Part 6: V8 model engine with rotary valve / Cylinder, Cylinderhead & Rotary Valve

[@jimwinchester339]

I had a similar idea way back in the late 68's when I was only 12. Everybody I showed drawing to agreed it was viable, but my dad stopped short of actual funding development. My approach was to simply have a pair of longitudinal tubes running down the length of the head - much like a rolling pin with 4 rectanguliar holes in it. I learned later of simlar work by Coates & co. and others. Best wishes.

[@danielhunziker3577]

Hey Jim 👋 Interesting! I had the idea of this type of control roller when I was 16 and then built my first 1-cylinder engine when I was 18 during my apprenticeship as a mechanic (in the evening after work). Unlike you, they all thought my concept was nonsense. I said to myself: I'll show them! That's how my first prototype came about. Of course, I didn't know at that point that similar designs already exist. But that doesn't matter, because the inventive spirit was awakened. Reading between the lines, your idea has been stuck with you up today. You are no longer dependent on your father's support. Why you don't try to implement your rolling pin design on your own way? Best regards from Switzerland!

[@johnpearson492]

In many ways, your build is far more impressive than my brother and I's rotary build. I just noticed a few details in this video I had not before. The dual spark plug or glow plug holes are a nice touch. The way you did the port in the head, as a very long port is interesting, it made it so that you don't need to overlap the exhaust and intake along the length of the valve.

[@danielhunziker3577]

Hi John! Thanks man! It's not really comparable with a real car engine. It's still a simple model engine. Your BMW rotary valve design with moveable cylinder inlet is impressive and yes, I will do such a version as well with a model engine! You and your bother inspired my! Love you guys! In the beginning, I wanted to made a cross rotary valve with only one valve. But this would cause other problems, espacially in manufacturing, and so I made the dual valve version. Yes, this version has dual plug. The plug is close to the cylinder so I made that to increase the ignition behavior.

[@Alexie3333]

@john. Where can I find a video of your brothers bmw valve engine?

[@paradiselost9946]

thinking on it... its a genius idea... cam shaft or two per cylinder, rather than bank. eliminates any whipping... not a fan of gear drives due to backlash but it can be fixed with idlers on eccentrics. allows for some relatively easy implementation of variable timing... more room to play, at least. still, personally, rotary valves will never get over that exhaust heat issue, not without drastically increasing expansion strokes to cool gas beyond regular petrol/diesel EGTs... ie, atkinson type thing...

[@johnpearson492]

@@Alexie3333 look up "Rotary Valve e36." There are many videos on my brother's channel, "Pizzaman09"

[@johnpearson492]

@@paradiselost9946 I'm curious, why do you say there is an exhaust gas temperature issue on a rotary valve head?

[@andrekustner2015]

Wow 😱 ich bin auf den ersten Lauf gespannt 🙌

[@danielhunziker3577]

Ich auch sehr! Muss aber noch ein wenig daran Arbeiten bis es soweit ist ;-)

[@MrPizzaman09]

Are you expecting the rotary valve to expand when hot to take up the clearance to your honed sleeves?

[@danielhunziker3577]

Hi Pizzaman! Yes, it will expand. This is a problem with this design. The most critical point is on the exhaust side on the end of the rotary valve (transition to the manifold). My first designs all seized there due heat expansion. When you look closely, you can see that my rotary valves have a clearance in this section to prevent that. To intake side is cooling the rotary valve from inside (as well a reason why bronze material, it has a good thermal conductivity). But the biggest impact is the rc fuel. 20% oil, 12 nitro and the rest methanol. The oil and nitro cools the engine excellent from inside! With gasoline, I'm quiet sure my rotary valve design wouldn't work. The only conceivable solution wuth this design would be to cool the rotary valve from the inside with coolant (but this is not really doable in practice). With gasoline, an active sealing with room for heat expansion is needed. Like in your BMW with cylinder head inlets! Hope to see new content in future :-) Love it!!!

[@MrPizzaman09]

@@danielhunziker3577 Our exhaust side on the rotary valve hit about 650F

[@danielhunziker3577]

​@@MrPizzaman09 Yeah, the heat on the exhaust of the rotary valve is the hotspot in the system. There is a system or space needed to let the rotary valve thermal expand itself. Fortunately, the temperature problem isn't so critical with a model engine.

[@tasoskarapanagiotis1159]

Great Job Daniel keep pushing excellent work as always

[@danielhunziker3577]

Thanks, will do!

[@barriegregory6606]

F1 isn't production, there valves are not closed with springs but that will never be used on production engines because of the cost & reliability, you condoned what I said by saying it has been discontinued, thank you.

[@bobbymeyerti9300]

Oh you are almost there!! So one thing I noticed is 😱 that there is no oiling mechanism for those bronze sleeve Valve??? ( and they will overheat and distort ) And if you put oil to it??? It would be sucked right into the cylinder .... but if you put in a ring of some type ???? like a piston ring??? on that valve sleeve???? to hold the oil back from entering The cylinder???? lubrication can happen... and the ring will have to be of some form of metal it cannot be rubber or plastic... it would get too hot and melt...

[@Darren_Fawcett]

Very nice work mate

[@danielhunziker3577]

Thanks man!

[@rc-engine7135]

Klasse Arbeit 👍 sehr ordentlich gearbeitet weiter so 😁👌

[@danielhunziker3577]

Danke dir! Für dieses Video war es echt viel Arbeit. Schön, wenn das Anklang findet :-)

[@antonis476]

great work

[@danielhunziker3577]

Thanks man!

[@shawns0762]

I have patents for something similar. It uses one shaft twice the diameter of the piston bore with angled ports in it. I already made a straight six wooden model with rotating parts.

[@danielhunziker3577]

Hey Shawn! Would be nice to see your design in a engine running! Is it something like the coates or Bishop ones or something completley different?

[@shawns0762]

​@@danielhunziker3577It's inline with the pistons like the Coates design. Intake and exhaust in the same shaft. I already bought six pistons to build a running prototype. I also have patents for a internal combustion/ steam engine hybrid. It would consist of a compression ignition engine with no cooling system. Instead it would have 2 electronically controlled injectors per cylinder. 1 for fuel, 1 for water. When the engine reaches operating temperature the computer would alternate the firing of the fuel and water injectors to regulate temperature. It solves the cooling issue with the rotary concept.

[@royroye1643]

@@shawns0762 Whats the patent numbers?

[@shawns0762]

@@royroye1643 They are provisional patents from a few years ago. Some other people have similar patents for the steam/internal combustion engine concept. Steve Crower from Crower camshafts built a running 1 cylinder prototype. Conventional valves won't last long under those circumstances because they will oxidize

[@dhitoaprabowo8192]

What the model look like? Can you send me pic?

[@gmcevoy]

Wow! It looks fantastic! Are the rotary valves going to be lubricated in any way while the engine is running?

[@danielhunziker3577]

Hi Geoffrey! Good question! Yes. There is 20% oil in the rc fuel which will lubricate dynamic the rotary valve when the engine runs. But there is no oil pump or oil system in the engine included. Everything is lubricated with the high amount of oil in the fuel.

[@gmcevoy]

@@danielhunziker3577 Like a two stroke engine would be. Good thinking.

[@danielhunziker3577]

@@gmcevoy Correct!

[@argentumflower592]

So was hätte man in den 70er in der Formel 1 in gross haben sollen, damit hätte man jedes Rennen gewonnen.

[@danielhunziker3577]

1997 konstruierte Herr Bishop zusammen mit Mercedes einen V10 3l Formel 1 Motor. Getestet wurde mit einem 300ccm 1 Zylinder. Die Tests auf dem Prüfstand ergaben 10% mehr Leistung als mit klassischen Ventilen, bei zu gleich höherer Standzeit. Auch war der Motor leichter. Als die Ergebnisse in der Fachzeitschrift FISITA präsentiert wurden, reagierte die FIA und schrieb neu ins Motorenreglement, dass nur klassische Ventile erlaubt sind. Das steht bis heute so im Reglement.

[@argentumflower592]

@danielhunziker3577 Ja den Motor kenn ich, genau so den MGN W12. Auch gab es ein n Prototyp von einem Motorradmotor. Auch die Motorradmotor Konstruktion von Mark Walker sind sehr interessant auch wenn sie nicht auf Leistung getrimmt sind.

[@zafar78600]

anything works on computer simulation.

[@danielhunziker3577]

Mmm... I understand: My engine design won't work and is pure theory?

[@generico896]

Any updates?

[@danielhunziker3577]

@@generico896 m.kzbin.info/www/bejne/bnWmi4doZpuMjLs

[@michaelatkin9649]

Idk why BMW had to make the rotary valve complicated to where it could have issues. This didn't save weight, components and issues. A rotary valve should be made to get away from these issues with the poppet valve

[@danielhunziker3577]

Hi Mike! You're right. It's not better than an engine with regular poppet valves. Otherwise all big car manufactures would use it in their engines. But hey, it's fun to make some different and I very like exotic engines. I hope you enjoy my work :-)

[@barriegregory6606]

Rotary valves have been around for 100 yrs & nobody made them efficient, they open & close way too slow, the poppet valve as used by F1 engines work efficiently & reliably, don't try to reinvent the wheel, even steam engines abandoned sleeve valves in favor of poppet valve, at the end there production.

[@danielhunziker3577]

I don't know what exactly you're trying to tell me. But your statement that nobody has improved Rotary Valves and made them more efficient is not correct. By 2004, Bishop Innovation, in collaboration with Mercedes, had developed a 3 litre V10 Formula 1 engine and built a 1 cylinder test engine. This had 10% more power, was more durable and lighter. It revved up to 25,000 rpm and hat a compression ratio of 15.3:1! Testing of these engines was prematurely terminated when the FIA announced changes to Article 5.1.5 of the engine regulations late in 2004 with the specific purpose of banning this rotary valve technology. As you can see, there is potential, especially in racing. But if the FIA prohibits it in the engine regulations, there will unfortunately be no further developments.

[@barriegregory6606]

@@danielhunziker3577 when you say a V10 Mercedes engine I presume you refer to the one's built for them in Britain by Ilmore but built in Britain anyway, maybe the European governing body didn't want another British engine cleaning up as usual. You can't compare a prototype F1 engine with production engines, F1 use nitrogen to close the valves which work's well on F1 motors but isn't commercialy possible. Lubricating & cooling rotary valves make their emissions illegal for anything larger than a model aircraft engine.

[@danielhunziker3577]

Just enjoy the exotic model engines and the technical realisation ☺ Model engines simply have very little in common with real racing or car engines. Simply enjoy!

[@MetalMachineShop]

Lovely work! Maybe you already said in your other videos (I’ll watch them later) but I’d like to see your CNC mill set up. Where did you get the 3D printed metal parts done? Love the grinding attachment too, I must make one of those. Best wishes.

[@danielhunziker3577]

​@@MetalMachineShop Good questions! My machine setup is quite primitive and simple. I have an Optimum D320 lathe and an Optimum BF30 with a 4-axis CNC attachment. Of course, I have also built various tools myself, which I use. One thing, as you have noticed, is my grinding attachment on the lathe (it's very useful!). It was always important to me to make all milled and turned parts myself, including those made of titanium or magnesium. So you have to build the brackets and tools yourself. But thats fub as well! I make the SLM parts together with the company Ecoparts in Switzerland. You have to work closely with the manufacturer to get the design right. There are many design guidelines that need to be taken into account in order to end up with a good component. Best regards from Switzerland!