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(Gizmodo)   Duke sucks, then compresses, ignites, expands, and exhausts   (sploid.gizmodo.com) divider line 15
    More: Interesting, light aircraft, optimisation, authors  
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909 clicks; posted to Geek » on 15 Jul 2014 at 12:05 PM (22 weeks ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



15 Comments   (+0 »)
   
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2014-07-15 09:48:06 AM  
Pretty interesting. The movement reminds me of a Wankel, even though this is an independent piston design. Pretty cool if it works and can still function well at high RPMs
 
2014-07-15 12:10:16 PM  
So like a swash plate compressor then.
 
2014-07-15 12:12:47 PM  
Science!
 
2014-07-15 12:20:53 PM  
Reminds me of the rotary engines of WW I, where the shaft was fixed to the aircraft, and the entire engine spun with the prop.  The gas/air mixture entered through the hollow crankshaft and there was a single valve, the exhaust, at the top of the cylinder head.  The whole thing threw off tremendous amounts of oil as it spun, which is why you see the large cowls around the engine in those early planes, and one reason pilots wore goggles.
 
2014-07-15 12:22:18 PM  
"Aircrafts"?
 
2014-07-15 12:24:27 PM  

mainsail: "Aircrafts"?


It's like the mile high club, only instead of farking, you're scrapbooking.
 
2014-07-15 12:25:37 PM  
Ok, THAT is farking cool.
 
2014-07-15 12:40:21 PM  
Actually, it resembles the inner mechanism of newer A/C compressors in cars and trucks.
 
2014-07-15 12:40:56 PM  
No audio, did they explain how are they sealing the head to the cylinder?
 
2014-07-15 12:50:57 PM  
leemoyer.files.wordpress.com
 
2014-07-15 03:12:02 PM  
It's a swashplate motor. They've used these things to drive torpedoes for decades, using monopropellant fuel.

I'm not really sure what Duke is doing that's new here, other than the weird pentalobe swashplate gizmo.
 
2014-07-15 03:17:37 PM  
Oh wait, they're rotating the cylinder blocks along with the propshaft with a single header like an old monosoupape rotary.

That's got to take some incredible manufacturing tolerances to not leak oil like a seive. O_O
 
2014-07-15 04:53:59 PM  

Cthulhu_is_my_homeboy: Oh wait, they're rotating the cylinder blocks along with the propshaft with a single header like an old monosoupape rotary.

That's got to take some incredible manufacturing tolerances to not leak oil like a seive. O_O


Like the old rotaries, maybe they don't care.  The old rotaries just blew it into the cowling; this one's enclosed, perhaps that's part of the lubrication scheme.
 
2014-07-15 07:28:19 PM  

Psychopusher: mainsail: "Aircrafts"?

It's like the mile high club, only instead of farking, you're scrapbooking.


I laughed waaaay too hard at that. Thank you.
 
2014-07-16 02:20:10 AM  

Galloping Galoshes: Cthulhu_is_my_homeboy: Oh wait, they're rotating the cylinder blocks along with the propshaft with a single header like an old monosoupape rotary.

That's got to take some incredible manufacturing tolerances to not leak oil like a seive. O_O

Like the old rotaries, maybe they don't care.  The old rotaries just blew it into the cowling; this one's enclosed, perhaps that's part of the lubrication scheme.


If the engine leaks, oil will inevitably make its way into the exhaust. That's just the nature of piston engines. If that's the case, emissions regulations will kill this thing before it goes into production.
 
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