contra rotating propellers (No. 1) in ENYA60X

★ Vol-2 Structure edition → • Contra rotating propel...
☆ Click here for Unit 2 → • Contra rotating propel...
☆ (New work) Click here for the new No. 3 machine → • Contra rotating Propel...
★　What is Contra?♪♪ In modern civilized society, electric models are rapidly evolving, but there are no engine-powered Contras in model airplanes. Regardless of the trends of the times, as an ``engine geek?'' I feel lonely. The idea is to make the propeller fly at 10,000 revolutions, so it's a lot of trouble, but I have no choice but to try making it myself (^^;.

[@michaelneuharth9716]

That has got to be the coolest RC propeller setup I've seen thus far! I've never seen someone successfully design and build a working setup like yours! Congratulations! Job well done! 👏

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@neilbarclay7070]

Pretty sure there's some f3a pilots and contra rotating prop manufacturers that disagree with you.

[@rperry70]

@@neilbarclay7070 It is one thing with motors. Completely different with a single engine. Although, I do not know how practical this would actually be.

[@tonywilson4713]

Aerospace engineer here: I have no idea how or why KZbin recommended your video BUT I AM VERY HAPPY IT DID. That is beautiful engineering.

[@ken23p]

Thank you for your comment. It's very encouraging.

[@tonywilson4713]

@@ken23p No Probs. If you can - When you get time do a series on how you made it.

[@crenneker]

In 1986 I built one of these for a Mechanical Design course for my MSME at Stanford University. I failed to properly calculate the pulsing loads from the engine firing and undersized the drive belt by a factor of 3. It started and ran - for a few minutes. I got an "A" and a fun memento for my workshop. Yours looks like a proper sizing job. Congratulations.

[@ken23p]

Thank you for your comment. Well, the load calculations were unpredictable.Currently, the belt size has been reduced by 30%, but we are still trying to reduce it.

[@paradiselost9946]

LOL! i had the funky idea of mounting a diesel engine and belt driven genset to my cheap backhoes. of course, it then got an overcenter clutch for the hydraulic pump, so i could disengage that... after the third belt, i checked a calculator, it said i needed FIVE BELTS! so the pumps went back to direct drive. it was at this point that i realised an e-clutch from a mower was perfect... except i had hacked that vital 1 inch off the crankshaft to mount one... should have clicked sooner, as the genset has an e-clutch... the genset? its fine on a pair of V belts. larger diameter pulleys, etc... sigh. i hate hindsight!

[@gwallmeyertonneks1042]

Super great idea and job!! But please take the music out of the video. We want to hear the original sound of all the machines.

[@ken23p]

Thank you for your comment. Well, this research has just begun, so I'll take this into consideration from now on. Thank you for your advice.

[@MauricesExoticPets]

You have made an incredible contra-rotating propeller system. Congratulations! Be safe, i want to see more cool things from you for a long time.

[@ken23p]

Thanks for your comment. This is encouraging, so please look forward to it.😄

[@darrinbunston5932]

If you're that good of a machinist and able to make a counter rotating system like that I'd like to see you make your own engines After all they're not that complicated there's only a few moving parts and they're a sleeve valve engine which is interesting to me anyway

[@UCs6ktlulE5BEeb3vBBOu6DQ]

I hate people saying to stay safe but in this case it is indeed required lol

[@ken23p]

@@darrinbunston5932 Thank you for your comment. Well, a lot of people are actually building engines, but they can't compete with the manufacturers. What I'm aiming for is to achieve something that engine manufacturers can't do, and I don't think a company can do it at the moment due to the production costs, and even if it were possible, it wouldn't be profitable unless they produced a huge number of them. No, and I doubt how many enthusiasts will need this.😅

[@loicpoupel4081]

Ce serait intéressant de le voir monter sur un avion et le voir voler.

[@raylawrence1]

Some impressive design and engineering. To achieve vibration-free running with all that overhanging contra-rotating shaft is a measure of this fine work. Beautifully executed !

[@sideshowbob5237]

That's what got my attention when I realised how it went together: the overhang. A masterclass in machining really. I note the last surviving Enya brother is Ken Enya. Could ken23p be Ken Enya? I hope so, marvellous engines. I only use Enya engines myself - most bought direct from the man himself.

[@jackychan6190]

Great engineering work and precision machining with highly skillful workmanship combined with great Japanese Made great engine, the engine also famous for its reliable and long life working. On about 1977 in Hong Kong, I have an Enya 60X modified to water cooled for sport cruiser, then converted to rear intake side exhaust for speed boat and give plenty year of modelling pleasure.

[@ken23p]

Thank you for your comment. We are still testing it and there is some power loss, so we have not reached its full potential, so we will continue to do various things. Please enjoy a good radio control life.

[@ken23p]

Thank you for your comment, it's encouraging.

[@田中あうい]

世の中には隠れたすごい人がたくさんいるんだなと思い知らされますね

[@ken23p]

コメントありがとうございます、励みになります。😄

[@sammoore9120]

I had an Enya .15 some time around 1975, started easily easy to adjust but weaker than cat pee. I also had an old Fox .15 that once I found the proper needle position started easily and ran fantastic. Then I bought a Cox conquest .15. Started easily ran like a demon. That engine was rated to produce almost 2 hp. It screamed.

[@hopelessnerd6677]

I used to have an ENYA. Nice motors. Nice work! I wanted to hear it run without the music.

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@GreggRoberts]

"Counter rotating" -This video is AWESOME. Nicely done!

[@ken23p]

Thank you for your comment. It's encouraging.😄

[@rsz90182]

I remember the Enya engines when bought my first OS SF 61 and FP 45. My brother bought the OS SF 45 which was already broken in and we were shocked that it performed really well. Those were the good old days.

[@ken23p]

Thank you for your comment. Well, the engine I bought with my first salary after becoming a working adult was the OS29R.😁

[@sobeit1927]

I had an “enya 19 “ over 50 years ago . It used to really scare me and made my finger very sore .

[@ken23p]

@@sobeit1927 In the past, there were no electric starters, so starting the engine was difficult.😅

[@paradiselost9946]

@@sobeit1927 one has to learn to "bounce off compression"... watch an old girl being started, like a gnome radial... the smart guys actually flick them BACKWARDS. use the kickback to get them running. they'll give you more than a sore finger if you get it wrong!

[@joseenriquetomasperez3912]

@@sobeit1927 , 1st rule: do not over-prime the engine....😉......being difficult in a 0.19 cu

[@williamgalbraith3621]

Very fine design and workmanship! Congratulations, it's beautiful!

[@ken23p]

Thank you for your comment. It's encouraging.😄

[@davidaustin2172]

Excellent job! Cannot believe how smoothly it ticks over at low revs!

[@ken23p]

Thank you for your comment, encouraging.😄

[@Watson1]

Filming a running aircraft engine with all the trip hazards and you with flip flops on not good. But an amazing job, congratulations on your success. Drop the music, let us hear it running.👍🏻👍🏻👍🏻

[@klassyedward9718]

This is a great video of happy fabrication resulting in very happy outcome!

[@ken23p]

Thanks for your comment. It's true, it's not a fabrication, it's the real thing.😅

[@captainaxle438]

They made the exact same engine externally in an .80 size which would give you more power. My only criticism is running that thing in your face. Safety requires we stand behind the propellers even on regular single-propeller model airplane engines

[@ken23p]

Thank you for your comment. Well, I've had a propeller come flying at me a few times in the past.😅

[@johndd8186]

music drives me crazy!!

[@kittyhawk9886]

This is what the current F3A world needs! Not batteries and BECs.. great work!

[@ken23p]

Thank you for your comment. We are conducting daily experiments to put it into practical use, so please look forward to it.

[@brennersharp9111]

An Enya 60 doesn't produce enough power for f3a. Also, weight is always an issue. For f3a you need a system that will generate 3500W plus, and weigh no more than 1.85 kg including spinners, props, and mounting system...

[@ken23p]

If you want to quickly win a competition, I think it would be better to purchase the "electric contra rotating" system currently available on the market.

[@日月俊]

ヘリ用の二重反転システムは試作段階まで作ったが、実機乗せまでは資金が足りなくて断念した（傘歯をデフギアみたく組んだもの）完成させるのは素晴らしい事ですね

[@ken23p]

コメントありがとうございます。資金不足とはいえ、実機乗せまで考慮とはすごい事です。自前はまだ模型でさえ実飛行に至っておりません。毎日の様に問題を少しずつ解析してますが先は長そうです、応援感謝致します。

[@claudedulieu8942]

Hello Sir, Congratulations for your helicopter work ...! (..OK no finish but a moment ..)

[@mapquest681]

This Gentleman is a Master craftsman and a master machinist. I love watching masters build things like this for no other reason than personal satisfaction and (probably) someone told them it is "Impossible". Well done sir!

[@ken23p]

Thank you for your comment. It's not perfect yet, but it will serve as a starting point for my next work.😄

[@mapquest681]

@ken23p Sir your "perfect" and mine are two different things! If there was an award given for excellent machine work your machining on the spinner alone would be Oscar worthy. When you put the pieces together on the front and back halves, you can't even see the seam. Really world class work! What surprised me the most was the fact that you got the Enya .60 to spin both of those big props. I take it that you built a gear reduction drive as well? I know Byron Originals used to sell something similar back in the 1980s so that a .60 2 stroke could spin a much larger prop...Single prop obviously...

[@ken23p]

@@mapquest681 Thank you for your praise. I have been building products based on my own experience and intuition, and I didn't know that Byron Originals was producing and selling a similar system. I'd really like to see it, and I'll be publishing the structure of the system soon, so I hope it's helpful.😄

[@justincase5272]

I might of done it with planetary gears, but your solution is indeed unique!

[@ken23p]

Thank you for your comment. I thought about planetary gears, but gave up because the bearings and shafts that support a system that rotates over 10,000 revolutions would be too exaggerated in a model engine.😅

[@txflyguy0076]

A work of art, absolutely beautiful.

[@ken23p]

Thank you for your comment, it's encouraging.

[@loddude5706]

Nice job; love the 'safety slippers'! : )

[@ken23p]

Thank you for your comment. Well, it can be quite dangerous, right?

[@MrSteeleye]

Sadly nothing was shown on the making of the rear reversing gearing, but a fantastic achievement

[@ken23p]

Thank you for your comment. I simply replaced the starter receiver for the helicopter engine with a gear.

[@michaeljones1664]

@@ken23pSo, the rear belt is driving a gear connected to the inner shaft that drives the front prop. Am I understanding that correctly?

[@ken23p]

@@michaeljones1664 Yes, the gear from the crankshaft to the belt is 30% faster but slowed down by the front pulley.

[@BD-qq4fn]

Absolutely beautiful work! Somewhere there is a modeler building a Tu-95 looking for your engine.

[@ken23p]

Thanks for your comment. We have to make three more units, which is a hassle.😅

[@matsgustavsson665]

How about a Fairey Gannet then? 😀

[@ken23p]

@@matsgustavsson665 Well, with the Fairey Gannet, you have to use a turboprop engine.😅

[@matsgustavsson665]

And you wouldn't with a Tu-95 ? 😀 Well, there is always Avro Shackleton...

[@ken23p]

@@matsgustavsson665 TU-95 is difficult because I have to make 4 sets.😅

[@LIOTBs]

There are just some incredibly skilled and brilliant people in this world!

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@jamesmina3272]

My feelings exactly. Well-spoken!

[@sobeit1927]

Lovely piece of work . Thanks for showing

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@Xplanker]

Incredible workmanship. Are you going to put it in an airframe? Great job

[@AngelDriver7]

Very impressive. How about an estimated thrust output for this engine? Can you also provide an estimate for a much larger engine? Could certainly be beneficial to the industry if so.

[@shaquedelilicss7849]

Great job! ... I had a similar idea for some time.. With use of 3 engines.. 2 Enya engines and an electrical propulsion in the back for support, start and generator. Use 2 Enya diesel engines in a flat 2 configurations, similar to a boxer engine, Only with 2 crankshafts mated together with gears in the back. One of the Enya engines housing has to be turned around to so that both exhausts face up. And one of the engine has to spin opposite direction. Both of the engines then drive a propeller with a pully and a belt.

[@ken23p]

Thank you for your comment. Let's make your great ideas come true!

[@hughacosta1090]

Outstanding craftsmanship.

[@ken23p]

Thank you for your comment, it's encouraging.

[@jojo-lk7bc]

Congratulations! But I wonder if there isn't a simpler solution for cooling family jewels? Enjoy research work and be safe! Btw, i came here from my wind turbines info inquiry and have the question: Was that sistem been checked at wind turbines already?

[@jeromelapierre9733]

Un énorme travail d'ingénierie, du top niveau que je ne pensais jamais voir un jour ! BRAVO MONSIEUR. Serait il envisageable un jour de voir vos moteurs sur l'avion "Bear"

[@ken23p]

Merci pour votre commentaire. C'est encourageant.😄

[@bobvanderveen3528]

Slick setup, hope you’ve had all the kids you’re planning on. I sure wouldn’t point that at my junk!

[@ken23p]

Thank you for your comment. I will use it as a reference later.😁

[@jackx4311]

I really wanted to hear the engine running at full power . . . and all I got was damn *MUZAK!!*

[@ken23p]

Thank you for your comment. The current output is about 70%, and the sound of the highest output is the one you hear when you hit the tachometer in the video while driving.

[@paradiselost9946]

the REAL test is to mount it to a pivoting mount and demonstrate that whilst contra-rotating does eliminate the helical airstream, and the gyroscopic forces, it actually INCREASES the torque reaction on the engine...

[@ken23p]

Thank you for your comment. Yes, that would be ideal, but since this system was an experimental operation, we discovered some unexpected problems, such as too much overall resistance, so we are already in the process of designing the next system. I would like to provide a numerical answer once the original ideal power has stabilized, so please look forward to it.😁

[@sky173]

Beautiful work. Thank you for sharing.

[@ken23p]

Thank you for your comment.

[@williampollock1274]

Cool! So what are you going to put it in?😁

[@tonybranton]

I know you call yourself being safe, I am a machinist too and have made many notable devices in my 40 years doing so BUT, Your safety adjustment needs some attention! The best of us can slip or at our age, have a nerve twitch that can cost you more than a missing finger!

[@Своимируками-т5ю]

Прекрасная работа.

[@FlyNineVictor]

Really nice engineering and machining! Beautiful work. Would love to see it in a scale model flying.

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@andymunnings9109]

"You worked hard on this innovation. Good job."

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@XRakkgruntX]

What is the reason these are not on gyrocopter? It seems like very little weight to add for such an increase in thrust, it would also neutralize prop torque. Is there a reason?

[@garyhooper1820]

A world apart from the Cox 049 engine I had as boy !

[@mylesjarvis7571]

Incredible engineering and machining here. Excellent!

[@ken23p]

Thank you for your comment, it will encourage me next time.😄

[@MyZxcvb12]

Great work. How does it work power to weight ratio?

[@mekatuti]

やっぱり二重反転は浪漫。 最高です…✨

[@ken23p]

コメントありがとうございます。模型用としては課題の多い作品ですが励みになります。

[@frandre_s]

実用面を考えると重量増加分に見合う推力が出るかが問題ですね

[@billclark5943]

Nice workmanship

[@ken23p]

Thank you for your comment.(^^)

[@guyguybohurst3304]

This is a fun and interesting setup. However I have to ask. How practical is it? When if ever will we see it installed In and actually powering an actual RC Aircraft in flight? Or is this just going to be another interesting model engine that just sits on permanently display on a shelf and never actually sees flight?

[@ken23p]

Thank you for your comment. Well, of course it was created for practical use. However, the resistance of the system is greater than expected at the time of design, and currently only about 70% of the output catalog data has been confirmed.Furthermore, the overall weight is heavy, which will be a big problem if it is actually put on an airplane.However, It is currently being improved little by little. If we don't reach our expectations in the future, we may build a different system, but we're already in the next design stage.😅

[@douro20]

Heard of a lot of Swiss machine makers but not Wahli Freres. Apparently they mainly made grinding machines.

[@ken23p]

Thank you for your comment. This multi-purpose machine tool is no longer in production. In recent years, it seems that they have been producing small thread cutting machines, hobbing machines.

[@NikolayAtanasov-c1v]

Второто витло увеличава мощността, но само ако се върти с по-висока скорост😊

[@MYSTEREFLYER]

Très ingénieux et bien réalisé, bravo !

[@ken23p]

thank you. I'm happy.😄

[@scottyreeves8179]

That's EXACTLY what I was thinking ! You have sandals on, that slippery floor ??!!! That close to ?? Just like Pink Floyd says,, "one slip and down the hole we fall"... Great craftsmanship !! But BE CAREFUL !!!

[@samuledarconi2927]

Trying to wrap my head around how this works. The pulley drives the back prop, but how is the front prop driven?

[@planker]

Excellent. If you want to go fast, get an Enya. Super Cool.

[@ken23p]

Thank you for your comment, I will take it into consideration. 😀

[@keithnoneya]

Terjemahan Google. Saiki sampeyan kudu mbangun telu liyane lan Howard Hughes XF-11 kanggo dipasang ing. Proyek sing apik, seneng. Sugeng Rahayu lan Rahayu. Keith Now you need to build three more and a Howard Hughes - The XF-11 to put them on. Nice job loved it. Best Wishes and Blessings. Keith

[@ken23p]

Matur nuwun kanggo komentar sampeyan. Kita rencana bakal terus nyoba macem-macem perkara, mula seneng.😄

[@ewingtaylor5487]

Question - Just why / how does the belt-driven prop turn in the opposite direction from the prop attached directly to the crank shaft? A mechanical illustration or interior parts assembly photo would be nice.

[@ken23p]

Thank you for your comment. The belt-driven propeller is rotated in reverse by two gears inside a box taken out from the crankshaft at the rear of the engine. We are currently making operational adjustments and parts machining to improve performance.The next video, "Version 2," will be released in due course, so please enjoy it.😁

[@ahmedalshalchi]

Excellent ... Excellent .... This is is called MECHANICAL ENGGINEERING ( ME ) , not the crap MEs are doing todays ... One bad thing in this incredible job is Safety Measures !...

[@ken23p]

Thank you for your comment, I will use it for future reference.😅

[@SkipAd-y2r]

So piston drives the front propeller and the belt drives the rear propeller? so simple ...😊😊

[@ken23p]

Thank you for your comment. That's right, it's simple, but the belt has a little more resistance.😅

[@kalvinnoble488]

Awsome design for a contra-rotating propeller system! In one of your comment replies, uou stated that it was suffering power loss. Have you taken into account that you're using the equivalent of a 4-blade propeller? Taking that into account, you might need to change the prop diameter and the prop pitch to get the equivalent power of a 2-blade prop.

[@ken23p]

Thank you for your comment. It's very helpful.

[@kalvinnoble488]

@ken23p That may help with your power loss. All I can remember when switching to a 3-bladed prop fromna 2-bladed prop, keeping the pitch the same, you reduced the prop length by aprox. 1". I just couldn't remember the formula in how it's done. You might need to Google that. I do believe it keeps the rpms the same. You'll have yo check for that as well. It's been awhile since I looked at that formula and how it worked. Do some of the rc hobby aircraft engine manufacturers make counter-rotating engines?

[@aeromodelos1]

but the magic, is at the rear side side of engine, is where contrarotating system is, show this in next videos please

[@ken23p]

Thank you for your comment. Next time I'll publish it.😅

[@RcAircraft]

Fantastic workmanship. And excellent engineering skills too 🤯

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@Nigel2Zoom]

Is the second petrol tank for methanol injection? Your design is amazing!

[@ken23p]

Thank you for your comment. The first tank is for oil to lubricate gears and bearings, and the top is for fuel alcohol.

[@shribalajimachineryrohtakr5562]

Very nice bro 👍 congratulations ❤️ from india 🙏🙏

[@ken23p]

Thank you for your comment, it's encouraging.

[@twickersruss]

Very nice engineerinh well done . Is there a Bugatti racing plane waiting for it?

[@ken23p]

Thank you for your comment, it's encouraging.

[@АндрейВолжский-ы4я]

You did not show the gearbox itself, which converts left rotation of the crankshaft into right rotation. It is clear that it is located at the rear of the engine, the principle by which it is implemented is not shown in the video, although it is the main element of this design.

[@ken23p]

Thank you for your comment. Well, it's not a big deal, so I didn't intend to hide it too much, but I'm currently rebuilding it to make each part lighter, but there are many viewers who want to know more about the structure, so I'll explain the structure in the future. I'll show you.

[@mbahcarrier1629]

Perfect Work!!!! Seeing your video, I feel amazed and thank you for sharing this video and success always "Ken ......."....Pekalongan, Central Java, Indonesia

[@ken23p]

Thank you for your comment. It will be an encouragement for the future.😄

[@mbahcarrier1629]

Keep working, stay enthusiastic

[@pablosuarez4592]

MAGNIFICENT ❤

[@unaeruditi]

Excellent work Whatcha gonna put it in? Hawker Harrier or a P-51

[@ken23p]

Thanks for your comment. Well, I'll think about it now. 😁

[@oldtimer2192]

I wouldn’t be sitting in front of any engine like that! Test bed “looked” secure but…

[@Barty.Crowell]

Amazing build! What was in that first tank you filled up on the test stand?

[@ken23p]

Thanks for your comment. Lubricating oil diluted with fuel.

[@LichaelMewis]

Whats the purpose of that belt driven counter shaft below?

[@ken23p]

Thank you for your comment. Due to the structure of the original engine, the front reverse rotation power is extracted from the crank at the rear of the engine using a countershaft.

[@LichaelMewis]

​@@ken23poh ok I didn't realize the second propeller was spinning counter to the original. Also I would have liked to seen how you setup the rear of the engine. I don't think you showed that in the video. Any way good work making all of those parts yourself. I wish I had those skills and equipment.

[@ken23p]

@@LichaelMewis Thank you for understanding. We are currently rebuilding each part to make the system lighter, and I hope to be able to introduce its structure in detail sometime soon.

[@CraigC-j3n]

Loved it but I sure would have liked to hear the engine once you started it.. the music is too loud. Beautiful to see though.... that must have been fun. I'd love to put that in a plane.

[@ken23p]

Thank you for your comment, it's encouraging.😁

[@VVIO660]

素晴らしい工作精度。

[@ken23p]

Thank you for your comment, it's encouraging.

[@ya-to4718]

二重反転のプロペラ😮

[@andreasmuller241]

Klasse Arbeit, aber was wiegt das Ganze?

[@czkarting]

Nicely made! Good job!👌

[@ken23p]

Thank you for your comment, it's very encouraging.

[@agpereirav]

Very nicely done, excellent craftsmanship

[@ken23p]

Thank you for your comment. It's encouraging.😄

[@backpages1]

Great machine work and project! What are you going to put it on?

[@ken23p]

Thanks for the comment, I haven't thought about it yet.😅

[@RayRusawcocktailminer]

wow that is a lot of prop for a 60 but it swings it cool dude really cool

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@marknuetzmann4935]

Looks EXTREMELY heavy. Is this intended to be a practical solution or just a really neat example?

[@ken23p]

Thank you for your comment.Of course, we are reviewing the production of each part to make it lighter for practical use.

[@johntenhave1]

Lovely work, but a terribly dangerous place to sit were something to go wrong..

[@ken23p]

Thanks for your comment. It's noisy when you run it outside, and the work area is small.

[@DinocrocutaGigantea]

That's a beautiful engine

[@ken23p]

Thank you for your comment, it's encouraging.😄

[@valentinloginoff]

Nice work! Next step is make a pitching mechanism for prop blades.

[@ken23p]

Thank you for your comment, I'll do my best!😄

[@valentinloginoff]

@@ken23p I have one question please, do you measured the thrust on that configuration, and with single prop?

[@ken23p]

@@valentinloginoff It is possible to achieve almost the expected rotation speed (10.000rpm) with a single propeller, but it seems that there is a lot of rotational resistance because it is coaxial.

[@happyhome41]

Well done ! How fun ! Now to see it installed and flying / boating / whatever -- moving.

[@ken23p]

Thank you for your comment. We are currently experimenting with it, but please look forward to its completion.😄

[@RedneckSpaceman]

Too Cool for School!!! So, it's got a Glow Plug. I assume the Fuel has Some kind of oil mixed in? Essentially it's a 2 stroke Diesel, right?? Fuel is ignited via high compression! Just like those Cox & Testors micro engines from the 60s & 70s!! Way back in 1971, Testors, STP snd Coca-Cola were giving away Indy Style Cars with Glow Engines. All you had to do was send in a coupon from the bottom of a 6 pack Bottle holder for a chance to get one! I actually grabbed about 6 or 7 from a Trash Can in a park! I sent them in, separately of course....and I actually got one!! I already had a Cox 57 Chevy, so had the Battery & Glow Fuel!! It was a bit difficult, but I finally got it to start and run!!!

[@rperry70]

It would be very interesting to see this fly.

[@ken23p]

Thank you for your comment, please look forward to it.😄

[@philipsolaris3018]

Beautiful work. Would you consider selling this or constructing another for sale?

[@ken23p]

Thank you for your comment. I am making small improvements and testing it every day, and I would like to consider selling it if I am satisfied with it.

[@ferrybaqdiono4088]

Good idea make contra rotating to eliminate torque, in other hand...how much additional weight and take space...do you try to install on plane model....congratulation

[@ken23p]

Thanks for your comment. Compared to a real airplane, the weight increase of the system and the engine resistance loss are quite large, so research and experiments must be continued with these factors in mind. If you want to use counter-rotation quickly, it would be best to purchase a commercially available motor-driven type.😅

[@michaelkleist9482]

Anywone able to calculate parasitic power loose on thrust..??

[@ken23p]

Thank you for your comment。 catalog data maximum 1.6 horsepower. Currently the output is 70%, but this will vary depending on the propeller size.

[@PiDsPagePrototypes]

Would that gearbox set up work in an Electric Pusher configuration? Were the Belts difficult to source?

[@ken23p]

Thank you for your comment. I believe that if you design according to the output data of the target airplane's motor, you will definitely find something that fits.

[@justtim9767]

Super neat.

[@richardjohnson8009]

Is the prop spinning the opposite direction better than if they were both spinning the same direction just offset?

[@ken23p]

Thank you for your comment. The effectiveness of counterrotation is greatly reflected in flight conditions by counteracting gyroscopic precession effects. It has also been demonstrated that it eliminates air resistance and provides stable thrust.😁

[@richardjohnson8009]

cool!@@ken23p

[@ken23p]

@@richardjohnson8009 Thanks for your comment 😄

[@albertoocon9351]

Excelente la habilidad del Maestro

[@ken23p]

Gracias por tu comentario, es alentador.😄

[@WayneCook306]

Nice Job Ken.👍👍👍👍👍👍👍

[@ken23p]

Thank you, that's encouraging.😄

[@douro20]

What is the smaller tank for? Lubricating oil for the gearbox?

[@ken23p]

Thank you for your comment. This is an oil tank to properly lubricate the gear box and bearings on opposite shafts. The lubricating oil mixed in the fuel cannot be circulated alone.

[@NeroontheGoon]

First big model aircraft engine I owned, I put it on a control line Voodoo combat plane. Like to make my right arm about five inches longer!

[@rossofiorano5129]

Would be awesome to see a static pull test single prop vs contra prop same engine

[@ken23p]

Thank you for your comment, I will take it into consideration.😀

[@rossofiorano5129]

@ken23p fantastic job on all the machining and work BTW, looks great. Forgot to mention that. Will you put it on a model airplane? Would be weird to fly an rc plane with no P factor

[@ken23p]

@@rossofiorano5129 This is a system that conducts research and experiments to get on an airplane from the beginning. Originally, we started to eliminate the gyroopri session effect of the control line.