Rotary had it's problems with the sealings as well. But weight was also low, less moving parts and less parts as well. Mazda is still working on it and may put it as a range extender in future hybrid electric cars. Let's see what time brings us.
Because rotory engines like high RPM and are really efficient in constant high-speed operation, pairing a small rotary in the same casting with a gen set, and running it at like 10-15K RPM would get you a great electrical output, at a very, very light weight. I'm waiting for Mazda to finally announce how they are going to do this.
@@JohnKickboxing Length of combustion is related to speed of the wave front in the combustion chamber. If you read research on the thermodynamics of combustion chambers, you will see that different fuels have different speeds of the wave front, and thus combustion time. Using a rotary as the power source for an electrical genset, could thus be easily optimized for peak efficiency, by both rotary hardware design and careful choice of engineered fuels.
@@JohnKickboxing One of the fuels being considered for this type of solution is hydrogen. At relevent compression ratios and temperatures, it's about 4/5 times faster than the longer hydrocarbons in gasoline. So the theoretical efficiency of such a constant speed rotary is pretty dang good. Not as efficient as a fuel cell perhaps, but considerably lighter. So it is probably a good choice for things like aviation or competitive racing. That sort of thing.
This is the Duke engine, it's used in torpedoes. The head gasket is easy enough to fix, just make the cylinder head slightly larger and mill a recess in the block with a corresponding ridge in the head. The ridge would push the gasket into the recess. In order for the compression to blow out the gasket, it would have to push through all that aluminum (or iron or steel or whatever the cylinder head and block are made out of).
The 'head' sealing issues, swash plate bearing loads and lubing, and thus life, piston to pin/road loads and cooling have been issues preventing such designs from leaving dev labs in the past. One of the biggest issues with the swash plate lubing is that it is unsuitable for plain bearings where the rod connects. Look at the joint, imagine the bearing, see the issue.
Michel solved it nearly a century ago. Only thrust bearing that can create and maintain the required oil film. Still used in ships... And still, axial engines just never got popular.
The immediate problem with the Duke design is the retention of the cylinder head. This implies the force of the explosion presses against the container producing friction, restraining the rotation of the cylinder block. Why not an opposed piston design ? By making the swash plates adjustable the compression and expansion ratios could be adjusted to suit whatever fuel has been selected and the force currently inducing friction at the cylinder block end could be used. Its difficult to judge how well piston slap has been resolved, especially at high revolutions. Its definitely a design where the devil is in the details.
When I was an Engineering student in the early 70's, I saw a model of this engine design! At that time they called it a 'Swash Plate' engine design! Here's a quote from a Wikipedia entry on the Swash Plate engine design.... "A swashplate, also known as slant disk............ was invented by Anthony Michell in 1917"!!!
He was one of many. Yes, he made a working, reliable swashplate type. His thrust bearing is genius. Check out his three piston opposed engine! Theres also spider yoke and rod types... lamplough did that late 1890 or so. The issue is the line of contact follows a spherical path... swashplates and roller bearings scrub. Radial line of contact... think tapered roller bearings. All surfaces converge to a point... Cant do it on a swashplate without using michels thrust bearing... oil films dont scrub!
I've heard of this engine type before and think it's better than the typical engine but not as good as the updated rotary engine with Ernie Brink's problem solution fixes that have made the rotary engine be what it was meant to be or that is to say live up to it's potential.
This engine doesn't truly solve anything. It's a little bit lighter weight with a few less moving parts, but its a little dubious in how it achieves this. The issue with moving parts isn't the fact that you have parts that are moving. The problem with moving parts is that they wear down due to friction. I could be completely wrong here, but it looks like they reduced the number of parts, but increased the total wear surface area. You probably come out ahead on the duke engine, but not by much. I would also bet that this engine is a lot harder to machine and produce.
Pressures, converging lines of contact versus spherical paths, versus simple circles of traditional cranks, bearings that slide and scub rather than roll... Yes, most people have no idea about the IMPORTANT aspects of an engine...
Have you done a video on the Waissi and Revetec engines? They're pretty cool and almost made it to production. Unfortunately I think automotive politics led to the ideas being canceled.
Super interesting. It's amazing how engines work. Not surprised subaru found the boxer motor and stuck with it for so long. Electric motors are good in the idea of less moving parts, im just not a fan of tesla. I would much rather convert a Volkswagen golf to electric for $10-20 grand instead of buying an over complicated hundred thousand dollar car.
I think It's beautiful and we have the technogy to build them. My choice is the Achate engine. It can be reduced in size and make it into a great EV car extender.
Axial/ Barrel engines are old, it had scavenging, volumetric efficiency issues, as well as cooling and servicing difficulties. This other one: INNengine, is nice too th-cam.com/video/yw9R57LpbK0/w-d-xo.html Blessings +
Any piston engine is a fail! It's so unlogical to make linear energy/power translate it into rotary and finally again into linear motion. And all of this with 20-30% efficiency and lots of other problems...
With electric on the horizon, there is no point, its a matter of time, 1 battery breakthrough and internal combustion will be equal to horses, only a couple of romantics like me will want them
Maybe not. No matter how good the battery, it still has to be charged. Wind is an overall loss of energy , and solar fluctuates, while power plants are being shut down. Can’t magically plug in your electric when the power Is out.
The only problem it's that we have to stop using fossil fuels, of any type, by 2050 or sooner. So i woild not want to waste any precious time by developing another combustion engine. We have to stop polution, we should focus more on solving electric vehicles problems an just enjoy wathever combustion engine we still can run till then.
Rotary had it's problems with the sealings as well. But weight was also low, less moving parts and less parts as well. Mazda is still working on it and may put it as a range extender in future hybrid electric cars. Let's see what time brings us.
Because rotory engines like high RPM and are really efficient in constant high-speed operation, pairing a small rotary in the same casting with a gen set, and running it at like 10-15K RPM would get you a great electrical output, at a very, very light weight. I'm waiting for Mazda to finally announce how they are going to do this.
@@kentalanlee The length of combustion in rotary engine is too short, and that cause inefficiency.
@@JohnKickboxing Length of combustion is related to speed of the wave front in the combustion chamber. If you read research on the thermodynamics of combustion chambers, you will see that different fuels have different speeds of the wave front, and thus combustion time. Using a rotary as the power source for an electrical genset, could thus be easily optimized for peak efficiency, by both rotary hardware design and careful choice of engineered fuels.
@@kentalanlee Then what fuel can get burnt fast enough for short combustion lenght engine?
@@JohnKickboxing One of the fuels being considered for this type of solution is hydrogen. At relevent compression ratios and temperatures, it's about 4/5 times faster than the longer hydrocarbons in gasoline. So the theoretical efficiency of such a constant speed rotary is pretty dang good. Not as efficient as a fuel cell perhaps, but considerably lighter. So it is probably a good choice for things like aviation or competitive racing. That sort of thing.
I’d like to see what the engine weight per horsepower is, there is potential in such things as snowmobiles, go karts, ultra light aviation
This is the Duke engine, it's used in torpedoes. The head gasket is easy enough to fix, just make the cylinder head slightly larger and mill a recess in the block with a corresponding ridge in the head. The ridge would push the gasket into the recess. In order for the compression to blow out the gasket, it would have to push through all that aluminum (or iron or steel or whatever the cylinder head and block are made out of).
The 'head' sealing issues, swash plate bearing loads and lubing, and thus life, piston to pin/road loads and cooling have been issues preventing such designs from leaving dev labs in the past.
One of the biggest issues with the swash plate lubing is that it is unsuitable for plain bearings where the rod connects. Look at the joint, imagine the bearing, see the issue.
later model has universal joint style connection between piston and stator/reciprocator , other bearing problems negligible
spinning block fail ,sliding port valve fail.
Michel solved it nearly a century ago. Only thrust bearing that can create and maintain the required oil film. Still used in ships...
And still, axial engines just never got popular.
Known about these for a hot minute. They work, but they’re far from a replacement. Like rotaries, they have their own world of problems to work out.
The immediate problem with the Duke design is the retention of the cylinder head. This implies the force of the explosion presses against the container producing friction, restraining the rotation of the cylinder block.
Why not an opposed piston design ? By making the swash plates adjustable the compression and expansion ratios could be adjusted to suit whatever fuel has been selected and the force currently inducing friction at the cylinder block end could be used.
Its difficult to judge how well piston slap has been resolved, especially at high revolutions. Its definitely a design where the devil is in the details.
Might be a great ultra low displacement race motor. Like a rotary.
I think this could replace the current combustible engine.
Great stuff, BUT, fuel does not explode in the cylinder, it burns, and that burn is very controlled.
Yeah😂, i just like saying it explodes
Heat into mechanical force sounds lame😂
I remember watching someone turn a ac compressor into a ICE that seemed pretty similar to this
Looks like a hydraulic pump/motor with a swashplate. I bet it has a lot more frictional losses than a traditional reciprocating engine.
When I was an Engineering student in the early 70's, I saw a model of this engine design! At that time they called it a 'Swash Plate' engine design! Here's a quote from a Wikipedia entry on the Swash Plate engine design....
"A swashplate, also known as slant disk............ was invented by Anthony Michell in 1917"!!!
He was one of many.
Yes, he made a working, reliable swashplate type. His thrust bearing is genius. Check out his three piston opposed engine!
Theres also spider yoke and rod types... lamplough did that late 1890 or so.
The issue is the line of contact follows a spherical path... swashplates and roller bearings scrub. Radial line of contact... think tapered roller bearings. All surfaces converge to a point...
Cant do it on a swashplate without using michels thrust bearing... oil films dont scrub!
Needs a bit of work but it's absolutely doable and has the advantage of multi fuels . I see big things for this engine.
I would love to have this engine in my car 🚗 and be an engine tester, amazing idea
Andy loves it
I've heard of this engine type before and think it's better than the typical engine but not as good as the updated rotary engine with Ernie Brink's problem solution fixes that have made the rotary engine be what it was meant to be or that is to say live up to it's potential.
What if they had the exhaust doing the same [co-axial crank?]?
This engine doesn't truly solve anything. It's a little bit lighter weight with a few less moving parts, but its a little dubious in how it achieves this. The issue with moving parts isn't the fact that you have parts that are moving. The problem with moving parts is that they wear down due to friction. I could be completely wrong here, but it looks like they reduced the number of parts, but increased the total wear surface area. You probably come out ahead on the duke engine, but not by much. I would also bet that this engine is a lot harder to machine and produce.
Pressures, converging lines of contact versus spherical paths, versus simple circles of traditional cranks, bearings that slide and scub rather than roll...
Yes, most people have no idea about the IMPORTANT aspects of an engine...
Nice vid
keep it up
Thanks😁
Have you done a video on the Waissi and Revetec engines? They're pretty cool and almost made it to production.
Unfortunately I think automotive politics led to the ideas being canceled.
Super interesting. It's amazing how engines work. Not surprised subaru found the boxer motor and stuck with it for so long. Electric motors are good in the idea of less moving parts, im just not a fan of tesla. I would much rather convert a Volkswagen golf to electric for $10-20 grand instead of buying an over complicated hundred thousand dollar car.
Or you can just buy an electric golf aka e-golf
Didn't they make a Stirling engine like that?
tHe way pistons interact reminds me of the E-Rex engine from INNEngine
I think It's beautiful and we have the technogy to build them. My choice is the Achate engine. It can be reduced in size and make it into a great EV car extender.
I remember them from the 1980's
Can it be adapted to a VW,, I’ll try one,,
4:19
I see that big cylinder
House cone pipe
(Sliding head) (yike i see problem) (no?)
2:32. Says way
Say weight (wait wayyeett)
I be watch this duke
A. Good 6 yr while..
Is nice
2:45 beauty
A/C compressor with explosions basically
Axial/ Barrel engines are old, it had scavenging, volumetric efficiency issues, as well as cooling and servicing difficulties. This other one: INNengine, is nice too th-cam.com/video/yw9R57LpbK0/w-d-xo.html
Blessings +
3:04 spark ignite diesel is not..
Any piston engine is a fail!
It's so unlogical to make linear energy/power translate it into rotary and finally again into linear motion. And all of this with 20-30% efficiency and lots of other problems...
Imagine Coaxial opposed piston engine far more efficient
It’s kinda like a A/C compressor
Didn't say how much torque it makes. Only horsepower reading, which equals torque x speed.
1:46
1:52
Fail err disagree with each other (sliding head not show)
I heard that the fuel efficiency of these is very low.
Swashplate / wobble plate engines are long dead and buried. Beating a dead horse has never brought any benefit.
A solution for which there is no problem
this wont solve the piston having to go different directions tho
I really want to see that rotary engine so bad.
Which one😂
@@ChrisVSCars the one with the two holes in it. Looked like the number 8
With electric on the horizon, there is no point, its a matter of time, 1 battery breakthrough and internal combustion will be equal to horses, only a couple of romantics like me will want them
Maybe not. No matter how good the battery, it still has to be charged. Wind is an overall loss of energy , and solar fluctuates, while power plants are being shut down.
Can’t magically plug in your electric when the power
Is out.
B/S
torpedo engine
The only problem it's that we have to stop using fossil fuels, of any type, by 2050 or sooner. So i woild not want to waste any precious time by developing another combustion engine.
We have to stop polution, we should focus more on solving electric vehicles problems an just enjoy wathever combustion engine we still can run till then.
EV are mostly powered by fossil fuels.
First!