Also, I commented onetime before about being careful to not create stress risers when sanding the center spar element. Sanding should be linear with the direction of the extrusion and not across the extrusion. In my mind the fit of the spar elements should be better addressed by the factory, those parts should be factory pre-fit.

I hope you are not using your so called managery for final alignment of the angle of incidence. Your setup is too short coupled. I suggest you use angle type aluminum extrusion or other perfectly straight elements x2 full chord width and use actual math calculations to determine the angle or a highly precision angle measuring device besides a cheap carpenters square with a bubble level. Furthermore it appears that your leading edge location as neutral position for the mean chord line is not in proper position(could be camera angle). Somewhere in your past vides I think I saw where you have 3d printing technology, if you have CAD skills then you could plot the airfoil in CAD and 3D print a piece to locate said leading edge position. I've been following your build for along time now and I appreciate all the detail you put into your videos. Thanks!

Awesome! Any way to have a 1 piece windshield? The center bar bothers me.

Only a handful of bolts holding the center section spar .Why not remove it and remove excess material in a lathe .Or make a simple tool to spin the center section and sand it that way.

Your going to ruin the center spar with ultra coarse sandpaper. Can anyone say stress risers?

I really felt for you on this one..........

My spars were .030 to .050 out of round . I had to have then straightened before i started the wings.

This is cool to watch, I would however caution skipping the grease on the spar not because you need the lubrication but because the grease would have a corrosion protection value. I would think about using an LPS-3 corrosion inhibiting grease there for that purpose.

Correction i flew the plane till 1994

I Built a B D 4 back in 1973 and flew it until 2024 . I bought the wing spars from a builder that gave up his project and sold the parts. I made form blocks and hydroformed aluminum ribs and made a metal wing back when they were using fiberglass panel ribs. The wing worked so well that i ended up selling kits for the metal wing.

Like your Videos

Are you sure you can build the whole other wing, run all the wiring and tubing, seal it, sand it and prime it ON the plane, up high? Would it not be easier to finish it on a jig, at an accessible height, and then recruiting a few friends or neighbours one Sunday afternoon (perhaps with a promise of some pizza/burgers and beer), to help lift it in place and slide it onto the centre spar? We don't have much online info from others' experiences, but if Art's blog is any indication, sliding it onto the spar went quite well once he got the crew ready to help. To be fair, Art finished his wings first, with the help of Bede's workshop assistance. What I'm thinking is, building a wing takes quite many days; sliding it onto the plane, once you get enough people to help, just a few hours. By the way, before starting to build the wing, have you tried sliding the wing spar onto the centre spar first? Just to check how tight the fit may be. Art spent a lot of time honing the inside of the wing spar in order to make it fit, since neither spar was perfectly circular (both were slightly oval, and of course, the angle of the oval didn't match). Here's his blog post about it: cheerfulcurmudgeon.com/2013/12/08/wings-fit/

Looking forward in excitement

I like the quality of your work

Did you seal the L-brackets on the rear false spar?

Great work…working on my bd now…thank you. Need to do new wings…

Use a hair dryer to heat the glue on the plastic

Bottom of fuel cell ribs to allow fuel to transfer to the sump..I couldn't see any

Silly question. But were there notches on botto.

I used to work in a sign shop and had to peel tons of plastic. Roll it, don’t peel by pulling.

I know I’m being a bit selfish! But I was going through withdrawals waiting for video number 30 PS great job much appreciated

Where i can get this app?

With the news that the BD-4C is being sold to a company that sounds like it has no interest with kits, will this affect anything?

Amazing work…I love the thought on the alternate to the nut plate…I should be picking up a bd4 this month, I plan to use your landing light mode. It’s perfect.

You are great…!! If I were you…example…the wing light…I would make with nut plates or equivalent, or a way it comes out as an assembly…I.E. you said 50k hours, (I just replaced one, initial installation 2016)…or damaged or, or, or…from a A&P point of view it would make it easier. Hahahahaha. Just saying, you do a lot of analysis & amazingness!!! Really cool..thank you for putting this out!

I’m looking to buy a Bede-4; do you have a owners/builders group I can talk to about an inspection? Thanks, Gene

Could you do a good detail on the frame where the tail inserts and attaches? I have a new vertical tail, and the builds vary...

I can’t wait to see a finished plane! This is an amazing series! Thank you so much for spending the time to film, edit, and post.

So did you take down the app? I really like it but it's not on the Google Play store? Anyways to get the app?

What kind of glue you used for wing ribs and tube?

Lexan better than plexiglass, it is stronger and more Cristal clear.

Please please, one day have someone make a whole series of your video-documented work. Your videos are gem for those that understand what a Bede 4C is. I am so proud of you!!!

You're an idiot.

You are going to love that plane, my friend had one we had great fun/memory with it. Are you building the short wing version? What engine are you putting in? Cheers, a.

methelene chloride will dissolve that foam in seconds

You are making great progress with the plane and your video skills are improving.

Cool to see the wing ribs going on the spar tube. Keep on trucking!

Ive been trying to get this to work on my raspberry pi for a while now and I am having all sorts of problems. This could be because of my lack of knowledge with the project. I was wondering if you could provide an instructional video of how to install this. I have a raspberry pi 4 with stratus already on it and would like to use that.

What was the final skeptical issue with decision to forego the Viking?

Hi.. firts , realy like your style of vidio, and your content. My question if I may? WHy bolt everything together, and not rivert? hope to hear from you. Kevin H

Just been catching up on your build , would be interested to know why you havent gone with the Viking engine and stayed with the UL , my feeling with that is the UL being a dedicated Aircraft engine the repair and parts availability would be expensive and how easy are parts to get ,Viking Being Honda parts are about every where, also Aeromomentum being suzuki outboard based have a 200hp ( I think ) those two being geared would have better prop efficency .other than that it looks like your doing a bang up job of the build

Do you happen to have the measurement that would be needed to allow the seats to recline further? Unless you may have found a way to mount them differently? I plan to put seats like these as well. I'm 6' so hoping these will work for me.

The primer you are rolling on is Eastwood..? What is the putty you used to fill the slight imperfections in the stabilator skin? Thanks

Hey Sky Fun your videos are helping me Build an old original kit I just got. Thanks for the help and motivation!

I can’t wait to see this thing completed! I have a question and a comment about the seats though. I believe you would be well served to limit the travel of your seat tracks. You wouldn’t want to get in the air and find out your passenger moved the seat forward enough to limit the movement of the stick. My question is, do you think the width of the upper part of the seats will interfere with visibility, or the closing of the doors?

Inch by inch.... it's getting closer. Ready to see that UL power plant mounted up!

Nice to see sir keep going

neat work

What is the size of the aluminum angle for the aft fuselage section? Looks like 1-1/2"X1-1/2"X1/8"

Great to see you're still moving on. I think your plan to change the stick angles will work out good for now, but I wouldn't be surprised if you don't find yourself redoing them again once you've flown it a few times to see where your sticks are 'neutral' for flat stable flight. Thinking you might have to build some custom bent sticks as you've now changed the neutral positions/angles, but only time will tell once it's in the air. Good work and don't get too hot; this summer has been brutal. Can't wait to see how she flies with that UL engine!