We have a RUNNING ENGINE! Will it RUN? - Of Course! Rotax 912 Aircraft Engine

Overhauled Rotax 912 ULS spins back to life in this episode!
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[@ManNomad]

Your involvement in the rebuild, maintenance, break-in operation, working with expert educators, is the beans! Flying with that engine having such an intimate knowledge will make it safer and more engaging. You are officially a "gearhead" and a "wrench" Congratulation!

[@ExperimentalAircraftChannel]

Exactly! Love to be involved in every step of the process where possible. That's the point in doing all this. Learning. Thanks for your support!

[@fpvflyby6855]

Man I live this Video! It’s good to see a father and Son working together like these guys do, and I also love your excitement! Great video

[@joelmoore9697]

I've never seen you so excited. Congratulations

[@ExperimentalAircraftChannel]

Hah! It was EXCITING! Truth!

[@chandalarranch]

Thanks for bringing us along on your build.

[@challenger2ultralightadventure]

Sweet! Always a great milestone when you get an engine running. I ran my engine last weekend in it's final configuration and setup. Felt great! Posted the video on my page. Cheers from Winnipeg.

[@ExperimentalAircraftChannel]

Awesome! Congratulations! Yes... that first initial pop of the first start I'd as exciting as a Firecracker! It's the reward for the work! 😊

[@joeo9980]

Thanks Bryan for this video and all the great work you do for our community!

[@ExperimentalAircraftChannel]

Well THANK YOU for much the your support! :-)

[@williamlanphar630]

Happy for you. These guys instill confidence.

[@ExperimentalAircraftChannel]

Thank You! Exciting times for sure

[@robertlafnear7034]

Nice little engine,.. got close to one at OSH. back in 2018 and I was surprised at how small they are🤔 for the H.P.,... need one for my new DR CHINOOK😁..... thanks for the shop tour.

[@ExperimentalAircraftChannel]

You picked up a DR? Awesome! You'll have to bring it to a show next to Dan Reynolds one day! :-)

[@robertlafnear7034]

NO NO Not yet.... BUT when I do this WILL BE THE engine..... oh boy,.. sorry 😅.

[@n206ja]

So great that you got to participate in your engine rebuild! I'm sure that'll give you great confidence in that engine. Now get back to building! LOL!

[@ExperimentalAircraftChannel]

Yes. After having another style engine built for me and changing plans several times, I very much wanted to see the entire process. Thanks for stopping by.

[@majedalsaeed4388]

Happy for you :) I noticed that when you start the engine in front of the hangar, there are no red paints or markings on the ground indicating a boundary for safety. This could potentially pose a risk to anyone in the vicinity, as they might not be aware of the danger posed by the propeller. Thanks

[@mhilderbrand7693]

You are going to have one nice engine!! Thanks for sharing, this was fun to watch!

[@ExperimentalAircraftChannel]

Let's hope! Congratulations on your project completion and FIRST flight! I'll be catching up with you soon! Flying 2023!

[@mhilderbrand7693]

@@ExperimentalAircraftChannel That’s awesome! Can’t wait for your flying videos!

[@MrTreetall100]

Love the channel, watched every episode!! :-) Wondering why you opted away from the Big Bore kit? Fuel efficiency? Too much power? Thanks and keep it Up. Patrick from Ottawa Canada!

[@ExperimentalAircraftChannel]

It was an older Style kit for one. Secondly I've heard that they run slightly higher cylinder head Temps. Lastly... usually consume more oil. And I've never owned or flown a stock 912ULS before and I want to get to know the engine from a baseline before mods. I can always improve on it later. :-)

[@TheUllrichj]

Nice overview of what is involved. Looks like you’ve got some great help getting things ready!

[@ExperimentalAircraftChannel]

Thank You. Yes... I like to get involved as much as possible where possible. Hoping to FLY this year!

[@robertwalker2568]

Excited for you!

[@billiondollardan]

It's amazing you get 100 hp outta that tiny thing

[@spannaspinna]

They get hot if you bulge them

[@scottmiller4711]

Congratulations on the “new” engine. Nice video. Now to complete the plane!

[@ExperimentalAircraftChannel]

Yes sir! On it! Even in the summer heat! 😊

[@clintgosch2306]

Great news! Keep at it buddy!

[@ExperimentalAircraftChannel]

Thanks Clint! Another milestone!

[@straightchad8059]

Geat video , valuable knowledge gained .......thanks .

[@ExperimentalAircraftChannel]

Thank YOU. Much appreciated.

[@kimprout1961]

Question: what did you use to compress the piston rings. That’s one critical step in assembly where rings get broken very easily.

[@SimjetAU]

Can you post the run in proceedure with RMP and times please?....4000 rpm for how long?...pulsing the throttle 5 or 6 times from around 2500 rpm as a idle

[@jaredbrewer4586]

Wish I knew you were here, I'd a called in sick to visit for a bit. Just a mile south. Come back in October for the fly in please. Love your Channel.

[@ExperimentalAircraftChannel]

Haha! Well then. Thank You. I'll have to see the schedule. Sept., Oct., Nov. busy fly-in months for Aviation for sure. Peak season it seems. I may stop in over there end of week next week.

[@tomcoryell]

Hi Bryan, Do those engines have a pretty short stroke? I like that oil level trick! Thanks!

[@ExperimentalAircraftChannel]

If you can see the size (height) of the New Cylinders that gives you an idea. But yes, they have to turn around rather quickly producing peak power around 5,800 rpm. Etc.

[@tomcoryell]

@@ExperimentalAircraftChannel That’s what prompted me to ask. Those jugs look awfully short!😉

[@oneninerniner3427]

​@@tomcoryell 912 uls are an 84mm bore X 61mm stroke, 3.31" X 2.4" for 1,352 cc or 82.5 cu. In. So that's a fairly large oversquare engine. Hench the rpms. 👍

[@foesfly3047]

Now that this Break-In run has been performed on the test stand, will a further Full Break-In be required for the first several hours of operation, on the plane?

[@ExperimentalAircraftChannel]

Honestly. With so much going on still with the Airframe build, I haven't gotten into those details yet. Just picked up the FFW Kit from Zenith so we can begin mounting the engine. Soon after OSH23 that should happen. Will dive deeper into the engine procedures soon after. Thanks for watching!

[@ozarklanding]

What’s the history of your engine? Did you buy a core?

[@petec9582]

Are any of the Rotax engines certified that can be used in older certified aircraft?

[@flyingkub]

So your plane is another big step forward. Great stuff!

[@ExperimentalAircraftChannel]

Exactly! Another huge milestone in the Build process. Thank you!

[@johnburns9950]

Awesome. One step closer to Zenith Homecoming. 2024?

[@ExperimentalAircraftChannel]

Haha! Yes sir! It will make its way "Back There" soon enough!

[@robertwalker2568]

So this is setup for what aircraft?

[@dieseldan5189]

Rarely have I seen a Rotax 912 being overhauled since the cost of parts and labor is in the stratosphere for 4stroke 912. They are normally considered disposable engines since it is usually cheaper to buy a new one then rebuild one.

[@flysport_tedder]

it runs! that's great! ah yes, the rotax burp.

[@2779mattie]

What kind of plane do you have, if you made a video on it I must have missed it, just curious.

[@bruceyoung1343]

AWSOME CONTEY. Guy in blue t shirt I thought for second that’s Phil Collins

[@ExperimentalAircraftChannel]

Hah! 😂 That's what people are saying.

[@yurimig253]

How much does this cost you... I'm possible looking to have this done to my 80 hp

[@KitfoxPilot]

I thought you were using a Franklin engine at one time?

[@lcprivatepilot1969]

Congratulations!

[@ExperimentalAircraftChannel]

Thank You! Exciting times for sure!

[@22rpbj]

Any chance your interested in selling the big bore parts

[@ExperimentalAircraftChannel]

It was an older kit. And started to show some wear. So... unfortunately it is just going on the shelf as a display now. 😮

[@oneninerniner3427]

​@@ExperimentalAircraftChannelNow get that airplane built, we wanna see it fly! Lol. Say how many mms oversize was the big bore kit? Just curious if you know. Gravity Knight Flying has a turboed big bore on his S7 Courier, but he flys the mountains out west too. So that helps him maintain power at those high elevations.

[@22rpbj]

Thanks for the reply. Was not able to respond from China.

[@bigmuz_pilot]

Why remove the big bore kit?

[@ExperimentalAircraftChannel]

It was an older design/style (steel cyl) and was showing some wear on the cyl walls. Wanted to bring it back to stock for efficiency.

[@cohocarl]

Congrats!

[@ExperimentalAircraftChannel]

Thank you! Exciting times!

[@doncatchpole]

Why would you give up the big bore option?

[@ExperimentalAircraftChannel]

The one that was on it had 260hrs. An older style with STEEL CYLINDERS. it was showing signs of wear. BB KITS often run higher cyl head Temps and consume a bit more oil. FYI. Plus...I've never really flown behind a stock 100hp for long. I'd like to get to know yve engine as it was.

[@doncatchpole]

@@ExperimentalAircraftChannel good reason

[@doncatchpole]

@@ExperimentalAircraftChannel what ever happened to John Brannon and his scratch build lsa bearHawk.

[@JAYJAYJAY53]

I have one hell of a time seeing the oil level on my Miata due to changing the oil constantly. That method will now be used by me.

[@ExperimentalAircraftChannel]

It's a great little Tip/Trick right? Thanks for chiming in!

[@JAYJAYJAY53]

You vary the speed even on a rebuilt car engine.

[@JustFlyer7NC1]

Why is it configured as a pusher? I thought it was going on your Zenith?

[@michaelspunich7273]

Keps the tester from getting beat up in the wind blast.

[@JustFlyer7NC1]

@@michaelspunich7273 for sure but I thought the gearboxes were configured to accept the thrust in one direction only.

[@ExperimentalAircraftChannel]

It is in fact going on a CH750 Cruzer. This was just for initial test break in. It's how they run ALL engines at their shop. Will definitely be using it in the Tractor configuration. Now... to decide on a Prop! 😊

[@FlyingShotsman]

@@JustFlyer7NC1 Yep, exactly, and the engine is supposed to have prop blast across the cylinder fins for cooling, which is especially important during break-in when ring friction is highest. If the operator doesn't want to stand in the prop blast, then remote the controls or install a windshield on the stand. I also cringed when the guy dismissed the Rotax oil purge procedure. It exists for a very good reason: these engines have hydraulic valve lifters that can be damaged if the engine is run with air in them. Several items in this video made me nervous.

[@michaelspunich7273]

@@ExperimentalAircraftChannel No high inertia props! Kudos for breaking it down and finding that bad shim.

[@bappyhossen412]

Beautiful

[@ExperimentalAircraftChannel]

Thank you!

[@bappyhossen412]

@@ExperimentalAircraftChannel I watch your every video from Bangladesh

[@ExperimentalAircraftChannel]

@@bappyhossen412 Thank You for your support! Very much appreciated.

[@embededfabrication4482]

I got a parachute, my plane is only worth 7 grand, I don't worry about things anymore

[@acengineer737]

You lost me when they said they didn’t need to do the oil primming procedure,cos they’re experts. That was after watching the wrist pin being put in with a hammer.

[@Lewthor]

why don't they build it on a rotisserie so it's easier to line up the cylinders/pistons/heads/tubes rather than reach in under the cylinder and blindly line up the tubes?

[@ExperimentalAircraftChannel]

If they did this in more of a "Production Environment" then maybe so. I've seen what you are speaking of. Would make the process easier for sure. :-)

[@silverfoxtrot8297]

I WAS THINKING THE EXACT SAMETHING. GODBLESS

[@Patshes]

🆒😎🤘!

[@ExperimentalAircraftChannel]

Thank You!

[@yeagermcbipper9008]

You ABSOLUTELY DO NOT READ THE MANUAL. Rotex makes a point that all fasteners are first applied with 50% torque value then torque to final value... this is to properly seat/seal assemblies. Its a basic tenet that you RTFM before doing maintenance. You fail HA HA

[@ExperimentalAircraftChannel]

In all honesty, we didn't show all the steps in the short clips here (not to bore you with the long proceess). There are several of the bolts that you tighten, then loosen, then final torque.

[@AussieDazza]

It is Rotax not Rotex . You fail