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  #16  
Old 01-28-2013, 11:51 AM
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I recall reading about the early use of diesels in some of the dirigible airship programs in the 1920s. The article stated the British used Beardmore locomotive diesels in their R101 airship. The maiden flight ended in disaster when it crashed and exploded in France. No fault of the diesels.

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  #17  
Old 01-28-2013, 12:05 PM
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Quote:
Originally Posted by Adriel View Post
Please elaborate.
Maybe lean combustion.
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  #18  
Old 01-28-2013, 12:37 PM
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In today's environment, it's probably only a matter of time before 100LL goes away. I have a hunch that there will be a trend toward aviation Diesel engines. One of the more popular powerplants for experimental (homebuilt) aircraft is the Subaru engine. It so happens that Subaru makes an aluminum boxer diesel in Europe of a suitable weight and power configuration that it could theoritically be used for aircraft use. I'm watching for someone to build a redrive unit and other components needed to use this engine in experimental aircraft. I know someone that burns JetA in his MB diesels but adds some biodiesel for proper lubrication. I suspect the same will be needed for aircraft engines. Perhaps experimentation will show that burning 1-2% two-cycle oil will provide enough lubricity that a pilot could afford to carry the additive with him for on-airport fueling. For local use there would be no reason why red-diesel couldn't be used since it is clearly "off road".
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  #19  
Old 01-28-2013, 03:11 PM
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On the OP engine, I find this stuff fascinating so I Googled around a bit. Seems like one of the biggest problems they had with this engine was getting it started in Russian winters. I can imagine they would. Enough either to start a 61 liter engine would be a might touchy procedure. Imagine how much current they would draw turning over in winter.
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  #20  
Old 01-28-2013, 03:27 PM
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There's a member on this site with a couple Guiberson radial diesels, one of which he plans on installiing in his Stearman. I hope to be part of the rebuild process when it comes around.
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  #21  
Old 01-28-2013, 04:38 PM
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Do you think this engine used shotgun shells to start too? Forgot about those.

edit -- actually shotgun shells would not work on an vee engine would they?
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Last edited by Kurt Smith; 01-28-2013 at 05:07 PM.
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  #22  
Old 01-28-2013, 04:45 PM
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Originally Posted by KarTek View Post
There's a member on this site with a couple Guiberson radial diesels, one of which he plans on installiing in his Stearman. I hope to be part of the rebuild process when it comes around.
Does it start this way?

http://www.youtube.com/watch?NR=1&v=zGLVtA3LHlE
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  #23  
Old 01-28-2013, 05:50 PM
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Quote:
Originally Posted by Adriel View Post
Please elaborate.
There is no CO in diesel exhaust. I don't recall the article I saw on this plane, whether it was a Cessna ad or I saw it on the DTF, but it did make that claim.
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  #24  
Old 01-28-2013, 06:44 PM
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Originally Posted by mach4 View Post

I've seen one of the engines sitting in his shop but I've never looked closely at it to see if it has a fitting for an electric starter. What I understand is that it starts with the Coffman starter but that it's hard on the engine.

I think He was planning on converting the Coffman to a compressed air starter.
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  #25  
Old 01-28-2013, 07:05 PM
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Originally Posted by rscurtis View Post
There is no CO in diesel exhaust. I don't recall the article I saw on this plane, whether it was a Cessna ad or I saw it on the DTF, but it did make that claim.
I questioned this when I read it. It's not so; any time any hydrocarbon burns it will produce carbon monoxide.

"While it is difficult to quantify the typical emissions from a diesel engine, using the current USA regulations for an approximation, 1kg of fuel would produce around 30gm of carbon monoxide, 3.5gm of hydrocarbons, 1.7gm of particulates and 8gm of NOx."

http://www.bp.com/liveassets/bp_internet/australia/corporate_australia/STAGING/local_assets/downloads_pdfs/f/Fuel_news_diesel_engine_emissions.pdf
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  #26  
Old 01-28-2013, 08:54 PM
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I disagree. That figure for CO is for CO2. Since diesels (almost) always run with excess air, there is very little CO produced. That's how they got away so long without emission controls, until PM and NOX became regulated.
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  #27  
Old 01-28-2013, 08:59 PM
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SMART Diesel in Drones

I was at a Tucson MBCA club meeting held at the Tucson MB dealership for a tour of their dealership. While we were there the parts dept rep mentioned that they provide SMART Diesel parts to the Drone program. So the Diesel SMART is in use in the USA... just a little different than we all thought.

If our charming government uses it for itself, why can't they certify the engine for automotive use in the USA? Go figure!

I guess that the fuel effiency is what helps the Drone up in the air for so long.
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  #28  
Old 01-28-2013, 09:33 PM
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Quote:
Originally Posted by KarTek View Post
I've seen one of the engines sitting in his shop but I've never looked closely at it to see if it has a fitting for an electric starter. What I understand is that it starts with the Coffman starter but that it's hard on the engine.

I think He was planning on converting the Coffman to a compressed air starter.
I wonder if it's still possible to buy Coffman cartridges or whether you'd have to reload your own.... I guess a good reason to convert to compressed air. Sounds like a fun project.
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