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.

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

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

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

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

コメントありがとうございます、励みになります。😄

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.

Thank you for your comment, it's encouraging.

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.

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.

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!

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

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

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

@@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.😅

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

Thank you for your comment, encouraging.😄

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

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

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

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

@@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!

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

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。

Thank you for your comment, it's encouraging.

Thank you for your comment.

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

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...

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.

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

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.

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

@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...

@@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.😄

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

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

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

Thank you for your comment, it's encouraging.

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

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.😅

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

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

Thank you for your comment. I will strive to do even better work.

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

Thank you for your comment, it's encouraging.

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

Obrigado pelo seu comentário, é encorajador.😄

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

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

Thank you for your comment. In the second half of the video, the engine is running. It's a little hard to understand, but please turn up the volume and enjoy.

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

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。

Thank you for your comment. 😄

Thanks for your comment. Lubricating oil diluted with fuel.

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.😁

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

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

@@ken23p I am trying to get prototypes manufactured for some of my designs. I'm currently separated from most of my tools. Do you do any model car designs as well?

@@NeriEngineering-oq6vh Thank you for your comment, please complete the model car. I've only driven cars in slot racing cars a long time ago, but model cars look interesting so I'm interested.😅

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

My feelings exactly. Well-spoken!

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

How about a Fairey Gannet then? 😀

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

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

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

Thank you for your comment, I will take it into account.😄

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

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

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

Thank you for your comment. It's encouraging.

Thank you for your comment, it's encouraging.

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.

コメントありがとうございます。全体のシステム小さくするため30％増速、プロペラシャフトで30％減速、±0です。後部ギァ、ベアリング類潤滑グリスでは抵抗過多、油膜切防止で燃料で薄めたオイルを少量流しています。

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.

thank you. I'm happy.😄

Thank you for your comment. The explanation regarding the performance etc. of the contra rotating prop will be long, so please check the explanation site. Please note that we are currently researching the system used in this video, so we are unable to provide detailed information at this time.😅

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

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

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.😅

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.😁

Vielen Dank für Ihren Kommentar, er ist ermutigend.😄

thank you😄

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

Thanks for your comment.

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

Thank you for your comment, it's encouraging.

Thank you for your comment. Well, in order to put it on a light aircraft, we need to make the entire engine unit lighter and the rotation speed is a little insufficient, so we are experimenting with making various parts and fixing them.

Thank you for your comment. It's encouraging, and I hope you'll make something good too.😄

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.😁

cool!@@ken23p

@@richardjohnson8009 Thanks for your comment 😄

Thanks for your comment.😄

Thank you for your comment.😄

thank you. It's encouraging.😄

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

Keep working, stay enthusiastic

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

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

Merci pour votre commentaire. C'est encourageant.😄

Thank you for your comment. The rear belt transmits power from the gear box to the shaft under the engine.

Thank you for your comment. The tachometer sensor was wrong so I just replaced it.😅

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.

Gracias por tu comentario, es alentador.😄

Thanks for your comment.😄

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

obrigado.

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

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

thank you. It's encouraging.😄

Thank you for your comment. I am going to use it as an example.

That depends a lot on the digital display, that swinging needle can also be misleading because being a mechanical system it has it's own resonance.

Maybe it's because of the translation, but I can't really understand what the needle is. 😶

Thank you for your comment. The advantages of reversing propellers are introduced in many other "contra rotating propellers" articles, so please refer to them. Thank you.

Torque effects are negated

This is CONTRA ROTATING propellers, not counter rotating.

Okay good point, so what is the difference between contra rotating and counter rotating props?

@@chrisgibby9241 Contra rotating propellers means two propellers on the same engine spinning in opposite directions through the use of a gear box, as seen here. Counter rotating propellers means two propellers on different engines, one per engine, spinning in opposite directions.

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

@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

@@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.

Thank you for your comment. Nitromethane 18 % alcohol fuel.

Thank you for your comment, it's encouraging.

Thanks for your comment, yes it's a 2 stroke engine.

Thank you for your comment. It's a wonderful airplane, and one of my favorites.😄

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

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.

Thanks for your comment, this was created as an early experiment. Due to problems such as excessive weight and insufficient power, at this stage we have not even thought about putting it on the aircraft.😅

@@ken23p Thank you! I'm an old RC builder/pilot, and was in the hobby for about 10 years, (though I haven't built any in many years now). You may be surprised if you look into the large-scale RC aircraft hobbyists websites. Depending on the plane model, the 1/4 scale and even 1/2 scale builders may be very interested in buying this engine from you. In fact, I don't know how much thrust your counter-rotating props and engine generate, but there are a significant number of hobbyists out there that build their own, personal, ultralight-powered aircraft and I'm sure would certainly be interested. I still remember years back when I was at an RC airshow (around the early to mid 90's) and one of the big events at the time was a guy who flew in with a home-built aircraft. It was propelled with two RC JET engines, (not the ducted fan engines). The plane was a single-wing design and the engines were mounted directly to the wings, not the fuselage. The cockpit was functional but not enclosed, (...if I recall correctly). This was incredible for the times because the RC jet engines had only become available to the public 1 or 2 years earlier. He purchased two of the largest jet engines available to consumers and back then, they were ridiculously expensive! Anyway, the point is that these hobbyists are out there and I think you could sell that engine for at least twice what it cost you to build it, (by "costs" I mean it would also include the machine and build time). You could even possibly get 3 times the ultimate costs if you install a variable pitch propeller system, (with the 6061 T6 aluminum props, of course). Then again, your engine is a beautiful piece of work and I could understand if you wouldn't want to part with it. Rich

@@richpaul8132 I agree. The effectiveness of counter-rotation is greatly manifested in model airplanes by canceling out the gyro precession effect. Furthermore, it seems to have been proven that it eliminates air resistance and provides stable thrust. However, in this model, in addition to the mechanical resistance, it was found during test runs that the rotational resistance of the reversing propeller exceeded that of the forward rotating propeller. In other words, it can be determined that the engine is currently unable to reach the normal output according to the catalog data.If this is an electric motor, this can be easily resolved by increasing the battery voltage. It's hard to think about this problem with the engine type, but is it our mission as modelers to somehow solve these problems? I'll do my best to say that.😅

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

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

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

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.

​@@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.

@@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.

Thank you for your comment, it's encouraging.

Thank you for your comment, encouraging.😄

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