, extend the distance between cowl attachment holes if that makes sense. Drops the air filter scoop down. Most stock cubs the cowl is touching the air box, on round filter cubs


    Sent from my iPhone using Tapatalk
    So you mean a little more distance between mounting to the lower support rail on the aft end only, giving a bit more bow to the lower cowl?
    you can't change the front or it won't fit the nose bowl
    My engine is 2" lower than stock and has thrustline built in so the air box is a couple inches below the lower cowl at least the way I have it now
    with my poster board mock up
    Likes skywagon8a, mike mcs repair liked this post

  30. #70

    Join Date
    Oct 2012
    Posts
    4,539
    Post Thanks / Like
    Exactly. My nose bowl is lower below the prop opening than most. That provided clearance for my Vetterman mufflers. The dual scoops in my picture went unused so they morphed into a full width cooling lip instead. My muffler clearance is close to the cowl but so far so good. The only nuisance is reaching the quick drain in between two hot mufflers to drain oil. I can live with that. Scoops should work fine.

    What suspension will you use? Beware. Your exhaust will dump right onto your TKs or ACMEs. It's a recurring maintenance issue to remove exhaust residue.

  31. #71

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    I have TK's so that issue has been on my mind Any one make covers for them?


    Quote Originally Posted by stewartb View Post
    Exactly. My nose bowl is lower below the prop opening than most. That provided clearance for my Vetterman mufflers. The dual scoops in my picture went unused so they morphed into a full width cooling lip instead. My muffler clearance is close to the cowl but so far so good. The only nuisance is reaching the quick drain in between two hot mufflers to drain oil. I can live with that. Scoops should work fine.

    What suspension will you use? Beware. Your exhaust will dump right onto your TKs or ACMEs. It's a recurring maintenance issue to remove exhaust residue.

  32. #72
    RaisedByWolves's Avatar
    Join Date
    Feb 2005
    Posts
    3,770
    Post Thanks / Like
    http://www.supercub.org/forum/showth...-amp-PDF-Files


    Sent from my iPhone using Tapatalk

  33. #73

    Join Date
    Jan 2007
    Posts
    1,655
    Post Thanks / Like
    Consider moving the lower cowl vents forward another inch or so. You want some room behind them in case you need to add seaplane lip to add cooling.
    DENNY

  34. #74
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    [QUOTE=avnxtek;730947]So you mean a little more distance between mounting to the lower support rail on the aft end only, giving a bit more bow to the lower cowl?
    /QUOTE]

    Click image for larger version. 

Name:	IMG_1492.JPG 
Views:	109 
Size:	90.6 KB 
ID:	39652



    Sent from my iPhone using SuperCub.Org mobile app

  35. #75

    Join Date
    Oct 2012
    Posts
    4,539
    Post Thanks / Like
    Lowered engine mount. The "rules" have changed.
    Likes mike mcs repair liked this post

  36. #76

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    I'll give that a try with my mock-up and see where things end up

    All great information Thanks.

    [QUOTE=mike mcs repair;730957]
    Quote Originally Posted by avnxtek View Post
    So you mean a little more distance between mounting to the lower support rail on the aft end only, giving a bit more bow to the lower cowl?
    /QUOTE]

    Click image for larger version. 

Name:	IMG_1492.JPG 
Views:	109 
Size:	90.6 KB 
ID:	39652



    Sent from my iPhone using SuperCub.Org mobile app

  37. #77
    Bearhawk Builder's Avatar
    Join Date
    Aug 2012
    Location
    In the woods
    Posts
    639
    Post Thanks / Like
    I did the same, that little bit makes a big difference in clearance.

    Quote Originally Posted by RaisedByWolves View Post
    When I made my lower cowl I used mikes advice, and when it’s flat, extend the distance between cowl attachment holes if that makes sense. Drops the air filter scoop down. Most stock cubs the cowl is touching the air box, on round filter cubs


    Sent from my iPhone using Tapatalk

  38. #78

    Join Date
    Apr 2008
    Location
    Michigan
    Posts
    79
    Post Thanks / Like
    It looks good with paper.
    I think I'll go for it with aluminum

    Click image for larger version. 

Name:	image.jpeg 
Views:	50 
Size:	168.7 KB 
ID:	39653

    Click image for larger version. 

Name:	image.jpeg 
Views:	42 
Size:	94.4 KB 
ID:	39655

    Click image for larger version. 

Name:	image.jpeg 
Views:	43 
Size:	218.6 KB 
ID:	39656Click image for larger version. 

Name:	image.jpeg 
Views:	121 
Size:	202.4 KB 
ID:	39657
    Last edited by avnxtek; 11-05-2018 at 11:14 PM.

  39. #79
    www.SkupTech.com mike mcs repair's Avatar
    Join Date
    Aug 2004
    Location
    chugiak AK
    Posts
    10,322
    Post Thanks / Like
    I'd leave out the bottom scoops at first... run it & see if they are needed... wildcatcub turned out ok without them, just a lip in back..(we had them all made)

  40. #80

    Join Date
    Oct 2012
    Posts
    4,539
    Post Thanks / Like

    L-21 Javron

    Using the stock nose bowl the slope on the top cowl will increase and the bottom cowl flattens out. Cutting a relief and shielding that with a scoop may be necessary. Or add domes for clearance and skip the scoops. Or morph domes into scoops. Maximize cooling. Experiment. Improve. Bottom line? Do whatever you want. This is the fun part!
    Last edited by stewartb; 11-06-2018 at 07:17 AM.

Similar Threads

  1. Building a Javron Cub
    By Bill Rusk in forum Member Projects in Progress
    Replies: 2200
    Last Post: 07-02-2019, 10:04 AM
  2. New Javron Build
    By flyanozira in forum Cafe Supercub
    Replies: 7
    Last Post: 11-06-2015, 09:08 AM
  3. Jasperfield's Javron
    By Jasperfield in forum Member Projects in Progress
    Replies: 44
    Last Post: 06-18-2015, 03:49 PM
  4. Ron Building Javron Cub 1
    By ron cope in forum Member Projects in Progress
    Replies: 18
    Last Post: 05-25-2015, 05:31 AM
  5. Who is building a Javron Cub?
    By Jasperfield in forum Experimental Cubs
    Replies: 18
    Last Post: 12-18-2014, 10:43 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
  •