L-21 Javron

[avnxtek]

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

[flylowslow]

Let the fun begin!

[Lowrider]

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!!

[stewartb]

Let the work begin and the money flow! Fun stuff. Enjoy.

[avnxtek]

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

[CuBob]

We're in Michigan are you located?

[avnxtek]

We're in Michigan are you located?

C04. Oceana County

[chinook]

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

[skywagon8a]

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?

[CuBob]

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

[avnxtek]

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

[avnxtek]

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

[chinook]

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

[WanaBNACub]

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!

[avnxtek]

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






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

[skywagon8a]

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.

[avnxtek]

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

Floorboards going in. Love that carbon fiber


A few other parts and pieces installed


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


Firewall and boot cowl. Quality stuff




Way two much fun


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



Thats it for now. Off to have more fun

[Bill Rusk]

Looks great. Thank you for posting. It is fun and interesting to see it come together.

Bill

[Steve Pierce]

Way two much fun

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.

[Mspindler]

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

[flylowslow]

Picking up my fuselage from Javron tomorrow! Like Bill says, I feel blessed! Can't wait to start going up!

[avnxtek]

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

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

[avnxtek]

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


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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[Bill Rusk]

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

[Steve Pierce]

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.

[avnxtek]

Copy that
And thanks for the quick response

I may add a couple tie points also


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[flylowslow]

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

Thanks,
Denny

[avnxtek]

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

[avnxtek]

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?




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[skywagon8a]

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.

[Steve Pierce]

I agree, center over the rib itself.

[avnxtek]

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

[avnxtek]

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











Upper baggage compartment and rear bulkhead





Fuselage cover up next
Fun Fun

[Lowrider]

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!!

[avnxtek]

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



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



Bottom skin going on






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



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

[Steve Pierce]

Here is a link with the Piper drawing.
http://www.supercub.org/forum/showth...cover-grommets

[mike mcs repair]

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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[Steve Pierce]

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.

[Steve Pierce]

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.

[avnxtek]

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?