Homemade Radial Engine part 7

[@georgemason8521]

Finally a push mower that bogs down for nothing. The B24 Liberator of push mowers. Very nice!

[@marvthedog1972]

lol.. excellent point and comparison!..

[@georgemason8521]

@@marvthedog1972 Mr. Mekaniska has a creative imagination. Certainly worth some creative banter.

[@gerbdnas]

B&S-24 Liberator

[@misters2837]

When I was a Kid I had access to all kinds of nearly free push mower parts...And needing something that would mow thru anything I built an engine that started out as a 3.5hp mower chassis...plus....6HP Tecumseh "Aluminum Block" and with careful parts selection, I had a push mower that was about 8-9HP with the front of the deck cut open so I could mow down 12" tall weedy yards (older people want to get most for their mower money - DR Trimmer wasn't invented YET!) - It was sort of my secret weapon, I normally used a "Lawn Boy" for the normally kept yards...Later bought a Deere Rider! - I had a Home Built "Mule" (Looked like a crappy Jeep) and a trailer later on...All before I was old enough for drivers license! - This thing would need a real cooling fan....BUT WOULD'VE PUT MY 9HP MOWER TO SHAME!

[@georgemason8521]

@@misters2837 I appreciate people that resurrect these these old machines. Have quite a collection here but never did any thing quite as impressive as this man has. On a good day I fix a mower I rescue and give to a friend or neighbor. This mans creativity and skill is something to admire.

[@cjhickspe1399]

As an owner of a Lycoming R680, that is a beautiful sound. That is impressive, sir.

[@Desmouffe]

Thank you. still working on it...

[@drsatan3231]

This seems like overkill and I approve

[@airfoilsinmotion4777]

Most of the world today won’t appreciate the critical thinking, creativity, skill and craftsmanship that goes into a project like this. It is truly a wonderful concept. Thanks so much for sharing it with us🎉

[@richardchambers256]

True, but he should be using it for something like a hovercraft or an airplane. But to cut grass? And probably rocks as well?

[@peterhinton7326]

That was awesome, looking forward to see the tuning results

[@Kalleballethetwo]

and the lawn

[@ColinWatters]

Great sound. Not only will it cut grass great, it will probably level the ground as well !

[@andybilakshow260]

my guess is it'll levitate within seconds. In fact, that levitation trick is the means to grass length of cut is determined.

[@jacobstep7153]

Even your fence!

[@gabrielv.4358]

Bhahaha

[@mikef.1000]

That sounds SUPERB!!

[@rieger.design]

WOW. the word awesome waited for something that would fully define it - and you just built it!

[@Desmouffe]

Thank you

[@rmxrider20032000]

I could imagine the neighbors would have to plug their ears if you had decided to mow with it. Love the engineering you put into the project. That was very entertaining to watch. Thanks for sharing.

[@dz1sfb]

That, though maybe not running cleanly is the badest lawnmower ever. Nothing but respect for your skills and this beautiful handmade creation.

[@Desmouffe]

Look at the "nightmower". I have made some adjustments.

[@dz1sfb]

@@Desmouffe Sounds great but not real visible as far as video quality goes. What are the long term plans for this engine?

[@Desmouffe]

@@dz1sfb No plans. Maybe I feel for some updates in the future but right now I dont know

[@TheLonelyCowboy1958]

Looks sweet! You could make a shroud that goes over the flywheel an over the top of the cylinders to give it a cooling system, kinda like a briggs motor

[@tonyelliott7734]

I'm glad I stumbled across your channel. Your work is amazing.

[@craigpennington1251]

This is absolutely WILD. Sounding great too.

[@billbates7810]

What a magnificent piece of engineering! Really enjoyed the video! God bless, Bill.

[@NihongoGuy]

These kind of builds just leave me speechless. I can see imagining such a creation, I'd never guess someone would build and run something like that. The world does need MORE radial engines...............

[@regs3836]

I would love to have one of those in my yard. Amazing sound.

[@knobsdialsandbuttons]

It sounds like a top fuel dragster. Awesome ! 👍

[@enginediy]

Good homemade radial engine

[@linleycovington5628]

That's about the coolest lawnmower I've ever seen lawnmower like that you wouldn't have to cut the grass everybody would be wanting to try it out

[@alexrcb4buggy]

if you get it running right id love to see it cutting grass lol, amazing work.

[@adhdaf]

shoo, forget cutting grass.. I wanna see this thing clearing brush and small trees lol

[@worshipingIAM]

i have a feeling that that engine is waaay more powerful than a lawn mower needs!

[@Desmouffe]

It is. But I have to put it somwere

[@huckleberryred472]

Makes an engine that is quite literally a work of art.............. Mounts it on push lawnmower

[@stevegarcia1796]

Frankenmower , 🤯 ITS ALIVE !!! Absolutely amazing you're a genius 🇺🇲👍🇺🇲

[@jaredallen1149]

Beautiful and amazing!!! I bet it will cut grass as fast as an airplane, too, when it runs correctly!!! That sound gives me chills. I love me some radial engine!

[@spyder000069]

That is a lot of fine craftsmanship and labor to not be selfpropelled and no cup holder.

[@simergr]

The kind of mower a retired f4u pilot would get for his home.

[@jolla9963]

They neighbours will know when you mow. One would hope they are rev heads and that your mower is music to their ears. I look forward to hearing it tuned and singing the song of its people.

[@martijnbaarn]

I would buy this type mower when commercially available without even a second of thinking . Its really the coolest thing ever to do the lawn with this.

[@111000100101001]

Absolutely beautiful machinery!

[@Thankz4sharing]

It runs! It runs! Bravo! You have earned the right to name the parts of your engine as you wish. Camshafts are used for inline engines. The American term for what you call "camshaft" is "cam ring" when referring to a radial engine, not that it really matters. No matter what it is called, two lobes rotating backwards at a quarter of the crankshaft speed is pretty amazing.

[@Desmouffe]

I guessed the word "camshaft" was not correct . It's an interesting thing. My first solution was as an normal 4 stroke engine. The camshaft rotates with the half speed of the crankshaft. Then suddenly a night in bed it hit me that it would be a "big bang" engine. I want the firing order 1, 3, 5, 2, 4. How do I make this happen. After some googling I found the solution. Fantastic engines. But if you are going to build your first petrol engine it not so smart to choose a radial.

[@blackbobross499]

cant wait for the next video

[@lukewilliams1188]

It would be an honour for this man to cut my grass. Well done. An engineering marvel!

[@Gkuljian]

Wow. I think I've seen everything now. What a work of art.

[@dogshome7110]

Possibly a little over specified for a lawn mower? Brilliant 🙂

[@shawndubay4050]

Damn that mower would cut hay. Great build.😮

[@SocketSlinger]

I bet that thing is a torque monster 😮. Ty awesome seeing this journey.

[@jdsstegman]

His neighbors must love it when he mows the lawn!! Nice work!

[@Desmouffe]

My neighbors are very understanding

[@crunchysuperman]

You're a madman - I love it!

[@BruselskySluzebnik]

This is how I imagine a king of the hills lawnmower looks like.

[@beeenn649]

That is one badass lawnmower.

[@thomaswaldorf9141]

Perfect for Sunday morning mowing to make Karin very happy 😂

[@hernandovillamarinbuenaven7476]

Amazing!!; (Just an MD aficionado). So many thanks for sharing your dedicated precision work!!.😊🙏

[@hellonwheelz3317]

That thing makes a glorious sound. You have done some outstanding work on this machine. I've subscribed and can't wait to see your next project.

[@Desmouffe]

Well, I'm not quite happy with it. It needs an exhaust system and I'm working on it right now.

[@whydahell3816]

Holy crap I'm very impressed!! That's the coolest mower ever!!

[@Dave5843-d9m]

A radial two stroke would be really awesome. One crank pin carries all four big ends. Air is fed via a hollow crankshaft. blower driven by belt gives slow running air supply At higher revs, the exhaust gives all the pumping you'll ever need.

[@Desmouffe]

Now that's a build I would like to see...

[@paulkurilecz4209]

Sounds really good for a first start.

[@judasone83]

That's one cool mower. Very nice sound in the motor

[@luke-thurston]

amazing, quality workmanship, lovely project. well done

[@gabrielv.4358]

That is way cool! SO nice

[@Desmouffe]

👍

[@jimdut795]

Absolutely amazing I look forward to your progress.

[@paulb7334]

I would love to hear that in person I bet it sounds awesome

[@mp-xt2rg]

Cool project. The placement of the hold down pad should probably be moved to the other side. You're going to end up sending your for into a spinning lawnmower blade.

[@dennis-nz5im]

I suspect it will have a spring loaded door for mulching and it will lift up for a bag.

[@mp-xt2rg]

@@dennis-nz5im aren't bag discharge shoots typically on the back? It looks like a side discharge to me.

[@dennis-nz5im]

@@mp-xt2rg are lawnmowers usually powered by 5 cylinder engines or radial design? I think it’s just a sniveling comment Karen

[@ThisTimeTheWorld]

I like to leave my starter rope off the little eye bolt on the bar so I can get a shove to the mower and pull back at the same time for another foot of pull

[@ThisTimeTheWorld]

​@@mp-xt2rg some 40s to 60s mowers had a side bag

[@bobod830_9]

Great sound. Would be cool to see it mowing tall grass.

[@dougtaylor7724]

I would be sitting on the porch every Saturday morning waiting for the neighbor to fire that baby up and mow his grass. That’s so cool!

[@eddiewebb1966]

It sounds like you have made a racing engine for the lawn mower. Very cool and sounds cool

[@vitezizsrednjebosne1596]

Tack...motala

[@Ben-Dixey]

Incredible job. 👍👍

[@David-dv6yv]

Much respect!

[@moviestudioland]

Sounds like a WW2 airplane running Well done.

[@gerrycooper56]

A thing of beauty.

[@jackstoyOgaugetrains]

Thank you for sharing your excellent skills. I wish I could do that. Beautiful.

[@camyota]

Your neighbors are gonna be pissed, I love it!!!

[@williamwarner3982]

Coolest lawnmower ever.

[@ОлегКоробкин-у7е]

Великолепная работа, нравится смотреть Вашу ракботу!

[@felixd7818]

What a great sound!

[@davidhamilton7628]

Love to see these go in to mass production

[@roadsidegarage69]

It would be so inefficient to build and maintain that there is no way anyone will mass produce it

[@waterlife.1905]

It could be done. It would be an expensive 1000 dollar mower and you would have to go through about 2 gallons every time you mow. Your neighborhood will either envy or hate you, and you won't have any troubles in the fall with leaf cleanup.

[@jimbob4456]

Love the sound man.

[@sgt.marcuspstacker2287]

Id be afraid it would take off in flight while im mowing my lawn lol thats actually pretty cool ive always wanted a small radial motor for a homemade motor bike or fanboat but man thats alot of messing around to make all that props to you man!

[@alistairshanks5099]

Your machining work is excellent and the mechanical design is very sound but the carburation and the inlet manifold will need some extra research I think as will engine cooling because obviously, this engine will not be flying to get cool. Overall your work is very impressive.

[@pierre-rose7783]

The thin line between genius and crazy !

[@Desmouffe]

I don't want to know where I am

[@dinosshed]

I love this! The sound is awesome and looks great.

[@3073Sean]

Very cool, nicely done!

[@cebedeuz]

Beautifull sound. Whish my neighbour would have this lawnmower.

[@jayh1947]

Excellent job. Congratulations..................Jay

[@Desmouffe]

Thank you

[@midsouthexpress]

That's cool!! It even has some of that radial lope to it. Maybe you can make some kind of blower housing for it to direct air over the cooling fins.

[@Desmouffe]

Putting it on a cutting deck was not a very good idea. But it's made out of old lawnmower parts, it has to lay down for lubrication so I tought, why not.

[@Fix_It_Again_Tony]

Looks awesome. Looking forward to see what you do about air/fuel delivery and exhaust. I bet a motorcycle carburetor would be a good fit here. I definitely think the exhaust tubes need to be longer. Their diameter and length have a big effect on how a naturally aspirated engine performs. I think there are some calculators on the internet for header primary length that would work here. I think with a shroud and a bigger impeller on the flywheel you could come up with a decent cooling solution. It's probably not going to be able to run at max load all day, but it'll be enough to cut a little grass. It would be a shame to cover up that engine though. It's a thing of beauty.

[@Desmouffe]

Yes, I am not very keen to hide it under a lot of sheet metal. It's a display piece. Just for fun. I will never cut any grass with it. It's to heavy...

[@DonTrishLayne]

Sounds awesome!

[@catsshadows]

Nailed it, i want it JUST to impress my friends.

[@shawnmrfixitlee6478]

What a wonderful Engine ! I sure enjoy your channel ..

[@JS-kd7jf]

You must HAVE SOME TOUGH GRASS WHERE YOUR AT ,TO NEED THAT BIG OF AN ENGINE!!!!!

[@wendellmcqueary8624]

I really don't think NEED is part of the equation . More like I can and want to do it. So why not? L.W.McQueary

[@Alexie3333]

Yes someone with a grat passion! And skill. Where we could learn form it! It gives me ideas

[@jvmiller1995]

I personally think you should ditch the mower body turn the motor horizontal and make a mini bike chopper out of it. I love it. You are a man with mad tallent.

[@Desmouffe]

The problem is lubrication. all the oil will end up in cylinder 3 and 4, and the oilpump will go dry. In that case it needs total rebuild.

[@jvmiller1995]

@@Desmouffe Could you not make a oil sump for it and pump the oil back up to the top. I mean either way my hat is off to you on this. I took machine tooling at vo- tech and it is not easy to do what you have done on manual machines. You should be very proud. Maybe you could leave it vertical and make a go-cart with a 90 gearbox. Or leave it a mower. It is your project but you really deserve a way to show it off. Thanks for the uploads I am so glad I found you.

[@Desmouffe]

@@jvmiller1995 Well, almost everything is possible. If you can find the inspiration and energy.

[@shadetreemechanicracing22]

I love your V8 tractor, but I think this one is awesome.

[@bevanwilson5642]

Wow thats really neat and its firt start went well. Love your madness

[@HobbyMotorDK]

Fantastic result - and super cool series 👍👍

[@Desmouffe]

Thank you sir

[@kennynelson2269]

I love this engine.. a little tuning a cooling system and its mint!!

[@vintagetintrader1062]

Looking at the air/fuel intake manifold , using thin and long steel/copper lines like that for mixed air/fuel, you could be getting fuel drop out (fuel going from atomised in air back to fuel droplets) It’s a common problem when you have a long intake runners like that I’ve encountered in custom builds. See if the manifold is very cold to the touch near the cylinder.

[@Desmouffe]

It's copper pipes and if I was going to use one carburetor this is the shortest way to go. They are very thin, only 15mm but I wanted to keep up the speed of the mixture to avoid what you have described. The alternative is five separate carburetors with syncronizing problems and throttle control.

[@huzudra]

@@Desmouffe I think you could get 5 carb sync'd, I did 4 on a motorcycle pretty easily with much less experience. Your current intake pipe could be used as a frame for the cables to run up to a central pull plate with a single cable and cam in the center. Perhaps an automatic speed governor would be a nice implementation if you plan to mow lawn with this, automatic throttle relative to load is nice.

[@Desmouffe]

@@huzudra Interesting thoughts

[@ThisTimeTheWorld]

​@@Desmouffe a bmx bike hinged clamp brake lever can serve well as a 1 finger throttle lever

[@ThisTimeTheWorld]

​@@Desmouffe I'd make it a stepped size manifold (small to bigger to small again for a velocity stack effect , or add small dimples for turbulence/swirling.

[@apex107lrp]

Bravo, sir...BRAVO!👍

[@aprules2]

I'd love to buy one.

[@noapologizes2018]

A five cylinder radial engine lawn mower. Now, that would sell out all day long just for the cool factor. And if you decide to, it could be mounted on an ultralite aircraft. How awesome would that look. I must say however, no points for mounting it on a push mower body.

[@Desmouffe]

This is my first petrol engine and it's not very smart to choose a radial engine as a first build. But never the less, the reason for letting it lay down is the lubrication system. I have a wet sump system so it has to lay down.

[@ChainsawChuckSmallwood]

Beautiful work Sir!

[@Desmouffe]

Thank you

[@BaldSasquatch]

the sound from your engine is EPIC! Fantastic engine!!! I worry about the carb and intake system, in my tinkering experience, most of the lawn equipment carburetors need intake pulses to operate correctly. They are tuned for a 1 or 2 cylinder engine with very strong intake vacuum pulses. I wonder if you would be better with a very small automotive carb (early VW aircooled, or small >1.0 liter 3-4 cylinder car), or 5 small lawn equipment carbs, one on top of each cylinder.

[@Desmouffe]

Yes, this engine has a lot of compromises. Work goes on

[@BaldSasquatch]

@@Desmouffe that's the best part about hobbies! And credit where credit is due, IT RUNS and it looks awesome! Very impressive workmanship!

[@Kidd-nq4fg]

Maybe a prop type fan for cooling on top? I’d imagine it doesn’t get enough cooling with that basic blower type fan on top.

[@rogerlabarr8578]

AMAZING ART!

[@willemm]

Sounds like an old airplane - I think I could even see flames coming out of the little exhausts

[@Desmouffe]

Yes, it is quite cool to start it in the evening

[@JohnSmith-yv6eq]

Do you have a disc or bar blade attached during these runs? If not the rotating weight of a cutter bar might help smooth things out a bit? Will you have an enclosed cooling fan for the engine...otherwise, like a good old Briggs and Stratton run minus cowl...things will get very hot? Might have to go to a vertical pull start (meshing with a ring on the flywheel.... also like an older model B&S) with a 90 degree pull out the side (through the cowl?) and use the "top" end of the crankshaft to drive a cooling fan.... Did you check the temperature of the carb and intake runners to the cylinders? If run for a time these units will both cool down with the evaporating fuel/air rushing through them... VW aircooled engines get up to 6mm ice formed if the exhaust heat is not run under the runners...or the carb intake, like on an airplane...is not heated. I enjoyed watching and listening....thank you.

[@Desmouffe]

I know the cooling is not enough but I only run it short times. Don't want to hide the engine under a lot of sheet metal. Under I have a bar blade with a 500g weight on each end. It was impossible to start without. Earlier I had a 10kg flywheel under but this will give the same effect.

[@JohnSmith-yv6eq]

@@Desmouffe Yes a lot of people take the blade/disc off their lawnmower when draining the oil...then put new oil in and try the engine out...without the blade or disc installed..and wonder why that doesn't work... I know you don't want to hide too much..what about a clear acrylic plastic cowl so you can still see everything? Thanks for replying and good luck with this and your other projects. I suppose you have seen the YT of the "Franz Flyer" 392cc V8 motorcycle...also "made at home by a man in his shed"?

[@Desmouffe]

@@JohnSmith-yv6eq I just looked at it. Really nice build and fantastic finish. Beautiful

[@aSpyIntheHaus]

Oh I have been eagerly waiting on this update!!

[@JJ-si4qh]

I'd like to see one where the engine block spins with the blade like some old prop planes

[@aSpyIntheHaus]

That is wonderful!!

[@Felix-fy7ki]

Nice work, sir!

[@Desmouffe]

Thank you