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#3425794 - 07/15/14 06:33 PM Duke engine......better design?
mcrn Offline


Registered: 11/30/05
Posts: 2723
Loc: FL
http://sploid.gizmodo.com/this-is-the-we...dium=socialflow

I searched and could not see that this had been previously posted.

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#3425852 - 07/15/14 07:22 PM Re: Duke engine......better design? [Re: mcrn]
sicko Offline


Registered: 09/22/08
Posts: 1464
Loc: Virginia
That first image is seriously cool to look at.


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#3425867 - 07/15/14 07:36 PM Re: Duke engine......better design? [Re: mcrn]
webfors Offline


Registered: 06/06/06
Posts: 4031
Loc: Great White North.. eh
Awesome! I would love to see this engine in production.
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#3425910 - 07/15/14 08:14 PM Re: Duke engine......better design? [Re: mcrn]
gregk24 Offline


Registered: 04/13/13
Posts: 3540
Loc: FL, USA
Wow, looks pretty cool. Not sure how reliable things would be though. Looks like it could have sealing issues.
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#3425914 - 07/15/14 08:18 PM Re: Duke engine......better design? [Re: mcrn]
Quest Offline


Registered: 12/19/04
Posts: 6845
Loc: beaver land EH?
mechanical complexity, coupled with sealing problems (just like wenkel engines), will plague this design in production mode.

Q.
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#3425916 - 07/15/14 08:24 PM Re: Duke engine......better design? [Re: gregk24]
Nick1994 Offline


Registered: 02/19/13
Posts: 2511
Loc: Phoenix, AZ
Originally Posted By: gregk24
Wow, looks pretty cool. Not sure how reliable things would be though. Looks like it could have sealing issues.


That's what I thought. After many years of use, things are gonna start losing their pressure, metal will fatigue and the whole engine will need replaced. Interesting concept though.
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#3425949 - 07/15/14 08:46 PM Re: Duke engine......better design? [Re: mcrn]
Win Offline


Registered: 02/05/03
Posts: 3538
Loc: Arkansas
Looks like a wobble plate type of air conditioning compressor.

With spark plugs.
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#3425950 - 07/15/14 08:47 PM Re: Duke engine......better design? [Re: mcrn]
Chris142 Offline


Registered: 06/05/03
Posts: 12336
Loc: apple valley, ca
very similar to many a\c compressors
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#3425952 - 07/15/14 08:50 PM Re: Duke engine......better design? [Re: mcrn]
Subdued Online   happy


Registered: 10/06/13
Posts: 418
Loc: Youngstown, NY
that's a technological terror if I've ever seen one
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#3425979 - 07/15/14 09:11 PM Re: Duke engine......better design? [Re: Chris142]
scurvy Offline


Registered: 02/19/07
Posts: 2284
Loc: Chicago IL USA
Originally Posted By: Win
Looks like a wobble plate type of air conditioning compressor.

Originally Posted By: Chris142
very similar to many a\c compressors


Quite right. Same design as many existing AC compressors, which work beautifully. No reason it couldn't be adapted to work with spark or compression ignition.
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#3426249 - 07/16/14 07:38 AM Re: Duke engine......better design? [Re: Win]
Trav Offline


Registered: 11/20/06
Posts: 11506
Loc: MA, Mittelfranken.de
Originally Posted By: Win
Looks like a wobble plate type of air conditioning compressor.

With spark plugs.

Just did a Sanden and it looked just like this 7cyl.
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#3426363 - 07/16/14 10:32 AM Re: Duke engine......better design? [Re: mcrn]
morris Offline


Registered: 08/24/08
Posts: 3681
Loc: ks, wichita
just count the weight of the moving parts. that will tell you all you need to know.

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#3427006 - 07/16/14 09:39 PM Re: Duke engine......better design? [Re: mcrn]
Ram01 Offline


Registered: 10/13/10
Posts: 719
Loc: New York Queens
Wonder what weight oil that motor takes

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#3427035 - 07/16/14 10:24 PM Re: Duke engine......better design? [Re: mcrn]
Kiwi_ME Offline


Registered: 10/24/08
Posts: 833
Loc: New Zealand
I should be patriotic but I think it's a nightmare too. Oddly the animated GIF shows the block stationary while the video shows it rotating, as it needs to, to move pistons past the ports and spark plugs. Perhaps the crank turns at twice head speed for a 4-stroke cycle.
Sealing the head under combustion pressure along with the complex machining of the wobble plate and con rods make it unattractive to me. And the touted advantages of balance and part count answer questions nobody has actually asked.

Compressors use this type of idea (wobble plate with a large number of small cylinders) to avoid pressure pulses in the input/output, hardly an issue in an IC engine where small cylinders have the disadvantage of high heat loss.

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#3427134 - 07/17/14 04:09 AM Re: Duke engine......better design? [Re: mcrn]
bruno Offline


Registered: 10/08/07
Posts: 417
Loc: new Jersey
Back in the '50s this was tried .... it was called a Swash Plate design . Fine for clean conditions like AC compressors but otherwise it was a dud .

Just because it can be done doesn't mean it's worth doing .


Edited by bruno (07/17/14 04:11 AM)

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#3429787 - 07/20/14 12:42 AM Re: Duke engine......better design? [Re: bruno]
Quest Offline


Registered: 12/19/04
Posts: 6845
Loc: beaver land EH?
Originally Posted By: bruno
Back in the '50s this was tried .... it was called a Swash Plate design . Fine for clean conditions like AC compressors but otherwise it was a dud .

Just because it can be done doesn't mean it's worth doing .


+1 with what Bruno said.

Remember: unlike sealed A/C compressor, which runs in a sealed, uncontaminated environment lubricated with compressor oil, etc. (which remains uncontaminated/not deteriorated) for a long, long time; exposing to fuel and air, and dirt in air (abrasion), combustion byproducts, blowby, moisture/condensation, etc. there will be no guarantee on how long/reliable such design would be, and also the inherent energy conversion efficiency also.

Just because it looks good in theory doesn't mean it would be meaningful/practical in real-life situation.

Afterall: we have been constantly refining/improving the venerable internal reciprocating combustion engine design for a century now, it would be challenging to start from scratch to design something even better...

I know it's not 100% impossible, but it would be challenging.

Q.
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#3430544 - 07/20/14 07:38 PM Re: Duke engine......better design? [Re: mcrn]
Shannow Online   content


Registered: 12/12/02
Posts: 28539
Loc: a prisoner island

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#3433464 - 07/23/14 02:30 PM Re: Duke engine......better design? [Re: mcrn]
A_Harman Offline


Registered: 10/01/10
Posts: 4873
Loc: Michigan
Google search barrel engines and read up on their long, unsuccessful history.
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