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Thread: Javron Cub Complete

  1. #1
    Mauleguy's Avatar
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    Javron Cub Complete

    Well I built another Javron Cub. I started it in November 2019 and finished it in July 2020. Click image for larger version. 

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    First flight was off my 350 foot airstrip.

    So here are the list of equipment that make up GM Cub: 1080 empty weight
    Javron narrow body kit which includes Javron round tip wings, stock flaps, stock ailerons.
    3' extended gear
    35" Alaskan Bushwheels
    Borer prop pitched to 41
    0-320 engine with 10-1 pistons and dual slick impulse mags
    No starter
    Earth X battery ETX-680
    B&C 8 amp alternator
    Trig com and Trig Transponder with ADSB out
    Full electrical panel with breakers and switches (old school)
    Super Flight primer and paint
    Baby Bushwheel
    Extended upper and lower baggage
    Fine Line Seat cushions
    Acme Gen 4 Shocks
    Front and rear controls
    .032 metal floor boards (powder coated)
    .020 metal interior panels (powder coated)
    Carbon concepts underseat storage and control fairings

    I have around 30 hours in it now and it is a real hot rod, light on the controls and quick on the throttle. Puts a smile on my face and it is what I am flying since I am doing a full engine
    overhaul on Bushwacker 2.0 right now.
    Thanks FdxLou, supercrow thanked for this post

  2. #2
    Olibuilt's Avatar
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    That is a nice looking aircraft and specs! Please show us some videos of you flying your dream aircraft.

  3. #3
    Bill Rusk's Avatar
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    Awesome weight on 35’s. Man I wish I could build that fast. Great job, Greg. DW speaks highly of it and you. Dive trip in Feb? Perhaps this spring or summer, before the floats go on, I can come out and fly with you guys.

    Bill
    Very Blessed.

  4. #4
    Mauleguy's Avatar
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    Yes you should come out and play or if not we head your way, Idaho right...

  5. #5
    Bill Rusk's Avatar
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    Yep, northern part, (Sandpoint) but we can meet at JC and hit the playground.

    Bill
    Very Blessed.

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    Another good looking airplane Greg. Congrats. Out of curiosity, why did you go with stock flaps on this build rather than P-Stol?

    I would love to see interior pics as well if you have time.

    Joe

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    Olibuilt's Avatar
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    What are the main differences with the white and red Cub and how do you compare both?






    Thanks for sharing

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    Sounds like quite a plane! I'm also curious as to why you went with a stock wing...?

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    courierguy's Avatar
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    Nobody commenting on the TEST FLIGHT off his 350' strip?! Having a 400' mountain strip myself, I now feel like a slacker, as I've always wimped out and and taken a new bird down into the valley to test fly. No starter, that is hard core! I like that simple paint scheme, and the time line on building it.
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    Quote Originally Posted by courierguy View Post
    Nobody commenting on the TEST FLIGHT off his 350' strip?! Having a 400' mountain strip myself, I now feel like a slacker, as I've always wimped out and and taken a new bird down into the valley to test fly. No starter, that is hard core! I like that simple paint scheme, and the time line on building it.
    Right on....Test flying a new build for the first time is nerve wracking enough...lol
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    All about bank account and ball size!

  12. #12
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    Yup. Trust your own work or don't get in it.

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    Finished and flying in ONLY ONE YEAR!!!

    Congratulations! You are an inspiration to us all.

    Good job.

  14. #14
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    White and Red cub is Doug Kellers, Stock PA-18, great airplane.

    The flying from my home strip was a calculated risk I guess. I know the strip and for a cub it is an easy take off. I wanted to assemble at home where I have all my tools, just makes life easier. I figured the other two places I might use to do it were both just as unforgiving once I broke ground so what the heck. I did trust my work and I did a short runup and taxi test and it felt ready, honestly as soon as I put the power to it I knew it was all good.

    The time frame works because I have done so many now and I have lots of great tools, it's a good kit to work with also.

    I will take some more pictures and post.

    PSTOL flaps are nice and I would probably have them if they were not so far out on the orders. I wanted to see how much difference they made and so I flew Doug's cub back to back with my cub a month back, it is a few mph light. Loaded it may make a bigger difference. Still might order them just having a ball with it the way it is.
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    A guide I used to know flew a stock 18, and flew it very well. Every time he’d see a Cub with any wing mods he’d shake his head and mutter something about “Batman wings”...
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  16. #16
    mvivion's Avatar
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    Man, I don't care if you've built fifty of them, that's still an amazing job to get done that quick. And, looks like a really GOOD job at that.

    MTV

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    Click image for larger version. 

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    Well I do become a little obsessed when I have a project. I usually work on it everyday, sometimes all day.
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  18. #18
    Dave Calkins's Avatar
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    Wink

    3 foot extended gear. Awesome!
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    G44's Avatar
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    Wow, just WOW! Very nice Greg, I’m super impressed all the way around. Thanks for sharing. I would love to hear your thought process on things on this airplane and why you did it the way you did it.

    Kurt

  20. #20
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    I have built 3 experimental cubs now.

    1st one was yellow Got Rocks (not a kit), O-360 Lycoming with 10-1 pistons (Bart engine), 90"pitched 33 propeller, no covering on the tail but a custom baggage area where turtle deck use to be, 3" extended gear on 35" ABW, 13 rib stock wing with stock flaps and ailerons, stock angle of incidence, stock tail feathers, baby bushwheels, no starter or electrical system for that matter, micro VG's, built in thrustline engine mount lowered the engine for stock visibility, 36 gallons of fuel, oregon aero front seat, composite floor boards not much for interior panels, no "D" windows, titanium firewall no blanket and a 4" long custom boot cowl. Weighed 1053. It really got off the ground quick but was pretty nose heavy. Since then it has gone through a complete transformation by the new owner. Lots and lots of mods.

    2nd one was silver cub (Javron wide body with Univar wing parts) GM Cub, O-360 Lycoming with 10-1 pistons that I overhauled, 1P23584/44 propeller, oratex covering, raised the angle of incidence 1/2", extended the wings and squared them off, custom double slotted flaps 108", custom ailerons 89" dakota wing tips 36 gallons of fuel, full electrical but similar panel to the new cub, oregon aero interior seats (front and back), metal interior panels full interior, composite floor boards, full boot cowl, stainless steel firewall with blanket. Weighed 1194, it flew a lot slower (at least 6 mph) but was not as much fun to fly(more truck like), it performed very good though and was a much better adventure airplane then Got Rocks. It also had a starter because after Got Rocks I decided I would not do the no starter thing again....

    3rd one yellow/black cub (Javron narrow body) see specs above. I decided to do the no starter thing again and I think it is easier with an O-320 Lycoming. I also wanted a cub with less weight on the nose this time. I guess maybe I have come full circle. I would like to fly slower for sure but not sure I want to give up the sportiness of a stock wing. Double slotted flaps would get me 2-3 mph.

    That's about it for my thinking.
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  21. #21
    G44's Avatar
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    Thanks Greg!

    Kurt

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    Greg, you mention having certain tools helps speed up your builds... What are some of the tools that you wouldn't want to go without?

  23. #23

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    Greg,

    are those Airframes Aluminum struts? Bare alum?....Thinking of getting some for my 11
    Thanks barrow pilot thanked for this post

  24. #24
    Mauleguy's Avatar
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    I have a full machine shop, cnc lathes, cnc mills, manual mill and lathe, vertical and horizontal bandsaw, shear and brake, bead blast cabinet, pretty much every air tool, pretty much every hand tool. If I don't have it I buy it when I need it. Hardware for assembly. I order stuff ahead of when I will need it so I am not waiting on things.

    PSTOL flaps I did not order ahead of time even though i knew their lead time was getting bigger. I was and I am still not sure I will keep the cub. I only need one airplane and Bushwacker will probably be the one.
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  25. #25
    Mauleguy's Avatar
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    Yes, they were before Airframe bought the rights from Doug Keller. Doug was kind enough to share strut material and prints

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    Quote Originally Posted by 1934A View Post
    Greg, you mention having certain tools helps speed up your builds... What are some of the tools that you wouldn't want to go without?
    sorry ryan just throwing in a little humor.
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    Quote Originally Posted by tempdoug View Post
    sorry ryan just throwing in a little humor.

    Haha, I was just trying to prove to my wife that the reason there's still an airplane project in our garage is because I just don't have enough tools to finish it!
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  28. #28
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    Quote Originally Posted by 1934A View Post
    Greg, you mention having certain tools helps speed up your builds... What are some of the tools that you wouldn't want to go without?
    I liked his answer, "ALL OF THEM!"
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  29. #29
    Mauleguy's Avatar
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    I post some video of the new cub if you want to see it.
    Thanks G44, Paul Heinrich thanked for this post
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  30. #30
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    Greg, I really like your videos and the way you narrated them. Very informative! Question for you, why is Bushwacker all black and your Cub wings black? Just like the color? Melt frost? Some other reason? Just curious on that.

    Kurt

    PS, both are incredible airplanes!
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  31. #31
    DJ's Avatar
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    Inspiring!

    Sent from my SM-G965U1 using SuperCub.Org mobile app
    The heavens declare the glory of God; the skies proclaim the work of His hands. Psalms 19:1
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  32. #32

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    Impressive performance and piloting skills!!! Thanks for sharing!

  33. #33
    Olibuilt's Avatar
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    Those are big holes!! Great way to test the suspension. Must be gentle on the brakes.


    Is there any reason why you have not installed slats on your Experimentals Super Cub built?



    Thanks for sharing

  34. #34
    Mauleguy's Avatar
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    Quote Originally Posted by Olibuilt View Post
    Is there any reason why you have not installed slats on your Experimentals Super Cub built?



    Thanks for sharing
    Yes, I have stated I think before but maybe not here that for me slats don't make sense for my kind of flying. I want to see where I am going and what I need to miss and with high angles of attacK (which is where the slats work) they are not going to do me much good for landing.
    I believe for me to slow down and still seeing where I am going it is either bigger flaps or flaps that work better i.e. Double Slotted flaps. I think slats do add a great margin of safety in the on the edge slow flight stuff but I feel I am past that danger point in my life now. I do also use VG's for the added flight benefits they offer and almost zero weight penalty. I don't like to hit my tail first for a lot of reasons and that is all you can do with slats if they are working. I think slats do offer a good benefit in slowing down to get a better look at a spot that is a potential landing spot and the slower you can fly the better the look you can get but I don't want the weight penalty for the occasional use for that. If you like them by all means do not take them off, I am old school in a lot of ways.

    Greg

  35. #35
    mvivion's Avatar
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    Quote Originally Posted by Mauleguy View Post
    I post some video of the new cub if you want to see it.
    REALLY nice demo video, Greg! That is some very impressive performance, particularly with a stock wing. Light is right, obviously.

    MTV
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  36. #36
    Cub junkie's Avatar
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    Nice paint choice. Doesn't look like a bag of Skittles was dumped in the paint mixer.
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  37. #37
    Mauleguy's Avatar
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    simple is easier to repair which is what the Skittle guys have yet to figure out
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  38. #38

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    Greg, can you expand a little on lightening the 35” wheel set? Drilled rotors, light nuts, thin washers......? Neat cub. Thanks!

  39. #39
    RVBottomly's Avatar
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    Quote Originally Posted by DJ View Post
    Inspiring!

    Sent from my SM-G965U1 using SuperCub.Org mobile app
    I agree completely.

    Greg, I had been wrestling with various directions to go on my build. Your video reminded me of my original direction. I really appreciate what you've done and how you've done it!
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  40. #40
    Mauleguy's Avatar
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    Quote Originally Posted by KevinJ View Post
    Greg, can you expand a little on lightening the 35” wheel set? Drilled rotors, light nuts, thin washers......? Neat cub. Thanks!
    So I machined every thing down to .090-.100 thick on the wheel halves, I drilled the brake rotors (The thin rotors that work with the 3 rivet brake calipers). I used the double puck brake calipers that use the 3 rivet pads and used my own brake pads that I have machined for others in the past (I don't make pads for the public anymore). I did not do any machining to the caliper housing, there just was not enough extra material for that to make sense. Thin washers but just regular nuts. Probably could save some more with titanium bolts and nuts
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