BUILDING MY NEW AIRPLANE. (The Fuselage)

I am building a light-sport aircraft from scratch. I finished welding the fuselage from 4130 Chromoly tubing in this video. I talk about the landing gear that I will be designing and making for Defiance.
So far everything is coming together.
I am using 4130 .035 Chromoly tubing from www.wicksaircraft.com/
Wicks is a great place for all your aircraft parts! Mention JONAS10 for 10% off your order.
Custom Landing gear! John Roberts
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[@GeekOfAllness]

You could have just talked to her then called *us* back later. It wouldn't have hurt my feelings.

[@thercproject9309]

GeekOfAllness he know we don’t mind seeing her :)

[@nejdro1]

I would give her priority anytime over a bunch of old farts watching these videos! :)

[@matthewcraigtaylor]

@@nejdro1 Oi - I'm a medium aged fart ;-)

[@paulbrach5778]

GeekOfAllness I think he has much to learn about women! 😂😂

[@arandomuser6665]

bros before ...

[@erik6690]

Yes! Love it! I’m an aero engineer and I fully support you and Wilson. Don’t let the haters (I predict there will be about 1,000,000) tell you that you don’t know what you’re doing. They’re just jealous that they don’t have the balls (volleyballs) to try something epic themselves. Super stoked to have another build series to follow.

[@erik6690]

Just read some comments and I was wrong about your fan base. They’re a lot nicer! I thought it would be like the comments under the raptor build series.

[@MrAHatz]

Well, your comment here makes me feel a little better. As a fellow engineer (not aero, though), looking at some of the bracing design made me feel a little nervous (that first section in the triangular tail for example). But if someone with experience in this field isn't too worried, I guess I needn't either. I've always wanted to to do a plane build, but quite honestly don't have the balls to do it, as you said.

[@erik6690]

Andreas Hatz I didn’t say I wasn’t worried. I haven’t the faintest idea if it will flutter and kill him. It’d take a whole team of multi disciplined experts to really gain the highest possible level of confidence in any new aero design. I’m just proud of the people who obviously don’t have access to that and take the risk so we can all copy them after if it works. May those with the balls pave the way!

[@MrAHatz]

@@erik6690 - I guess he could at least check the torsional stiffness by applying a known sideways force to to top of the tail and measure the displacement. That lone unsupported horizontal bar in the base of the tail gives me the heeby jeebies.

[@JonasMarcinko]

@@MrAHatz Some tubes were not yet welded in do to other strut attach points and so on. but I have talked with a few aero designers that reached out and I have been cutting and changing a few things! So hopefully, we can all feel a little better about things!

[@malalalalalala]

Jonas: "I'm just kidding guys" Me: "Thank god" Jonas: "That was all Wilsons idea" Me: "oh no"

[@Fantaloon]

As sad as it will be to see the Kitfox go, I cannot wait to see this project unfold!

[@scottfitzgerald5423]

Oh Wilson... you crack me up dude! Nice work on the project and video!

[@JonasMarcinko]

Scott Fitzgerald haha thanks Scott!

[@equaltothetaskaviation6440]

Hi from Australia, nice work mate keep it up.

[@saltzen961]

Full marks for whoever invented it , because this "Stol" drag thing, seems to be exciting a lot of interest , and subsequently a LOT of COOL innovation . General aviation , pretty much static for generations , is evolving more rapidly now ,than at any time since the early days of flight itself .

[@niceguy2171]

Had those moments when I may have been out in the shop too long as well, but my buddy is Spalding as Wilson is already taken by Tom Hanks..and now you, ya gotta watch him though, he started hiding tools on me towards the end, and I'm pretty sure he was into the liquor cabinet often as well ;) Good to see you back on the project, now get 'er done!

[@fatherof4kids]

I use to fly Cessna 152's and 172's with friends and family and they used to let me fly. I have about 12 hours of recorded flying with instructors. I never actually got my solo license and I regret it. Your videos make me miss being up in the air. I like your videos.

[@ZachTate]

Sweet camera work!

[@JonasMarcinko]

Thank you!

[@justinhelstien]

Loved the video Jonas!!! Hilarious with Wilson and the video effects awesome!! Great work, love the enthusiasm and excitement for your project!! Get after it!

[@flyboy196]

I love the design of the whole thing, especially the landing gear!

[@BricoleurTV]

Keep it up Jonas! Great seeing someone fulfilling his dream without the help of a hired camera-guy and tons of money...

[@wallyfirkins1664]

Great stuff Jonas. Can't wait for the next installment.

[@GyrocopterGirl]

Impressed you have the patient to build your new SPEEDY STOL DEFIANCE. Greetings to your love :-).

[@johnturkovich6768]

Living the dream!!! Jealous and excited for you! I have always wanted to design, well finish my design and build it! Super stoked for you man!

[@larrycampbell9202]

Jonas, is there anything you can't do? You're amazing and so is your girl. She's a keeper.

[@simplyred6780]

Hey Jonah glad to see you starting on your dream it's been a day day and a half since you first showed us The Jig the ball is definitely rolling great content it will definitely be exciting to watch that step by step build thanks for sharing

[@MartyG144]

I'm so excited for this build. Your videos are the best!

[@prof.heinous191]

Nice work bro! Hopefully Prof. Patey gets to see this and sends you a little feedback!

[@boardbysled]

Excited to see the build progress. I am building a tube chassis rockcrawler currently, and a plane is the next project on the list!

[@dmorgan28]

Enjoying watching you build your new plane. It’s gonna be a nice one. Have a good one. 👍👍👍❤️

[@DCGULL01]

Jonas- Good on Ya, Brah! Nice to see that you have more skills than just totaling aircraft. Love the fact that you design/built it, Scha-weet!!! Love the alternative ideas for load bearing, and- hope that the aero tricks incorporated work! Like the simple gear thoughts, and, drag reducing ideas. Bet it's gonna be fast!!!

[@JKJ360]

Please let us know before your next builds, I'm sure the community would get you some quality grinders instead of the harbor freight drill master... I may just send you a couple of ours to get you started. Great video and look forward to much more from this build!

[@JonasMarcinko]

I know. I do need some nicer tools... Thanks for the offer!

[@garylee7085]

I am burning up a lot of valuable time watching all you guys live my dreams, good luck, be safe and keep up the good work

[@deividasJo]

Jonas: I'm not going to film close-ups and slow-mos cuz it takes a lot of time. Also Jonas at 4:20 Lol. Nice work!!

[@JonasMarcinko]

haha I couldn't resist!

[@patalexander1965]

Really enjoying this Jonas! Be watching you 100 percent building this plane! Careful as she goes!

[@wynnfpv]

Epic! Please making these man! I want to see more building!

[@christopherolson7833]

The build videos are cool! Can't wait to see it done.

[@russellfreeman4931]

keep the build videos coming! We will surely love this journey just as much as any flying adventure!

[@JonasMarcinko]

Thank you for your feedback!

[@johnfriesen7276]

Can’t wait to see the finished product, great job keep it up looking forward for the next vid

[@petrokemikal]

Yesss !!! Get after it ... This is gunna be awesome !!!!

[@Georgewrigley]

Awesome 😎 Looking great and look forward to the journey ✈️😊👍

[@TheMarcball]

Cool details. Thanks for the inspiration and keep on trucking (from France)!

[@lindsaylefaivre537]

Sounds great ! I used the gear idea for my Bush plane from the piper tripacer, the bungie's and the Rebound shock are all tucked up inside :)

[@PaulTronier]

that's super cool cant wait to see it with some skin!!!

[@bryan.meijer]

Looks cool, can't wait till it's done. Nice filming📷😁 And I like the name.

[@donwtsn]

Love your work mate. There is something about designing your own thing the way you want, by using what you like about other aircraft’s designs. My Frankenstein is built the same way. Cool stuff!

[@factorypilot99]

been waiting on this video haha looking great i'm sure the gear and the fuselage bracing up front will do good

[@gerritdykgraaf2570]

Sweet Vlog Jonas!! Nice seeing you continuing the work on your dream bird!! There will be trials and errors!! Keep your wits about you bud!! You have the internal drive!! The beard really works for you!! Quite awesome actually!! Getter done son!! The day you get to sit in it and turn that key and bring her to life. Well,,, it will be because of you!! She will be truly a part of you in the air!! I will Be following you along the way!! Giving support as you progress!! For now you get a 👍👍👍 up!! As always Jonas! Fly Low,,, Fly Safe,,, G -Man

[@hgj2019]

I’m sure you know Champ, Citabria, Decathlon, Scout aircraft. They all use three longerons in the empennage. Been doing it around 80 years. I see some other Citabria influence on the cabin braces with the “y” on each side in front. Fuselage looks like it should be really strong, but light. Good work!

[@siiilvija1]

love it!

[@ruben0227]

Yes!!!!! Thank you for the video!!

[@thomascarmichael6760]

This is gonna be interesting. It’s always fun to see an aircraft come to life. It is definitely a learning process. Can’t wait to see the process in action.

[@garyn4318]

I enjoyed this video, love watching builds 👍

[@rsbrehm]

This is the first video I've seen on building an experimental! nice! (As long as it is safe.)

[@bicyclelab736]

Rad! Can’t wait to see the next video!

[@edbuyers]

Good one. I loved Wilson.

[@ryanamendala6524]

Video was fantastic Jonas. For so many reasons. Call yourself a rebel, then put a Murphy Rebel crash clip in your video (which has design ties to the Beaver) and of course Wilson! Btw the rebel does not have the cross bracing because it's semi-monocoque design and has a square cage in the cockpit area made from aluminum square tubing that the firewall ties into. Rebel is a legit backcountry airplane as well. That was a harsh attempt at landing. Keep 'em coming. Great work and good luck with the build

[@mikeallensonntag]

Can't wait to see the build process.

[@G_Money72]

Great progress! Another amazing designer used the defiant name.

[@MrWATCHthisWAY]

Yea baby, Defiance great name because if you named it- I really put a lot of thinking in to this plane! Would be way to long of a name. Even if this is how it evolved!!! Love it.

[@JonasMarcinko]

lol right!

[@MikePatey]

Great video bud 👍🤠

[@JonasMarcinko]

Thanks Mike!! 🙌🏻 Your videos are huge help!

back to work 💪

[@3th1xs]

@@JonasMarcinko You guys are both great inspiration. What diameter is that 4130 .035 wall tubing? And how much did you use for total linear feet to assemble the frame? I am trying to get started on pricing an amateur built plane.

[@samroesch]

Love the build videos keep it up!

[@rochboulanger6565]

My dad’s 1994 Skidoo skandic II actually had that exact suspension setup you talked about in front end. It was an oddball for a snowmobile but worked quite well actually.

[@johnlichtenstein6158]

He hasn’t said yet, but I think that’s what mike is going to with the gear too. It’s my favorite gear concept too. It rattled around in my head for a while till I saw it in a museum. Cool stuff dude.

[@JonGilGonefishing]

Crazy. Subscribed. I want to build one one day. I’m following this. Keep the beard!

[@pano-rific8838]

And the Epic journey continues... next phase. Thank you for the awesome editing and time laps. I'll be watching. ;) ~ your neighbor

[@flyingclint589]

I loved the middle part with Wilson! That was hilarious! I think you spent a little too much time in that hangar! Ha!

[@crazyhumpy]

Awesome to see you getting some progress on Defiance! FWIW- Mike Maiers has been doing that cantilever style suspension on cars for a long time and it works amazing. I understand, they are cars and don't technically land, but it works way better than typical suspension as far as rolling due to side loading. (Car guy wishing I was a plane guy to)

[@JonasMarcinko]

Awesome to hear!!

[@adventurousairman]

What a stud, Skidattle !

[@tonyloechte9994]

It's coming along nicely,now Wilson has to get his ppl.

[@jschifferle4265]

I have designed and built race cars with exotic suspensions. You have a great design and I was wondering when somebody would finally do that on a STOL. I thought Mike Patey would. Follow Mike's lead with a carbon fiber carbon fuselage for strength and safety. Speaking of safety, please consider braces or mounts that will direct the engine away from the cockpit for a 60 mph or less nose crash. If competing in STOL Drags, I would consider rollover protection (I know... extra weight) in case you catch a wingtip or landing gear when you slip at low altitude to reduce speed. How about massive speed brakes instead of slipping? GREAT NAME, by the way. Keep this build vlogs coming, they are great.

[@JonasMarcinko]

Thank you! The more I think about it the more I may add a few more supports for the un wanted crash. I’ve thought about a large speed brake flap that comes down underneath the fuselage.

[@f48films33]

You through in the slow mo grinding. Lol. Build it and they will come lol. Field of dreams. Nice work Jonas.

[@cigman2000]

Hurry back Silvija! We miss you! Oh yeah, great video, Jonas! Can't wait to see Defiance overcome gravity!

[@GeekOfAllness]

Can't wait to see Defiance … DEFY … gravity!

[@CyrilDeretz]

This is making good progress Jonas. As far as the landing gear is concerned, think of the lever effect on torsion as you will increase the length of the gears. You need to design them so they have good torsion control (a bit like your fuselage)

[@user-qh5yg8ps6l]

Your emphasis on running the tubings full length for structural integrity to compensate for the torque developed at the higher HP and speed is a lesson to be reckoned with. Maybe Yogi-scout will someday meet Defiance. Thanks for sharing, MJ.

[@GarrettMBishop]

The Wilson bit was hilarious!!!!

[@FatherTech]

Holy shoot I died laughing at 5:18. I'm thinking Jonas went crazy in his basement with this build... Then he brings out Wilson! OMG dude pure gold bro, pure gold.

[@mikercflyer7383]

Good luck to you will be following your progress.

[@JonasMarcinko]

Thanks Michael!

[@valterp528]

great work

[@MrGaryGG48]

Jonas, I think you were on the right track early in this video when you were talking about the triangle vs the square frame. The triangle is inherently one of the strongest forms in nature/engineering/whatever you want to call it. Making it fit your needs in the airframe may be another issue though. Applying it to a practical fuselage might not be all that easy if you want usable space inside. The project is looking really good. We'll be watching... (I've been wearing a beard for more than 40 years . My wife of 38 years has never seen me without one. When she saw an old photo of me in my Navy uniform, she asked, "Who's that kid??") ;^)

[@javabean252]

Awesomeness bro.

[@danaskubic2145]

I miss Sylvija .Thanks for the video.

[@JonasMarcinko]

I miss her too!

[@songmaster9308]

I like your fuselage design, and a lot of what you say makes sense, and if has been done in the Capella, then that's even better. That triangular tail section though - I want to add more to that single tube top :D

[@ruben0227]

Can you do a walk around video of your Capella?

[@dmitrychemankov3309]

You are cool, man! Great respect to you!

[@courtman007]

Good Job!

[@Graybear78]

Nice job! I love it! It's the only way to keep a frame straight. But you've definitely been working too hard. Even Wilson says so. Yeh, we have an inside channel! Love the beard!

[@aserta]

If you get tail shimmy, then ..maybe add some tension wire from the cockpit to the tail structure's tip? I've no idea if that works for airplanes, but in other structures of light design, whenever you observe a tendency to move, you strap it with wire (if the project doesn't allow for more structure to be added). Best parts about using wire, it's light, and you don't need crazy amount of tension on it, just enough to cure the wobble.

[@derotracing21]

Good stuff dude!!!

[@JonasMarcinko]

Thanks Brody!

[@bozzwozz9241]

What if you could have a "lock out" shock for take off? Locks compression in high cross winds?

[@leeh9931]

She is really coming alone, great work, it’s awesome that your designing your own plane, I’m working on a 37% Pitts challenger that I have modified from The plans a bunch it’s gives you certain level of accomplishment. Can imagine the hour you spend in cad 😂, so you have some cad pics you can share?

[@JonasMarcinko]

nice! that will be fun. Yes. hours and hours! I would rather not at the moment. need to keep the suspense :)

[@chorrell151]

Super impressive build - way to jump right in! Just a suggestion - if you want to put some real numbers behind the hunches about what adding/removing/re-sizing certain tubes will do in terms of torsional or bending stiffness, Solidworks has a great module for evaluating the strength of tubular weldments. I think you can get a free seat of Solidworks as an EAA member, and I can send you an example of a bushplane fuselage analysis I did. It can be really surprising what you'll find.

[@ewarrin]

Damnit, now I want to build a plane! But seriously starting to get my pilot license because of your channel. Thanks for all the inspiration.

[@JonasMarcinko]

love this!

[@137_DeathValleyCAL]

me too!

[@aserta]

Do the kit-fox suspension, just use a cantilever lengthwise design for yours. Shocks get hidden inside the fuselage, forces get distributed lengthwise, weight distribution is up to your needs (longer or shorter tie rod after the lever brace (or however it's called), what's not to like? F1 does it, they face the same issues (outside of shocks, but that's not an issue considering desert racers use it and they're just fine) as you do. Air travel, weight distribution et cetera.

[@dickmoore7341]

Your biggest challenge seeing as you plan on competing with it is to make it strong enough to be safe but light enough to be competitive. Don't take too many short cuts Jonas, that video of the front of that plane falling off on landing was trying to tell you something. And if Silvija told you to shave tomorrow I'm guessing it would be gone in a flash......lol

[@0616ko]

Awesome. You and Wilson freaked me out a little though. :)

[@marksholcomb]

Airplane Design as an Art Form is a very scary concept without a few simple engineering calcs.

[@andrewutter2924]

I'm definitely going to make a plane!

[@mikaelljungberg1019]

Good luck with your build.

[@goriverman]

Love these video’s

[@danawalker55]

Man, I can't believe you hung up on Silvija just for us. Can Wilson mig or tig worth a crap? I enjoyed the tech talk, the smoother gear sounds great. Now, back to work!😆

[@ibangecwt]

Nice work Jonas. I also came up with that same gear idea and then discovered stinson had done it before. I'm not as clean sheet as you are with your design so I've had a harder time incorporating it but who knows, maybe one day. I'll be interested to see how your design comes together.

[@JonasMarcinko]

Thanks Ian!

[@f2air]

I'll be looking forward to these build videos as much as I will Scrappy's.

[@01spm]

I am glad i found you, definitely following you.

[@brucecharette1521]

for a little added security for your frame in the ceiling put some come-a-longs in place. Takes away from the crash factor. :0)

[@yankey4]

NICE brother. Just found you. Thanks for sharing. God Bless..

[@3456fly]

Trent, In regard to the gear design, keep in mind a potential safety issue with legs in a crash. Had a good friend lost in a super cub when he was trapped.

[@jschifferle4265]

After thinking about your inboard shock absorber system, I realized you need a sway bar to connect the two struts. Without the sway bar (assists in allowing cars to corner flat) it is possible to suffer the Draco takeoff crash when only one side of the suspension compresses due to a crosswind. Also, I'm not sure about the copy of the Capella fuselage for torsional stiffness with a 350 hp engine. Maybe a 100 to 150 hp engine might be okay, but the Capella wasn't designed for hot rodding. I think you should follow the Scrappy build and cover the birdcage in carbon fiber. Then you should be able to handle Scrappy (500hp) power. Actually, a carbon fiber monocoque design eliminates the birdcage while saving weight and increases strength. (Your next build) ..... Back to work

[@JonasMarcinko]

J Schifferle I had the same thoughts about the carbon. And also thought about adding the two down tubes to the top of the firewall :/ but ugh it adds so much weight. I may see how the suspension works before adding a sway bar. It may not be that acceptable to the crosswind loads. But we will see!

[@jrs9144]

@@JonasMarcinko Hey Jonas, I hate to keep bothering you on the suspension, but this was my speciality for about 5 years, and I don't want to mislead. After doing some calculations in my head, I forgot how high the CG of your plane which will amplify a roll moment in a turn or in a crosswind. The sway bar will probably be critical. With this type of independent suspension, if you compress one side with a load from a turn or crosswind, the other side that loses the load and starts a catapult force that throws more weight to the compressed side which exacerbates a bad situation. The sway bar will prevent the lightly loaded side from transferring more weight by lifting that wheel which caused the load to transfer back and thus reduces the load and roll to the compressed side. I hope that wasn't confusing but with a high CG, roll rates are very important in vehicle stability. Thanks and that's my last input. Have a Merry Christmas and New Years. John S.

[@JonasMarcinko]

John Schifferle I’ll always take some input! I totally agree. I’ll do some thinking. Merry Christmas to you too!