JoeCook1
Inquisitive Silver Techie
Registered: Feb 2002
Location: Northern California
Posts: 18 |
 Some Alternative Engine Links
Thanks for the new title, Wolfey. It appeared while I was surfing the site. :-) So I got motivated to share some of my engine links.
David is going to post a "Links Page" on the site somewhere eventually. In the meantime, here are some that may be of interest to study what's out there in various forms of development:
The Rad-Cam - http://www.rad-cam.com This is (presently) an 8 cylinder radial with 500cc total displacement that is a 2 stroke-cycle configuration. It was shown at the Sun 'n Fun Fly-In in Florida in April this year (2002). The significant difference about it is the use of cams and rollers to actuate the piston-connecting rod assemblies. It has under piston compression. It has a fully lubiricated dry sump crankcase and has been shown in a running prototype version. At last release it had 20 hours of operation on the prototype without failure. It allegedly developes 40 hp at 3100 rpm and weighs 40 lb. They have a goal of 60 hp and 50 lbs.
The CMC "SyTech" Engine - http://www.cmcpower.com/works.html - This is an Aussie development of the scotch-yoke for the bottom end of a piston engine. They end up with a solid connecting rod link between two opposing pistons with a fully lubricated slider of large area to take the combustion and inertia forces. The opposed cylinders are in the same plane, same as the Bourke/DeVaux. They basically show 4 stroke-cycle applications but claim it could be used with 2 stroke also. They have sold hardware to 3rd parties and these engines have been run successfully.
The CKE Radial Engine - http://www.cke-tech.com/RE_animation.htm - This is essentially a bottom end mechanism to eliminate the angularity and dynamic balance problems of conventional connecting rods in a radial configuration. Uses sliders and a sort of psuedo planetary centerpiece. Claims are higher HP/lb, e.g. 1.2 lb/hp, easier manufacturing and maintenance, lower noise-harshness-vibration (NHV). They also like solenoid operated ceramic valves.
Power Curve - http://www.powerengine.com/an001masterani1l.htm - This is a geared replacement for the scotch yoke in the lower end of an engine, pump, etc. that needs conversion of linear motion to rotary motion or vice versa. They make claims about relative efficiencies and have pictures of their XE-1 engine on a dynomometer. But the dyno data presented is an alleged 7% improvement in friction losses when the "engine" was driven by the dyno at 1500 rpm. They have claimed the Power Curve is great for combustion engines, including the Bourke, but have not demonstrated that with any of the data presented on the site.
The Quasiturbine - http://quasiturbine.promci.qc.ca/QTIndex.html
"A Zero Vibration Turbine Engine" - This is sort of an analytical design study with no indication that it has ever been successfully built and run as an engine. They make a lot of claims but show no actual operating engine hardware. They have run it as a steam and pneumatic motor (chainsaw) operation. They have set a "high priority" to develop the QT400 in 2002 in a 70-100 hp version for ultralight aircraft use. This site is originally in french and the translations are sometimes a little strange. It has been kept up to date with the "News" section containing PR stuff from Mar. 02.
The Turbx Engine - http://www.turbx.com - Click on "Turbx Engines Inc. Revolutionary Propulsion". Is apparently in the early concept development phase. Web page not updated since 4/01 at which time they were looking for venture capital. Claims - 100 hp engine would weigh 25 lbs and get better than 0.33 lb/hp-hr fuel economy. Can burn practically any fuel. This with an effective compression ratio of 3:1!
Anyway, food for thought and "the more the merrier". :-)
Joe
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05-05-2002 08:38 AM
