Lost & Found The Airplane Skins - Sling TSi Build Update - Mojosling Build

[@tda3fjr]

Just some feedback. The reason that you had to "drill some more" is that the drill bit was at an angle (you'd get a time out doing that where I worked.). Therefore, the hole is at an angle. Yet you were trying to insert the rivet perpendicular to the surface of the panel. The correct technique is called "spotting the hole". With the bracket cleco'd, touch the drill bit (running) thru the hole in the bracket. This will create a "spot" on the panel. Once you "spot" all the holes, remove bracket and, using the "spots", drill through the panel making sure the drill bit is at 90 degrees to the surface of the panel. Reassemble using cleco's and rivet the assembly in place. This takes a few more minutes and an extra step or two, but it's the correct way of ensuring that the fastener hole is correct such that the rivet swells into the hole in the correct manner. On non-structural items, like that bracket, it's not such a big deal. However, IMHO, you need to learn proper techniques because when you're assembling structural components, it's pretty critical that holes be drilled properly and of the right diameter for the stress load paths. I'll stop before I get off into the weeds

[@zutrue]

Nice feedback. The episode was long enough so that some well informed eyes could catch things of this nature. Hopefully the builder will take advantage of the feedback for the valuable resource that it is. Great observation @tda3fjr

[@tda3fjr]

@@zutrue Thank you. After almost 40 years of being in aircraft production (engineering), you pick up a thing or two here & there. LOL

[@MrWATCHthisWAY]

tda3fjr - a small 90 degree drill would work well for a good portion of this build or most aircraft builds. I am cringing when I see them angling that drill bit into the structure and then using pull rivets. I know these will work loose over time and they will be in positions that are going to be almost impossible to access. I know these kits are designed for quick assemble but using pull rivets when you can use a solid has me at odds. I don’t know the life expectancy of the aircraft but I’m going to guess it’s not going to be in the 10,000 hour range without replacing a good amount of these rivets. I wonder if the factory provides oversized rivets for these builds? I also didn’t see any go-no-go hole gages during this build either?? Just drill and pop. I am amazed how well the parts fit together from the factory!!

[@tda3fjr]

@@MrWATCHthisWAY - Well......since YOU brought up the subject of those "pop rivets". LOL I have to temper myself from time-to-time when I see something that goes against everything I've learned concerning building aircraft. Over a 35+ year career with a company that arguably builds the finest biz jets in the world, I've literally engineered the construction of various portions of those aircraft from radome to tail cone. Anyhow......IMHO, those pop rivets would be acceptable for non-structural brackets/assemblies. Yes, they have a limited life cycle which goes down very quickly if the hole diameter isn't held to a decent tolerance. Since the manufacturer supplies the drill bits, I'm assuming the bits are "production quality" bits. What I would worry about is a person doing the build, who doesn't understand the theory of mechanical joining of two components via the riveting process, would pick up a Harbor Freight bit and think they're good to go - OR wallow the bit around to open up the hole slightly as seen in the video. Sorry....IMHO that is a NO GO!! As for the structural assemblies that are responsible for carrying the loads that (hopefully) a stress engineer calculated; again, I'm assuming the manufacturer is supplying "production quality" rivets. My worry is that a novice would not understand how the stresses are carried and the load paths and would think they could substitute a rivet from a big box store. Having said that, if I were gonna build a Sling, my build costs would go up pretty quickly since my anal self would over build using solid rivets, deburring holes to prevent stress risers, sealing holes/joints, priming areas that I would not have access once closed, using close tolerance fasteners, hi-shear fasteners, etc. Anyhow..... As for holes lining up and part fitment, the manufacturing process of holding amazing tolerances has come along way. Back when God was a Corporal, you never put all holes in adjoining parts and you never had the holes full size. Now with the precision of 5 axis machines, you get incredible part fitment which translates into decreased build cycles. I'll STHU now, since I can hear folks snoring.

[@MrWATCHthisWAY]

tda3fjr I was an fabrication engineer for Boeing for 27 years after flying for the Navy for 8 years and I have my concerns about these builds. Like mentioned I hope the design engineers have allowed for these misalignments in their streets calculations. I worry about the stresses that landings and G loading on the airframes can produce. I love the aircraft design and it’s capabilities with such a small engine package and I serious about building one myself but I would be anal too in my build. I could see in their fabrication that the drill bit had some rivet heads on the bit so I guessing they had to drill a few out and that can be a pain in the butt with pull rivets knocking out the lock ring and pushing the stem down to drill out the rivet. But I love the aircraft.

[@joelonderee2872]

Mike, I am so proud of you being the cover story on my favorite magazine for almost 60 years, Popular Mechanics (just got my latest copy). You are doing excellent work and always looking forward to your videos. Keep up the good work.

[@mojogrip]

Thank you sir.

[@fish7days]

Congrats on the Popular Mechanics cover !!!

[@jimgoff1170]

Very cool to have the professional help on such a long and intensive project, I am just a worrier about all the tools and rivets being temporarily stored on brackets inside the structures. Please make sure nothing gets left inside a closed off area.

[@JB-eh2sd]

She’s coming together nicely with the Sling crew helping to guide you thru the build. Looks like you’ll have the 51% rule covered with ease. Now, Back to Work 🦾. Great video

[@anunnaki64]

Thank you Mike for sharing this experience!

[@carlnordholm2226]

It’s really cool to see the process of building an airplane in real time like this. I love these kinds of videos. Greetings from Sweden🤘

[@skippersmart]

coming to STKLM the week after, amazing city !

[@kevinrtres]

@2:24 - drill in reverse - been there, done that!!!! 🤗😀

[@eduardogarciamontesdeoca5935]

I’m seen your videos about this plane and I’m seen what to do to get my own kit... it really encourage me to pursuit my dream to become a pilot and build my own aircraft.

[@pano-rific8838]

Tee shirt, "No Prob-Laama" says it all. It's coming together bro. Thanx for bringing us along. ~ your neighbor

[@charlescummings932]

Thank you so much for demystifying this process. A wealth of information. You should be getting paid for this.

[@allanhall6105]

Thanks so much I always was curious on how they was being built

[@petercampbell264]

Mike I love your videos. Please wear safety glasses

[@RalphWilliams300]

Congratulations on you Popular Mechanics magazine cover opportunity. Good stuff!

[@asiasmells71]

Nice plane nice build.. But if this thing comes in at 51% I would be extremely shocked.. At this stage one would think you would not be fumbling on very simple tasks at this point.. But if sling wants to move things along quicker for you for some good PR.. I guess lucky you.. Will get u in the sky's quicker

[@MichaelLivingston-me]

Excellent Mike. I enjoy seeing your progress.

[@richardchan1634]

The Sling TSI is cool. I like the way you explain and your expression is very articulate, in particular helpful for a foreigner. May I know that this machine can be used for getting PPL, CPL, IFR and CFI/CFII training and build time to ATPL?

[@tyler_russell]

Hell yes! Bringing it. Hope we see the mating process.

[@marcusfrazier191]

Coming together congratulations

[@petercawley8444]

Wow it's looking like an airplane. Congrats, Mike!

[@marklandry2509]

He didn’t debarred the rivet holes after resizing them on the antenna mount... I hope that was just an oversight and not done on the entire aircraft.. if so, you’ll run the risk of corrosion from the burr slivers later... and worse, you run the risk of stress cracks forming. It takes a good bit more time, but if my butt were strapped in that airplane at 6000 feet, I’d feel a lot safer

[@ctsteve1967]

MARK MOST OF US DO NOT CARE ABOUT YOU

[@marklandry2509]

Greg apparently you don’t care about Mike either

[@toddb930]

Hey Mark, to deburr the holes would you have to take it apart after drilling, do the deburr, then line it up and rivet?

[@marklandry2509]

Todd B yes... cleco, drill, un-cleco, deburr, re-cleco then rivet... that’s what most manufacturers as well as the EAA recommends... that’s what I had to do on my Lazair that I built in the ‘80s.

[@flutetubamorg]

It's my understanding from earlier vids that the holes are usually already final hole size and matched. He's not resizing the holes and not introducing any burrs to deburr, at least that's the impression I've gotten from these newer age kits.

[@rscarbrough91]

It’s coming together!

[@BxCortez2050]

Nothing like building things with your own hands

[@zutrue]

Nice video. I was actually riveted, no pun, to this entire episode. Well done.

[@bakedbeard4203]

New favorite channel . Getting high watching you build something that’s going to get you high . Lol

[@evandrosantos6510]

Hello @MojoGrip, Would you think of installing a weather radar on your plane? If so, would it still be better installed?

[@mikespeers]

It looks like you are at the same spot KZbinr Evan Brunye was Dec. 21. The holes did not match up on the rear skin. It looks like Jean d'Assoville drilled out the mismatched holes. Did you guys have to use larger rivets or did I misinterpret your video?

[@wishicouldspel]

Great observation

[@carlosalcantara7197]

It's looking great, what is the maintenance on the parachute and all it components?

[@1shARyn3]

"bars" = Longerons

[@KutWrite]

I thought they were called "stringers."

[@TechViewOpinions]

Would we as regular builders have Jean around in the shop on our own build? How many hours have you spent to get to this point?

[@challenger2ultralightadventure]

Would you not want to mount the GMU onto the bracket before you finish putting the skin on? On the Stainless Steel Firewall, is there a primer coat applied before installation, so it won't corrode at the points where it comes in contact with Aluminium?

[@27degrees]

All aluminium parts on the Sling are alodined (chemical conversion coating primarily used to protect aluminum from corrosion)

[@chetmyers7041]

18:01 When do holes have to be "de-burred" after drilling? "Hey ya'll." Is Mike a Georgia native?

[@toddshaw2492]

Nice Work!

[@benderaviation]

Looks like its coming along nicely. I may have to fly up to torrence from SDM and visit the build.

[@tomdavison9107]

Great video!

[@raider6511]

Your pretty popular here in TEXAS, I saw a business with your name on it, MOJO COFFEE SHOP. Well maybe it's not named after yea. Never know. Keep makin these video's and keep shown the makin of your airplane. Looks nice so far.

[@superskullmaster]

Those Cleco pliers look way more annoying to use than the ones we use at Lockheed.

[@SH256-j5g]

Hey mike what's the thickness of the skin ?

[@trentcox5024]

What does TSi say about priming all the interior surfaces? I have done a lot of research on this topic and have been unable to really come up with a straight answer. The one that makes the most since to me is it is best to prime to minimize the possibility of interior corrosion. Any thought on this topic?

[@sport2175]

If I ever build a plane I intend to only prime the parts called out for priming by the plans. Then every few years have the airframe fogged with ACF50 or CorrosionX. Save some weight, money, and build time that way. If I lived near the ocean maybe fog it every year, if I was building a float plane then prime everything.

[@mojogrip]

Trent, rather than prime every little parts, we will be priming after the entire airframe has been put together. Both interior and exterior will be sprayed down. Easier and more effective.

[@Hattinchannel]

No anti corrosion paint on the Inside ?

[@ctsteve1967]

DO NOT NEED IT. COST IS VERY HIGH FOR THAT.

[@Hattinchannel]

@@ctsteve1967 ok so any idea how long the aluminium will last ? I assume now that the owner has built it himself he would simply change the pannel?

[@marklandry2509]

Greg Plaka the cost is even higher to replace corroded aluminum 10 years down the road

[@27degrees]

All aluminium parts on the Sling are alodined (a chemical conversion coating primarily used to protect aluminum from corrosion)

[@phillipstuart3318]

Orange and white is a color profile I would have picked beautiful plane

[@travisw9071]

Interview some peeps. Seems like some awesome dudes

[@supportmanagement]

I see they have the Quick build option which adds quite a lot of money to the kit. What does the builders assist program add? Are there no dealers in the South East? Im in NC and would love to see one and take a demo flight. How is your build going?

[@ValentinoDagher]

Are all the rivets blind rivets?

[@KutWrite]

Nice! If that's gospel music it's quite appropriate. It's August 2020. I just realized you're probably done building it by now. Some time could you show how the rivet machine works from the back side?

[@DarrenJohnson1973]

TAF are doing a great job of building your kit for you, when is Mike doing any part of the build?

[@john9663]

The Sling kit certainly looks a lot more "user-friendly" to build than the Vans kits!

[@marklandry2509]

John amen to that... pop rivets instead of standard rivets... heck of a lot easier and faster. Although the RV-12 is mostly pop rivets

[@fixcom9991]

Buy stuff to put inside to make it as quiet as possible when you're flying. That will be good for your video production.

[@coeu8967]

In europe the low for build airplane from kit is quite different, the autority can't give the certificate Builder to Group of Pilots like in USA,

[@derby9175]

What are them weird clips you’re using as temporary rivets?

[@dylanrudney8629]

Hey Mike do you know if Sling is planning on ever coming out with a 6 seater? Thanks!

[@ian1064]

I don't think there are rotax engines that could power a plane like that efficiently yet.

[@OperatorBayArea77788]

Hey can you make a video on the insurance between factory vs experimental aircraft route Please 👍🏽

[@JessicaSimonson1976]

How come you're not lightly sanding underneath the rivets before riveting aluminum....it gives it a chance for better adhesion when painting..

[@kevincarpino]

Hey Mike are you going to Oshkosh 2020 is so lets grab a burger or something love your videos man keep it up!

[@767driver]

Button spelled incorrectly on your video reminder. Great job on build so far!

[@JK-jb9le]

Hey Mr.Mojo I'd like to come and train and work in your shop man!some tips plz

[@stevehenson755]

Really cool just subbed

[@ramonkey2939]

Cool

[@DEEBIGO1]

Try to hold the drill straight bro

[@danizweifler6061]

well.... "MojoGrip"...........; able to fly a plane doesn't necessarily mean beeing able to build a plane..... :-)........the way you handle tools show's it......:-)..... // neverless....; congratulation that you have the guts to show that you would never be able to do it by yourself withouth constant monitoring and guiding of the other factory guys.....

[@smoothuncut]

"The MOJO SLING"

[@garrygballard8914]

🙋 Mike ✌

[@NovemberMoore]

I noticed a few times you keep saying you're not sure if you're going to get a video angle, if you put the GoPro on your head you will have a better POV angle and whenever you turn your head it will be as we're looking through your eyes

[@mojogrip]

The last set of videos, I had the GoPro on my head. Several people recommending I use a chest brace instead to get a better angle shot, so there :)

[@RamonAlmodovar]

sorry .. new to the channel .. is it a sling 4 kit >>??

[@mojogrip]

Close. It's a Sling TSi

[@johndough7160]

I'd be so pissed off if those holes didn't line up. ...heehee... 😱😁

[@rixtrix11]

Surprised to see the use of cheap, awkward handling rivet guns in a production situation; not the cordless one Mike was using.

[@DanFrederiksen]

Are rivets air and water tight? I can't help feel that a single piece fiber composite construction would be superior, both easier and faster to make and stronger single piece. Also nicer surface

[@ctsteve1967]

NO

[@Kosmonooit]

Tell that saffa to say "aluminum" properly

[@kevinrenville4030]

Going to be nice, but seems a little disorganized. We lost the skins??? That would concern me.

[@johndough7160]

I'm not afraid of dying from something going wrong while in mid air but I am worried about getting so badly wounded, that I'll be in even more pain than I am now. ...lol... 🤓 I keep dreaming I fly helicopters and I don't fly anything. That shop is nice and clean. Someday, plane bodies will be three D printed. You watch...lol...😁

[@Turjak_art]

Nice update! But I'm sure I can build this kit 4x faster than you. When you're holding machines it's a pain for my eyes.

[@yahatinda]

BASICALLY THIS PLANE IS BASICALLY BEING BASICALLY BUILT LOL

[@mmichaeldonavon]

The guy drills the holes and asks Mike to install the rivets - that must be part of Mike's 51%. Are you actually getting "Go Fund Me" donations to build YOUR plane? Long way to go to find $300K+ What do the people ,who donate to you , get for THEIR money? Call me old fashioned, but I NEVER heard of someone else paying for a builder's build. Maybe a BANK. I liked your final statement in the video: "I'm heading back to the East Coast, and I'll be back in a FEW WEEKS..." A FEW WEEKS? Then, who's building the plane, in your absence? Oh, the Factory is. It will be a factory built plane and your name will be in the FAA records as the Builder. How cool is that!

[@JackilusMaximus]

Enjoy your content! Keep it up!!!! However, can you please start including “g” and “d”s when you are speaking!? You are a smart dude, but it would be really helpful if you pronounced them!

[@danamiller2673]

Why does he have to conform to you if you don't like how he pronounces words click to someone else, extremely arrogant on your part.

[@JackilusMaximus]

@@danamiller2673 It is a part of speaking a langauge, you include letters that are not intended to be silent. The aviation community is generally well educated, and I like Mojo's content, but am offering some construction criticism, which other viewers may find off-putting. Languages have rules, and no matter how many we speak, we should "conform" to the rules! Thinking that I care what you have to say about my criticism is especially arrogant.

[@danamiller2673]

Then why did you reply

[@waqarsyed6641]

Mike

[@llsmith8271]

Hi Mike, sorry to briefly detract from this vid but was curious if you've checked the perf. stats on this plane? kzbin.info/www/bejne/jJWch6Gdf9mqZsk Not sure why but they seem to have little internet presence. Makes me wonder if they went out of business. Amazing perf. numbers. Glatio is sick. Would love to hear your thoughts.

[@jimd3541]

You're not building it you're taking photo opportunities the Professionals in the background or building it but at least you're learning

[@extremereclusefallows5779]

You should get your A & P license. If you can build an airplane, you can certainly learn a maintenance craft. Will save you a lot of money during your flying career. Still want to see you sitting in the cockpit making engine noises. Where will your first non maintenance flight take you. $150 hamburger?

[@waqarsyed6641]

Mike