interesting engine
in [Design]
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From: John Larkin on 22 Jul 2010 22:42 On Thu, 22 Jul 2010 18:33:34 -0600, m II <c(a)in.the.hat> wrote: >John Larkin wrote: > >> My first wife had a Kawasaki 500 three-cylinder two-stroke bike. 0-60 >> in 4 seconds, if it didn't seize up or go unstable and toss you into >> the weeds. She lost her spleen on that one. > > >I had one too. It was an H1. > >Someone called it the world's first disposable motorcycle. The only >thing it did well was accelerate. It didn't brake, corner or save gasoline. > >If used as intended, the piston rings had to be changed every 10 to 12 >thousand miles. Yup. You never took your fingers off the clutch lever. John
From: Damon Hill on 23 Jul 2010 00:27 John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in news:ouog46tg11v71nngcp0lafjalnrdb31cep(a)4ax.com: > > http://www.ecomotors.com/technology Railroad related opposed piston engines: http://en.wikipedia.org/wiki/Napier_Deltic http://en.wikipedia.org/wiki/Fairbanks-Morse#Seagoing_diesel_engines http://en.wikipedia.org/wiki/Opposed_piston_engine Fun stuff, but they (mostly) didn't survive in service where reliability was more important than efficiency. For all their complexity, the Deltic engines were relatively compact. I think running F-M locos still survive, yes? Seems like we've got several in railroad museums here in Washington state... Be interesting to see if this idea survives the real world in hybrid cars where they would seem well-suited. There are some truly scary-big monster diesels in marine service that claim up to 50% efficiency, if you don't mind engines the size of a house... --Damon
From: Jon on 23 Jul 2010 12:07 "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:ouog46tg11v71nngcp0lafjalnrdb31cep(a)4ax.com... > > http://www.ecomotors.com/technology > > > John > I'm not a mechanical engineer so I don't know. It looks like combustions have to be synchronized to avoid violent vibration. At 1.1 hp/lb and 50% fewer parts, let's get this on the road.
From: John Larkin on 23 Jul 2010 12:13 On Fri, 23 Jul 2010 12:07:10 -0400, "Jon" <jon8338(a)peoplepc.com> wrote: > >"John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message >news:ouog46tg11v71nngcp0lafjalnrdb31cep(a)4ax.com... >> >> http://www.ecomotors.com/technology >> >> >> John >> > >I'm not a mechanical engineer so I don't know. It looks like combustions >have to be synchronized to avoid violent vibration. At 1.1 hp/lb and 50% >fewer parts, let's get this on the road. The symmetry of piston acceleration should eliminate a major vibration mode. There will still be some angular nasties. John
From: TTman on 23 Jul 2010 15:31
"John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:8rfj4616d596tdr2sri0dlgg2369juaa8i(a)4ax.com... > On Fri, 23 Jul 2010 12:07:10 -0400, "Jon" <jon8338(a)peoplepc.com> > wrote: > >> >>"John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >>message >>news:ouog46tg11v71nngcp0lafjalnrdb31cep(a)4ax.com... >>> >>> http://www.ecomotors.com/technology >>> >>> >>> John >>> >> >>I'm not a mechanical engineer so I don't know. It looks like combustions >>have to be synchronized to avoid violent vibration. At 1.1 hp/lb and 50% >>fewer parts, let's get this on the road. > > The symmetry of piston acceleration should eliminate a major vibration > mode. There will still be some angular nasties. > > John > This is the way forward.... http://www.proteanelectric.com/live/ |