New engine design with potential OB application

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Author Topic:   New engine design with potential OB application

number9 posted 08-02-2011 10:28 AM ET (US)
This design is from the Down Under and totally different than the fairly recent designs mentioned in topic here.
Found this link on one of the aviation sites. The company had information on a light aircraft application at the recent EAA AirVenture Convention at Oshkosh.
http://www.dukeengines.com/

Article from aeronews.net:

quote:
New 4 Stroke Axial Engine Introduction
Small, Lightweight Mills For Ultralight, Experimental, And UAV Applications
New Zealand-based Duke Engines LTD has introduced the world's only commercial 4-stroke axial piston spark ignited engine, and was showing it last week at Oshkosh.The engine is lightweight, small, valveless, vibration-free, has very high power density, and runs on most fuels, including kerosene/jet fuel. The Duke engine is a great fit for aerospace applications, including ultralight, experimental and UAV platforms. They have 2 prototype models operational; a 103hp model and a 180hp model The former engine weighs 101 lbs with no gearbox required. The latter engine weighs 101 lbs and requires a gearbox.
These Duke engines have negligible 1st order and 2nd order vibrations. They deliver high thermodynamic efficiency and offer complete fuel flexibility. The engines are far less complex than traditional engines because they have only 3 sets of spark plugs, injectors and ports for 5 cylinders with no valve train. The current Duke engines are the 5th generation prototypes.
The aerodynamically friendly cylindrical shape, with output shaft on center line, and low weight, makes it easy to install in small cowlings. The direct drive option produces 0.7 hp/lb., and the geared option produces over 1.0 hp/lb.
The Duke engines will again be tested in the U.S., and the company says it is actively seeking development partners for their marketing efforts in the U.S.

Slick 50 posted 08-02-2011 11:14 AM ET (US)
That is interesting. The coin standing up and spinning some is good. You think the engine is solid mounted?
Rick
number9 posted 08-02-2011 11:51 AM ET (US)
Rick,
No idea about the mounts but looks like a smooth running engine. Didn't you notice the nice sounding exhaust?
Bill
Slick 50 posted 08-02-2011 12:40 PM ET (US)
Yea, the engine sound reminded me of the old movies with airplanes and the axial engines. The preferred engines of choice with air boats in the swamps are axial aircraft engines like the Continental and Lycoming engines. They are much lighter than the heavy auto engines.
Rick
Dave Sutton posted 08-02-2011 11:18 PM ET (US)
"The preferred engines of choice with air boats in the swamps are axial aircraft engines like the Continental and Lycoming engines."

Those would be 4 and 6 cylinder horizontally opposed (boxer) engines, similar in layout to a VW Bug engine or a Porsche 911 engine. Nothing radial (the correct name for a conventional "circular" aircraft engine) about them. The term "axial" is a new construction name not associated with any "legacy' engine designs that I am famaliar with, certainly not any aircraft engines.
Dave
.
fluke posted 08-02-2011 11:35 PM ET (US)
Went to dukeindustry web site and my computer shut down, just a warning.
Mark
Dave Sutton posted 08-03-2011 09:49 AM ET (US)
"Went to dukeindustry web site and my computer shut down"
Worked fine for me.... bearing in mind that the pages are highly graphics and video intensive.
Dave
.
Slick 50 posted 08-03-2011 09:57 AM ET (US)
Dave, you are correct, my mistake. My wife's cousin runs one of these engines and he talked about it as an aircraft engine. I know what a radial engine is and should have caught myself.
Rick
number9 posted 08-04-2011 11:17 PM ET (US)
Apparently the design concept goes back quite far. What's old is new again with modern design updates, materials and manufacturing. Wikipedia info, http://en.wikipedia.org/wiki/Swashplate_engine

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Author	Topic: New engine design with potential OB application
number9	posted 08-02-2011 10:28 AM ET (US) This design is from the Down Under and totally different than the fairly recent designs mentioned in topic here. Found this link on one of the aviation sites. The company had information on a light aircraft application at the recent EAA AirVenture Convention at Oshkosh. http://www.dukeengines.com/ Article from aeronews.net: quote: New 4 Stroke Axial Engine Introduction Small, Lightweight Mills For Ultralight, Experimental, And UAV Applications New Zealand-based Duke Engines LTD has introduced the world's only commercial 4-stroke axial piston spark ignited engine, and was showing it last week at Oshkosh.The engine is lightweight, small, valveless, vibration-free, has very high power density, and runs on most fuels, including kerosene/jet fuel. The Duke engine is a great fit for aerospace applications, including ultralight, experimental and UAV platforms. They have 2 prototype models operational; a 103hp model and a 180hp model The former engine weighs 101 lbs with no gearbox required. The latter engine weighs 101 lbs and requires a gearbox. These Duke engines have negligible 1st order and 2nd order vibrations. They deliver high thermodynamic efficiency and offer complete fuel flexibility. The engines are far less complex than traditional engines because they have only 3 sets of spark plugs, injectors and ports for 5 cylinders with no valve train. The current Duke engines are the 5th generation prototypes. The aerodynamically friendly cylindrical shape, with output shaft on center line, and low weight, makes it easy to install in small cowlings. The direct drive option produces 0.7 hp/lb., and the geared option produces over 1.0 hp/lb. The Duke engines will again be tested in the U.S., and the company says it is actively seeking development partners for their marketing efforts in the U.S.
Slick 50	posted 08-02-2011 11:14 AM ET (US) That is interesting. The coin standing up and spinning some is good. You think the engine is solid mounted? Rick
number9	posted 08-02-2011 11:51 AM ET (US) Rick, No idea about the mounts but looks like a smooth running engine. Didn't you notice the nice sounding exhaust? Bill
Slick 50	posted 08-02-2011 12:40 PM ET (US) Yea, the engine sound reminded me of the old movies with airplanes and the axial engines. The preferred engines of choice with air boats in the swamps are axial aircraft engines like the Continental and Lycoming engines. They are much lighter than the heavy auto engines. Rick
Dave Sutton	posted 08-02-2011 11:18 PM ET (US) "The preferred engines of choice with air boats in the swamps are axial aircraft engines like the Continental and Lycoming engines." Those would be 4 and 6 cylinder horizontally opposed (boxer) engines, similar in layout to a VW Bug engine or a Porsche 911 engine. Nothing radial (the correct name for a conventional "circular" aircraft engine) about them. The term "axial" is a new construction name not associated with any "legacy' engine designs that I am famaliar with, certainly not any aircraft engines. Dave .
fluke	posted 08-02-2011 11:35 PM ET (US) Went to dukeindustry web site and my computer shut down, just a warning. Mark
Dave Sutton	posted 08-03-2011 09:49 AM ET (US) "Went to dukeindustry web site and my computer shut down" Worked fine for me.... bearing in mind that the pages are highly graphics and video intensive. Dave .
Slick 50	posted 08-03-2011 09:57 AM ET (US) Dave, you are correct, my mistake. My wife's cousin runs one of these engines and he talked about it as an aircraft engine. I know what a radial engine is and should have caught myself. Rick
number9	posted 08-04-2011 11:17 PM ET (US) Apparently the design concept goes back quite far. What's old is new again with modern design updates, materials and manufacturing. Wikipedia info, http://en.wikipedia.org/wiki/Swashplate_engine