See-through Wankel model airplane engine running
03-16-2018, 07:12 PM
#1
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Watch: See inside a running rotary engine
Watch: See inside a (tiny) running rotary engine
Warped Perspective shows the inside of a running single-rotary Wankel engine
Watch: See inside a running rotary engine | Autoweek
Warped Perspective shows the inside of a running single-rotary Wankel engine
Watch: See inside a running rotary engine | Autoweek
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gwilliams6 (03-26-2018)
03-25-2018, 01:16 PM
#5
///// Upscale Zoom-Zoom
there's a fair amount of liquid fuel in the chambers on some of those test runs!
03-25-2018, 02:26 PM
#6
The fuel is nitro, it's supposed to run rich, but that's excessive. In the comments he says he couldn't get it to run any leaner :/
Fundamentally it illustrates the rotary problem: long combustion chamber where optimal conditions for combustion exist only in the middle-ish. The rear of the face isn't doing a damn thing.
Fundamentally it illustrates the rotary problem: long combustion chamber where optimal conditions for combustion exist only in the middle-ish. The rear of the face isn't doing a damn thing.
03-26-2018, 01:01 PM
#7
40th anniversary Edition
The fuel is nitro, it's supposed to run rich, but that's excessive. In the comments he says he couldn't get it to run any leaner :/
Fundamentally it illustrates the rotary problem: long combustion chamber where optimal conditions for combustion exist only in the middle-ish. The rear of the face isn't doing a damn thing.
Fundamentally it illustrates the rotary problem: long combustion chamber where optimal conditions for combustion exist only in the middle-ish. The rear of the face isn't doing a damn thing.
03-26-2018, 02:02 PM
#8
Smoking turbo yay
Hmm, I wonder why not 3 spark plugs? Cost?
I mean, the 787B 26B engine had 3 spark plugs for each rotor and it looks like the new shoebox range extender also has 3 ignition wires attached to one side of the engine.
I mean, the 787B 26B engine had 3 spark plugs for each rotor and it looks like the new shoebox range extender also has 3 ignition wires attached to one side of the engine.
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gwilliams6 (03-26-2018)
03-26-2018, 03:26 PM
#9
Super Moderator
love it..thanks for posting.
Now RE noobs 'may' get a better understanding on how, particularly engine flooding, emissions, fuel economy, etc.
And why Mazda has huge engineering problems even getting close to regulatory targets for today's 'green' world.
And I am not going to spell it out if you cant see it.
Hydrogen was and is the future for a RE powered only car, but we know why it will probably never happen.
R I P
Now RE noobs 'may' get a better understanding on how, particularly engine flooding, emissions, fuel economy, etc.
And why Mazda has huge engineering problems even getting close to regulatory targets for today's 'green' world.
And I am not going to spell it out if you cant see it.
Hydrogen was and is the future for a RE powered only car, but we know why it will probably never happen.
R I P
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gwilliams6 (03-26-2018)
03-28-2018, 03:33 AM
#10
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The fuel is nitro, it's supposed to run rich, but that's excessive. In the comments he says he couldn't get it to run any leaner :/
Fundamentally it illustrates the rotary problem: long combustion chamber where optimal conditions for combustion exist only in the middle-ish. The rear of the face isn't doing a damn thing.
Fundamentally it illustrates the rotary problem: long combustion chamber where optimal conditions for combustion exist only in the middle-ish. The rear of the face isn't doing a damn thing.
These engines need a minimum of 25% oil in the fuel, most of it being castor oil. So that fluid sloshing around could very well be oil.
As a matter of fact, when I quickly advance the throttle I can see a spray of white liquid coming out of the exhaust before the "normal" exhaust smoke is restored: that's a stream of hot oil being ejected...
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gwilliams6 (03-31-2018),
Loki (03-28-2018)
07-10-2018, 01:04 PM
#12
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Well, 29000 rpm while not doing anything useful, like spinning a propeller to cool itself 
I wonder how many seconds it would last if held at that speed, especially with no cooling other than the fuel itself...
I wonder how many seconds it would last if held at that speed, especially with no cooling other than the fuel itself...
07-10-2018, 01:14 PM
#13
Smoking turbo yay
It's just air-cooled rather than liquid-cooled. Forced convection would help, but probably not necessary.
The thing doesn't have much of a load on it, and I doubt it generates enough heat as it generates like 0.01 HP of mechanical power. The dude even put his finger on the engine and he doesn't get burnt.
The thing doesn't have much of a load on it, and I doubt it generates enough heat as it generates like 0.01 HP of mechanical power. The dude even put his finger on the engine and he doesn't get burnt.
07-10-2018, 01:17 PM
#14
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I have one of those engines powering a little Q500 type RC airtplane.
These engines need a minimum of 25% oil in the fuel, most of it being castor oil. So that fluid sloshing around could very well be oil.
As a matter of fact, when I quickly advance the throttle I can see a spray of white liquid coming out of the exhaust before the "normal" exhaust smoke is restored: that's a stream of hot oil being ejected...
These engines need a minimum of 25% oil in the fuel, most of it being castor oil. So that fluid sloshing around could very well be oil.
As a matter of fact, when I quickly advance the throttle I can see a spray of white liquid coming out of the exhaust before the "normal" exhaust smoke is restored: that's a stream of hot oil being ejected...
07-11-2018, 11:33 AM
#15
Registered
It's just air-cooled rather than liquid-cooled. Forced convection would help, but probably not necessary.
The thing doesn't have much of a load on it, and I doubt it generates enough heat as it generates like 0.01 HP of mechanical power. The dude even put his finger on the engine and he doesn't get burnt.
The thing doesn't have much of a load on it, and I doubt it generates enough heat as it generates like 0.01 HP of mechanical power. The dude even put his finger on the engine and he doesn't get burnt.
Also, even if there is no "explicit" load on that engine, that means that it's using all of the power it produces at 29000 rpm into overcoming its internal friction and pumping losses. I have no idea how much power it may make at that RPM, but for sure it's more than 0.01hp. Bear in mind that, according to the manufacturer, it produces 1.27hp at 17000 rpm. Even if it the power curve drops significantly between 17000 and 29000 rpm, I doubt it can be producing less than 0.5hp at 29000 rpm. And that means 0.5hp worth of heat with zero cooling airflow. Not good...
Not to mention RC engines are terribly inefficient due to their small size; even the piston RC motors consume high amounts of fuel due to: poor fuel metering/injection control and small piston cross-sectional area. I would say any issues that afflict normal-sized engines are merely exaggerated in RC motors, in addition to the lubrication factors and use of nitro-meth mixtures.
That said, fuel efficiency is not as important for RC engines as it is for full size engines (at least up to a certain point). Reliability and power to weight ratio are more important. That's why some folks run alcohol fuel even with spark-ignition engines, where they could use much cheaper gasoline instead.
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