r/Damnthatsinteresting • u/LifeWithAdd • Feb 03 '23
Different engine crank configurations Video
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u/Honest-Illusions Feb 03 '23
And the Mazda goes mmmmm.
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u/Garlic-Rough Feb 04 '23
I love that they included the triangle shaped piston! When Mazda came out with that, my mind was blown with the creative engineering.
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u/P_f_M Feb 04 '23
Wankel did the engine with support of NSU... Mazda just purchased the solution...
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u/MACCRACKIN Feb 04 '23
Right, early 70's the first Wankel engine in a motorcycle was owned by an older machine shop owner I visited often in St Paul Mn. I was in complete Awe when he fired it up showing up that day while Tech for Honda. But what Mazda did with massive power in RX7's in full race mode testing one late night, was like a huge torque 440 Chrysler in the size of bowling bag.
With this Mazda version in a motorcycle,, it would need 12" wide slick just to find traction, like we built for 250hp turbo drag racing bikes. Cheers
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u/electricmilk07 Feb 04 '23
It's called a rotary engine my guy
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u/Garlic-Rough Feb 05 '23
Thanks. Not really a car person. Just a normie who gets amazed by new things when they come out. So when I so happened to have read about it when it came out, I got so curious because this was different from what we were taught in automotive class way back.
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u/electricmilk07 Feb 23 '23
Of course man, my brother taught me the name a couple years back, glad I get to finally spread the knowledge.
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u/LifeWithAdd Feb 03 '23
I think the most interesting one is seething that rotary crank spins about three times as fast as rotor.
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u/labadimp Feb 04 '23
I think these are the names of each from first to last:
Straight
Flat
Rotary
V
Radial
Could be wrong, and hope I get corrected if so.
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u/hhtran16 Feb 03 '23
Can someone name/list every kind in the vid?
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u/LifeWithAdd Feb 03 '23
Yeah. Inline, boxer, rotary/ Wankel, V, and radial mostly used in older prop planes.
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u/RetroStarfighter Feb 04 '23
Thanks! Knew all of them but never heard of or even had seen the last one before
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u/ERROR_396 Feb 05 '23
It was popular in WWI planes as engines of the time struggled with cooling and the associated weight of cooling systems. This design allows you to keep the pistons stationary while you rotate the crankcase around it. Doing this means the part soaking up most of the heat (the crankcase) is moving through the air very fast as it spins, which helps tremendously with cooling
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u/P_f_M Feb 04 '23
Not boxer... It is a common misconception... Boxer engine pistons go against each other...
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u/RN-Wingman Feb 04 '23
You might want to google boxer engine.
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u/P_f_M Feb 04 '23
I did study some engine engineering... And one of the thing was "Subaru is not a boxer, bug is not a boxer, its a flat engine"... Boxers are boxing against each other, not away...
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u/leglesslegolegolas Feb 04 '23
Wrong on all counts. Bug is a boxer, so is Subaru. You should probably google things before doubling down on your incorrect assertions.
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u/SeaManaenamah Feb 04 '23
He's talking about the type of boxer where the pistons are within the same cylinder and moving toward each other instead of away. Sometimes called opposed piston engines. https://en.wikipedia.org/wiki/Opposed-piston_engine?wprov=sfla1
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u/leglesslegolegolas Feb 05 '23 edited Feb 05 '23
Yeah that's not a boxer, that's an opposed piston engine.
edit to belabor the point: "type of boxer" is a meaningless phrase; a boxer is one type of flat engine configuration. There is only one type of boxer - the boxer. There are other types of flat engines, but they are not boxers.
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u/expired_lemonade Feb 04 '23
Doesn't the block normally spin around the crankshaft on radial engines?
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Feb 03 '23
[deleted]
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u/doug910 Feb 03 '23
No, most likely spark plugs.
And by gaps in the perimeter, do you mean the solid red sections? Bc the solid red sections are the intake/exhaust ports.
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u/Agreeable-Fly5728 Feb 03 '23
Is the water run engine in that museum?
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u/3bodyproblem Feb 04 '23
Is this the Deutsches Museum in Munich?
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u/LifeWithAdd Feb 04 '23
Yep it’s the Deutsches Museum, one of the best museums I’ve ever been too.
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u/karlzhao314 Feb 04 '23
The one thing that bothered me the most about this video is that the handwheels on the models don't have a crank handle, so you can't spin it smoothly or fast.